[IGSREPORT-5372] Wk 0974 G-SINEX Comparisons
AC
AC
Thu Oct 1 11:15:31 PDT 1998
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IGS Electronic Report Thu Oct 1 11:15:31 PDT 1998 Message Number 5372
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0974 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0974
(SEP 6, 1998 - SEP 12, 1998)
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 station present in only one GNAAC combined SINEX files was de-
leted from all three combined solutions. Every solution was then sub-
jected to a 7-parameter transformation into a common reference system
(the positions of the ITRF96 RS47 station set expected at mid-week).
Station coordinates with ITRF96 transformation residuals in excess of
55 mm. from ITRF96 after transformation were excluded from subsequent
analysis of this combined solution, and the 7-parameter transformation
was reapplied.
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:
mit0974g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl0974g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0974g.snx at cddis.gsfc.nasa.gov or cddisa.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))
jpl0974g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0974g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
- Both wrong. Should be L1/L2 offset, eccentricity 0.110, 0.128, 0.119 M. respectively.
jpl0974g.snx: HFLK .078 .000 .000 .096 .000 .000 .000 .000 .000
ncl0974g.snx: HRAO .110 .000 .000 .128 .000 .000 .000 .000 .000
jpl0974g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0974g.snx: TROM .078 .000 .000 .096 .000 .000 2.475 .000 .000
FILE ncl0974g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0974g.snx
(MODEL / SER. NO. / L1 (UNE) / L2 (UNE))
(UNE = Up North East (metres))
DORNE MARGOLIN B ----- .078 .000 .000 .096 .000 .000
DORNE MARGOLIN B ----- .000 .000 .000 .000 .000 .000
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: NYAL
ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0974g.snx
GALA Multiple Sites
IISC Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: GALA IISC
COORDINATE DIFFERENCE THRESHOLD FOR STATION REJECTION: 55 mm.
(REFERS TO COORDINATE DIFFERENCE FROM ITRF96 AFTER 7-PARAMETER TRANSFORMATION)
THE FOLLOWING STATIONS WERE DELETED FROM NCL
DUE TO DIFFERENCES IN EXCESS OF 55 mm. WITH ITRF96
AFTER 7-PARAMETER TRANSFORMATION TO ITRF96
Hgt HOB2 57.5 mm.
THE FOLLOWING STATIONS WERE DELETED FROM JPL
DUE TO DIFFERENCES IN EXCESS OF 55 mm. WITH ITRF96
AFTER 7-PARAMETER TRANSFORMATION TO ITRF96
Hgt HOB2 142.5 mm.
Lon HART 240.0 mm.*
Lat HART 650.8 mm.*
*Proper offset may not have been used:
30302M002 to 30302M007 dx/dy/dz: -.145m., -.374m., -.623m.
THE FOLLOWING STATIONS WERE DELETED FROM MIT
DUE TO DIFFERENCES IN EXCESS OF 55 mm. WITH ITRF96
AFTER 7-PARAMETER TRANSFORMATION TO ITRF96
Hgt HOB2 66.0 mm.
CONFIDENCE LEVEL FOR OUTLIER DETECTION : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat DGAR JPL-NCL Lat HARK MIT-JPL Lat KERG MIT-JPL
Lat DGAR MIT-JPL Lat MALI MIT-JPL Lat TIDB MIT-JPL
Lat MAW1 MIT-JPL Lat DAV1 MIT-JPL Lon ALBH JPL-NCL
Lon MALI JPL-NCL Lon COCO JPL-NCL Lon RIOG MIT-JPL
Lon OHIG MIT-JPL Lon MAS1 MIT-JPL Lon BAKO MIT-JPL
Lon ALBH MIT-JPL Lon COCO MIT-JPL Hgt GUAM JPL-NCL
Hgt MDVO JPL-NCL Hgt MDVO MIT-JPL Hgt CAGL MIT-JPL
Hgt GUAM MIT-JPL Hgt DGAR MIT-JPL Hgt COCO MIT-JPL
Hgt KWJ1 MIT-JPL Hgt CAS1 MIT-JPL Hgt WUHN MIT-NCL
122 GLOBAL STATIONS:
ALGO ALIC AMCT AREQ ASC1 AUCK BAHR BARB BOGO BOR1
BRMU BRUS CASA CEDU CHAT CHUR CRO1 DARW DRAO DUBO
EBRE EISL ELAT FAIR FORT GLSV GODE GOL2 GOLD GOPE
GRAS GRAZ HERS HOFN HOLB IRKT JOZE JPLM KABR KARR
KATZ KELY KIRU KIT3 KOKB KOSG KOUR KSTU LAMA LHAS
LPGS MAC1 MAD2 MADR MAG0 MATE MCM4 MDO1 MEDI METS
MKEA NANO NICO NLIB NOTO NOUM NRC1 NSSP NTUS NYA1
NYAL OBER ONSA PENC PERT PETR PIE1 POL2 POTS PRDS
QUIN RAMO RCM6 REYK RICH SANT SCH2 SELE SHAO SJDV
SOL1 STJO SUWN TAEJ TELA THU1 TID2 TOUL TOW2 TRO1
TSKB UCLU UPAD URUM USNA USNO USUD VILL WES2 WHIT
WILL WSLR WSRT WTZR XIAN YAKA YAKZ YAR1 YELL ZECK
ZIMM ZWEN
43 FIDUCIAL STATIONS:
