Slide 1

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 2

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 3

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 4

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 5

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 6

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 7

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 8

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 9

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 10

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 11

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 12

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 13

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 14

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 15

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 16

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 17

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 18

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 19

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 20

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 21

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 22

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver


Slide 23

The Motorola PowerStrike
GPS Receiver

By Patrick Svatek
May 8, 2001
The University of Texas at Austin, Dept. of ASE/EM

Overview
•
•
•
•
•

Why the PowerStrike?
What IS the PowerStrike?
About the PowerStrike Receiver
WinOncore Software
Receiver Testing
– Single Receiver
– Dual PowerStrike Receivers
– Simulator Data Testing

• Findings, Conclusions, Remarks
Motorola PowerStrike Receiver

Goals for this Project
•
•
•
•

To understand the PowerStrike receiver
To understand the WinOncore Software
Characterization of the Receiver
Creation of a website not just to meet
the class requirements, but for the
Oncore World to use as a reference
• Gain expertise on CSR’s new receiver
and pass this knowledge on
Motorola PowerStrike Receiver

Why the PowerStrike?
•
•
•
•

Motorola Product
Donated Hardware to CSR
Development potential
Interesting to see engineering
development product before market
• Something new and unexplored

Motorola PowerStrike Receiver

What IS the PowerStrike?
• 12-Channel L1 C/A Only
• Used in terrestrial applications
– Vehicle Navigation / Moving
Map
– OnStar and similar services
– Vehicle Theft Locator
(motorcycles too)
– Shipping Tracking

• Serial Interface, DGPS
capable (receive only)
Motorola PowerStrike Receiver

PowerStrike Kit
Receiver is actually a
combination of
components, including RF
Module, downconverter,
oscillator, correlator, and
processor.

Motorola PowerStrike Receiver

Other Kit Components
•
•
•
•

Active Antenna (preamp internal)
Power
Serial
Software

Motorola PowerStrike Receiver

WinOncore GUI Software
Gives exclusive access to the receiver. Can be used to
“start” the receiver in order to use other vendor
software
Software is standalone and configurable
Datalogging
Graphical

Motorola PowerStrike Receiver

Various Features

Motorola PowerStrike Receiver

Receiver Testing
• Single Receiver
– 18-hour data log @ 15 sec intervals
– Show accuracy of measurements

• Dual Receiver (simultaneous)
– Completely separate hardware, same location
– Accuracy and Robustness of hardware

• Simulated with Single Receiver specs
– Use start time of single test, use average LLH as
reference LLH for sim run
– Show pseudo-precision of measurements
Motorola PowerStrike Receiver

Single Receiver
• Logged NMEA GPS Time, LLH
• Parse data file, post-process for:
– MAX, MIN, AVG, STDEV

Motorola PowerStrike Receiver

Single Receiver LAT Results

Variation
Of
Approx.
11.6 ft
Or
3.53 m

Motorola PowerStrike Receiver

Single Receiver LON Results

Variation
Of
Approx.
8.0 ft
Or
2.47 m

Motorola PowerStrike Receiver

Single Receiver ALT Results

Variation
Of
Approx.
24.6 ft
Or
7.5 m

Motorola PowerStrike Receiver

Dual Receiver
• Data collected simultaneously with
single receiver experiment
• Separate hardware

Receiver 2

Receiver 1

Motorola PowerStrike Receiver

Second Receiver LAT Results

Motorola PowerStrike Receiver

Second Receiver LON Results

Motorola PowerStrike Receiver

Second Receiver ALT Results

Motorola PowerStrike Receiver

Comparison of Both Receivers

Motorola PowerStrike Receiver

Simulated Position
• LLH from AVG
• 2-Hour Simulation from Start Time

Motorola PowerStrike Receiver

Simulated Position Results
Post-Analysis and LLH 2 XYZ gives:
1. Latitude absolute average difference of 0.0125 sec (1.27 ft)
2. Latitude absolute variation difference of 0.0543 sec (5.50 ft)
3. Longitude absolute average difference of 0.0652 sec (5.71 ft)
4. Longitude absolute variation difference of 0.0923 sec (8.09 ft)
5. Altitude absolute average difference of 3.12 ft (.95 m)
6. Altitude absolute variation difference of 18.4 ft (5.62 m)

NOTE: Diff. Almanac, No Tropo & Iono, No Multipath

Motorola PowerStrike Receiver

Conclusions & Remarks
• PowerStrike is a well-designed receiver operating at the
limits of the GPS system
• Not designed for Space Applications, but never tested in
space either
• Testing shows PowerStrike is susceptible to noise from
operation near TVs and AC outlets
• WinOncore Software is an excellent interface tool
• Software has some bugs
• Pseudorange not available during testing
• No easy way to extract data to convert to RINEX for
advanced processing and file-sharing

Motorola PowerStrike Receiver

http://www.ae.utexas.edu/~svatek/gps/index.html
Motorola PowerStrike Receiver