[IGSREPORT-3839] Wk 0905 G-SINEX Comparisons
AC
AC
Thu Jun 12 11:28:39 PDT 1997
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IGS Electronic Report Thu Jun 12 11:28:39 PDT 1997 Message Number 3839
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0905 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0905
(MAY 11, 1997 - MAY 17, 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:
mit0905g.snx at cddis.gsfc.nasa.gov
jpl0905g.snx at cddis.gsfc.nasa.gov
ncl0905g.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))
jpl0905g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0905g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0905g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0905g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0905g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
ncl0905g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0905g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0905g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0905g.snx: CASA .110 .000 .000 .128 .000 .000 .001 .000 .000
mit0905g.snx: CASA .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0905g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0905g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0905g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0905g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0905g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0905g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0905g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0905g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0905g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0905g.snx: NOTO .110 .000 .000 .128 .000 .000 -.035 .000 .000
mit0905g.snx: NOTO .110 .000 .000 .128 .000 .000 -.001 .000 .000
jpl0905g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0905g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
jpl0905g.snx: THU1 .110 .000 .000 .128 .000 .000 -.035 .000 .000
ncl0905g.snx: THU1 .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0905g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0905g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0905g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0905g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0905g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0905g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0905g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0905g.snx: XIAN .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0905g.snx: XIAN .110 .000 .000 .128 .000 .000 .384 .000 .000
jpl0905g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0905g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0905g.snx
TAHI Multiple Sites
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: TAHI MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0905g.snx
ASC1 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 CHAT DGAR KWJ1 MKEA
CONFIDENCE LEVEL FOR OUTLIER DETECTION: 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lon TROM JPL-NCL Lon TROM MIT-JPL Hgt TROM JPL-NCL
Hgt IISC JPL-NCL Hgt IISC MIT-JPL Hgt TROM MIT-JPL
49 GLOBAL STATIONS:
ALBH ALGO BOGT BRAZ BRMU BRUS CAS1 COCO CRO1 DAV1
FAIR FORT GOLD GUAM HART IRKT KELY KERG KIT3 KOKB
KOSG KOUR LHAS MAC1 MADR MATE MCM4 MDO1 METS NLIB
NYAL OHIG ONSA PERT POTS RCM6 REYK SANT SHAO STJO
TAIW TIDB TSKB WES2 WHIT WTZR WUHN YAR1 YELL
12 FIDUCIAL STATIONS:
ALGO FAIR GOLD HART KOKB KOSG MADR SANT TIDB WTZR
YAR1 YELL
AVERAGE COORDINATE RMS:
49 GLOBAL STATIONS 12 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.7 2.0 1.7 7.2 6.7 6.9
Lon 1.2 1.8 2.0 9.6 9.6 9.2
Hgt 4.0 6.2 4.4 9.2 8.8 8.5
3D 4.5 6.7 5.1 15.1 14.6 14.3
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
49 GLOBAL STATIONS 12 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.314 0.578 0.573 0.597 0.525 0.551
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 -0.8 5.0 28.9 5.1 -50.2 7.8 -1.9 0.6
MIT -1.7 3.9 19.3 4.0 -39.9 4.7 -2.0 0.5
NCL 0.4 4.8 34.6 4.9 -42.8 6.6 -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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