[IGSREPORT-4738] Wk 0947 G-SINEX Comparisons
AC
AC
Wed Mar 25 08:34:04 PST 1998
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IGS Electronic Report Wed Mar 25 8:34:04 PST 1998 Message Number 4738
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0947 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0947
(MAR 1, 1998 - MAR 7, 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 47 ITRF96 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:
mit0947g.snx at cddis.gsfc.nasa.gov
jpl0947g.snx at cddis.gsfc.nasa.gov
ncl0947g.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))
jpl0947g.snx: BISH .075 .002 -.001 .069 -.001 .002 .046 .000 .000
mit0947g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
- Unresolvable (no log file)
jpl0947g.snx: CAGL .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0947g.snx: CAGL .110 .000 .000 .128 .000 .000 .010 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.045 M.
jpl0947g.snx: ELAT .069 .000 .000 .068 .000 .000 -.011 .000 .000
mit0947g.snx: ELAT .078 .000 -.003 .074 -.003 -.001 -.011 .000 .000
- Unresolvable (no log file)
jpl0947g.snx: MALI .078 .000 .000 .096 .000 .000 .222 .000 .000
mit0947g.snx: MALI .078 .000 .000 .096 .000 .000 .167 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.135 M.
jpl0947g.snx: MOIN .110 .000 .000 .128 .000 .000 .994 .000 .000
mit0947g.snx: MOIN .110 .000 .000 .128 .000 .000 .274 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.086 M.
jpl0947g.snx: NOUM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
mit0947g.snx: NOUM .075 .002 -.001 .069 -.001 .002 .000 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.000 M.
jpl0947g.snx: TELA .069 .000 .000 .068 .000 .000 .000 .000 .000
mit0947g.snx: TELA .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable (no log file)
jpl0947g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
mit0947g.snx: WUHN .110 .000 .000 .128 .000 .000 2.356 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 2.355 M.
jpl0947g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0947g.snx: YAR1 .078 .000 .000 .096 .000 .000 .114 .000 .000
- Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.081 M.
jpl0947g.snx: HARK .110 .000 .000 .128 .000 .000 9.754 .000 .000
jpl0947g.snx: HART .110 .000 .000 .128 .000 .000 9.754 .000 .000
jpl0947g.snx: HARV .110 .000 .000 .128 .000 .000 .061 .000 .000
jpl0947g.snx: HOFN .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0947g.snx: HRAO .110 .000 .000 .128 .000 .000 9.754 .000 .000
jpl0947g.snx: KOUR .078 .000 .000 .096 .000 .000 .132 .000 .000
jpl0947g.snx: LPGS .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0947g.snx: NICO .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0947g.snx: SELE .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0947g.snx: SFER .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0947g.snx: SOFI .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0947g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0947g.snx: ZECK .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0947g.snx: ZIMM .069 .000 .000 .068 .000 .000 .000 .000 .000
FILE ncl0947g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0947g.snx
AREQ Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: AREQ
CONFIDENCE LEVEL FOR OUTLIER DETECTION (ITRF96): 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat ANKR JPL-NCL Lat ANKR MIT-JPL Lon RCM6 JPL-NCL
Lon DGAR JPL-NCL Lon ANKR JPL-NCL Lon ANKR MIT-JPL
Hgt BOGT MIT-JPL Hgt FORT MIT-JPL Hgt SANT MIT-NCL
Hgt BOGT MIT-NCL
60 GLOBAL STATIONS:
ALGO ASC1 AUCK BAHR BRMU BRUS CAS1 CHAT COCO CRO1
DAV1 DRAO EISL FAIR GODE GOLD GRAZ GUAM HOB2 IISC
IRKT KELY KERG KIRU KIT3 KOKB KOSG KWJ1 LHAS MAC1
MADR MATE MCM4 MDO1 METS MKEA NLIB OHIG ONSA PERT
PIE1 POL2 POTS REYK SHAO STJO TAEJ TAHI THU1 TIDB
TSKB USNO USUD WES2 WHIT WSRT WTZR YAR1 YELL ZWEN
38 FIDUCIAL STATIONS:
ALGO BRMU DAV1 DRAO FAIR FORT GODE GOLD GRAZ GUAM
HOB2 IRKT KERG KIT3 KOKB KOSG KWJ1 LHAS MAC1 MADR
MATE MDO1 NLIB OHIG ONSA PERT PIE1 POTS SANT SHAO
THU1 TIDB TSKB WES2 WTZR YAR1 YELL ZWEN
AVERAGE COORDINATE RMS USING ITRF96:
60 GLOBAL STATIONS 38 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.4 1.0 0.8 3.5 4.1 3.6
Lon 1.4 1.1 1.1 5.0 5.4 4.7
Hgt 3.1 3.0 2.2 8.4 8.7 8.0
3D 3.7 3.4 2.6 10.4 11.1 9.9
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
60 GLOBAL STATIONS 38 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.150 0.589 0.290 2.929 2.827 2.043
OFFSETS AND SCALE FACTOR WRT ITRF96 (FIDUCIAL STATIONS):
(TRANSFORMATION FROM ITRF96 TO GNAAC SINEX FILES)
Tx (mm) STD(mm) Ty (mm) STD(mm) Tz (mm) STD(mm) Scale (ppb) STD(ppb)
------- ------- ------- ------- ------- ------- ----------- --------
JPL -2.2 2.9 21.7 2.9 -6.8 4.8 -0.8 0.1
MIT -1.8 1.9 1.9 1.9 -7.7 2.8 -0.5 0.1
NCL -2.5 3.1 18.7 3.2 -3.6 5.0 -0.5 0.2
REMARKS:
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0947g.snx :
Stations: BRAZ NYAL TROM
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0947g.snx :
Stations: BRAZ NYAL TROM
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0947g.snx :
Stations: BRAZ NYAL TROM HART MASP VILL
HARK A (IERS DOMES NO. 30302M007) REPLACES HART.
INCONSISTENCIES BETWEEN STATION NAMES WITH IDENTICAL IERS DOMES NOS.
AT Arequipa, Peru (AREQ), Hartebeesthoek, S. A. (HART, HARK, HAR1, HRAO),
Mas Palomas, Canary Is. (MASP, MAS1), Bangalore, India (IISC, IIS1)
AND Mendeleevo, Russia (MDVO, MDV1)
<-------------------- ACs --------------------->
IERS DOMES NO COD NRCAN ESA GFZ JPL NGS SIO
============= ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
30302M007 HART A HART B HART B HARK A HART B
30302M002 HARK A
--------- HARK A
31303M002 MASP A MASP B MASP B MAS1 A MASP B
31303M001 MASP A
22306M002 IISC A IISC B IISC A IISC A
22306M001 IISC A IISC A
12309M002 MDVO A MDVO B MDVO A
12309M001 MDVO A
<----- GNAACs ----->
IERS DOMES NO JPL MIT NCL
============= ====== ====== ======
42202M005 AREQ A AREQ A AREQ A
42202M005 ARE1 A AREQ B
30302M007 HART B HARK A
30302M004 HRAO A
30302M002 HART A HARK A
30302M002 HARK A
30302M002 HAR1 A
30302M002 HRAO A
31303M002 MAS1 A MASP B
31303M001 MASP A MAS1 A
22306M002 IISC A
22306M001 IISC A IISC A
22306M001 IIS1 A
12309M002 MDVO A
12309M002 MDV1 A
12309M001 MDVO A
--
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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