[IGSREPORT-5688] Wk 0981 G-SINEX Comparisons
NRCan
NRCan
Fri Jan 22 13:58:53 PST 1999
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IGS Electronic Report Fri Jan 22 13:58:53 PST 1999 Message Number 5688
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Author: NRCan GSDivision
Subject: Wk 0981 G-SINEX Comparisons
Comparison of GNAAC Combined SINEX Solutions - Week 0981
(OCT 25, 1998 - OCT 31, 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:
jpl0981g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
mit0981g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ncl0981g.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))
jpl0981g.snx: BSHM .000 .000 .000 .000 .000 .000 .000 .000 .000
mit0981g.snx: BSHM .081 .000 -.001 .078 -.002 .004 .000 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0981g.snx: INEG .000 .000 .000 .000 .000 .000 .130 .000 .000
mit0981g.snx: INEG .081 .000 -.001 .078 -.002 .004 .066 .000 .000
- Unresolvable. No log file. Antenna parameters not listed in igs.snx.
jpl0981g.snx: MDVO .000 .000 .000 .000 .000 .000 .146 .000 .000
mit0981g.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.
mit0981g.snx: NYAL .110 .000 .000 .128 .000 .000 .000 .000 .000
- IERS DOMES NO 10317M001 should refer to NYAL (5.2160 M. eccentricity) and 10317M003
to NYA1 (0.0000 M. eccentricity). Yet JPL, NCL lists NYA1 A for 10317M003, while
MIT lists NYAL B for the same IERS DOMES NO. (See REMARKS below.)
jpl0981g.snx: PETP .110 .000 .000 .128 .000 .000 .080 .000 .000
mit0981g.snx: PETP .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 both PETP for 12355M001,
while MIT lists it for 12355M002.
jpl0981g.snx: HFLK .078 .000 .000 .096 .000 .000 .000 .000 .000
jpl0981g.snx: MONP .000 .000 .000 .000 .000 .000 .119 .000 .000
jpl0981g.snx: SUTH .000 .000 .000 .000 .000 .000 .119 .000 .000
mit0981g.snx: TROM .110 .000 .000 .128 .000 .000 .000 .000 .000
mit0981g.snx: WUHN .110 .000 .000 .128 .000 .000 2.320 .000 .000
FILE ncl0981g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0981g.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 mit0981g.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 69.3 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 70.8 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 MCM4 66.6 mm.
CONFIDENCE LEVEL FOR OUTLIER DETECTION : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
Lat HRAO JPL-MIT Lat HARK JPL-MIT Lat GOUG JPL-MIT
Lat HRAO MIT-NCL Lat HARK MIT-NCL Lat ASC1 MIT-NCL
Lat MALI MIT-NCL Lat AUCK MIT-NCL Lat MAC1 MIT-NCL
Lat CHAT MIT-NCL Lon DGAR JPL-MIT Lon COCO JPL-MIT
Lon OHIG MIT-NCL Lon COCO MIT-NCL Lon KERG MIT-NCL
Lon DAV1 MIT-NCL Lon DGAR MIT-NCL Hgt COCO JPL-MIT
Hgt CAGL JPL-MIT Hgt THU1 JPL-NCL Hgt ALBH JPL-NCL
Hgt COCO JPL-NCL Hgt ALBH MIT-NCL
125 GLOBAL STATIONS:
ALGO ALIC AMC2 AOML AREQ BAHR BISH BOGO BOGT BOR1
BRMU BRUS CAS1 CASA CEDU CHUR CRO1 DRAO DUBO EISL
ELAT FAIR FLIN FORT GILB GLSV GODE GOL2 GOLD GOPE
GRAS GRAZ GUAM HERS HOB2 HOFN HOLB IAVH IRKT JOZE
JPLM KABR KARR KATZ KELY KIRU KIT3 KOKB KOSG KOUR
KSTU KWJ1 LAMA LHAS LPGS MAD2 MADR MAG0 MAS1 MATE
MAW1 MDO1 MEDI METS MKEA NANO NICO NLIB NOTO NOUM
NRC1 NSSP NTUS NYA1 OBER ONSA PENC PERT PIE1 POL2
POTS PRDS QUIN RAMO REYK RIOG SANT SCH2 SELE SHAO
SJDV SOL1 STJO SUWN TAEJ TELA 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 ZECK ZIMM ZWEN
