[IGSREPORT-4682] Wk 0945 G-SINEX Comparisons
AC
AC
Tue Mar 10 07:12:27 PST 1998
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IGS Electronic Report Tue Mar 10 7:12:27 PST 1998 Message Number 4682
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0945 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0945
(FEB 15, 1998 - FEB 21, 1998)
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:
mit0945g.snx at cddis.gsfc.nasa.gov
jpl0945g.snx at cddis.gsfc.nasa.gov
ncl0945g.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))
jpl0945g.snx: BISH .075 .002 -.001 .069 -.001 .002 .046 .000 .000
mit0945g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
- Unresolvable (no log file)
jpl0945g.snx: ELAT .069 .000 .000 .068 .000 .000 -.011 .000 .000
mit0945g.snx: ELAT .078 .000 -.003 .074 -.003 -.001 -.011 .000 .000
- Unresolvable (no log file)
jpl0945g.snx: KATZ .069 .000 .000 .068 .000 .000 -.012 .000 .000
mit0945g.snx: KATZ .078 .000 -.003 .074 -.003 -.001 -.012 .000 .000
- Unresolvable (no log file)
jpl0945g.snx: KOUR .078 .000 .000 .096 .000 .000 .132 .000 .000
mit0945g.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.
jpl0945g.snx: MALI .078 .000 .000 .096 .000 .000 .222 .000 .000
mit0945g.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.
jpl0945g.snx: TELA .069 .000 .000 .068 .000 .000 .000 .000 .000
mit0945g.snx: TELA .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable (no log file)
jpl0945g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
mit0945g.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.
jpl0945g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0945g.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.
jpl0945g.snx: HARK .110 .000 .000 .128 .000 .000 9.754 .000 .000
jpl0945g.snx: HOFN .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0945g.snx: HRAO .110 .000 .000 .128 .000 .000 9.754 .000 .000
ncl0945g.snx: MDVO Antenna missing .146 .000 .000
jpl0945g.snx: NICO .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0945g.snx: SELE .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0945g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0945g.snx: ZECK .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0945g.snx: ZIMM .069 .000 .000 .068 .000 .000 .000 .000 .000
FILE ncl0945g.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 MAS1 MIT-JPL Lat MAS1 MIT-NCL Lon KWJ1 MIT-JPL
Lon TAEJ MIT-JPL Lon SHAO MIT-JPL Lon FORT MIT-JPL
Lon IISC MIT-JPL Hgt NTUS MIT-JPL Hgt NTUS MIT-NCL
Hgt KWJ1 MIT-NCL Hgt TSKB MIT-NCL
59 GLOBAL STATIONS:
ALBH ALGO ANKR AREQ ASC1 AUCK BAHR BOR1 BRMU BRUS
CAS1 CHAT COCO CRO1 DAV1 DGAR DRAO EISL FAIR GOLD
GUAM HOB2 IRKT KELY KERG KIRU KIT3 KOKB KOSG LHAS
MAC1 MADR MATE MDO1 METS MKEA NLIB NRC1 NYAL OHIG
ONSA PERT POL2 POTS RCM6 REYK SANT STJO TAHI TIDB
USUD VILL WES2 WHIT WSRT WTZR YAR1 YELL ZWEN
11 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG MADR SANT TIDB WTZR YAR1
YELL
AVERAGE COORDINATE RMS USING ITRF94:
59 GLOBAL STATIONS 11 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.0 1.0 0.6 8.5 8.7 8.6
Lon 1.4 1.3 0.9 9.6 9.3 9.2
Hgt 2.1 2.1 2.0 9.8 9.9 10.2
3D 2.7 2.6 2.3 16.1 16.1 16.2
VARIANCE FACTORS WITH ITRF94 (CHI-SQUARE / (DEGREES OF FREEDOM)):
59 GLOBAL STATIONS 11 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.076 0.304 0.178 2.019 1.552 1.834
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 -4.8 4.1 29.5 4.3 -1.9 6.0 -0.6 0.4
MIT -2.3 3.0 5.1 3.0 -1.8 3.7 -0.8 0.4
NCL -3.6 4.2 21.2 4.3 4.4 6.1 -0.6 0.4
REMARKS:
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM mit0945g.snx :
Stations: HART TROM
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM jpl0945g.snx :
Stations: TROM
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM ncl0945g.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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