[IGSREPORT-3840] Wk 0906 G-SINEX Comparisons
AC
AC
Thu Jun 12 11:29:56 PDT 1997
******************************************************************************
IGS Electronic Report Thu Jun 12 11:29:56 PDT 1997 Message Number 3840
******************************************************************************
Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0906 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0906
(MAY 18, 1997 - MAY 24, 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:
mit0906g.snx at cddis.gsfc.nasa.gov
jpl0906g.snx at cddis.gsfc.nasa.gov
ncl0906g.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))
jpl0906g.snx: ANKR .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0906g.snx: ANKR .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0906g.snx: BAHR .000 .000 .000 .000 .000 .000 3.122 .000 .000
mit0906g.snx: BAHR .110 .000 .000 .128 .000 .000 3.122 .000 .000
jpl0906g.snx: BISH .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0906g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0906g.snx: CASA .110 .000 .000 .128 .000 .000 .001 .000 .000
mit0906g.snx: CASA .110 .000 .000 .128 .000 .000 .060 .000 .000
jpl0906g.snx: DRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0906g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
ncl0906g.snx: DRAO .110 .000 .000 .128 .000 .000 .100 .000 .000
jpl0906g.snx: GOPE .070 .000 .000 .068 .000 .000 .046 .000 .000
mit0906g.snx: GOPE .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
jpl0906g.snx: JOZE .070 .000 .000 .068 .000 .000 .198 .000 .000
mit0906g.snx: JOZE .078 .000 -.003 .074 -.003 -.001 .198 .000 .000
jpl0906g.snx: MOIN .110 .000 .000 .128 .000 .000 -.103 .000 .000
mit0906g.snx: MOIN .110 .000 .000 .128 .000 .000 .994 .000 .000
jpl0906g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0906g.snx: MONP .110 .000 .000 .128 .000 .000 .119 .000 .000
jpl0906g.snx: NOTO .110 .000 .000 .128 .000 .000 -.035 .000 .000
mit0906g.snx: NOTO .110 .000 .000 .128 .000 .000 -.001 .000 .000
jpl0906g.snx: TAEJ .000 .000 .000 .000 .000 .000 .660 .000 .000
mit0906g.snx: TAEJ .075 .002 -.001 .069 -.001 .002 .660 .000 .000
jpl0906g.snx: TAHI .110 .000 .000 .128 .000 .000 7.790 .000 .000
mit0906g.snx: TAHI .110 .000 .000 .128 .000 .000 1.055 .000 .000
ncl0906g.snx: TAHI .110 .000 .000 .128 .000 .000 1.023 .000 .000
jpl0906g.snx: THU1 .110 .000 .000 .128 .000 .000 -.035 .000 .000
ncl0906g.snx: THU1 .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0906g.snx: UPAD .070 .000 .000 .068 .000 .000 1.962 .000 .000
mit0906g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0906g.snx: UPO1 .110 .000 .000 .128 .000 .000 .078 .000 .000
mit0906g.snx: UPO1 .092 -.001 .000 .060 .000 -.001 .000 .000 .000
jpl0906g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
mit0906g.snx: USUD .078 .000 .000 .096 .000 .000 -.035 .000 .000
ncl0906g.snx: USUD .110 .000 .000 .128 .000 .000 -.035 .000 .000
jpl0906g.snx: XIAN .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0906g.snx: XIAN .110 .000 .000 .128 .000 .000 .384 .000 .000
jpl0906g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0906g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
ncl0906g.snx: YAR1 .000 .000 .000 .000 .000 .000 .073 .000 .000
jpl0906g.snx: ZIMM .070 .000 .000 .068 .000 .000 .000 .000 .000
mit0906g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0906g.snx
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MDVO
ANTENNA PHASE CENTRE CONFLICTS IN FILE ncl0906g.snx
ASC1 Missing Antenna
CHAT Missing Antenna
DGAR Missing Antenna
KWJ1 Missing Antenna
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: ASC1 CHAT DGAR KWJ1 BAHR YAR1
CONFIDENCE LEVEL FOR OUTLIER DETECTION: 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat KIT3 JPL-NCL Lat DAV1 MIT-NCL Lon IISC MIT-JPL
Lon CAS1 MIT-NCL Hgt IISC JPL-NCL Hgt IISC MIT-JPL
40 GLOBAL STATIONS:
ALGO BOGT BRAZ BRMU COCO CRO1 FAIR FORT GOLD GUAM
HART HOB2 IRKT KERG KOKB KOSG LHAS MAC1 MALI MATE
MCM4 MDO1 METS NLIB NYAL OHIG ONSA RCM6 REYK SANT
STJO TAIW TIDB TSKB WES2 WHIT WTZR WUHN YAR1 YELL
11 FIDUCIAL STATIONS:
ALGO FAIR GOLD HART KOKB KOSG SANT TIDB WTZR YAR1
YELL
AVERAGE COORDINATE RMS:
40 GLOBAL STATIONS 11 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 2.0 1.5 1.9 6.3 6.7 6.1
Lon 3.2 1.4 2.9 8.2 8.4 8.1
Hgt 4.3 3.8 4.1 11.5 10.6 11.2
3D 5.7 4.3 5.4 15.5 15.1 15.1
VARIANCE FACTORS (CHI-SQUARE / (DEGREES OF FREEDOM)):
40 GLOBAL STATIONS 11 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.386 0.985 0.362 0.742 0.547 0.653
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 -0.6 5.3 30.7 5.4 -37.4 8.0 -2.0 0.6
MIT -4.4 4.2 22.8 4.3 -25.5 4.8 -2.1 0.6
NCL -2.6 5.2 35.7 5.4 -23.8 6.6 -1.9 0.6
REMARKS:
THE FOLLOWING FIDUCIAL STATIONS ARE MISSING FROM ncl0906g.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 -23.1
MIT -21.8
NCL -27.9
--
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