Subject: [IGSREPORT-5399] Wk 0975 G-SINEX Comparisons
From: AC Coordinator / NRCan GSDivision
Date: Fri, 9 Oct 1998 8:28:47 PDT

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IGS Electronic Report    Fri Oct  9  8:28:47 PDT 1998      Message Number 5399
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0975 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0975   
(SEP 13, 1998 - SEP 19, 1998)

Contacts: J. Kouba ([email-masked])
          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:
   jpl0975g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0975g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0975g.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))

jpl0975g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0975g.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.

jpl0975g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0975g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0975g.snx: TROM    .078   .000   .000   .096   .000   .000  2.475   .000   .000

FILE ncl0975g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0975g.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 mit0975g.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 HOB2   82.6 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   80.4 mm.

IN SITE/ID BLOCK, JPL HART A REFERS TO IERS DOMES NO. 30302M007.
SO THE FOLLOWING CORRECTIONS WERE APPLIED TO CONVERT TO HART A 30302M002:
   dx/dy/dz: .145 M.,  .374 M.,  .623 M.

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   90.2 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat HARK JPL-MIT   Lat TOW2 JPL-MIT   Lat TIDB JPL-MIT
   Lat MAC1 JPL-MIT   Lat COCO JPL-MIT   Lat CEDU JPL-MIT
   Lat ALIC JPL-MIT   Lat NTUS JPL-MIT   Lat PERT JPL-MIT
   Lat KARR JPL-MIT   Lat DGAR JPL-MIT   Lat YAR1 JPL-MIT
   Lat TID2 JPL-MIT   Lat OHIG MIT-NCL   Lon MALI JPL-MIT
   Lon KWJ1 JPL-MIT   Lon COCO JPL-MIT   Lon MAS1 JPL-MIT
   Lon HARK JPL-MIT   Lon BOGT JPL-MIT   Lon FORT JPL-MIT
   Lon LPGS JPL-MIT   Lon TRO1 JPL-MIT   Lon MDVO JPL-NCL
   Lon MAS1 MIT-NCL   Lon BOGT MIT-NCL   Lon MALI MIT-NCL
   Hgt CAS1 JPL-MIT   Hgt JPLM JPL-MIT   Hgt NTUS JPL-MIT
   Hgt RCM6 JPL-MIT   Hgt COCO JPL-MIT   Hgt MDVO JPL-MIT
   Hgt MDVO JPL-NCL          

113 GLOBAL STATIONS:
   ALBH ALGO AMCT AREQ ASC1 AUCK BAHR BAKO BARB BOGO
   BOR1 BRMU BRUS CAGL CASA CHAT CHUR CRO1 DAV1 DRAO
   DUBO EBRE EISL ELAT FAIR GILB GLSV GODE GOL2 GOLD
   GOPE GRAS GRAZ GUAM HERS HOFN HOLB IRKT JOZE KABR
   KATZ KELY KERG KIRU KIT3 KOKB KOSG KOUR KSTU LAMA
   LHAS MAD2 MADR MAG0 MATE MAW1 MCM4 MDO1 MEDI METS
   MKEA NANO NICO NLIB NOTO NOUM NRC1 NSSP NYA1 NYAL
   OBER ONSA PENC PETR PIE1 POL2 POTS PRDS QUIN RAMO
   RICH SANT SCH2 SHAO SJDV SOL1 STJO SUWN TAEJ TELA
   THTI THU1 TOUL TSKB UCLU UPAD USNA USNO USUD VILL
   WES2 WHIT WILL WSLR WSRT WTZR WUHN XIAN YAKA YELL
   ZECK ZIMM ZWEN       

43 FIDUCIAL STATIONS:
   ALGO AREQ BRMU DAV1 DRAO FAIR FORT GODE GOL2 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 TID2 TSKB VILL WES2 WTZR
   YAR1 YELL ZWEN       

AVERAGE COORDINATE RMS USING ITRF96:

            113    GLOBAL  STATIONS         43   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.6       0.8       2.2        4.1        4.3        4.4 
Lon        1.5       0.7       1.7        5.2        6.5        5.5 
Hgt        4.3       2.7       4.2       10.4       12.4       11.9 
3D         4.8       2.9       5.1       12.3       14.7       13.9

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

       129    GLOBAL  STATIONS         43   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.642     0.225     0.363      3.191      3.724      2.994

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      -6.0     2.2   -14.1     2.2   -10.1     2.9         0.4      0.1
MIT      -5.4     2.5    -5.8     2.5    -4.1     3.9        -0.6      0.2
NCL      -4.3     3.1   -11.5     3.2    -7.4     4.4         0.2      0.2

REMARKS:
 STATION NAME/POINT CODES CHANGED IN ncl0975g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx at cddis.gsfc.nasa.gov.

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
YAKZ  A YAKA  A 12353M001

      1 Change  in all.

 STATION NAME/POINT CODES CHANGED IN mit0975g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx at cddis.gsfc.nasa.gov.

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
YAKZ  A YAKA  A 12353M001
TROM  B TRO1  A 10302M006
NYAL  B NYA1  A 10317M003

      3 Changes in all.

 STATION NAME/POINT CODES CHANGED IN jpl0975g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx at cddis.gsfc.nasa.gov.

    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 jpl0975g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0975g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0975g.snx :
   Stations: BRAZ HART 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        MDVO A
              MDV1 A              
    12309M001        MDVO A       
    10317M003 NYA1 A NYAL B       
    40499S020 RCM6 A RICH A RCM6 A
              RICH A RCM6 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              
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  ALIC A  BAKO A  BISH A  ELAT A  GILB 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:
-----------------------------
  BAKO 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:
 cod09757.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09757.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09757.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09757.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09757.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09757.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09757.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
    31303M002 MASP A MASP B MASP B MAS1 A MAS1 A MASP B MAS1 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
    40499S020 RICH A               RCM6 A        RCM6 A RCM6 A
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ 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
    30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
    10302M006 TROM A               TRO1 A                     
    22601M001        NTUS A NTUS A NTUS A NTUS A        NTUS A
    22601M002                                    NTUS 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:
-----------------------------
  BAKO A  KATZ A  GILB A  KABR A  ELAT A  TELA A  RAMO A

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

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