Transcript Development of Advanced Precise Positioning System (APPS

AOGS2006
Singapore, Jul 10-14, 2006
Development of Advanced
Precise Positioning System
(APPS) for Automated
Geodetic GPS Processing
ICHIKAWA Ryuichi and KOYAMA Yasuhiro
Kashima Space Research Center, NICT
Xiong MIN and KANZAKI Masayuki
Nippon GPS Solution Corporation
Overview
Motivation
 APPS System Description
 APPS Processing Procedure
 Examples of Processing Results
 Concluding Remarks

Motivation

millimeter positioning using GPS [Rocken and
Johnson, 1999]
•
•
•
•
•
only geodetic specialist
multi-hour static data sets
dual-frequency GPS receiver
high quality GPS orbit
earth’s physical model



earth rotation parameters
atmospheric mapping function
earth tide (solid, ocean, and atmosphere)
• highly sophisticated software
• high level of data processing expertise

Easy to Use!!
• Our purpose -> User can get highly accurate
relative positions using just one GPS receiver
without any geodetic understandings.
Similar Online GPS Processing
Services

AUSPOS
• the Australian Surveying and Land Information
Group (AUSLIG) Online GPS Processing System,
Australia
• http://www.ga.gov.au/geodesy/sgc/wwwgps/

OPUS
• the On-line Positioning User Service provided
by the National Geodetic Survey (NGS), USA
• http://www.ngs.noaa.gov/OPUS/
Comparison with other services
AUSPOS
OPUS
APPS
User location
Anywhere on
Earth
North and
central America
Anywhere on
Earth
FTP option
YES
NO
YES
Mail service
NO
NO
YES
Web service
YES
YES
Under
development
Orbit selection
NO
NO
YES
Tropospheric
delay estimation
NO
NO
YES
System Descriptions
APPS works with data collected
anywhere on Earth
 Server system

• PC specification

Dual Xeon CPU (2.8GHz, 1MB L2 cache,
800MHz FSB) with 2GB DDR Memory
• OS

Red Hat Enterprise Linux
• GPS data processing software

Bernese Ver.4.2
[Hugentobler et al., 2001]
Reference stations for user data
processing using APPS

International GNSS Service (IGS) tracking
station: more than 340 stations
Reference stations for user data
processing using APPS (contd.)

GEONET
• The Geographical
Survey Institute
(GSI) of Japan is
operating the GPS
earth observation
network (GEONET)
consisting of more
than 1200
continuous GPS
stations in Japan.
•APPS processes the user
data with the data at the
three most closest stations
automatically.
•User can choose any IGS
and GEONET stations as
reference stations
manually.
IGS tracking station
GEONET station
APPS processing procedure


GPS observation by user
To transfer GPS data to APPS server
• by e-mail
• user’s FTP server
• by WEB site (under development)



