[IGSREPORT-3709] Wk 0900 G-SINEX Comparisons
AC
AC
Tue May 6 10:35:40 PDT 1997
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IGS Electronic Report Tue May 6 10:35:40 PDT 1997 Message Number 3709
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0900 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0900
(APR 6, 1997 - APR 12, 1997)
Contacts: J. Kouba (kouba at geod.emr.ca)
D. Hutchison(hutch at geod.emr.ca)
COMPARISON ALGORITHM:
1. MIT and NCL GNAAC combined SINEX solutions for the week in question
were deconstrained. The JPL SINEX file is already unconstrained.
2. Any stations not present in all GNAAC combined SINEX files were de-
leted from all three combined solutions. Every solution was then sub-
jected to a 7-parameter transformation into a common reference system
(the 13 ITRF94 station positions).
3. Outliers are determined at the 99.0% confidence level for each coordin-
ate. If a station has an outlier in either latitude, longitude, or
height, it is ignored in all subsequent computations.
FILES COMPARED:
mit0900g.snx at cddis.gsfc.nasa.gov
jpl0900g.snx at cddis.gsfc.nasa.gov
ncl0900g.snx at cddis.gsfc.nasa.gov
GNAACs: MIT JPL NCL
STATIONS WITH INCONSISTENT ANTENNA ECCENTRICITY INFORMATION:
(FILE: / STATION / L1 (UNE) / L2 (UNE) / ECCENTRICITY (UNE))
(UNE = Up North East (metres))
jpl0900g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0900g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0900g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0900g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0900g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0900g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0900g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0900g.snx: CASA .110 .000 .000 .128 .000 .000 .001 .000 .000
mit0900g.snx: CASA .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0900g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0900g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0900g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0900g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0900g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0900g.snx: GRAZ .110 .000 .000 .128 .000 .000 1.964 .000 .000
mit0900g.snx: GRAZ .110 .000 .000 .128 .000 .000 1.946 .000 .000
jpl0900g.snx: HRAO .110 .000 .000 .128 .000 .000 9.754 .000 .000
mit0900g.snx: HRAO .110 .000 .000 .128 .000 .000 .081 .000 .000
jpl0900g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0900g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0900g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
mit0900g.snx: MATE .110 .000 .000 .128 .000 .000 .066 .000 .000
ncl0900g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
jpl0900g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0900g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0900g.snx: NOTO .110 .000 .000 .128 .000 .000 -.035 .000 .000
mit0900g.snx: NOTO .110 .000 .000 .128 .000 .000 -.001 .000 .000
jpl0900g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0900g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
jpl0900g.snx: TAHI .110 .000 .000 .128 .000 .000 7.790 .000 .000
mit0900g.snx: TAHI .110 .000 .000 .128 .000 .000 1.023 .000 .000
jpl0900g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0900g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0900g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0900g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0900g.snx: WHIT .110 .000 .000 .128 .000 .000 .100 .000 .000
mit0900g.snx: WHIT .110 .000 .000 .128 .000 .000 .010 .000 .000
ncl0900g.snx: WHIT .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0900g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0900g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
ncl0900g.snx: YAR1 .000 .000 .000 .000 .000 .000 .073 .000 .000
jpl0900g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0900g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0900g.snx
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0900g.snx
ASC1 Missing Antenna
AUCK Missing Antenna
CHAT Missing Antenna
DGAR Missing Antenna
KIRU Missing Antenna
KWJ1 Missing Antenna
MKEA Missing Antenna
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: ASC1 AUCK CHAT DGAR KIRU KWJ1 MKEA BAHR YAR1
CONFIDENCE LEVEL FOR OUTLIER DETECTION: 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat SANT MIT-JPL Lat SANT MIT-NCL Lat CAS1 MIT-NCL
Lat BRAZ MIT-NCL Lon MCM4 JPL-NCL Lon WUHN JPL-NCL
Lon MCM4 MIT-NCL Lon BRAZ MIT-NCL Hgt WUHN JPL-NCL
Hgt GUAM JPL-NCL Hgt GOLD JPL-NCL Hgt WUHN MIT-JPL
Hgt KERG MIT-NCL
38 GLOBAL STATIONS:
ALBH ALGO BOGT BOR1 BRMU BRUS COCO CRO1 DAV1 FAIR
FORT HOB2 KELY KIT3 KOKB KOSG KOUR LHAS MAC1 MALI
MDO1 METS NLIB NYAL ONSA PERT POTS REYK SHAO STJO
TAIW TIDB TSKB WES2 WTZR YAR1 YELL ZWEN
8 FIDUCIAL STATIONS:
ALGO FAIR KOKB KOSG TIDB WTZR YAR1 YELL
AVERAGE COORDINATE RMS:
38 GLOBAL STATIONS 8 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 2.6 3.1 1.9 6.3 6.1 7.0
Lon 2.6 3.1 2.5 9.2 9.3 11.0
Hgt 3.6 3.8 4.5 11.8 10.8 11.8
3D 5.2 5.8 5.5 16.2 15.5 17.6
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
38 GLOBAL STATIONS 8 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.670 0.665 0.931 0.862 0.552 1.036
OFFSETS AND SCALE FACTOR WRT ITRF94 (FIDUCIAL STATIONS):
Tx (mm) STD(mm) Ty (mm) STD(mm) Tz (mm) STD(mm) Scale (ppb) STD(ppb)
------- ------- ------- ------- ------- ------- ----------- --------
JPL -2.4 5.8 13.4 6.0 -66.9 8.3 -2.7 0.7
MIT 0.0 4.7 14.6 4.9 -50.1 5.8 -2.3 0.6
NCL 5.9 5.1 14.1 5.4 -71.6 6.3 -3.2 0.6
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM mit0900g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM jpl0900g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0900g.snx :
Stations: HART TROM
MADR WAS NOT USED IN GLOBAL COMPARISON DUE TO LARGE COORDINATE DIFFERENCES
WITH ITRF94, DESCRIBED BELOW:
A STATION HAS LONGITUDE DIFFERENCES WITH ITRF94 IN EXCESS OF 3 CM.:
Station : MADR
STATION / GNAAC / LONGITUDE DIFFERENCE (mm.):
MADR JPL -35.9
MIT -33.9
NCL -33.7
--
David Hutchison
Geodetic Survey of Canada
Ottawa, Ontario, Canada
Internet: hutch at geod.emr.ca
[Mailed From: David Hutchison <hutch at geod.emr.ca>]
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