[IGSREPORT-3838] Wk 0903 G-SINEX Comparisons
AC
AC
Thu Jun 12 11:27:17 PDT 1997
******************************************************************************
IGS Electronic Report Thu Jun 12 11:27:17 PDT 1997 Message Number 3838
******************************************************************************
Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0903 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0903
(APR 27, 1997 - MAY 3, 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:
mit0903g.snx at cddis.gsfc.nasa.gov
jpl0903g.snx at cddis.gsfc.nasa.gov
ncl0903g.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))
jpl0903g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0903g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
ncl0903g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0903g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0903g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
ncl0903g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0903g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0903g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0903g.snx: CASA .110 .000 .000 .128 .000 .000 .001 .000 .000
mit0903g.snx: CASA .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0903g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0903g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0903g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0903g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0903g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0903g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0903g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0903g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0903g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0903g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0903g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
jpl0903g.snx: TAHI .110 .000 .000 .128 .000 .000 7.790 .000 .000
mit0903g.snx: TAHI .110 .000 .000 .128 .000 .000 1.054 .000 .000
ncl0903g.snx: TAHI .110 .000 .000 .128 .000 .000 1.023 .000 .000
jpl0903g.snx: THU1 .110 .000 .000 .128 .000 .000 -.035 .000 .000
ncl0903g.snx: THU1 .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0903g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0903g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0903g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0903g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0903g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0903g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0903g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0903g.snx: XIAN .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0903g.snx: XIAN .110 .000 .000 .128 .000 .000 .384 .000 .000
jpl0903g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0903g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0903g.snx
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0903g.snx
ASC1 Missing Antenna
AUCK Missing Antenna
CHAT Missing Antenna
DGAR Missing Antenna
KIRU Missing Antenna
KWJ1 Missing Antenna
MKEA Missing Antenna
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: ASC1 AUCK CHAT DGAR KIRU KWJ1 MKEA
CONFIDENCE LEVEL FOR OUTLIER DETECTION: 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat BOGT MIT-JPL Lon GUAM JPL-NCL Lon IISC JPL-NCL
Lon GUAM MIT-JPL Lon IISC MIT-JPL Hgt IISC JPL-NCL
Hgt IISC MIT-JPL
50 GLOBAL STATIONS:
ALBH ALGO BOR1 BRAZ BRMU BRUS CAS1 COCO CRO1 DAV1
FAIR FLIN FORT GOLD HART IRKT KELY KERG KIT3 KOKB
KOSG KOUR LHAS MAC1 MALI MATE MCM4 MDO1 METS NLIB
NYAL OHIG ONSA PERT POTS RCM6 REYK SANT SHAO STJO
TAIW TIDB TSKB WES2 WHIT WTZR WUHN YAR1 YELL ZWEN
11 FIDUCIAL STATIONS:
ALGO FAIR GOLD HART KOKB KOSG SANT TIDB WTZR YAR1
YELL
AVERAGE COORDINATE RMS:
50 GLOBAL STATIONS 11 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.6 0.8 1.1 6.0 6.5 6.3
Lon 1.7 1.0 1.6 7.1 7.0 7.3
Hgt 4.6 5.7 2.9 10.3 9.7 10.0
3D 5.1 5.8 3.5 13.9 13.6 13.9
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
50 GLOBAL STATIONS 11 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.144 1.047 0.353 0.607 0.474 0.542
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 -1.8 5.2 22.8 5.4 -36.1 8.1 -1.7 0.6
MIT -2.7 3.9 13.8 4.0 -24.3 4.4 -1.9 0.6
NCL -0.8 4.9 23.3 5.0 -27.2 7.1 -1.6 0.6
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0903g.snx :
Stations: MADR 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>]
More information about the IGSREPORT
mailing list