User GPS data is processed by APPS.
To send back processed results to user
Processing of multiple data files is
available.
Subject:
Date:
From:
To:
FORM for APPS PROCESS
Wed, 5 Jul 2006 09:38:14 +0900 (JST)
APPS <[email protected]>
blank mail
****@XXX.XXX.XX RINEX
APPS
Processing
Time Window
00:00:00-23:59:59
(default) Procedure (contd.)
data
multi-session is available
Elevation Cut Off Angle
##############################################
Hello, I'm automail service in APPS
ex. session
00:00UT
03:00UT
Thanks
to have a 1
contact
with
me!
15 degrees
If you'd
like to 2
use03:00UT
this service,
session
- 06:00UT
please notice the format
below
:
##############################################
:
##### header
part #####
session
8
To: [email protected]
Subject: PROCESS
<User’s reply>
21:00UT - 24:00UT
> ##### body part #####
##### body part #####
> #APPS_BODY_START
#APPS_BODY_START
> TIME_WIND
00:00:00 23:59:59 0
TIME_WIND
00:00:00 23:59:59 0
> CUT-OFF
10
CUT-OFF
15
> SAMPLING
120
SAMPLING
120
> PRODUCTS
igs
PRODUCTS
igs
> FIX_AVE
FIX_AVE
> FIXED
GUAM
FIXED
> COMPARE
0821 0001 0006 0029
COMPARE
> FTP-PATH
FTP-PATH
> ELEV-DEP
COSZ
ELEV-DEP
COSZ
> MAP_FUNC
DRY_NIELL
MAP_FUNC
DRY_NIELL
> EST_TRP
NO 24 1
EST_TRP
LINEAR 8 1
> OUT_FORM
SNX TRO TRP
OUT_FORM
SNX TRO
> #APPS_BODY_END
#APPS_BODY_END
##### attachment file #####
rinex file (????????.??o or ????????.??d)
(default)
IGS products
•Final orbit
•(IGS,COD,EMR,ESA,
GFZ,IGS,JPL,MIT,NGS)
•Rapid orbit
reply
•(IGR,COR)
•Ultra rapid orbit
•(IGU,COP)
APPS server
at KSRC of NICT,
low elevation weighting
Japan
COSZ or NO
atmospheric mapping function
NMF, Hopfield, and COSZ
tropospheric delay estimation
•time interval
•With/wo horizontal gradient
Result from APPS
Result
within 15 minutes
COORDINATE OUTPUT
----------------SITE:
0053
SITE1: END=06/04/16
GUAM
EPOCH: START=06/04/09 00:00:00
23:59:59
SITE2: 0001
APPS server
(m) KSRC,
at
Japan
HeightRES
(m)
TIME_WIND
Slope
TIME_WIND
Lat.
(deg.)
Lon. (deg.)
+-------------------------------------+---------------+-------+-------------------------------------+------------------+------------------+------------------+
- 06/04/09 23:59:59
3493567.1618
0.0030
06/04/09 00:00:00 - 06/04/09 06/04/09
23:59:59 00:00:00
37.3823753837000
136.8891647626000
51.3813
06/04/10
00:00:00
06/04/10
23:59:59
3493567.1697
0.0109
06/04/10 00:00:00 - 06/04/10 23:59:59
37.3823754627000 136.8891646849000
51.3646
06/04/11
00:00:00
06/04/11
23:59:59
3493567.1593
0.0005
06/04/11 00:00:00 - 06/04/11 23:59:59
37.3823753016000 136.8891647045000
51.4061
06/04/12
00:00:00
06/04/12
23:59:59
3493567.1616
0.0028
06/04/12 00:00:00 - 06/04/12 23:59:59
37.3823753370000 136.8891646803000
51.3937
- 06/04/13 23:59:59
3493567.1540 -0.0048
06/04/13 00:00:00 - 06/04/13 06/04/13
23:59:59 00:00:00
37.3823752764000
136.8891647522000
51.3967
06/04/14
00:00:00
06/04/14
23:59:59
3493567.1549
-0.0040
06/04/14 00:00:00 - 06/04/14 23:59:59
37.3823752845000 136.8891647698000
51.3946
- 06/04/15 23:59:59
3493567.1581 -0.0008
06/04/15 00:00:00 - 06/04/15 06/04/15
23:59:59 00:00:00
37.3823753343000
136.8891647068000
51.3929
06/04/16
00:00:00
06/04/16
23:59:59
3493567.1513
-0.0076
06/04/16 00:00:00 - 06/04/16 23:59:59
37.3823752517000 136.8891647584000
51.4249
+-------------------------------------+---------------+-------+-------------------------------------+------------------+------------------+------------------+
AVERAGE:
3493567.1588
RMS:
AVERAGE:
37.3823753289875 136.8891647274375 0.0054
51.3944
RMS:
0.0000008259062
0.0000019073486
0.0163
Example of Processing Result
using APPS

Reference
station
User location
• GUAM, TSKB,
USUD

Baseline Length
• Ranging 50 3500km

USUD
TSKB
8 days data
• Apr. 9 – Apr. 16,
2006
GUAM
Example of Processing Results
using APPS (contd.)
TSKB - Mt. Fuji
USUD - Mt. Fuji
Example of Processing Results
using APPS (contd.)
Example of Processing Results
using APPS (contd.)
Wakkanai
Wajima
Hamamatsu
GUAM
Concluding Remarks


We have developed the APPS.
The prototype of the APPS is in beta test,
meaning it is generally available to the
researchers.
• Please contact: [email protected] or [email protected]

Repeatability
• 1-12mm RMS in baseline length
• 1-8mm RMS in horizontal
• 1-25mm RMS in vertical

Estimation of Tropospheric parameters is
available.
Acknowledgement: We thank the RINEX GPS data used in
this study are supplied by IGS and GEONET of GSI, Japan.
Outlook

Processing software upgrade
• Bernese Ver.4.2 -> Ver.5.0
• Precise Point Positioning (PPP)

Additional model implementation
• Ocean Tide

NAO99b
[Matsumoto et al., 2000]
• Atmospheric Mapping Function based on the numerical
weather model


ex. IMF
[Niell, 2001],
Additional Output
VMF
[Boehm and Schuh, 2004]
• Ionosphere information


total electron content (TEC)
Experiment using Satellite Internet link (under
consideration)
Communication Satellites for AsiaPacific regions

Engineering Test
Satellite VIII (ETSVIII)
• to be launched in 2006
• Mobile communications

Wideband
Internetworking
Engineering Test and
Demonstration
Satellite (WINDS)
• to be launched in 2007
• 1.2 Gbps
communication