[IGSREPORT-5691] Wk 0984 G-SINEX Comparisons
NRCan
NRCan
Fri Jan 22 14:03:20 PST 1999
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IGS Electronic Report Fri Jan 22 14:03:20 PST 1999 Message Number 5691
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Author: NRCan GSDivision
Subject: Wk 0984 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0984
(NOV 15, 1998 - NOV 21, 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:
jpl0984g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
mit0984g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0984g.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))
jpl0984g.snx: BSHM .000 .000 .000 .000 .000 .000 .000 .000 .000
mit0984g.snx: BSHM .081 .000 -.001 .078 -.002 .004 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0984g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit0984g.snx: INEG .081 .000 -.001 .078 -.002 .004 .066 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0984g.snx: PETP .110 .000 .000 .128 .000 .000 .080 .000 .000
mit0984g.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 for 12355M001,
while MIT, NCL list it for 12355M002.
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.
jpl0984g.snx: TROM .110 .000 .000 .128 .000 .000 2.369 .000 .000
mit0984g.snx: TROM .110 .000 .000 .128 .000 .000 .000 .000 .000
- IERS DOMES NO 10302M003 should refer to TROM (2.4750 M. eccentricity) and 10302M006
to TRO1 (0.0000 M. eccentricity). Yet JPL, NCL lists TRO1 A for 10302M006, while
MIT lists TROM B for the same IERS DOMES NO.
jpl0984g.snx: HFLK .078 .000 .000 .096 .000 .000 .000 .000 .000
jpl0984g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0984g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0984g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
jpl0984g.snx: ZIMM .078 .000 -.003 .074 -.003 -.001 .000 .000 .000
FILE ncl0984g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0984g.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 mit0984g.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 67.9 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 MCM4 73.7 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 70.3 mm.
CONFIDENCE LEVEL FOR OUTLIER DETECTION : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat BAKO JPL-MIT Lat YAR2 JPL-MIT Lat CAS1 JPL-MIT
Lat HRAO MIT-NCL Lat HARK MIT-NCL Lat KERG MIT-NCL
Lon BAKO JPL-MIT Lon CHAT JPL-MIT Lon COCO JPL-MIT
Lon ASC1 MIT-NCL Lon DGAR MIT-NCL Hgt HARK JPL-MIT
Hgt KWJ1 JPL-MIT Hgt NTUS JPL-MIT Hgt COCO JPL-MIT
Hgt HRAO JPL-NCL Hgt NTUS JPL-NCL Hgt KERG MIT-NCL
Hgt COCO MIT-NCL Hgt HRAO MIT-NCL Hgt MALI MIT-NCL
127 GLOBAL STATIONS:
ALBH ALGO ALIC AMC2 AOML AREQ AUCK BAHR BOGO BOGT
BOR1 BRMU BRUS CAGL CASC CEDU CHUR CRO1 DAV1 DRAO
DUBO EISL ELAT FAIR FLIN FORT GILB GLSV GODE GOL2
GOLD GOPE GOUG GRAS GRAZ GUAM HERS HOB2 HOFN HOLB
IAVH IRKT JOZE JPLM KABR KARR KATZ KELY KIRU KIT3
KOKB KOSG KOUR KSTU LAMA LHAS LPGS MAC1 MAD2 MADR
MAG0 MAS1 MATE MAW1 MDO1 MEDI METS MKEA NANO NLIB
NOTO NOUM NRC1 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 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 YELL ZECK ZWEN
45 FIDUCIAL STATIONS:
ALGO AREQ BAHR BRMU CAS1 DAV1 DRAO FAIR FORT GODE
GRAZ GUAM HOB2 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:
127 GLOBAL STATIONS 45 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 1.3 1.0 1.0 6.2 5.3 5.8
Lon 1.4 1.2 1.6 7.0 6.2 6.3
Hgt 2.1 2.3 2.7 12.6 12.3 12.6
3D 2.8 2.8 3.2 15.7 14.8 15.2
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
135 GLOBAL STATIONS 45 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.177 0.183 0.283 6.588 7.927 5.628
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 -3.1 1.6 -3.8 1.6 3.1 1.9 -0.4 0.1
MIT -3.4 1.4 -5.1 1.4 2.3 1.6 -0.5 0.1
NCL -8.6 2.8 -8.1 2.6 5.3 4.1 -0.7 0.1
REMARKS:
FILE mit0984g.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 ncl0984g.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 mit0984g.snx:
AREQ B 42202M005
AREQ A 42202M005
GALA A 42005M001
GALA B 42005M001
IISC A 22306M002
IISC B 22306M002
TROM A 10302M003
TROM B 10302M006
NYAL B 10317M003
NYAL A 10317M001
STATION NAME/POINT CODES CHANGED IN mit0984g.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 jpl0984g.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 jpl0984g.snx :
Stations: BRAZ
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0984g.snx :
Stations: BRAZ
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0984g.snx :
Stations: BRAZ HART 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 A
12309M001 MDVO A
10317M003 NYA1 A NYAL B NYA1 A
12355M001 PETP A
12355M002 PETP A PETP A
50103M108 TID2 A TIDB A TID2 A
TIDB A TID2 A TIDB A
10302M006 TRO1 A TROM B TRO1 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:
cod09847.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09847.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
esa09847.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09847.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09847.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09847.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09847.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
============= ====== ====== ====== ====== ====== ====== ======
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 HART B HARK A
31303M002 MASP A MASP B MASP B 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
42005M001 GALA A GALA A GALA A GALA B GALA A
42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
10302M006 TROM A TRO1 A TRO1 A
13407S012 MADR A MAD2 A MADR A MAD2 A
12355M002 PETP A PETP A
12355M001 PETP 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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