[IGSREPORT-5694] Wk 0985 G-SINEX Comparisons
NRCan
NRCan
Fri Jan 22 14:04:56 PST 1999
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IGS Electronic Report Fri Jan 22 14:04:56 PST 1999 Message Number 5694
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Author: NRCan GSDivision
Subject: Wk 0985 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0985
(NOV 22, 1998 - NOV 28, 1998)
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.
FILES COMPARED:
jpl0985g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
mit0985g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0985g.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))
jpl0985g.snx: BSHM .000 .000 .000 .000 .000 .000 .000 .000 .000
mit0985g.snx: BSHM .081 .000 -.001 .078 -.002 .004 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0985g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit0985g.snx: INEG .081 .000 -.001 .078 -.002 .004 .066 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0984g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
mit0984g.snx: MDVO .078 .000 -.003 .074 -.003 -.001 .146 .000 .000
- Both wrong. Should be L1/L2 offset, eccentricity 0.0692, 0.0692, 0.146 M. respectively.
See log file, as igs.snx lists no L1/L2 offsets for antenna EXT. L1/L2 KINEMATIC.
jpl0985g.snx: PETP .110 .000 .000 .128 .000 .000 .080 .000 .000
mit0985g.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 PETP, PETR for 12355M002.
mit0985g.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 PETP, PETR for 12355M002.
jpl0985g.snx: TROM .110 .000 .000 .128 .000 .000 2.369 .000 .000
mit0985g.snx: TROM .078 .000 .000 .096 .000 .000 2.475 .000 .000
- Both wrong. IERS DOMES NO 10302M003 should refer to TROM (2.4750 M. eccentricity)
and 10302M006 to TRO1 (0.0000 M. eccentricity). Yet JPL lists TRO1 A for 10302M006,
while MIT lists TROM B for the same IERS DOMES NO.
jpl0985g.snx: HFLK .078 .000 .000 .096 .000 .000 .000 .000 .000
jpl0985g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0985g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0985g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
FILE ncl0985g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0985g.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 mit0985g.snx
MAS1 Multiple Sites
AREQ Multiple Sites
GALA Multiple Sites
IISC Multiple Sites
MDVO Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MAS1 AREQ GALA IISC MDVO
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 62.1 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 67.0 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 61.8 mm.
CONFIDENCE LEVEL FOR OUTLIER DETECTION : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat BAKO JPL-MIT Lat MAW1 JPL-MIT Lat HRAO JPL-MIT
Lat GOUG JPL-MIT Lat HARK JPL-MIT Lat VESL JPL-MIT
Lat HRAO MIT-NCL Lat HARK MIT-NCL Lat GOUG MIT-NCL
Lon BAKO JPL-MIT Lon HOB2 JPL-MIT Hgt WUHN JPL-MIT
Hgt LPGS JPL-MIT Hgt HARK JPL-MIT Hgt HRAO MIT-NCL
Hgt HARK MIT-NCL Hgt LPGS MIT-NCL Hgt MALI MIT-NCL
Hgt WUHN MIT-NCL
130 GLOBAL STATIONS:
ALBH ALGO ALIC AMC2 ANKR AOML AREQ ASC1 AUCK BAHR
BOGO BOGT BOR1 BRMU BRUS CAGL CAS1 CASA CASC CEDU
CHAT CHUR COCO CRO1 DAV1 DGAR DRAO DUBO EISL ELAT
FAIR FLIN FORT GILB GLSV GODE GOL2 GOLD GOPE GRAS
GRAZ GUAM HERS HOFN HOLB IRKT JOZE JPLM KABR KARR
KATZ KELY KERG KIRU KOKB KOSG KOUR KSTU KWJ1 LAMA
LHAS MAC1 MAD2 MADR MAG0 MAS1 MATE MDO1 MEDI METS
MKEA NANO NLIB NOTO NOUM NRC1 NSSP NTUS NYA1 NYAL
OBER ONSA PENC PERT PIE1 POL2 POTS PRDS QUIN RAMO
REYK RIOG SANT SCH2 SELE SHAO SJDV SOL1 STJO SUWN
TAEJ TELA THU1 TID2 TIDB TIXI TOUL TOW2 TRO1 TSKB
UCLU UPAD URUM USNA USNO USUD VILL WES2 WHIT WILL
WSLR WSRT WTZR XIAN YAKA YAKZ YAR1 YAR2 YELL ZWEN
43 FIDUCIAL STATIONS:
ALGO AREQ BAHR BRMU CAS1 DAV1 DRAO FAIR FORT GODE
GRAZ GUAM HOB2 IRKT KERG KOKB KOSG KOUR KWJ1 LHAS
