[IGSREPORT-3884] Wk 0907 G-SINEX Comparisons
AC
AC
Fri Jun 27 08:07:01 PDT 1997
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IGS Electronic Report Fri Jun 27 8:07:01 PDT 1997 Message Number 3884
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0907 G-SINEX Comparisons
Subject: Wk 0907 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0907
(MAY 25, 1997 - MAY 31, 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:
mit0907g.snx at cddis.gsfc.nasa.gov
jpl0907g.snx at cddis.gsfc.nasa.gov
ncl0907g.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))
jpl0907g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0907g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0907g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0907g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0907g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
ncl0907g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0907g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0907g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0907g.snx: CASA .110 .000 .000 .128 .000 .000 .001 .000 .000
mit0907g.snx: CASA .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0907g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0907g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0907g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0907g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0907g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0907g.snx: HARN .110 .000 .000 .128 .000 .000 9.754 .000 .000
mit0907g.snx: HARN .078 .000 .000 .096 .000 .000 9.754 .000 .000
jpl0907g.snx: HART .110 .000 .000 .128 .000 .000 9.754 .000 .000
mit0907g.snx: HART .078 .000 .000 .096 .000 .000 9.754 .000 .000
ncl0907g.snx: HART .110 .000 .000 .128 .000 .000 9.754 .000 .000
jpl0907g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0907g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0907g.snx: MOIN .110 .000 .000 .128 .000 .000 -.103 .000 .000
mit0907g.snx: MOIN .110 .000 .000 .128 .000 .000 .994 .000 .000
jpl0907g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0907g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0907g.snx: NOTO .110 .000 .000 .128 .000 .000 -.035 .000 .000
mit0907g.snx: NOTO .110 .000 .000 .128 .000 .000 -.001 .000 .000
jpl0907g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0907g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
ncl0907g.snx: TAEJ .078 .000 -.003 .074 -.003 -.001 .660 .000 .000
jpl0907g.snx: TAHI .110 .000 .000 .128 .000 .000 7.790 .000 .000
mit0907g.snx: TAHI .110 .000 .000 .128 .000 .000 1.054 .000 .000
ncl0907g.snx: TAHI .110 .000 .000 .128 .000 .000 1.023 .000 .000
jpl0907g.snx: THU1 .110 .000 .000 .128 .000 .000 -.035 .000 .000
ncl0907g.snx: THU1 .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0907g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0907g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0907g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0907g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0907g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0907g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0907g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0907g.snx: XIAN .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0907g.snx: XIAN .110 .000 .000 .128 .000 .000 .384 .000 .000
jpl0907g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0907g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0907g.snx
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0907g.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):
Lat HART JPL-NCL Lat CAS1 MIT-NCL Lon SHAO JPL-NCL
Lon HART JPL-NCL Lon SHAO MIT-NCL Lon HART MIT-NCL
Hgt CRO1 JPL-NCL Hgt HART JPL-NCL Hgt CRO1 MIT-NCL
Hgt HART MIT-NCL
39 GLOBAL STATIONS:
ALGO BOGT BRAZ BRMU COCO DAV1 FAIR FORT GOLD GUAM
HOB2 IISC IRKT KERG KIT3 KOKB KOSG LHAS MAC1 MALI
MATE MCM4 MDO1 METS NLIB NYAL OHIG RCM6 REYK SANT
STJO TAIW TIDB TSKB WES2 WTZR WUHN YAR1 YELL
10 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG SANT TIDB WTZR YAR1 YELL
AVERAGE COORDINATE RMS:
39 GLOBAL STATIONS 10 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.7 2.4 1.9 5.7 5.9 5.1
Lon 2.1 3.0 2.6 6.8 6.8 6.2
Hgt 4.2 5.5 4.7 10.7 9.5 11.0
3D 5.0 6.7 5.7 13.9 13.1 13.6
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
39 GLOBAL STATIONS 10 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.434 0.893 0.837 1.463 0.745 1.150
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 -2.0 4.4 25.2 4.5 -43.1 7.3 -1.8 0.4
MIT -3.3 3.0 17.9 3.1 -37.0 4.0 -1.7 0.4
NCL 0.9 4.2 23.4 4.4 -25.3 6.1 -2.0 0.4
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM jpl0907g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0907g.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 -30.4
MIT -30.7
NCL -32.4
--
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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