44 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 OHIG ONSA
PERT PIE1 POTS SANT SHAO THU1 TIDB TSKB VILL WES2
WTZR YAR1 YELL ZWEN
AVERAGE COORDINATE RMS USING ITRF96:
125 GLOBAL STATIONS 44 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
(mm) (mm) (mm) (mm) (mm) (mm)
------- ------- ------- ---------- ---------- ----------
Lat 0.8 1.1 1.0 5.4 4.8 4.9
Lon 1.5 1.0 1.8 6.0 6.0 5.9
Hgt 2.5 3.4 3.4 12.1 11.9 12.3
3D 3.0 3.7 4.0 14.6 14.2 14.5
VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):
125 GLOBAL STATIONS 44 FIDUCIAL STATIONS
JPL-MIT JPL-NCL MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
------- ------- ------- ---------- ---------- ----------
0.163 0.252 0.217 5.339 6.475 4.505
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 -7.5 1.9 -7.0 2.0 -1.2 3.1 -0.5 0.1
MIT -2.3 1.7 -7.4 1.8 -2.5 2.2 -0.4 0.1
NCL -7.8 3.0 -5.3 3.0 -7.7 4.1 -0.6 0.1
REMARKS:
FILE mit0981g.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:
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 mit0981g.snx
ENFORCED FROM TEMPLATE FILE igs.snx .
Old New IERS
Code/Pt Code/Pt DOMES NO
------- ------- --------
MASP B MAS1 A 31303M002
TROM B TRO1 A 10302M006
NYAL B NYA1 A 10317M003
3 Changes in all.
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0981g.snx :
Stations: BRAZ
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0981g.snx :
Stations: BRAZ
THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0981g.snx :
Stations: BRAZ HART HOB2 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
============= ====== ====== ======
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
MDV1 A
12309M001 MDVO A
10317M003 NYA1 A NYAL B NYA1 A
12355M001 PETP A
12355M002 PETP A
50103M108 TID2 A TIDB A TID2 A
TIDB A TID2 A TIDB A
10302M006 TRO1 A TROM B TRO1 A
10302M003 TROM A TROM A
12353M001 YAKA A YAKA A
YAKZ A YAKZ A
50107M004 YAR1 A YAR1 A YAR1 A
YAR2 A YAR2 A
MISSING IERS DOMES NOS AT JPL:
-----------------------------
ALIC 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 AMC2 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:
cod09817.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
emr09817.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
gfz09817.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
jpl09817.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
ngs09817.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
sio09817.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
(ENTRIES APPEAR ONLY WHERE ACS DIFFER.)
IERS DOMES NO COD NRCan GFZ JPL NGS SIO
============= ====== ====== ====== ====== ====== ======
22306M002 IISC A IISC A IISC A IISC B IISC A
50107M004 YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
31303M002 MASP A MASP B MAS1 A MAS1 A MASP B MAS1 A
12353M001 YAKZ A YAKA A YAKZ A
42202M005 AREQ A AREQ B AREQ A AREQ A AREQ B AREQ A
42005M001 GALA A GALA A GALA A GALA B GALA A
40405S031 GOLD A GOLD A GOL2 A GOL2 A GOLD B GOL2 A
50103M108 TIDB A TIDB A TID2 A TID2 A TIDB A TID2 A
30302M007 HART A HART B HARK A HARK A HART B HARK A
10317M003 NYAL A NYA1 A NYA1 A NYA1 A
10302M006 TROM A TRO1 A TRO1 A
10302M003 TROM A TROM A
13407S012 MAD2 A MADR A MAD2 A
22601M001 NTUS A NTUS A
22601M002 NTUS A
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
BISH A 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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