[IGSREPORT-5841] Wk 0995 G-SINEX Comparisons
NRCan
NRCan
Wed Mar 3 13:40:53 PST 1999
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IGS Electronic Report Wed Mar 3 13:40:53 PST 1999 Message Number 5841
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Author: NRCan GSDivision
Subject: Wk 0995 G-SINEX Comparisons
Subject: Wk 0995 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0995
(JAN 31, 1999 - FEB 6, 1999)
Contacts: 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.
*** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED. ***
FILES COMPARED:
jpl0995g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
mit0995g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0995g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
GNAACs: JPL MIT NCL
STATIONS WITH INCONSISTENT ANTENNA ECCENTRICITY INFORMATION:
(FILE: / STATION / L1 (UNE) / L2 (UNE) / ECCENTRICITY (UNE))
(UNE = Up North East (metres))
jpl0995g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 1.676 .000 .000
mit0995g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0995g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
mit0995g.snx: BISH .110 .000 .000 .128 .000 .000 .085 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0995g.snx: BSHM .000 .000 .000 .000 .000 .000 .000 .000 .000
mit0995g.snx: BSHM .081 .000 -.001 .078 -.002 .004 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0995g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit0995g.snx: INEG .081 .000 -.001 .078 -.002 .004 .100 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0995g.snx: PETP .110 .000 .000 .128 .000 .000 .080 .000 .000
mit0995g.snx: PETP .110 .000 .000 .128 .000 .000 .080 .000 .000
- IERS DOMES NO 12355M001 should refer to PETR (0.0796 M. eccentricity)
and 12355M002 to PETP (0.0435 M. eccentricity). Yet JPL lists PETP, PETR for 12355M001,
while MIT lists them for 12355M002.
jpl0995g.snx: PETR .110 .000 .000 .128 .000 .000 .080 .000 .000
mit0995g.snx: PETR .110 .000 .000 .128 .000 .000 .044 .000 .000
- IERS DOMES NO 12355M001 should refer to PETR (0.0796 M. eccentricity)
and 12355M002 to PETP (0.0435 M. eccentricity). Yet JPL lists PETP, PETR for 12355M001,
while MIT lists them for 12355M002.
mit0995g.snx: TIXI .108 .000 .000 .128 .001 .002 .079 .000 .000
- According to igs_01.pcv, DORNE MARGOLIN ASH antenna should have L1/L2 vertical offset
0.110, 0.128 M. respectively with 0.0 L1/L2 offset north and east. This leaves MIT
slightly off (but < 3 mm. in all offsets).
jpl0995g.snx: BARB .000 .000 .000 .000 .000 .000 .000 .000 .000
jpl0995g.snx: HFLK .078 .000 .000 .096 .000 .000 .000 .000 .000
jpl0995g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
jpl0995g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0995g.snx: SFER .075 .002 -.001 .069 -.001 .002 1.626 .000 .000
jpl0995g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0995g.snx: TROM .110 .000 .000 .128 .000 .000 2.369 .000 .000
jpl0995g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
FILE ncl0995g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0995g.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
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 MCM4 65.0 mm.
THE FOLLOWING STATIONS WERE DELETED FROM MIT
DUE TO DIFFERENCES IN EXCESS OF 55 mm. WITH ITRF96
AFTER 7-PARAMETER TRANSFORMATION TO ITRF96
Hgt MCM4 69.8 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 MCM4 65.4 mm.
