[IGSREPORT-4212] Wk 0922 G-SINEX Comparisons, Retransmission
AC
AC
Wed Oct 8 12:42:13 PDT 1997
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IGS Electronic Report Wed Oct 8 12:42:13 PDT 1997 Message Number 4212
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0922 G-SINEX Comparisons, Retransmission
Comparison of GNAAC Combined SINEX Solutions - Week 0922
(SEP 7, 1997 - SEP 13, 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:
mit0922g.snx at cddis.gsfc.nasa.gov
jpl0922g.snx at cddis.gsfc.nasa.gov
ncl0922g.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))
jpl0922g.snx: BISH .075 .002 -.001 .069 -.001 .002 .046 .000 .000
mit0922g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0922g.snx: ELAT .069 .000 .000 .068 .000 .000 -.011 .000 .000
mit0922g.snx: ELAT .078 .000 -.003 .074 -.003 -.001 -.011 .000 .000
jpl0922g.snx: GALA .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0922g.snx: GALA .110 .000 .000 .128 .000 .000 .082 .000 .000
jpl0922g.snx: HARK .110 .000 .000 .128 .000 .000 9.754 .000 .000
mit0922g.snx: HARK .110 .000 .000 .128 .000 .000 9.803 .000 .000
ncl0922g.snx: HARK .110 .000 .000 .128 .000 .000 9.803 .000 .000
jpl0922g.snx: KATZ .069 .000 .000 .068 .000 .000 -.012 .000 .000
mit0922g.snx: KATZ .078 .000 -.003 .074 -.003 -.001 -.012 .000 .000
jpl0922g.snx: LPGS .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0922g.snx: LPGS .110 .000 .000 .128 .000 .000 .046 .000 .000
ncl0922g.snx: LPGS .110 .000 .000 .128 .000 .000 .046 .000 .000
jpl0922g.snx: MDVO .078 .000 -.003 .074 -.003 -.001 .146 .000 .000
mit0922g.snx: MDVO .078 -.001 -.003 .074 -.003 -.001 .132 -.005 .006
ncl0922g.snx: MDVO .078 .000 -.003 .074 -.003 -.001 .149 .000 .000
jpl0922g.snx: NICO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0922g.snx: NICO .110 .000 .000 .128 .000 .000 .050 .000 .000
jpl0922g.snx: SELE .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0922g.snx: SELE .110 .000 .000 .128 .000 .000 .091 .000 .000
jpl0922g.snx: TAEJ .075 .002 -.001 .069 -.001 .002 .660 .000 .000
mit0922g.snx: TAEJ .075 .002 -.001 .069 -.001 .002 .660 .000 .000
ncl0922g.snx: TAEJ .078 .000 -.003 .074 -.003 -.001 .660 .000 .000
jpl0922g.snx: TELA .069 .000 .000 .068 .000 .000 .000 .000 .000
mit0922g.snx: TELA .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
jpl0922g.snx: ZIMM .069 .000 .000 .068 .000 .000 .000 .000 .000
mit0922g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0922g.snx
KSTU Multiple Sites
ZWEN Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: KSTU ZWEN
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0922g.snx
ASC1 Missing Antenna
AUCK Missing Antenna
CHAT Missing Antenna
DGAR Missing Antenna
KIRU Missing Antenna
KWJ1 Missing Antenna
MKEA Missing Antenna
VILL Missing Antenna
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: ASC1 AUCK CHAT DGAR KIRU KWJ1 MKEA VILL
CONFIDENCE LEVEL FOR OUTLIER DETECTION: 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat BRAZ MIT-JPL Lat SANT MIT-JPL Lat FORT MIT-JPL
Lat AREQ MIT-JPL Lat KOUR MIT-JPL Lon MALI MIT-JPL
Lon MADR MIT-NCL Lon IISC MIT-NCL Hgt CAS1 JPL-NCL
Hgt MCM4 JPL-NCL Hgt MCM4 MIT-JPL Hgt CAS1 MIT-JPL
Hgt MCM4 MIT-NCL Hgt CAS1 MIT-NCL
42 GLOBAL STATIONS:
ALBH ALGO ANKR BAHR BOR1 BRMU CRO1 DRAO FAIR FLIN
GOLD GUAM HOB2 IRKT KELY KERG KIT3 KOKB KOSG LHAS
MAC1 MATE MDO1 METS NLIB ONSA PERT POTS RCM6 REYK
SHAO STJO TAHI TAIW TIDB TSKB USUD WES2 WHIT WTZR
WUHN YELL
8 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG TIDB WTZR YELL
AVERAGE COORDINATE RMS:
42 GLOBAL STATIONS 8 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.0 0.7 0.7 4.7 5.0 4.7
Lon 1.0 1.2 0.8 7.9 8.2 8.2
Hgt 3.3 3.3 1.4 9.0 8.9 9.6
3D 3.6 3.5 1.8 12.8 13.1 13.5
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
42 GLOBAL STATIONS 8 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.049 0.764 0.182 0.850 0.679 0.725
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 1.4 4.7 14.6 5.2 -28.4 6.5 -2.3 0.5
MIT 0.5 3.4 11.9 4.0 -36.4 4.0 -2.1 0.5
NCL 0.9 5.0 20.1 5.5 -35.5 7.4 -2.3 0.5
REMARKS:
FOR THE FILE mit0922g.snx, THE A PRIORI COVARIANCE MATRIX WAS SCALED UPWARD
(ALL ELEMENTS) BY A FACTOR OF 0.05% PRIOR TO DECONSTRAINING.
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM mit0922g.snx :
Stations: HART TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM jpl0922g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0922g.snx :
Stations: HART TROM YAR1
--
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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