[IGSREPORT-4566] Wk 0932 G-SINEX Comparisons
AC
AC
Tue Feb 3 09:47:09 PST 1998
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IGS Electronic Report Tue Feb 3 9:47:09 PST 1998 Message Number 4566
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0932 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0932
(NOV 16, 1997 - NOV 22, 1997)
Contacts: J. Kouba (kouba at geod.emr.ca)
D. Hutchison (hutch at geod.emr.ca)
R. Ferland (ferland 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:
mit0932g.snx at cddis.gsfc.nasa.gov
jpl0932g.snx at cddis.gsfc.nasa.gov
ncl0932g.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))
jpl0932g.snx: BISH .075 .002 -.001 .069 -.001 .002 .046 .000 .000
mit0932g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
- Unresolvable (no log file)
jpl0932g.snx: ELAT .069 .000 .000 .068 .000 .000 -.011 .000 .000
mit0932g.snx: ELAT .078 .000 -.003 .074 -.003 -.001 -.011 .000 .000
- Unresolvable (no log file)
jpl0932g.snx: HARK .110 .000 .000 .128 .000 .000 9.754 .000 .000
mit0932g.snx: HARK .110 .000 .000 .128 .000 .000 9.803 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 9.8030 M.
jpl0932g.snx: KATZ .069 .000 .000 .068 .000 .000 -.012 .000 .000
mit0932g.snx: KATZ .078 .000 -.003 .074 -.003 -.001 -.012 .000 .000
- Unresolvable (no log file)
jpl0932g.snx: KOUR .078 .000 .000 .096 .000 .000 .132 .000 .000
mit0932g.snx: KOUR .078 .000 .000 .096 .000 .000 .045 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.045 M.
jpl0932g.snx: MALI .078 .000 .000 .096 .000 .000 .222 .000 .000
mit0932g.snx: MALI .078 .000 .000 .096 .000 .000 .135 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.135 M.
jpl0932g.snx: TELA .069 .000 .000 .068 .000 .000 .000 .000 .000
mit0932g.snx: TELA .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable (no log file)
jpl0932g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
mit0932g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 2.355 M.
jpl0932g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0932g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.081 M.
ncl0932g.snx: MDVO Antenna missing. .146 .000 .000
jpl0932g.snx: MOIN .110 .000 .000 .128 .000 .000 .994 .000 .000
jpl0932g.snx: NICO .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0932g.snx: SELE .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0932g.snx: HOFN .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0932g.snx: LPGS .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0932g.snx: ZECK .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0932g.snx: ZIMM .069 .000 .000 .068 .000 .000 .000 .000 .000
FILE ncl0932g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
CONFIDENCE LEVEL FOR OUTLIER DETECTION (ITRF94): 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat OHIG MIT-JPL Lat ASC1 MIT-NCL Lat KERG MIT-NCL
Lat FORT MIT-NCL Lat AREQ MIT-NCL Lat SANT MIT-NCL
Lat OHIG MIT-NCL Lat BRAZ MIT-NCL Lon FORT MIT-JPL
Lon AUCK MIT-JPL Lon FORT MIT-NCL Lon AUCK MIT-NCL
Hgt MAS1 MIT-JPL Hgt MCM4 MIT-JPL Hgt FORT MIT-JPL
Hgt MAS1 MIT-NCL Hgt FORT MIT-NCL
58 GLOBAL STATIONS:
ALBH ALGO ANKR BAHR BOR1 BRMU CAS1 CHAT COCO CRO1
DGAR DRAO EISL FAIR FLIN GOLD GUAM HOB2 IISC IRKT
KELY KIRU KIT3 KOKB KOSG KSTU KWJ1 LHAS MAC1 MADR
MATE MDO1 METS MKEA NLIB NTUS ONSA PERT POL2 POTS
RCM6 REYK SHAO STJO TAEJ TAIW THU1 TIDB TSKB USUD
VILL WES2 WHIT WSRT WTZR YAR1 YELL ZWEN
10 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG MADR TIDB WTZR YAR1 YELL
AVERAGE COORDINATE RMS USING ITRF94:
58 GLOBAL STATIONS 10 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.3 1.5 0.7 7.8 8.2 8.0
Lon 1.7 1.4 0.8 10.6 10.1 9.9
Hgt 2.9 2.5 1.3 11.5 11.3 10.9
3D 3.6 3.2 1.7 17.5 17.2 16.8
VARIANCE FACTORS WITH ITRF94 (CHI-SQUARE / (DEGREES OF FREEDOM)):
58 GLOBAL STATIONS 10 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.075 0.783 0.507 2.713 2.054 2.135
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 4.1 4.5 -2.8 4.8 30.1 6.4 -2.3 0.4
MIT 7.6 2.8 -4.2 3.0 22.6 3.3 -2.1 0.4
NCL 4.0 4.4 2.1 4.7 31.1 6.6 -1.9 0.4
REMARKS:
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM mit0932g.snx :
Stations: HART TROM
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM jpl0932g.snx :
Stations: TROM
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM ncl0932g.snx :
Stations: HART 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>]
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