[IGSREPORT-3837] Wk 0904 G-SINEX Comparisons
AC
AC
Thu Jun 12 10:32:42 PDT 1997
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IGS Electronic Report Thu Jun 12 10:32:42 PDT 1997 Message Number 3837
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0904 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0904
(MAY 4, 1997 - MAY 10, 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:
mit0904g.snx at cddis.gsfc.nasa.gov
jpl0904g.snx at cddis.gsfc.nasa.gov
ncl0904g.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))
jpl0904g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0904g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0904g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0904g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0904g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
ncl0904g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0904g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0904g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0904g.snx: CASA .110 .000 .000 .128 .000 .000 .001 .000 .000
mit0904g.snx: CASA .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0904g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0904g.snx: DRAO .110 .000 .000 .128 .000 .000 .099 .000 .000
ncl0904g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0904g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0904g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0904g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0904g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0904g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0904g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0904g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0904g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
jpl0904g.snx: TAHI .110 .000 .000 .128 .000 .000 7.790 .000 .000
mit0904g.snx: TAHI .110 .000 .000 .128 .000 .000 1.054 .000 .000
ncl0904g.snx: TAHI .110 .000 .000 .128 .000 .000 1.023 .000 .000
jpl0904g.snx: THU1 .110 .000 .000 .128 .000 .000 -.035 .000 .000
ncl0904g.snx: THU1 .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0904g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0904g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0904g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0904g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0904g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0904g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0904g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0904g.snx: XIAN .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0904g.snx: XIAN .110 .000 .000 .128 .000 .000 .384 .000 .000
jpl0904g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0904g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0904g.snx
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0904g.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 HART JPL-NCL Lat DAV1 JPL-NCL Lat KIT3 JPL-NCL
Lon WUHN JPL-NCL Lon TAIW MIT-JPL Lon IISC MIT-JPL
Lon TAIW MIT-NCL Hgt IISC JPL-NCL Hgt IISC MIT-JPL
45 GLOBAL STATIONS:
ALBH ALGO BOGT BRAZ BRMU CAS1 COCO CRO1 FAIR FLIN
FORT GOLD GUAM IRKT KELY KERG KOKB KOSG KOUR LHAS
MAC1 MADR MALI MATE MCM4 MDO1 METS NLIB NYAL OHIG
ONSA PERT POTS RCM6 REYK SANT SHAO STJO TIDB TSKB
WES2 WHIT WTZR YAR1 YELL
11 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG MADR SANT TIDB WTZR YAR1
YELL
AVERAGE COORDINATE RMS:
45 GLOBAL STATIONS 11 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.0 1.2 1.1 6.3 6.3 6.1
Lon 2.3 1.7 2.4 10.3 11.4 10.3
Hgt 4.7 6.7 5.5 12.4 13.7 12.8
3D 5.4 7.0 6.1 17.3 18.9 17.5
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
45 GLOBAL STATIONS 11 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.443 1.199 0.973 0.959 0.989 0.945
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 2.8 5.1 37.9 5.2 -39.1 7.9 -1.3 0.6
MIT -2.5 4.0 26.2 4.2 -11.1 4.7 -1.7 0.5
NCL 1.2 5.0 42.7 5.1 -26.1 6.8 -1.6 0.6
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0904g.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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