Transcript www.anasphere.com

AnaSonde Flight and Operation
AnaSonde Information
• The AnaSonde-E and the AnaSonde-3M operate in the 70-cm amateur radio
band so an amateur radio license is required to operate them.
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See our FAQ at anasphere.com for important information about the
legal issues surrounding transmitter operation.
• The typical receiver setup recommended by Anasphere is an amateur radio
receiver paired with a directional antenna such as a Yagi.
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Complete receiver kit is available from Anasphere: Yaesu VR-120D
receiver, Cushcraft A430-11S Yagi antenna, and cables to connect
them.
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The launch balloon and parachute are included in the AnaSonde
kit; all that you as the user has to provide is a 9-volt battery and
helium.
• The other AnaSondes (Blink-E, Buzz-E, and SpectraSonde) do not fly, but are
perfect for use in the classroom or outside in your backyard!
Photo of Receiver/Antenna
Flight Preparation
*Skip the flight preparation slides for AnaSondes that do not fly.
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Make a sun shield for the AnaSonde by rolling the 1.5x5” index card into a
tube and taping it.
Lay the space blanket down on the mesh so that it is centered on the mesh
with the gold side out. (This is called multi-layer insulation, much like that
used on spacecraft.)
Wrap the mesh/space blanket sandwich around the tube with the mesh side
in and tape it in place. (This will protect the sensors that are sensitive to
sunlight.)
Slip the shield around the AnaSonde and tape it to hold it in place.
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The shield should cover the temperature and humidity sensors.
Flight Preparation
Cut a 3-ft long piece of Dacron line and tie a small loop in one end of it, of about
½”. (This will go to the cable tie that seals the balloon.)
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Tie the other end of this line to the loop on the top of the parachute.
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Use the remaining Dacron line (about 3-ft) to attach the AnaSonde to the loop
where the parachute lines come together.
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When attaching the AnaSonde, it is best to tie a loop around the 9-volt battery
snap such that the loop around the snap passes between the battery terminals.
This way, when the battery is snapped on, the loop can't come off.
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Fill the balloon with helium.
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The balloon should lift about half again as much mass as the mass of
the AnaSonde plus its battery.
Typically, the AnaSonde + 9-volt alkaline battery will have about a 60
gram mass. Therefore, the lift should be about 90 grams.
Filling the Balloon with Helium Tips
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Make up a dummy mass using small blocks of wood with holes drilled in
them.
Secure the appropriate mass of blocks to a small binder clip with a loop of
wire.
When you are ready to check the balloon lift, twist the neck closed and use
the binder clip to hold the neck closed and to hold the weights to the balloon.
You have the right amount of helium when the balloon can just lift the dummy
mass.
Tip Pictures
Use blocks of wood connected to a binder clip to measure
the lift of the balloon. Pinch the neck of the balloon with the
binder clip to test the lift without having to tie the balloon.
Unclip the neck and add more or release some helium in
order to achieve the right amount of lift.
Flight Preparation
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Take the end of the line that goes to the parachute (this is the end with the
small loop in it that you tied in a previous step) and put it around the cable
tie.
With the balloon neck twisted closed put the cable tie around the neck and
tighten it to hold the balloon closed and to attach the payload (the
AnaSonde) to the balloon.
Setting up the Computer
For All AnaSondes
Software
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In order to collect data from the AnaSondes, you must first have the
software necessary to do so.
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SondeWorks is Anasphere's custom data acquisition software that is
used to display the data from the AnaSondes.
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Download SondeWorks onto your computer from
anasphere.com.
Direct URL: http://anasphere.com/education_anasonde.php
CwGet is the software needed to log and display Morse code data in
real time.
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Download CwGet from an off-site link on the Anasphere
website located at the same URL highlighted above.
AnaSonde-3M Programmer is the software used to program your
customizable AnaSonde-3M.
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Download the 3M Programmer from the same Anasphere
URL highlighted above.
