[IGSREPORT-5898] Wk 0997 G-SINEX Comparisons
NRCan
NRCan
Wed Mar 24 06:48:12 PST 1999
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IGS Electronic Report Wed Mar 24 6:48:12 PST 1999 Message Number 5898
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Author: NRCan GSDivision
Subject: Wk 0997 G-SINEX Comparisons
Subject: Wk 0997 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0997
(FEB 14, 1999 - FEB 20, 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*** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED.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:
jpl0997g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
mit0997g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0997g.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))
jpl0997g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 1.676 .000 .000
mit0997g.snx: BAKO .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0997g.snx: BISH .078 .000 -.003 .074 -.003 -.001 .046 .000 .000
mit0997g.snx: BISH .110 .000 .000 .128 .000 .000 .085 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0997g.snx: BSHM .000 .000 .000 .000 .000 .000 .000 .000 .000
mit0997g.snx: BSHM .081 .000 -.001 .078 -.002 .004 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0997g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit0997g.snx: INEG .081 .000 -.001 .078 -.002 .004 .100 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
mit0997g.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).
jpl0997g.snx: BARB .000 .000 .000 .000 .000 .000 .000 .000 .000
jpl0997g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
jpl0997g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0997g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0997g.snx: TROM .078 .000 .000 .096 .000 .000 2.369 .000 .000
FILE ncl0997g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0997g.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):
Lat LPGS JPL-NCL Lat SANT JPL-NCL Lat OHIG JPL-NCL
Lat BOGT MIT-NCL Lon MALI JPL-NCL Lon HARK JPL-NCL
Lon DGAR JPL-NCL Lon MALI MIT-NCL Hgt GOUG JPL-MIT
Hgt HRAO JPL-MIT Hgt HARK JPL-MIT Hgt COCO JPL-MIT
Hgt WUHN JPL-NCL Hgt COCO MIT-NCL Hgt HRAO MIT-NCL
Hgt BOGT MIT-NCL
130 GLOBAL STATIONS:
ALBH ALGO ALIC AMC2 ANKR AOML ASC1 AUCK BAHR BOGO
BOR1 BRMU BRUS CAGL CAS1 CASC CAT1 CEDU CHAT CHUR
CRO1 DAV1 DRAO DUBO EISL ELAT FAIR FLIN FORT GILB
GLSV GODE GOL2 GOLD GOPE GRAS GRAZ GUAM HARV 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
MKEA NANO NLIB NOTO NOUM NRC1 NTUS NYA1 NYAL OBER
ONSA PENC PERT PETP PIE1 POL2 POTS PRDS QUIN RAMO
RIOG 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
42 FIDUCIAL STATIONS:
ALGO BAHR 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:
130 GLOBAL STATIONS 42 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.0 1.2 1.2 5.1 5.1 4.6
Lon 1.1 3.5 3.5 10.4 10.2 7.0
Hgt 3.0 3.6 4.7 15.8 17.3 15.7
3D 3.4 5.2 6.0 19.6 20.7 17.8
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
138 GLOBAL STATIONS 42 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.220 0.071 0.357 13.226 24.546 5.950
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 0.8 2.1 -0.2 2.1 -3.3 2.8 -1.0 0.1
MIT 2.7 1.4 3.1 1.4 -4.4 1.8 -0.7 0.1
NCL 6.5 3.1 -4.0 2.9 -18.4 4.3 -0.8 0.1
REMARKS:
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0997g.snx :
Stations: AREQ BRAZ KERG KIT3 LHAS
FOR THE FILE mit0997g.snx, UT WAS DELETED & THE A PRIORI COVARIANCE MATRIX
WAS SCALED UPWARD (ALL ELEMENTS) BY A FACTOR OF 0.0005% PRIOR TO DECONSTRAINING.
(NOTE: PREVIOUS WEEKS USED FACTOR OF 0.05%. IT IS NOTICED THAT THE SMALLER
FACTOR CAUSES NO CHANGE IN ANY OF THE ABOVE RESULTS.)
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0997g.snx :
Stations: AREQ BRAZ HART KERG KIT3 LHAS
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0997g.snx :
Stations: AREQ BRAZ HART KERG KIT3 LHAS MAD2 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
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:
cod09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09977.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
============= ====== ====== ====== ====== ====== ====== ======
50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
31303M002 MASP A MASP B MASP B MAS1 A MAS1 A MASP B MAS1 A
12355M002 PETR A PETP A PETP A PETP A
12353M001 YAKZ A YAKA A YAKA A YAKZ A
40472S004 AMCT A AMC2 A
40472S003 AMC2 A
50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TID2 A
30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
10302M006 TROM A TRO1 A TRO1 A TRO1 A
40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD B GOL2 A
13407S012 MADR A MAD2 A MADR A MAD2 A
22306M002 IISC B IISC A IISC B IISC A
22601M001 NTUS A NTUS A NTUS A
22601M002 NTUS A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
BISH A URUM A RIOG A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
RAMO 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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