[IGSREPORT-3832] Wk 0902 G-SINEX Comparisons
AC
AC
Wed Jun 11 08:12:26 PDT 1997
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IGS Electronic Report Wed Jun 11 8:12:26 PDT 1997 Message Number 3832
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0902 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0902
(APR 20, 1997 - APR 26, 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:
mit0902g.snx at cddis.gsfc.nasa.gov
jpl0902g.snx at cddis.gsfc.nasa.gov
ncl0902g.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))
jpl0902g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0902g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0902g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0902g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0902g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
ncl0902g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0902g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0902g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0902g.snx: CASA .110 .000 .000 .128 .000 .000 .001 .000 .000
mit0902g.snx: CASA .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0902g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0902g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0902g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0902g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0902g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0902g.snx: GRAZ .110 .000 .000 .128 .000 .000 1.964 .000 .000
mit0902g.snx: GRAZ .110 .000 .000 .128 .000 .000 1.946 .000 .000
jpl0902g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0902g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0902g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
mit0902g.snx: MATE .110 .000 .000 .128 .000 .000 .066 .000 .000
jpl0902g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0902g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0902g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0902g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
jpl0902g.snx: TAHI .110 .000 .000 .128 .000 .000 7.790 .000 .000
mit0902g.snx: TAHI .110 .000 .000 .128 .000 .000 1.054 .000 .000
ncl0902g.snx: TAHI .110 .000 .000 .128 .000 .000 1.023 .000 .000
jpl0902g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0902g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0902g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0902g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0902g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0902g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0902g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0902g.snx: WHIT .110 .000 .000 .128 .000 .000 .100 .000 .000
mit0902g.snx: WHIT .110 .000 .000 .128 .000 .000 .010 .000 .000
jpl0902g.snx: XIAN .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0902g.snx: XIAN .110 .000 .000 .128 .000 .000 .384 .000 .000
jpl0902g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0902g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0902g.snx
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0902g.snx
ASC1 Missing Antenna
AUCK Missing Antenna
CHAT Missing Antenna
DGAR Missing Antenna
KWJ1 Missing Antenna
MKEA Missing Antenna
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: ASC1 AUCK CHAT DGAR KWJ1 MKEA
CONFIDENCE LEVEL FOR OUTLIER DETECTION: 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat TROM MIT-JPL Lat OHIG MIT-NCL Lon TROM JPL-NCL
Lon TROM MIT-JPL Lon TROM MIT-NCL Hgt IISC JPL-NCL
Hgt IISC MIT-JPL Hgt TROM MIT-JPL Hgt TROM MIT-NCL
47 GLOBAL STATIONS:
ALBH ALGO BOGT BRAZ BRMU BRUS CAS1 COCO CRO1 DAV1
FAIR FLIN FORT GOLD GUAM HART IRKT KELY KIT3 KOKB
KOSG KOUR LHAS MAC1 MADR MALI MCM4 MDO1 METS NLIB
NYAL ONSA PERT POTS RCM6 REYK SANT SHAO STJO TAIW
TIDB TSKB WES2 WTZR WUHN YAR1 YELL
12 FIDUCIAL STATIONS:
ALGO FAIR GOLD HART KOKB KOSG MADR SANT TIDB WTZR
YAR1 YELL
AVERAGE COORDINATE RMS:
47 GLOBAL STATIONS 12 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.8 1.6 0.9 6.4 6.9 7.0
Lon 2.4 2.3 1.5 10.0 10.7 9.9
Hgt 5.8 4.2 4.1 10.6 11.6 11.8
3D 6.6 5.1 4.5 15.9 17.2 16.9
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
47 GLOBAL STATIONS 12 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.195 1.543 0.447 0.744 0.799 0.755
OFFSETS AND SCALE FACTOR WRT ITRF94 (FIDUCIAL STATIONS):
(TRANSFORMATION FROM ITRF94 TO GNAAC SINEX FILES)
Tx (mm) STD(mm) Ty (mm) STD(mm) Tz (mm) STD(mm) Scale (ppb) STD(ppb)
------- ------- ------- ------- ------- ------- ----------- --------
JPL -3.2 5.3 27.4 5.3 -34.7 8.1 -2.0 0.6
MIT -8.6 4.0 21.0 4.0 -19.9 4.6 -2.2 0.5
NCL -6.8 5.1 27.4 5.1 -26.6 7.2 -1.9 0.6
--
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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