[IGSREPORT-4558] Wk 0929 G-SINEX Comparisons
AC
AC
Mon Feb 2 12:52:10 PST 1998
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IGS Electronic Report Mon Feb 2 12:52:10 PST 1998 Message Number 4558
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0929 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0929
(OCT 26, 1997 - NOV 1, 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:
mit0929g.snx at cddis.gsfc.nasa.gov
jpl0929g.snx at cddis.gsfc.nasa.gov
ncl0929g.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))
jpl0929g.snx: BISH .075 .002 -.001 .069 -.001 .002 .046 .000 .000
mit0929g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
- Unresolvable (no log file)
jpl0929g.snx: ELAT .069 .000 .000 .068 .000 .000 -.011 .000 .000
mit0929g.snx: ELAT .078 .000 -.003 .074 -.003 -.001 -.011 .000 .000
- Unresolvable (no log file)
jpl0929g.snx: HARK .110 .000 .000 .128 .000 .000 9.754 .000 .000
mit0929g.snx: HARK .078 .000 .000 .096 .000 .000 9.803 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 9.8030 M.
jpl0929g.snx: KATZ .069 .000 .000 .068 .000 .000 -.012 .000 .000
mit0929g.snx: KATZ .078 .000 -.003 .074 -.003 -.001 -.012 .000 .000
- Unresolvable (no log file)
jpl0929g.snx: KOUR .078 .000 .000 .096 .000 .000 .132 .000 .000
mit0929g.snx: KOUR .110 .000 .000 .128 .000 .000 .045 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.045 M.
jpl0929g.snx: MALI .078 .000 .000 .096 .000 .000 .222 .000 .000
mit0929g.snx: MALI .110 .000 .000 .128 .000 .000 .100 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.135 M.
jpl0929g.snx: TELA .069 .000 .000 .068 .000 .000 .000 .000 .000
mit0929g.snx: TELA .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable (no log file)
jpl0929g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
mit0929g.snx: WUHN .110 .000 .000 .128 .000 .000 2.285 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 2.355 M.
jpl0929g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0929g.snx: YAR1 .078 .000 .000 .096 .000 .000 .081 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.081 M.
ncl0929g.snx: FORT .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0929g.snx: LPGS .110 .000 .000 .128 .000 .000 .000 .000 .000
ncl0929g.snx: MDVO Antenna missing. .146 .000 .000
jpl0929g.snx: NICO .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0929g.snx: SELE .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0929g.snx: ZECK .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0929g.snx: ZIMM .069 .000 .000 .068 .000 .000 .000 .000 .000
FILE ncl0929g.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 KERG MIT-JPL Lat CAS1 MIT-JPL Lat COCO MIT-JPL
Lat TAEJ MIT-JPL Lat KERG MIT-NCL Lat CAS1 MIT-NCL
Lon NTUS MIT-JPL Lon MADR MIT-JPL Lon NTUS MIT-NCL
Lon MADR MIT-NCL Lon AUCK MIT-NCL Hgt CAS1 MIT-JPL
Hgt TAEJ MIT-JPL Hgt CAS1 MIT-NCL Hgt TAEJ MIT-NCL
59 GLOBAL STATIONS:
ALBH ALGO ANKR AREQ ASC1 BAHR BOR1 BRMU BRUS CHAT
CRO1 DGAR DRAO FAIR FLIN GOLD GUAM HOB2 IISC IRKT
KELY KIRU KIT3 KOKB KOSG KSTU KWJ1 LHAS MAC1 MAS1
MATE MCM4 MDO1 METS MKEA NLIB NRC1 ONSA PERT POL2
POTS RCM6 REYK SANT SHAO STJO TAHI THU1 TIDB TSKB
USUD VILL WES2 WHIT WSRT WTZR YAR1 YELL ZWEN
10 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG SANT TIDB WTZR YAR1 YELL
AVERAGE COORDINATE RMS USING ITRF94:
59 GLOBAL STATIONS 10 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.4 1.1 0.7 6.6 7.3 6.9
Lon 1.9 1.9 0.6 7.9 7.9 7.8
Hgt 5.5 5.8 1.1 9.6 8.9 8.9
3D 6.0 6.2 1.5 14.1 13.9 13.8
VARIANCE FACTORS WITH ITRF94 (CHI-SQUARE / (DEGREES OF FREEDOM)):
59 GLOBAL STATIONS 10 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.049 1.873 0.947 1.384 1.140 1.028
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 -7.7 4.8 2.1 4.9 -28.2 6.3 -1.5 0.4
MIT -7.7 2.9 0.5 3.0 -36.6 3.6 -1.0 0.4
NCL -6.5 4.5 8.2 4.5 -23.6 6.7 -1.5 0.4
REMARKS:
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM mit0929g.snx :
Stations: HART TROM
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM jpl0929g.snx :
Stations: TROM
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM ncl0929g.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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