Radio Setup
1. Be sure you have reasonably fresh batteries in the receiver.
2. Attach the receiver to the antenna using the BNC to UHF cable.
3. Turn on the receiver by holding down the power button.
4. Tune the receiver to 433.920 MHz (the typical frequency for the AnaSonde).
If the frequency is way off from where you last used it, you may have
inadvertently hit the band select (BND^) button. Push it repeatedly until it
shows a frequency closest to what you’re looking for.
Radio Setup
5. Verify that you are in AM mode, as shown at the top of the display.
6. Verify that the attenuator is out (not showing AT at the top of the display).
7. Turn the squelch (outer knob next to antenna, labeled SQL) all the way down
so that you may hear a background hiss.
8. Set the volume to the middle of the range.
9. Turn on the AnaSonde.
Radio Setup
10. When the sonde is transmitting, tune for the best received signal strength.
Almost all AnaSondes have their main transmission frequency in the
433.800-434.000 MHz range. If you get outside of that, you’ve probably gone
too far.
It is best if no one is touching the sonde during the tuning process; it is fine to
be holding it by the string which supports it, but don’t physically touch or
come close to the sonde (especially the antenna).
Radio Setup
11. You can fine-tune the receiver by ear. When you are receiving the best
signal, it will sound comparatively smooth, with a clearer 600 Hz tone; when
you are slightly off frequency, it will sound more tinny and pitchy.
12. Now hook up the radio’s speaker output jack (under the rubber cover
labeled SP) to the computer’s microphone input jack using the 1/8-inch
mono plug to 1/8-inch mono plug audio cable. Note that some operators
have experienced trouble when using a laptop computer that was plugged
into the AC power line.
13. Your radio receiver is now set up.
Antenna Set-up
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Obtain an antenna and set it up according to the instructions that come with
it.
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Anasphere suggests using a Cushcraft A430-11S Yagi antenna.
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The cables to connect the receiver and the antenna are available from
Anasphere.
Programming the 3M
Download Programming Software
‒ http://anasphere.com/education_anasonde.php
Open up the programmer on your computer after download completes
First, select and set the value for Delay Between Transmissions or leave as the
default value.
You may next decide between a Radio option or Serial Port option. For most
users and cases, you will choose the Radio option.
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Set the Morse Speed you would like for dot = msec.
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Enter the Callsign of the operator. You must have a callsign to
legally operate the flight AnaSondes. (See the FAQ section on the
Anasphere website for more pertinent information.)
Programming the 3M
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The AnaSonde-3M is customizable because it has the ability for userdefined settings. This includes user-selected sensors and channels for
those sensors.
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Set the Channel Configuration for the 3M next.
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To select a channel that is being used on the AnaSonde, check the
box next to the corresponding channel.
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To change the sensor belonging to a certain channel simply click
on the channel listing and another window will open up where the
user may select which sensor is installed in that channel.
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Next, select the Com Port that the computer is using.
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This assumes that the user will leave the Standard Equation
bulleted.
You may ask the computer to search for Coms under the ComPort
tab along the top of the programmer screen.
Underneath the Help tab is a set of programming instructions to follow to
finish the programming procedure.
CwGet
• CwGet is the software necessary for SondeWorks to receive the radioed data
from the AnaSonde and interpret the data.
• After downloading CwGet, open it up.
• If you would like to be able to hear the code as it comes over the radio from
the AnaSonde, choose the Setup tab > Sound Output > Sound Without
Filtering. This will allow you to hear the transmission even when the radion is
plugged into the computer.
• Also under the Setup tab, uncheck the Logarithmic Spectrogram (Alt-Z).
This is for easiest viewing, though this is a user preference. These items
(Logarithmic Spectrogram and Logarithmic Oscillogram) refer to the graphical
displays at the top and bottom of the window, respectively.
• The Main Filter and Burst Filter (also under Setup) are variables that the user
can investigate and experiment with to find the best fit.
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As a general starting point:
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Set the Main Filter to 140Hz
Set the Burst Filter to 50 LPM
CwGet
• When receiving audio from the AnaSonde, grab the vertical red slider bar in
the top window and slide it onto the highest peak you see, right around 600
Hz.
