[IGSREPORT-5842] Wk 0996 G-SINEX Comparisons
NRCan
NRCan
Wed Mar 3 13:42:06 PST 1999
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IGS Electronic Report Wed Mar 3 13:42:06 PST 1999 Message Number 5842
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Author: NRCan GSDivision
Subject: Wk 0996 G-SINEX Comparisons
Subject: Wk 0996 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0996
(FEB 7, 1999 - FEB 13, 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*** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED.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:
jpl0996g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
mit0996g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0996g.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))
jpl0996g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 1.676 .000 .000
mit0996g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0996g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
mit0996g.snx: BISH .110 .000 .000 .128 .000 .000 .085 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0996g.snx: BSHM .000 .000 .000 .000 .000 .000 .000 .000 .000
mit0996g.snx: BSHM .081 .000 -.001 .078 -.002 .004 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0996g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit0996g.snx: INEG .081 .000 -.001 .078 -.002 .004 .100 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
mit0996g.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 MIT lists them both for 12355M002.
mit0996g.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 MIT lists them both for 12355M002.
mit0996g.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).
jpl0996g.snx: BARB .000 .000 .000 .000 .000 .000 .000 .000 .000
jpl0996g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
jpl0996g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0996g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0996g.snx: TROM .078 .000 .000 .096 .000 .000 2.369 .000 .000
FILE ncl0996g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0996g.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)
CONFIDENCE LEVEL FOR OUTLIER DETECTION : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lon HARK JPL-NCL Lon MALI JPL-NCL Lon DGAR JPL-NCL
Lon HRAO JPL-NCL Hgt LPGS JPL-MIT Hgt OHIG JPL-MIT
Hgt WUHN JPL-NCL Hgt COCO MIT-NCL Hgt LPGS MIT-NCL
135 GLOBAL STATIONS:
ALBH ALGO ALIC AMC2 ANKR AOML ASC1 AUCK BAHR BOGO
BOGT BOR1 BRAZ BRMU BRUS CAGL CAS1 CASC CEDU CHAT
CHUR CIT1 CRO1 DAV1 DRAO DUBO EISL ELAT FAIR FLIN
FORT GILB GLSV GODE GOL2 GOLD GOPE GOUG GRAS GRAZ
GUAM HERS HFLK HOB2 HOFN HOLB IISC IRKT JOZE JPLM
KABR KARR KATZ KELY KIRU KOKB KOSG KOUR KSTU KUNM
KWJ1 LAMA MAC1 MAD2 MADR MAG0 MAS1 MATE MAW1 MCM4
MDO1 MEDI METS MKEA NANO NICO NLIB NOTO NOUM NRC1
NTUS NYA1 NYAL OBER ONSA PENC PERT PIE1 POL2 POTS
PRDS QUIN RAMO RIOG RIOP SANT SCH2 SELE SFER SHAO
SJDV SOL1 STJO SUWN TAEJ TELA THU1 TID2 TIDB TOUL
TOW2 TRO1 TSKB UCLU UPAD URUM USNA USNO USUD VESL
VILL WES2 WHIT WILL WSLR WSRT WTZR XIAN YAKA YAKZ
YAR1 YELL ZECK ZIMM ZWEN
43 FIDUCIAL STATIONS:
ALGO BAHR BRAZ BRMU CAS1 DAV1 DRAO FAIR FORT GODE
GRAZ GUAM HOB2 IRKT KOKB KOSG KOUR KWJ1 MAC1 MAD2
MALI MAS1 MATE MCM4 MDO1 NLIB NYAL OHIG ONSA PERT
PIE1 POTS SANT SHAO THU1 TIDB TSKB VILL WES2 WTZR
YAR1 YELL ZWEN
AVERAGE COORDINATE RMS USING ITRF96:
135 GLOBAL STATIONS 43 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.0 1.3 1.2 4.7 5.0 4.5
Lon 0.9 3.4 3.3 9.2 9.0 6.2
Hgt 3.2 2.6 4.3 16.3 17.5 16.5
3D 3.4 4.4 5.5 19.3 20.3 18.2
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
141 GLOBAL STATIONS 43 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.165 0.067 0.317 12.761 20.745 7.006
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 -0.1 1.9 -2.0 2.0 4.4 2.8 -0.9 0.1
MIT -0.8 1.4 -1.8 1.4 3.6 1.9 -0.7 0.1
NCL 0.8 2.9 -7.1 2.8 5.1 4.1 -0.8 0.1
REMARKS:
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0996g.snx :
Stations: AREQ KERG KIT3 LHAS
FOR THE FILE mit0996g.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 mit0996g.snx :
Stations: AREQ HART KERG KIT3 LHAS
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0996g.snx :
Stations: AREQ BRAZ HART KERG 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
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
12309M001 MDVO A
12355M001 PETR A
12355M002 PETP A PETP A PETP A
PETR 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 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 URUM A
MISSING IERS DOMES NOS AT MIT:
-----------------------------
RIOG A INEG A URUM 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:
cod09967.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09967.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa09967.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09967.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09967.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09967.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09967.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
50107M004 YAR1 A 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
30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
12353M001 YAKZ A YAKA A YAKA A YAKZ A
10302M006 TROM A TRO1 A TRO1 A TRO1 A
31303M002 MASP A MASP B MASP B MAS1 A MAS1 A MASP B MAS1 A
40472S004 AMCT A AMC2 A
40472S003 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
22601M001 NTUS A NTUS A NTUS A NTUS A NTUS A
22601M002 NTUS A
13407S012 MADR A MAD2 A MADR A MAD2 A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
BISH A URUM 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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