[IGSREPORT-3666] Wk 0897 G-SNX Comparisons
AC
AC
Wed Apr 23 15:46:43 PDT 1997
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IGS Electronic Report Wed Apr 23 15:46:43 PDT 1997 Message Number 3666
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0897 G-SNX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0897
(MAR 16, 1997 - MAR 22, 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:
mit0897g.snx at cddis.gsfc.nasa.gov
jpl0897g.snx at cddis.gsfc.nasa.gov
ncl0897g.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))
jpl0897g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0897g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0897g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0897g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0897g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
ncl0897g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0897g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0897g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0897g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0897g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0897g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0897g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0897g.snx: JOZE .078 .000 -.003 .074 -.003 -.001 .198 .000 .000
jpl0897g.snx: MOIN .110 .000 .000 .128 .000 .000 -.103 .000 .000
mit0897g.snx: MOIN .110 .000 .000 .128 .000 .000 .994 .000 .000
jpl0897g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0897g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0897g.snx: NOTO .110 .000 .000 .128 .000 .000 -.035 .000 .000
mit0897g.snx: NOTO .110 .000 .000 .128 .000 .000 -.001 .000 .000
jpl0897g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0897g.snx: TAEJ .075 .002 -.001 .069 -.001 .002 .660 .000 .000
jpl0897g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0897g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0897g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0897g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0897g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0897g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0897g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0897g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0897g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0897g.snx
MDVO Multiple Sites
TIDB Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO TIDB
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0897g.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 OHIG MIT-JPL Lat SANT MIT-JPL Lat BRAZ MIT-NCL
Lat OHIG MIT-NCL Lon HART MIT-JPL Lon CRO1 MIT-JPL
Lon COCO MIT-NCL Hgt CRO1 JPL-NCL Hgt MATE MIT-JPL
Hgt CRO1 MIT-JPL Hgt MATE MIT-NCL
44 GLOBAL STATIONS:
ALBH ALGO BOR1 BRMU BRUS CAS1 DAV1 EISL FAIR FORT
GOLD GUAM HOB2 IRKT KELY KERG KIT3 KOKB KOSG KOUR
LHAS MAC1 MADR MALI MCM4 MDO1 METS NYAL ONSA PAMA
PERT POTS RCM6 REYK SHAO STJO TAIW TIDB TSKB WES2
WTZR YAR1 YELL ZWEN
10 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG MADR TIDB WTZR YAR1 YELL
AVERAGE COORDINATE RMS:
44 GLOBAL STATIONS 10 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 0.8 0.8 0.9 9.6 9.7 9.6
Lon 1.5 2.0 1.4 6.5 6.8 7.4
Hgt 3.5 3.1 2.9 12.1 12.2 12.2
3D 3.9 3.8 3.3 16.8 17.0 17.2
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
44 GLOBAL STATIONS 10 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.200 0.486 0.260 1.079 0.981 1.088
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 -9.3 5.1 5.1 5.3 -21.9 6.6 -3.3 0.6
MIT -14.1 4.4 6.0 4.5 -34.9 5.0 -3.3 0.6
NCL -6.2 4.9 -0.1 5.1 -20.3 6.1 -3.1 0.6
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM mit0897g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM jpl0897g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0897g.snx :
Stations: TROM
EXPERIENCED DIFFICULTY DECONSTRAINING mit0897g.snx.
[Mailed From: Jan Kouba <kouba at geod.emr.ca>]
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