ALGO AREQ BRMU DAV1 DRAO FAIR FORT GODE GOL2 GRAZ
GUAM IRKT KERG KIT3 KOKB KOSG KOUR KWJ1 LHAS MAC1
MAD2 MALI MAS1 MATE MDO1 NLIB NYAL OHIG ONSA PERT
PIE1 POTS SANT SHAO THU1 TID2 TSKB VILL WES2 WTZR
YAR1 YELL ZWEN
AVERAGE COORDINATE RMS USING ITRF96:
122 GLOBAL STATIONS 43 FIDUCIAL STATIONS
MIT-JPL MIT-NCL JPL-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.2 0.6 1.1 4.1 4.7 4.4
Lon 1.1 0.6 1.2 5.9 5.3 5.6
Hgt 2.8 2.3 2.9 11.8 11.5 11.6
3D 3.2 2.4 3.4 13.8 13.5 13.6
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
131 GLOBAL STATIONS 43 FIDUCIAL STATIONS
JPL-NCL MIT-JPL MIT-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.369 0.552 0.175 3.435 3.135 2.452
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 -1.9 2.1 -11.0 2.2 -15.9 2.9 0.3 0.1
MIT -3.7 1.8 -3.2 1.8 -13.0 2.6 -0.3 0.1
NCL -1.2 3.0 -4.8 3.1 -13.7 4.2 0.1 0.2
REMARKS:
STATION NAME/POINT CODES CHANGED IN mit0974g.snx
ENFORCED FROM TEMPLATE FILE igs.snx at cddis.gsfc.nasa.gov.
Old New IERS
Code/Pt Code/Pt DOMES NO
------- ------- --------
NYAL B NYA1 A 10317M003
1 Change in all.
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0974g.snx :
Stations: BRAZ
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0974g.snx :
Stations: BRAZ
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0974g.snx :
Stations: BRAZ HART MAD2
SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN COMPARED GNAAC FILES:
(ENTRIES APPEAR ONLY WHERE GNAACS DIFFER.)
IERS DOMES NO JPL MIT NCL
============= ====== ====== ======
42202M005 AREQ A AREQ A AREQ A
ARE1 A
42005M001 GALA A GALA A GALA A
GAL1 A GALA B
40405S031 GOL2 A GOLD A GOL2 A
GOLD A GOL2 A GOLD A
GOL1 A
30302M007 HARK A HARK A HARK A
HART A HART B
HAR1 A
22306M002 IISC A IISC A IISC A
IIS1 A IISC B
13407S012 MAD2 A MAD2 A
MADR A MADR A
31303M002 MAS1 A MAS1 A
MASP A
31303M001 MAS1 A
12309M002 MDVO A MDVO A
MDV1 A
12309M001 MDVO A
10317M003 NYA1 A NYAL B NYA1 A
40499S020 RCM6 A RCM6 A RCM6 A
RICH A RICH A
50103M108 TID2 A TIDB A TID2 A
TIDB A TID2 A TIDB A
12353M001 YAKA A YAKA A
YAKZ A YAKZ A
50107M004 YAR1 A YAR1 A YAR1 A
YAR2 A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
ALIC A BAKO A DARW A ELAT A KABR A KARR A KATZ A MAW1 A RAMO A RIOG A
TELA A TOW2 A URUM A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
RIOG A BAKO A URUM A KATZ A KABR A ELAT A TELA A RAMO A
SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN ABBREVIATED .ssc FILES:
cod09747.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09747.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa09747.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09747.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09747.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09747.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09747.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
(ENTRIES APPEAR ONLY WHERE ACS DIFFER.)
IERS DOMES NO COD NRCan ESA GFZ JPL NGS SIO
============= ====== ====== ====== ====== ====== ====== ======
30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
31303M002 MASP A MASP B MASP B MAS1 A MAS1 A MASP B MAS1 A
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
12309M002 MDVO A MDVO B MDVO A MDVO A
12353M001 YAKZ A YAKA A YAKZ A
40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD B GOL2 A
50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TID2 A
50107M004 YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
22306M002 IISC A IISC B IISC A IISC A IISC B IISC A
40499S020 RICH A RCM6 A RCM6 A RCM6 A
10302M006 TROM A TRO1 A
10317M003 NYAL A NYA1 A NYA1 A
13407S012 MADR A MAD2 A MADR A MAD2 A
22601M001 NTUS A NTUS A NTUS A NTUS A
22601M002 NTUS A
42005M001 GALA A GALA A GALA B GALA A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
URUM A RIOG A
MISSING IERS DOMES NOS AT SIO:
-----------------------------
BAKO A KATZ A KABR A ELAT A TELA A RAMO A
--
David Hutchison
Geodetic Survey of Canada
Ottawa, Ontario, Canada
Internet: hutch at geod.emr.ca
[Mailed From: David Hutchison <hutch at geod.nrcan.gc.ca>]
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