Subject: [IGSREPORT-5652] Wk 0979 G-SINEX Comparisons
From: NRCan GSDivision
Date: Tue, 12 Jan 1999 7:53:25 PST

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IGS Electronic Report    Tue Jan 12  7:53:25 PST 1999      Message Number 5652
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Author: NRCan GSDivision
Subject: Wk 0979 G-SINEX Comparisons

Subject: Wk 0979 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0979   
(OCT 11, 1998 - OCT 17, 1998)

Contacts: D. Hutchison ([email-masked])
          R. Ferland ([email-masked])

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:
   jpl0979g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0979g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0979g.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))

jpl0979g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0979g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .066   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0979g.snx: HOFN    .075   .002  -.001   .069  -.001   .002   .055   .000   .000
mit0979g.snx: HOFN    .075   .002  -.001   .069  -.001   .002   .055   .000   .000
   - Both wrong. Should be L1/L2 offset 0.0625 M., eccentricity 0.055 M.
     Information for its antenna, TRIMBLE TR GEOD L1/L2 GP, not listed in igs.snx.

jpl0979g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0979g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
   - Both wrong. Should be L1/L2 offset, eccentricity 0.110, 0.128, 0.119 M. respectively.

jpl0979g.snx: TROM    .110   .000   .000   .128   .000   .000  2.369   .000   .000
ncl0979g.snx: TROM    .110   .000   .000   .128   .000   .000  2.369   .000   .000
   - Both wrong. Should be L1/L2 offset, eccentricity 0.078, 0.096, 2.475 M. respectively.

mit0979g.snx: CAGL    .110   .000   .000   .128   .000   .000   .010   .000   .000
jpl0979g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
mit0979g.snx: LAMA    .081   .000  -.001   .078  -.002   .004   .061   .000   .000
jpl0979g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0979g.snx: NOUM    .075   .002  -.001   .069  -.001   .002   .000   .000   .000

FILE ncl0979g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0979g.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 mit0979g.snx
   GALA Multiple Sites
   IISC Multiple Sites
 
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
   Stations: 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   65.5 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   67.8 mm.
 Hgt HOB2  114.1 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   63.0 mm.
 Hgt HOB2  114.9 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat MAC1 JPL-MIT   Lat COCO JPL-MIT   Lat TID2 JPL-MIT
   Lat MAC1 JPL-NCL   Lat TID2 JPL-NCL   Lon MDVO JPL-MIT
   Lon CAS1 JPL-MIT   Lon BOGT JPL-MIT   Lon NTUS JPL-MIT
   Lon AREQ JPL-NCL   Lon MAS1 JPL-NCL   Lon CHAT JPL-NCL
   Lon NTUS JPL-NCL   Lon CAS1 JPL-NCL   Lon BOGT JPL-NCL
   Hgt COCO JPL-MIT   Hgt MDVO JPL-MIT   Hgt DGAR JPL-NCL
   Hgt COCO JPL-NCL   Hgt WUHN MIT-NCL     

127 GLOBAL STATIONS:
   ALBH ALGO ALIC AMCT ANKR AOML ASC1 AUCK BAHR BAKO
   BISH BOGO BOR1 BRMU BRUS CASA CEDU CHUR CRO1 DARW
   DAV1 DRAO DUBO EISL ELAT FAIR FLIN FORT GILB GLSV
   GODE GOL2 GOLD GOPE GOUG GRAS GRAZ GUAM HARK HERS
   HOLB HRAO IRKT JOZE JPLM KABR KARR KATZ KELY KERG
   KIRU KIT3 KOKB KOSG KOUR KSTU KWJ1 LHAS LPGS MAD2
   MADR MAG0 MALI MATE MAW1 MDO1 MEDI METS MKEA NANO
   NICO NLIB NOTO NRC1 NSSP NYA1 NYAL OBER OHIG ONSA
   PENC PERT PIE1 POL2 POTS PRDS QUIN RAMO RIOG SANT
   SCH2 SELE SHAO SJDV SOL1 STJO SUWN TAEJ TELA THU1
   TIDB TOUL TOW2 TRO1 TSKB UCLU UPAD URUM USNA USNO
   USUD VESL VILL WES2 WHIT WILL WSLR WSRT WTZR XIAN
   YAKA YAKZ YAR1 YELL ZECK ZIMM 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:

            127    GLOBAL  STATIONS         44   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        0.9       0.9       0.5        5.7        5.8        5.9 
Lon        0.6       0.9       0.8        5.7        5.4        5.6 
Hgt        2.1       2.6       1.9       10.3       12.9       12.7 
3D         2.4       2.9       2.1       13.0       15.1       15.1

VARIANCE FACTORS WITH ITRF96 (CHI-SQUARE / (DEGREES OF FREEDOM)):

       138    GLOBAL  STATIONS         44   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.134     0.120     0.095      5.075      7.729      4.989

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      -3.9     1.2    -2.7     1.2    -1.5     3.4        -0.5      0.1
MIT      -2.1     1.8    -9.1     1.8   -10.1     2.5        -0.6      0.1
NCL       0.8     3.1    -9.9     3.1    -6.1     4.5        -0.6      0.1

REMARKS:

 MULTIPLY-USED 4-LETTER STATION NAME CODES:
   GALA  A 42005M001
   GALA  B 42005M001
   IISC  A 22306M002
   IISC  B 22306M002
   TROM  B 10302M006
   TROM  A 10302M003
   NYAL  B 10317M003
   NYAL  A 10317M001

 STATION NAME/POINT CODES CHANGED IN mit0979g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
TROM  B TRO1  A 10302M006
NYAL  B NYA1  A 10317M003

      2 Changes in all.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0979g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0979g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0979g.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 A AREQ A
              ARE1 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 HARK A HARK A
              HART A HART B       
              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        MAS1 A
              MASP A              
    31303M001        MAS1 A       
    12309M002 MDVO A              
              MDV1 A              
    12309M001        MDVO A       
    10317M003 NYA1 A NYAL B       
    50103M108 TID2 A TIDB A TID2 A
              TIDB A TID2 A TIDB A
    10302M006 TRO1 A TROM B       
    12353M001 YAKA A YAKA A       
              YAKZ A YAKZ A       
    50107M004 YAR1 A YAR1 A YAR1 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  BAKO A  URUM A  BISH A  KATZ A  GILB A  KABR A  ELAT A  TELA A

SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN ABBREVIATED .ssc FILES:
 cod09797.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09797.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09797.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09797.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09797.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09797.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09797.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
    22306M002 IISC A        IISC B IISC A IISC A IISC B IISC 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        MASP B MAS1 A
    12353M001 YAKZ A                      YAKA A        YAKZ A
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
    12309M002 MDVO A        MDVO B        MDVO A        MDVO 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
    22601M001 NTUS A        NTUS A NTUS A NTUS A        NTUS A
    22601M002                                    NTUS A       
    42005M001 GALA A               GALA A GALA A GALA B GALA A
    13407S012               MADR A        MAD2 A MADR A MAD2 A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH A  URUM A  RIOG A
 
MISSING IERS DOMES NOS AT SIO:
-----------------------------
  INEG A  BAKO A  KATZ A  GILB A  KABR A  ELAT A  TELA A

-- 
David Hutchison
Geodetic Survey of Canada
Ottawa, Ontario, Canada
Internet: [email-masked]

[Mailed From: David Hutchison <[email-masked]>]