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:
130 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 0.7 0.9 6.2 5.6 5.8
Lon 1.9 0.8 1.7 8.2 7.5 7.9
Hgt 2.8 1.5 3.2 12.4 13.2 13.5
3D 3.5 1.8 3.7 16.1 16.2 16.7
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
132 GLOBAL STATIONS 43 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.105 0.037 0.193 8.012 10.666 7.381
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 -4.0 1.9 -6.7 2.0 1.8 2.7 -0.9 0.1
MIT -2.5 1.5 -9.7 1.6 0.6 1.8 -0.7 0.1
NCL -4.8 2.9 -11.6 2.8 3.0 4.3 -0.9 0.1
REMARKS:
FILE mit0985g.snx: STDs for daily EOPs listed in SOLUTION/APRIORI block, with-
out corresponding covariances in SOLUTION/MATRIX_APRIORI
block. Hence, these records are deleted prior to any com-
putation. NOTE: A priori UT STD 6.66667 ms. is less than
all corresponding UT STDs in the SOLUTION/ESTIMATE block,
which are in turn two orders of magnitude greater than pre-
vious weekly UT STDs; e.g., .0279325 ms. for week 979.
STATION NAME/POINT CODES CHANGED IN ncl0985g.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.
MULTIPLY-USED 4-LETTER STATION NAME CODES IN FILE mit0985g.snx:
AREQ B 42202M005
AREQ A 42202M005
GALA A 42005M001
GALA B 42005M001
IISC A 22306M002
IISC B 22306M002
MDVO A 12309M001
MDVO B 12309M002
TROM B 10302M006
TROM A 10302M003
NYAL B 10317M003
NYAL A 10317M001
STATION NAME/POINT CODES CHANGED IN mit0985g.snx
ENFORCED FROM TEMPLATE FILE igs.snx .
Old New IERS
Code/Pt Code/Pt DOMES NO
------- ------- --------
MASP B MAS1 A 31303M002
MDVO B MDVO A 12309M002
TROM B TRO1 A 10302M006
NYAL B NYA1 A 10317M003
4 Changes in all.
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0985g.snx :
Stations: BRAZ KIT3 OHIG
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0985g.snx :
Stations: BRAZ KIT3 OHIG
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0985g.snx :
Stations: BRAZ HART KIT3 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
============= ====== ====== ======
42202M005 AREQ A AREQ B AREQ A
ARE1 A AREQ 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 HART B HARK A
HART A HARK A
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 MASP B MAS1 A
MASP A
31303M001 MAS1 A
12309M002 MDVO A MDVO B MDVO A
MDV1 A
12309M001 MDVO A
10317M003 NYA1 A NYAL B NYA1 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
10302M006 TRO1 A TROM B
12353M001 YAKA A YAKZ A YAKZ A
YAKZ A YAKA A
50107M004 YAR1 A YAR1 A YAR1 A
YAR2 A YAR2 A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
ALIC A BAKO 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 AMC2 A URUM 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:
cod09857.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09857.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa09857.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09857.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09857.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09857.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09857.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
30302M007 HART A HART B HART B HARK A HART B HARK A
12309M002 MDVO A MDVO B MDVO A
31303M002 MASP A MASP B MASP B MAS1 A MASP B MAS1 A
12353M001 YAKZ A YAKZ A YAKZ A
YAKA 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
22306M002 IISC A IISC B IISC A IISC A IISC B IISC A
42005M001 GALA A GALA A GALA B GALA A
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
12355M002 PETR A PETP A PETP A
12355M001 PETP A
13407S012 MADR A MAD2 A MADR A MAD2 A
22601M001 NTUS A NTUS A NTUS A NTUS A
22601M002 NTUS A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
URUM A RIOG A
MISSING IERS DOMES NOS AT SIO:
-----------------------------
INEG A AMC2 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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