[IGSREPORT-4732] Wk 0946 G-SINEX Comparisons
AC
AC
Tue Mar 24 12:10:32 PST 1998
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IGS Electronic Report Tue Mar 24 12:10:32 PST 1998 Message Number 4732
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0946 G-SINEX Comparisons
Subject: Wk 0946 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0946
(FEB 22, 1998 - FEB 28, 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:
mit0946g.snx at cddis.gsfc.nasa.gov
jpl0946g.snx at cddis.gsfc.nasa.gov
ncl0946g.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))
jpl0946g.snx: BISH .075 .002 -.001 .069 -.001 .002 .046 .000 .000
mit0946g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
- Unresolvable (no log file)
jpl0946g.snx: CAGL .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0946g.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.
jpl0946g.snx: ELAT .069 .000 .000 .068 .000 .000 -.011 .000 .000
mit0946g.snx: ELAT .078 .000 -.003 .074 -.003 -.001 -.011 .000 .000
- Unresolvable (no log file)
jpl0946g.snx: KATZ .069 .000 .000 .068 .000 .000 -.012 .000 .000
mit0946g.snx: KATZ .078 .000 -.003 .074 -.003 -.001 -.012 .000 .000
- Unresolvable (no log file)
jpl0946g.snx: KOUR .078 .000 .000 .096 .000 .000 .132 .000 .000
mit0946g.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.
jpl0946g.snx: MALI .078 .000 .000 .096 .000 .000 .222 .000 .000
mit0946g.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.
jpl0946g.snx: NOUM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
mit0946g.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.
jpl0946g.snx: TELA .069 .000 .000 .068 .000 .000 .000 .000 .000
mit0946g.snx: TELA .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable (no log file)
jpl0946g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
mit0946g.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.
jpl0946g.snx: YAR1 .078 .000 .000 .096 .000 .000 .073 .000 .000
mit0946g.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.
jpl0946g.snx: HARK .110 .000 .000 .128 .000 .000 9.754 .000 .000
jpl0946g.snx: HART .110 .000 .000 .128 .000 .000 9.754 .000 .000
jpl0946g.snx: HARV .110 .000 .000 .128 .000 .000 .061 .000 .000
jpl0946g.snx: HOFN .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0946g.snx: HRAO .110 .000 .000 .128 .000 .000 9.754 .000 .000
jpl0946g.snx: LPGS .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0946g.snx: NICO .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0946g.snx: SELE .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0946g.snx: SFER .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0946g.snx: SOFI .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0946g.snx: UPAD .078 .000 -.003 .074 -.003 -.001 1.962 .000 .000
jpl0946g.snx: ZECK .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0946g.snx: ZIMM .069 .000 .000 .068 .000 .000 .000 .000 .000
FILE ncl0946g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0946g.snx (SEE REMARKS BELOW)
MASP Multiple Sites
AREQ Multiple Sites
IISC Multiple Sites
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MASP AREQ IISC MDVO
CONFIDENCE LEVEL FOR OUTLIER DETECTION (ITRF94): 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat CAS1 MIT-JPL Lat MAS1 MIT-JPL Lat KERG MIT-JPL
Lat DAV1 MIT-JPL Lat SANT MIT-JPL Lat MAS1 MIT-NCL
Lat KERG MIT-NCL Lon TAEJ MIT-JPL Lon NTUS MIT-JPL
Lon AUCK MIT-JPL Lon AUCK MIT-NCL Hgt WSRT JPL-NCL
Hgt NTUS MIT-JPL Hgt MCM4 MIT-JPL Hgt FORT MIT-JPL
Hgt NTUS MIT-NCL
57 GLOBAL STATIONS:
ALBH ALGO ANKR ASC1 BAHR BOGT BRMU CHAT COCO CRO1
DGAR DRAO DUBO EISL FAIR GODE GOLD GRAZ GUAM HOB2
IRKT KELY KIRU KIT3 KOKB KOSG KWJ1 LHAS MAC1 MADR
MATE MDO1 METS MKEA NLIB NRC1 ONSA PERT POL2 POTS
RCM6 REYK SHAO STJO TAHI THU1 TIDB TSKB USNO USUD
VILL WES2 WHIT WTZR YAR1 YELL ZWEN
11 FIDUCIAL STATIONS:
ALGO FAIR GOLD KOKB KOSG MADR SANT TIDB WTZR YAR1
YELL
AVERAGE COORDINATE RMS USING ITRF94:
57 GLOBAL STATIONS 11 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.3 1.2 0.6 9.0 9.1 9.0
Lon 2.1 1.5 1.0 8.6 7.9 8.2
Hgt 3.0 3.0 1.6 9.9 8.4 9.4
3D 3.9 3.6 2.0 15.9 14.7 15.4
VARIANCE FACTORS WITH ITRF94 (CHI-SQUARE / (DEGREES OF FREEDOM)):
57 GLOBAL STATIONS 11 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF94 JPL-ITRF94 NCL-ITRF94
------- ------- ------- ---------- ---------- ----------
0.100 0.757 0.513 2.077 1.360 1.610
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 -12.4 4.1 33.4 4.5 7.0 5.7 -1.5 0.4
MIT -8.7 3.0 11.8 3.2 0.9 3.6 -1.4 0.4
NCL -13.3 4.1 30.5 4.2 6.8 5.8 -1.5 0.4
REMARKS:
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM mit0946g.snx :
Stations: TROM
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM jpl0946g.snx :
Stations: TROM
THE FOLLOWING ITRF94 FIDUCIAL STATIONS ARE MISSING FROM ncl0946g.snx :
Stations: HART TROM
INCONSISTENCIES BETWEEN STATION NAMES WITH IDENTICAL IERS DOMES NOS.
AT Arequipa, Peru (AREQ), Hartebeesthoek, S. A. (HART, HARK, HRAO),
Mas Palomas, Canary Is. (MASP, MAS1), Bangalore, India (IISC, IIS1)
AND Mendeleevo, Russia (MDVO)
<-------------------- ACs --------------------->
IERS DOMES NO COD NRCAN ESA GFZ JPL NGS SIO
============= ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ A AREQ B AREQ A AREQ A AREQ B AREQ A
30302M007 HART A HARK A HART B HARK A HARK A
30302M002 HARK A
30302M002 HRAO A
--------- HARK A
31303M002 MASP A MAS1 A MASP B MAS1 A MAS1 A
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 AREQ B
30302M007 HART B HARK A
30302M004 HRAO A
30302M002 HART A HARK A
30302M002 HARK A
30302M002 HRAO A HRAO A
31303M002 MAS1 A MASP B MAS1 A
--------- MASP A
31303M001 MASP A
22306M002 IISC B IISC A
22306M001 IISC A IISC A
22306M001 IIS1 A
12309M002 MDVO A MDVO B
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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