[IGSREPORT-3678] WK 0898 G-SNX Comparisons
AC
AC
Mon Apr 28 12:33:00 PDT 1997
******************************************************************************
IGS Electronic Report Mon Apr 28 12:33:00 PDT 1997 Message Number 3678
******************************************************************************
Author: AC Coordinator / NRCan GSDivision
Subject: WK 0898 G-SNX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0898
(MAR 23, 1997 - MAR 29, 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:
mit0898g.snx at cddis.gsfc.nasa.gov
jpl0898g.snx at cddis.gsfc.nasa.gov
ncl0898g.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))
jpl0898g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0898g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0898g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0898g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0898g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0898g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0898g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0898g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0898g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0898g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0898g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0898g.snx: GRAZ .110 .000 .000 .128 .000 .000 1.964 .000 .000
mit0898g.snx: GRAZ .078 .000 .000 .096 .000 .000 1.964 .000 .000
jpl0898g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0898g.snx: JOZE .069 .000 -.003 .068 -.003 -.001 .198 .000 .000
jpl0898g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
mit0898g.snx: MATE .078 .000 .000 .096 .000 .000 .101 .000 .000
ncl0898g.snx: MATE .110 .000 .000 .128 .000 .000 .101 .000 .000
jpl0898g.snx: MOIN .110 .000 .000 .128 .000 .000 -.103 .000 .000
mit0898g.snx: MOIN .110 .000 .000 .128 .000 .000 .994 .000 .000
jpl0898g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0898g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0898g.snx: NOTO .110 .000 .000 .128 .000 .000 -.035 .000 .000
mit0898g.snx: NOTO .110 .000 .000 .128 .000 .000 -.001 .000 .000
jpl0898g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0898g.snx: TAEJ .069 .002 -.001 .068 -.001 .002 .660 .000 .000
jpl0898g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0898g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0898g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0898g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0898g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0898g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0898g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0898g.snx: WHIT .110 .000 .000 .128 .000 .000 .100 .000 .000
mit0898g.snx: WHIT .110 .000 .000 .128 .000 .000 .010 .000 .000
jpl0898g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0898g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
ncl0898g.snx: YAR1 .000 .000 .000 .000 .000 .000 .073 .000 .000
jpl0898g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0898g.snx: ZIMM .069 .000 -.003 .068 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0898g.snx
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0898g.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 BAHR YAR1
CONFIDENCE LEVEL FOR OUTLIER DETECTION: 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat KIT3 JPL-NCL Lat KIT3 MIT-JPL Lon BRAZ JPL-NCL
Lon COCO JPL-NCL Lon HART MIT-JPL Lon MALI MIT-NCL
Lon HART MIT-NCL Hgt FORT MIT-JPL Hgt FORT MIT-NCL
36 GLOBAL STATIONS:
ALBH ALGO BRMU BRUS CAS1 DAV1 EISL FAIR GOLD GUAM
HOB2 KERG KOKB KOSG KOUR LHAS MAC1 MCM4 METS NYAL
OHIG ONSA PAMA PERT POTS RCM6 REYK SANT SHAO STJO
TAIW TIDB TSKB WTZR YAR1 YELL
10 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG SANT TIDB WTZR YAR1 YELL
AVERAGE COORDINATE RMS:
36 GLOBAL STATIONS 10 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.8 1.2 1.4 7.0 7.4 7.1
Lon 1.7 1.2 1.8 8.6 9.1 9.7
Hgt 3.3 3.6 3.8 8.8 8.0 9.3
3D 4.1 4.0 4.5 14.2 14.2 15.2
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
36 GLOBAL STATIONS 10 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.285 0.650 0.373 0.619 0.468 0.650
OFFSETS AND SCALE FACTOR WRT ITRF94 (FIDUCIAL STATIONS):
Tx (mm) STD(mm) Ty (mm) STD(mm) Tz (mm) STD(mm) Scale (ppb) STD(ppb)
------- ------- ------- ------- ------- ------- ----------- --------
JPL -4.1 5.0 10.1 5.2 -36.4 6.5 -2.3 0.6
MIT -5.9 4.2 8.8 4.3 -31.7 4.8 -2.0 0.6
NCL -1.5 4.7 8.2 4.8 -21.7 5.6 -2.2 0.6
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM mit0898g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM jpl0898g.snx :
Stations: TROM
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0898g.snx :
Stations: TROM
MADR WAS NOT USED IN GLOBAL COMPARISON DUE TO LARGE COORDINATE DIFFERENCES
WITH ITRF94, DESCRIBED BELOW:
STATION MADR HAS A LATITUDE DIFFERENCE WITH ITRF94 IN EXCESS OF 3 CM.
STATION / GNAAC / LATITUDE DIFFERENCE (mm.):
MADR JPL -38.9
STATION MADR HAS HEIGHT DIFFERENCES WITH ITRF94 IN EXCESS OF 3 CM.:
STATION / GNAAC / HEIGHT DIFFERENCE (mm.):
MADR JPL -62.4
MIT -34.5
--
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