• While receiving audio, press the GoToMax button to let the program fine-tune
the location of that red bar. Do NOT use AutoGoToMax! If you do, the bar
will wander during pauses in transmissions and get off frequency.
• After you get the top red bar centered on frequency, move to the bottom
display which should be showing lots of vertical spikes (or, at low speeds,
these would be seen to be dots and dashes over time). Move the horizontal
red bar up or down until it is cutting through the middle of these spikes or
peaks. At this point, what may have been gibberish in the center text window
(lots of e’s, t’s, n’s, dots and dashes in curly brackets) should become legible
data with / character delimiters.
It is best if the spikes or peaks just reach to the top of the lower window or a
bit beyond (become flat-topped). This is controlled by adjusting the volume
on your receiver. As signals get weaker, they may not reach to the top any
more – in that case, just turn the volume on the receiver all the way up.
CwGet
• Adjust the horizontal red bar in the bottom CwGet window up or down to
improve signal quality. Moving it up reduces sensitivity, but can block local
RF noise sources. Moving it down improves sensitivity, but at the expense of
becoming more vulnerable to noise.
CwGet
Set this vertical red
bar to the highest
peak in the frequency
left to right.
Legible data with /
character delimiters
will show up in this
box after the red
vertical and horizontal
bars are adjusted.
Move the horizontal
red bar up or down
until it is cutting
through the middle of
the spikes and peaks.
SondeWorks
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Open up the SondeWorks program.
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Follow the prompts the program walks you through:
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What would you like to do?
• For a new flight or data acquisition, choose:
Operate an AnaSonde
• To bring up past data, choose: Work with saved files
Click on the green arrow pointing to the right towards the bottom left of the
window to move onto the next step.
Enter in the configuration for the AnaSonde
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For the 3M: Manually enter in the configuration that you obtained
from programming the sonde with the 3M programmer.
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For the E: The computer can automatically read the E's
configuration. Simply click on the configure button and a change
from a red dot to a green one signifies success. (The sonde needs
to be on and transmitting for this to be successful.)
Changes in color from red to green with a successful configuration.
Click the green arrow to move to the next step (or to back up).
SondeWorks
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Enter the Launch Elevation next. This can be entered in meters or feet by
making sure the bullet of the chosen unit is selected.
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Click the green next arrow again.
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A prompt will pop up telling you to click “Run” to begin collecting data.
Double check your radio to make sure it is properly tuned and that CwGet
is successfully acquiring the data; and then click on “Run”.
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A “Save” window will then pop up allowing you to save the upcoming
project.
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After you have saved, the acquisition into SondeWorks will begin.
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The telemetry will be scrolling along the bottom of SondeWorks.
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You may customize the graph appearance and parameters as the program
is running by clicking on the various components of the graph you would
like to change.
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Each data point will appear as a dot on the graph and as a numerical
value in the chart below the graph.
SondeWorks
• If SondeWorks is having trouble attaining data points, double check the
tuning of you radio and also that the highest peak is selected in the upper
window of CwGet and the red line is intersecting the peaks of the
transmission in the lower window and not getting cut off.
• Once you are done collecting data, click on “Stop”. A prompt will appear to
ask you if you really want to stop collecting data. Click “Yes”.
• Click the green next arrow once more and there will be loading, saving, and
printing options to choose from.
• Since you saved in the beginning, you may exit whenever you are finished
and your project will be saved.
Flight
For Flight AnaSondes
• After CwGet and SondeWorks are set up and everything is working properly,
it is time to fly your AnaSonde!
• Double-check that everything is working and that the batteries are fresh and
that the attenuator is off and let it go!
Sonde notes:
1. Batteries: The AA batteries should be Energizer AA lithium cells. The 9-volt
should be an Ultralife lithium battery. The sonde would probably work with an
alkaline 9-volt, but would be likely to have problems with alkaline AA cells.
In Flight
These instructions are to help with maintaining a good signal for the longest possible duration.
1. The first thing to do when signal gets weak is to turn off the attenuator, if you
haven’t already.
2. Be sure that the antenna is pointing at the sonde, or in the last known
direction. Once the sonde gets far away, the beam width of the antenna is
such that small pointing errors won’t matter any more. It’s okay to move it
around some trying to get a better signal, but don’t get carried away.
