[IGSREPORT-5687] Wk 0980 G-SINEX Comparisons
NRCan
NRCan
Fri Jan 22 13:56:38 PST 1999
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IGS Electronic Report Fri Jan 22 13:56:38 PST 1999 Message Number 5687
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Author: NRCan GSDivision
Subject: Wk 0980 G-SINEX Comparisons
Subject: Wk 0980 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0980
(OCT 18, 1998 - OCT 24, 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:
jpl0980g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
mit0980g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0980g.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))
jpl0980g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit0980g.snx: INEG .081 .000 -.001 .078 -.002 .004 .066 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0980g.snx: HOFN .075 .002 -.001 .069 -.001 .002 .055 .000 .000
mit0980g.snx: HOFN .075 .002 -.001 .069 -.001 .002 .055 .000 .000
- Station log file indicates L1/L2 offset 0.0625 M., eccentricity 0.055 M.
Conflicts with igs.snx, igs_01.pcv L1/L2 offset 0.075, 0.069 M. for antenna
TRIMBLE TR GEOD L1/L2 GP.
jpl0980g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
mit0980g.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.
jpl0980g.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). JPL lists PETP wrongly for
12355M001.
mit0980g.snx: TAHI .110 .000 .000 .128 .000 .000 1.047 .000 .000
- IERS DOMES NO 92201M009 should refer to THTI (1.047 M. eccentricity)
and 92201M006 to TAHI (1.055 M. eccentricity). Yet MIT lists both THTI, TAHI
for 92201M009.
jpl0980g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
mit0980g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
- Both wrong. Should be L1/L2 offset, eccentricity 0.110, 0.128, 0.000 M. respectively.
jpl0980g.snx: HFLK .078 .000 .000 .096 .000 .000 .000 .000 .000
jpl0980g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0980g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0980g.snx: TROM .110 .000 .000 .128 .000 .000 2.369 .000 .000
mit0980g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
FILE ncl0980g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0980g.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 mit0980g.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 68.9 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 HOB2 -87.2 mm.
Hgt MCM4 73.8 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 HOB2 -85.0 mm.
Hgt MCM4 70.2 mm.
CONFIDENCE LEVEL FOR OUTLIER DETECTION : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat THTI JPL-NCL Lat YAKA JPL-NCL Lat ASC1 MIT-NCL
Lat YAKA MIT-NCL Lon DGAR JPL-MIT Lon HRAO JPL-MIT
Lon COCO JPL-MIT Lon HARK JPL-MIT Lon HRAO JPL-NCL
Lon COCO MIT-NCL Hgt THU1 JPL-MIT Hgt MALI JPL-MIT
Hgt YAKA JPL-NCL Hgt THU1 JPL-NCL Hgt YAKA MIT-NCL
132 GLOBAL STATIONS:
ALBH ALGO ALIC AMC2 AOML AREQ AUCK BAHR BAKO BISH
BOGO BOGT BOR1 BRMU BRUS CAGL CAS1 CASA CEDU CHAT
CHUR CRO1 DARW DAV1 DRAO DUBO EISL ELAT FAIR FLIN
FORT GILB GLSV GODE GOL2 GOLD GOPE GOUG GRAS GRAZ
GUAM HERS HOLB IAVH IRKT JOZE JPLM KABR KARR KATZ
KELY KERG KIRU KIT3 KOKB KOSG KOUR KSTU KWJ1 LAMA
LHAS LPGS MAC1 MAD2 MADR MAG0 MAS1 MATE MAW1 MDO1
MEDI METS MKEA NANO NICO NLIB NOTO NOUM NRC1 NSSP
NTUS NYA1 NYAL OBER OHIG ONSA PENC PERT PIE1 POL2
POTS PRDS QUIN RAMO REYK RIOG SANT SCH2 SELE SHAO
SJDV SOL1 STJO SUWN TAEJ TELA TID2 TIDB TOUL TOW2
TSKB UCLU UPAD URUM USNA USNO USUD VESL VILL WES2
WHIT WILL WSLR WSRT WTZR XIAN YAKZ YAR1 YAR2 YELL
ZECK ZWEN
44 FIDUCIAL STATIONS:
ALGO AREQ BAHR BRMU CAS1 DAV1 DRAO FAIR FORT GODE
GRAZ GUAM IRKT KERG KIT3 KOKB KOSG KOUR KWJ1 LHAS
MAC1 MAD2 MALI MAS1 MATE MDO1 NLIB NYAL OHIG ONSA
PERT PIE1 POTS SANT SHAO THU1 TIDB TSKB VILL WES2
WTZR YAR1 YELL ZWEN
AVERAGE COORDINATE RMS USING ITRF96:
132 GLOBAL STATIONS 44 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.1 1.4 0.9 5.4 5.3 5.4
Lon 1.3 1.4 1.1 6.2 6.0 6.0
Hgt 2.0 2.3 2.0 10.7 12.5 12.4
3D 2.6 3.0 2.5 13.4 14.9 14.8
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
132 GLOBAL STATIONS 44 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.107 0.157 0.086 5.291 7.069 4.544
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 -11.1 2.5 -12.2 2.6 -3.8 3.5 -0.4 0.1
MIT -6.1 1.7 -8.6 1.8 -5.4 2.2 -0.4 0.1
NCL -10.5 3.0 -8.1 3.1 -11.2 4.4 -0.4 0.1
REMARKS:
FILE mit0980g.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 ncl0980g.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 mit0980g.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 mit0980g.snx
ENFORCED FROM TEMPLATE FILE igs.snx .
Old New IERS
Code/Pt Code/Pt DOMES NO
------- ------- --------
MASP B MAS1 A 31303M002
NYAL B NYA1 A 10317M003
2 Changes in all.
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0980g.snx :
Stations: BRAZ
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0980g.snx :
Stations: BRAZ
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0980g.snx :
Stations: BRAZ HART HOB2 MAD2
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
12355M001 PETP A
12355M002 PETP A
92201M009 THTI A THTI A THTI A
TAHI 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 YAR2 A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
ALIC A BAKO A BISH A DARW 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 BISH A KATZ A GILB A KABR A ELAT A TELA A
RAMO A
SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN ABBREVIATED .ssc FILES:
cod09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09807.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
============= ====== ====== ====== ====== ====== ====== ======
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
22306M002 IISC A IISC B IISC A IISC A IISC B IISC A
50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 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
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
12353M001 YAKZ A YAKA A YAKZ A
YAKZ A
92201M009 TAHI A THTI A THTI A THTI A
42005M001 GALA A GALA A GALA B GALA A
13407S012 MADR A MAD2 A MADR A MAD2 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 SIO:
-----------------------------
INEG A AMC2 A KATZ A GILB A KABR 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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