[IGSREPORT-3614] G-SNX Comparison Wk 895
AC
AC
Mon Apr 7 08:04:44 PDT 1997
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IGS Electronic Report Mon Apr 7 8:04:44 PDT 1997 Message Number 3614
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Author: AC Coordinator / NRCan GSDivision
Subject: G-SNX Comparison Wk 895
Subject: Wk 0895 G-SNX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0895
(MAR 2, 1997 - MAR 8, 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:
mit0895g.snx at cddis.gsfc.nasa.gov
jpl0895g.snx at cddis.gsfc.nasa.gov
ncl0895g.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))
jpl0895g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0895g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0895g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0895g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0895g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
ncl0895g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0895g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0895g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0895g.snx: CRO1 .110 .000 .000 .128 .000 .000 .081 .000 .000
mit0895g.snx: CRO1 .110 .000 .000 .128 .000 .000 .041 .000 .000
jpl0895g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0895g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0895g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0895g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0895g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0895g.snx: GRAZ .110 .000 .000 .128 .000 .000 1.964 .000 .000
mit0895g.snx: GRAZ .078 .000 .000 .096 .000 .000 1.964 .000 .000
jpl0895g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0895g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0895g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
mit0895g.snx: MATE .078 .000 .000 .096 .000 .000 .101 .000 .000
ncl0895g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
jpl0895g.snx: MDVO .070 .000 .000 .068 .000 .000 .149 .000 .000
mit0895g.snx: MDVO .075 .002 -.001 .069 -.001 .002 .146 .000 .000
jpl0895g.snx: MOIN .110 .000 .000 .128 .000 .000 -.103 .000 .000
mit0895g.snx: MOIN .110 .000 .000 .128 .000 .000 .994 .000 .000
jpl0895g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0895g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0895g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0895g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
jpl0895g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0895g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0895g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0895g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0895g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0895g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0895g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0895g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0895g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0895g.snx
MDVO Missing Antenna
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0895g.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 KIT3 MIT-JPL Lat LHAS MIT-JPL Lon GUAM JPL-NCL
Lon TAIW MIT-JPL Lon SHAO MIT-JPL Lon TSKB MIT-JPL
Hgt WHIT JPL-NCL Hgt WHIT MIT-JPL Hgt WHIT MIT-NCL
44 GLOBAL STATIONS:
ALBH ALGO BOGT BOR1 BRAZ BRMU BRUS CAS1 COCO DAV1
FAIR FORT GOLD HART HOB2 KELY KERG KOKB KOSG KOUR
LPGS MAC1 MADR MALI MCM4 MDO1 METS NYAL OHIG ONSA
PAMA PERT POTS RCM6 REYK SANT STJO TIDB WES2 WTZR
WUHN YAR1 YELL ZWEN
12 FIDUCIAL STATIONS:
ALGO FAIR GOLD HART KOKB KOSG MADR SANT TIDB WTZR
YAR1 YELL
AVERAGE COORDINATE RMS:
44 GLOBAL STATIONS 12 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 2.2 2.2 1.7 6.1 6.6 6.0
Lon 2.6 2.4 2.0 13.2 13.1 13.0
Hgt 5.7 6.0 2.5 11.0 11.9 11.0
3D 6.7 6.8 3.6 18.3 18.9 18.1
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
44 GLOBAL STATIONS 12 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.161 0.992 0.612 1.008 0.787 0.902
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 -7.9 5.6 20.1 5.7 -27.7 7.8 -2.5 0.6
MIT -3.9 4.1 19.6 4.2 -24.0 5.0 -2.2 0.5
NCL -3.0 4.8 15.9 4.9 -16.9 6.0 -2.4 0.5
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM mit0895g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM jpl0895g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0895g.snx :
Stations: TROM
--
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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