CONFIDENCE LEVEL FOR OUTLIER DETECTION : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat SANT JPL-NCL Lat MAG0 JPL-NCL Lat THU1 MIT-NCL
Lon MALI JPL-NCL Lon HARK JPL-NCL Lon DGAR JPL-NCL
Hgt WUHN JPL-MIT Hgt LPGS JPL-MIT Hgt AREQ JPL-MIT
Hgt AMC2 JPL-MIT Hgt YAKA JPL-NCL Hgt WUHN JPL-NCL
Hgt GALA JPL-NCL Hgt TAEJ MIT-NCL
122 GLOBAL STATIONS:
ALBH ALGO ALIC ANKR AOML ASC1 AUCK BAHR BOGO BOR1
BRMU BRUS CAGL CAS1 CASC CEDU CHAT CHUR COCO CRO1
DAV1 DRAO DUBO EISL ELAT FAIR FLIN FORT GILB GLSV
GODE GOL2 GOLD GOPE GOUG GRAS GRAZ GUAM HERS HOB2
HOFN HRAO IISC IRKT JOZE JPLM KABR KARR KATZ KELY
KERG KIRU KOKB KOSG KOUR KSTU KUNM KWJ1 LAMA MAC1
MAD2 MADR MAS1 MATE MAW1 MDO1 MEDI METS MKEA NANO
NICO NLIB NOTO NOUM NRC1 NTUS NYA1 NYAL OBER ONSA
PENC PERT PIE1 POL2 POTS PRDS QUIN RAMO RIOG SCH2
SELE SHAO SJDV SOL1 STJO SUWN TELA TID2 TIDB TOUL
TOW2 TRO1 TSKB UCLU UPAD USNA USNO USUD VESL VILL
WES2 WHIT WILL WSLR WSRT WTZR XIAN YAKZ YAR1 YELL
ZECK ZWEN
42 FIDUCIAL STATIONS:
ALGO AREQ BAHR BRMU CAS1 DAV1 DRAO FAIR FORT GODE
GRAZ GUAM HOB2 IRKT KERG KOKB KOSG KOUR KWJ1 MAC1
MAD2 MALI MAS1 MATE MDO1 NLIB NYAL ONSA PERT PIE1
POTS SANT SHAO THU1 TIDB TSKB VILL WES2 WTZR YAR1
YELL ZWEN
AVERAGE COORDINATE RMS USING ITRF96:
122 GLOBAL STATIONS 42 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 0.9 1.1 1.2 5.2 5.2 4.9
Lon 0.8 3.5 3.3 10.4 10.1 7.1
Hgt 2.7 2.9 4.2 14.0 14.6 13.9
3D 3.0 4.7 5.4 18.2 18.5 16.4
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
134 GLOBAL STATIONS 42 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.150 0.074 0.276 13.674 21.041 6.595
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 1.6 2.0 -2.8 2.0 3.5 2.8 -1.0 0.1
MIT 3.0 1.5 -2.9 1.5 2.0 2.0 -0.8 0.1
NCL 6.3 2.8 -9.5 2.8 1.4 4.0 -0.8 0.1
REMARKS:
STATION NAME/POINT CODES CHANGED IN ncl0995g.snx
ENFORCED FROM TEMPLATE FILE igs.snx .
Old New IERS
Code/Pt Code/Pt DOMES NO
------- ------- --------
YAKZ A YAKA A 12353M001
1 Change in all.
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0995g.snx :
Stations: BRAZ KIT3 LHAS OHIG
FOR THE FILE mit0995g.snx, UT WAS DELETED & THE A PRIORI COVARIANCE MATRIX
WAS SCALED UPWARD (ALL ELEMENTS) BY A FACTOR OF 0.05% PRIOR TO DECONSTRAINING.
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0995g.snx :
Stations: BRAZ HART KIT3 LHAS OHIG
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0995g.snx :
Stations: BRAZ HART KIT3 LHAS MAD2 OHIG TROM
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
============= ====== ====== ======
40472S003 AMCT A
AMC2 A
40472S004 AMC2 A
42202M005 AREQ A AREQ A AREQ A
ARE1 A
42005M001 GALA A GALA A GALA A
GAL1 A
40405S031 GOL2 A GOLD A GOL2 A
GOLD A GOL2 A GOLD A
GOL1 A
30302M007 HARK A HARK A HARK A
HART A
HAR1 A
22306M002 IISC A IISC A IISC A
IIS1 A
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
12355M001 PETR A
PETP A
12355M002 PETP A PETP A
PETR A
50103M108 TID2 A TIDB A TID2 A
TIDB A TID2 A TIDB A
12353M001 YAKA A YAKZ A YAKZ A
YAKZ A YAKA A
50107M004 YAR1 A YAR1 A YAR1 A
YAR2 A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
ALIC A BAKO A BISH A BSHM A ELAT A GILB A INEG A KABR A KARR A KATZ A
MAW1 A RAMO A RIOG A TELA A TOW2 A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
RIOG A INEG A BISH A KATZ A GILB A KABR A BSHM A ELAT A TELA A
SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN ABBREVIATED .ssc FILES:
cod09957.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09957.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa09957.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09957.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09957.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09957.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09957.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
============= ====== ====== ====== ====== ====== ====== ======
12355M002 PETR A PETP A PETP A
12355M001 PETP A
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
12309M002 MDVO A MDVO B MDVO A MDVO A
12353M001 YAKZ A YAKZ A YAKA A YAKZ A
40472S004 AMCT A AMC2 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 YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
10302M006 TROM A TRO1 A TRO1 A
22306M002 IISC A IISC B IISC A IISC A IISC B IISC A
22601M001 NTUS A NTUS A NTUS A NTUS A NTUS A
22601M002 NTUS A
13407S012 MADR A MAD2 A MADR A MAD2 A
42005M001 GALA A GALA A GALA B GALA A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
BISH A RIOG A
MISSING IERS DOMES NOS AT NGS:
-----------------------------
BAKO A
MISSING IERS DOMES NOS AT SIO:
-----------------------------
INEG A KATZ A GILB A KABR A BSHM A ELAT A TELA 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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