3. Turn the volume up so that in the CwGet window the peaks in the bottom
window reach all the way to the top of the window...or as close as you can get
them as the signal gets weaker.
In Flight
4. Adjust the horizontal red bar in the bottom CwGet window up or down to
improve signal quality. Moving it up reduces sensitivity, but can block local
RF noise sources. Moving it down improves sensitivity, but at the expense of
becoming more vulnerable to noise.
5. Periodically check the tuning of the receiver. The transmitter may drift in
frequency a bit with temperature or time. For low altitude flights (as with the –
2G high speed profiler sondes), this is unlikely to drift more than about 5-20
kHz (that’s 0.005 – 0.020 MHz, or just one to four clicks of the tuning knob).
So, if you aren’t hearing a signal, or it’s weak, adjust the tuning a little bit.
Don’t get carried away! When in doubt, return to the last frequency that was
working.
You may find that it is easier to listen to the radio directly rather than via
CwGet and the computer when checking tuning. Yes, tuning checks sacrifice
a bit of data – but if you’re needing to seriously tweak tuning, chances are
that data was already being lost anyway.
Operation Tips
1. After the sonde begins transmitting time data, waiting a minute or so before
launching it will allow the sonde to acquire more accurate launch altitude
data.
2. You may want to collect several seconds of throwaway data on the ground
prior to launching so that you have a chance to check the tuning of the
receiver.
Operation Tips
4. Keep the sonde at arm’s length so that the internal GPS antenna has the
best view of the sky.
5. Keep your hands away from the radio antenna to avoid altering its frequency.
Troubleshooting
If you aren’t hearing data but expect to, be sure the volume is turned up, the
squelch is turned down, and the antenna is pointed in generally the right
direction. Then try adjusting the tuning in small steps up and down. Don’t go
too fast, and don’t get carried away! The signal should be within about 5-20
kHz or so (0.005 to 0.020 MHz) of your originally tuned frequency – so just a
click or two of the tuning knob up or down should get a good signal again.
IF YOU THINK YOU’VE HAD A SOFTWARE ERROR AND ALL DATA MAY BE
LOST:
CwGet maintains a buffer with all characters received. Just use your mouse to
select all of the characters in the CwGet window, copy them, and paste them
into a text document in Notepad or another text editor program. That is your
full record of raw telemetry, and we can help you retrieve the data from this
file (or advise you how to do it).
Also – all SondeWorks programs maintain a secondary, backup data file
independent of your main data file. This secondary file likely has your data
as well, and we can help you identify this file if needed.
Common Problems
1. The squelch isn’t turned all the way down.
2. The volume isn’t turned up high enough.
3. The batteries are low.
4. The attenuator is in, as shown by AT on the display. Turn it off by pushing
FUNC (button on the left side) and, while holding FUNC down, press the far
right button (of the 4 on the front) labeled MODE (with ATT in white below it).
Common Problems
5. The automatic as opposed to manual tuning function is enabled, as shown by
B on the display. Turn it off by pressing the second button from the right,
labeled V/M. If the automatic tuning is operational, the incoming signals tend
to be slightly clipped (more easily heard than seen), resulting in garbled data.
6. The receiver is not set to AM mode. Press MODE repeatedly until the top of
the display shows AM (as opposed to FM or WFM).
7. The tuning step is too big (25 kHz instead of 5 kHz). Refer to the radio
manual to set the tuning step to 5 kHz to more accurately tune the sonde and
improve signal quality.
Common Problems
8. The battery save function is on, as shown by S on the display. Turn it off
according to the user’s manual.
9. Some PCs have advanced sound controls for bringing in audio signals, and
these controls may attenuate your incoming signal. Refer to your sound
card’s instructions for troubleshooting this issue.
Finish
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You have now successfully acquired data from your AnaSonde!
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If you sent your 3M or E into the atmosphere, build another to enjoy
another learning and exciting experience!
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If you have an AnaSonde that doesn't fly, try another location to see what
other kinds of data you can receive!