[IGSREPORT-5695] Wk 0986 G-SINEX Comparisons
NRCan
NRCan
Fri Jan 22 14:05:56 PST 1999
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IGS Electronic Report Fri Jan 22 14:05:56 PST 1999 Message Number 5695
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Author: NRCan GSDivision
Subject: Wk 0986 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0986
(NOV 29, 1998 - DEC 5, 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:
jpl0986g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
mit0986g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0986g.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))
jpl0986g.snx: BSHM .000 .000 .000 .000 .000 .000 .000 .000 .000
mit0986g.snx: BSHM .081 .000 -.001 .078 -.002 .004 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0986g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit0986g.snx: INEG .081 .000 -.001 .078 -.002 .004 .066 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0986g.snx: PETP .110 .000 .000 .128 .000 .000 .080 .000 .000
mit0986g.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.
jpl0986g.snx: PETR .110 .000 .000 .128 .000 .000 .080 .000 .000
mit0986g.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.
jpl0986g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
mit0986g.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. Antenna EXT. L1/L2 KINEMATIC SSE listed in log file, but not igs.snx.
jpl0986g.snx: HFLK .078 .000 .000 .096 .000 .000 .000 .000 .000
jpl0986g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0986g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0986g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
FILE ncl0986g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0986g.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 mit0986g.snx
MAS1 Multiple Sites
AREQ Multiple Sites
GALA Multiple Sites
IISC Multiple Sites
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
Stations: MAS1 AREQ 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 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 64.7 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 62.0 mm.
CONFIDENCE LEVEL FOR OUTLIER DETECTION : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat HARK JPL-MIT Lat SELE JPL-MIT Lat SELE JPL-NCL
Lat HRAO MIT-NCL Lat HARK MIT-NCL Lat GOUG MIT-NCL
Lat KERG MIT-NCL Lat DGAR MIT-NCL Lat COCO MIT-NCL
Lon COCO JPL-MIT Lon DGAR JPL-NCL Lon DGAR MIT-NCL
Lon CAS1 MIT-NCL Lon COCO MIT-NCL Lon KERG MIT-NCL
Lon DAV1 MIT-NCL Hgt WUHN JPL-MIT Hgt LPGS JPL-MIT
Hgt COCO JPL-MIT Hgt HARK JPL-MIT Hgt SELE JPL-MIT
Hgt HARK MIT-NCL Hgt GOUG MIT-NCL Hgt COCO MIT-NCL
Hgt LPGS MIT-NCL Hgt WUHN MIT-NCL
127 GLOBAL STATIONS:
ALBH ALGO ALIC AMC2 ANKR AOML AREQ ASC1 AUCK BAHR
BOGO BOGT BOR1 BRMU BRUS CAGL CASC CEDU CHAT CHUR
CRO1 DRAO DUBO EISL ELAT FAIR FLIN FORT GILB GLSV
GODE GOL2 GOLD GOPE GRAS GRAZ GUAM HERS HOB2 HOFN
HOLB IRKT JOZE JPLM KABR KARR KATZ KELY KIRU KIT3
KOKB KOSG KOUR KSTU KWJ1 LAMA MAC1 MAD2 MADR MAG0
MALI MAS1 MATE MAW1 MDO1 MEDI METS NANO NLIB NOTO
NOUM NRC1 NSSP NTUS NYA1 NYAL OBER ONSA PENC PERT
PIE1 POL2 POTS PRDS QUIN RAMO REYK RIOG SANT SCH2
SHAO SJDV SOL1 STJO SUWN TAEJ TELA THTI THU1 TID2
TIDB TIXI TOUL TOW2 TRO1 TSKB UCLU UPAD URUM USNA
USNO USUD VESL VILL WES2 WHIT WILL WSLR WSRT WTZR
XIAN YAKA YAR1 YAR2 YELL ZECK ZWEN
43 FIDUCIAL STATIONS:
ALGO AREQ BAHR BRMU CAS1 DAV1 DRAO FAIR FORT GODE
GRAZ GUAM HOB2 IRKT KERG KIT3 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:
127 GLOBAL STATIONS 43 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 0.9 0.8 0.9 6.0 5.6 5.7
Lon 1.1 0.7 1.1 7.4 7.1 7.1
Hgt 1.8 1.5 2.6 13.9 14.7 14.5
3D 2.3 1.8 3.0 16.9 17.2 17.2
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
133 GLOBAL STATIONS 43 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.083 0.034 0.174 7.123 9.761 6.540
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 -2.4 2.0 -7.0 2.0 -1.3 2.7 -0.4 0.1
MIT -0.7 1.5 -6.9 1.6 -5.0 1.8 -0.4 0.1
NCL -5.0 3.0 -14.0 2.8 -4.4 4.4 -0.5 0.1
REMARKS:
FILE mit0986g.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.
MULTIPLY-USED 4-LETTER STATION NAME CODES IN FILE mit0986g.snx:
AREQ B 42202M005
AREQ A 42202M005
GALA A 42005M001
GALA B 42005M001
IISC A 22306M002
IISC B 22306M002
NYAL B 10317M003
NYAL A 10317M001
STATION NAME/POINT CODES CHANGED IN mit0986g.snx
ENFORCED FROM TEMPLATE FILE igs.snx .
Old New IERS
Code/Pt Code/Pt DOMES NO
------- ------- --------
MASP B MAS1 A 31303M002
YAKZ A YAKA A 12353M001
TROM B TRO1 A 10302M006
NYAL B NYA1 A 10317M003
4 Changes in all.
STATION NAME/POINT CODES CHANGED IN jpl0986g.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 jpl0986g.snx :
Stations: BRAZ LHAS OHIG TROM
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0986g.snx :
Stations: BRAZ LHAS OHIG
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0986g.snx :
Stations: BRAZ HART 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
============= ====== ====== ======
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
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
50107M004 YAR1 A YAR1 A YAR1 A
YAR2 A YAR2 A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
ALIC 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:
cod09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09867.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 HART B HARK A
31303M002 MASP A MASP B MASP B MAS1 A MASP B MAS1 A
12355M002 PETR A PETP A PETP A
12355M001 PETP 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 B AREQ B AREQ A AREQ A AREQ B AREQ A
13407S012 MADR A MAD2 A MADR A MAD2 A
22601M001 NTUS A NTUS A NTUS A NTUS A
22601M002 NTUS A
22306M002 IISC B IISC A IISC A IISC B IISC A
42005M001 GALA A GALA B GALA 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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