[IGSREPORT-3773] Wk 0901 G-SINEX Comparisons
AC
AC
Mon May 26 11:44:53 PDT 1997
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IGS Electronic Report Mon May 26 11:44:53 PDT 1997 Message Number 3773
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0901 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0901
(APR 13, 1997 - APR 19, 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:
mit0901g.snx at cddis.gsfc.nasa.gov
jpl0901g.snx at cddis.gsfc.nasa.gov
ncl0901g.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))
jpl0901g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0901g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0901g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0901g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0901g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0901g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0901g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0901g.snx: CASA .110 .000 .000 .128 .000 .000 .001 .000 .000
mit0901g.snx: CASA .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0901g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0901g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0901g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0901g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0901g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0901g.snx: GRAZ .110 .000 .000 .128 .000 .000 1.964 .000 .000
mit0901g.snx: GRAZ .110 .000 .000 .128 .000 .000 1.946 .000 .000
jpl0901g.snx: HRAO .110 .000 .000 .128 .000 .000 9.754 .000 .000
mit0901g.snx: HRAO .110 .000 .000 .128 .000 .000 .081 .000 .000
jpl0901g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0901g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0901g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
mit0901g.snx: MATE .110 .000 .000 .128 .000 .000 .066 .000 .000
ncl0901g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
jpl0901g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0901g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0901g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0901g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
jpl0901g.snx: TAHI .110 .000 .000 .128 .000 .000 7.790 .000 .000
mit0901g.snx: TAHI .110 .000 .000 .128 .000 .000 -5.713 .000 .000
jpl0901g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0901g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0901g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0901g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0901g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0901g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0901g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0901g.snx: WHIT .110 .000 .000 .128 .000 .000 .100 .000 .000
mit0901g.snx: WHIT .110 .000 .000 .128 .000 .000 .010 .000 .000
jpl0901g.snx: XIAN .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0901g.snx: XIAN .110 .000 .000 .128 .000 .000 .384 .000 .000
jpl0901g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0901g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
ncl0901g.snx: YAR1 .000 .000 .000 .000 .000 .000 .073 .000 .000
jpl0901g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0901g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0901g.snx
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0901g.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 BAHR YAR1
CONFIDENCE LEVEL FOR OUTLIER DETECTION: 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat MCM4 JPL-NCL Lat MAC1 JPL-NCL Lat MCM4 MIT-JPL
Lon GUAM MIT-JPL Lon TSKB MIT-JPL Lon SHAO MIT-JPL
Hgt IISC JPL-NCL Hgt IISC MIT-JPL
42 GLOBAL STATIONS:
ALBH ALGO BOGT BOR1 BRAZ BRMU BRUS CAS1 COCO CRO1
DAV1 FAIR FORT GOLD HART IRKT KELY KERG KIT3 KOKB
KOSG KOUR LHAS MALI MDO1 METS NLIB NYAL OHIG ONSA
PERT POTS RCM6 REYK SANT STJO TIDB WES2 WTZR WUHN
YAR1 YELL
11 FIDUCIAL STATIONS:
ALGO FAIR GOLD HART KOKB KOSG SANT TIDB WTZR YAR1
YELL
AVERAGE COORDINATE RMS:
42 GLOBAL STATIONS 11 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.2 0.6 1.0 5.6 6.3 5.9
Lon 1.7 1.4 2.1 6.7 6.3 7.0
Hgt 6.0 5.1 3.3 9.3 9.0 10.0
3D 6.3 5.4 4.0 12.7 12.6 13.6
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
42 GLOBAL STATIONS 11 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.206 1.465 0.312 0.494 0.432 0.524
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 -1.2 5.2 -19.0 5.3 46.4 8.0 2.4 0.6
MIT 1.2 4.0 -14.7 4.1 47.8 4.7 2.0 0.5
NCL -3.8 4.9 -22.5 5.0 40.7 6.8 2.1 0.6
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM mit0901g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM jpl0901g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0901g.snx :
Stations: TROM
MADR WAS NOT USED IN GLOBAL COMPARISON DUE TO LARGE COORDINATE DIFFERENCES
WITH ITRF94, DESCRIBED BELOW:
STATION / GNAAC / LONGITUDE DIFFERENCE (mm.):
MADR JPL -40.9
MIT -39.0
NCL -38.4
--
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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