Subject: [IGSREPORT-5440] Wk 0976 G-SINEX Comparisons
From: AC Coordinator / NRCan GSDivision
Date: Fri, 23 Oct 1998 6:27:56 PDT

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IGS Electronic Report    Fri Oct 23  6:27:56 PDT 1998      Message Number 5440
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0976 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0976   
(SEP 20, 1998 - SEP 26, 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:
   jpl0976g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0976g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0976g.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))

mit0976g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
ncl0976g.snx: SUTH    .110   .000   .000   .128   .000   .000   .119   .000   .000
   - Both wrong. Should be L1/L2 offset. eccentricity 0.110, 0.128, 0.119 M. respectively.

jpl0976g.snx: TAHI    .110   .000   .000   .128   .000   .000  1.055   .000   .000
mit0976g.snx: TAHI    .110   .000   .000   .128   .000   .000  1.047   .000   .000
   - JPL refers to IERS DOMES No. 92201M006, MIT to 92201M009.
     However, the proper call sign for 92201M009 should be THTI.

jpl0976g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
ncl0976g.snx: HRAO    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0976g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0976g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0976g.snx: TROM    .078   .000   .000   .096   .000   .000  2.475   .000   .000

FILE ncl0976g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0976g.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 mit0976g.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 MIT
DUE TO DIFFERENCES IN EXCESS OF 55 mm. WITH ITRF96
AFTER 7-PARAMETER TRANSFORMATION TO ITRF96
 Hgt HOB2  145.3 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  149.8 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat YAR1 JPL-MIT   Lat TIDB JPL-MIT   Lat MAC1 JPL-MIT
   Lat TID2 JPL-MIT   Lat TIDB MIT-NCL   Lat ASC1 MIT-NCL
   Lat YAR1 MIT-NCL   Lat PERT MIT-NCL   Lat OHIG MIT-NCL
   Lon ASC1 JPL-MIT   Lon KWJ1 JPL-MIT   Lon MALI JPL-MIT
   Lon RCM6 JPL-MIT   Lon CHAT JPL-MIT   Lon MAS1 JPL-MIT
   Lon HARK JPL-MIT   Lon AUCK JPL-MIT   Lon CAS1 JPL-MIT
   Lon YAKA MIT-NCL   Lon AUCK MIT-NCL   Lon KWJ1 MIT-NCL
   Lon CHAT MIT-NCL   Lon ASC1 MIT-NCL   Lon MAS1 MIT-NCL
   Hgt THU1 JPL-MIT   Hgt MAW1 JPL-MIT   Hgt NTUS JPL-MIT
   Hgt COCO JPL-MIT   Hgt MDVO JPL-MIT   Hgt MDVO JPL-NCL
   Hgt COCO MIT-NCL          

121 GLOBAL STATIONS:
   ALBH ALGO ALIC AMCT ANKR AREQ BAHR BAKO BARB BOGO
   BOGT BOR1 BRMU BRUS CAGL CEDU CHUR CRO1 DAV1 DGAR
   DRAO DUBO EISL ELAT FAIR FLIN FORT GILB GLSV GODE
   GOL2 GOLD GOPE GOUG GRAS GRAZ GUAM HERS HOFN HOLB
   IAVH IRKT JOZE JPLM KABR KARR KATZ KELY KERG KIRU
   KIT3 KOKB KOSG KOUR KSTU LAMA LHAS LPGS MAD2 MADR
   MAG0 MATE 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 SELE
   SHAO SJDV SOL1 STJO SUWN TAEJ TELA THTI TOUL TOW2
   TRO1 TSKB UCLU UPAD USNA USNO USUD VILL WES2 WHIT
   WILL WSLR WSRT WTZR WUHN XIAN YAKZ 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:

            121    GLOBAL  STATIONS         43   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.8       1.0       2.5        5.4        4.8        5.8 
Lon        1.2       0.9       1.2        5.5        6.4        5.9 
Hgt        4.1       2.5       4.8       10.4       12.4       11.6 
3D         4.6       2.8       5.6       12.9       14.8       14.2

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

       133    GLOBAL  STATIONS         43   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.438     0.128     0.447      3.172      3.868      2.974

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      -5.4     2.7   -12.1     2.7   -15.7     3.6         0.1      0.2
MIT      -6.1     2.2    -5.3     2.2    -7.5     3.4        -1.0      0.1
NCL      -3.8     3.2    -8.2     3.3   -15.9     4.6         0.1      0.2

REMARKS:
 STATION NAME/POINT CODES CHANGED IN ncl0976g.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.

 STATION NAME/POINT CODES CHANGED IN mit0976g.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 jpl0976g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0976g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0976g.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        MDVO A
              MDV1 A              
    12309M001        MDVO A       
    22601M001 NTUS A        NTUS A
    22601M002        NTUS A       
    10317M003 NYA1 A NYAL B       
    40499S020 RCM6 A RICH A RCM6 A
              RICH A RCM6 A       
    92201M006 TAHI A              
    92201M009 THTI A TAHI A       
                     THTI A       
    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 YAKZ A       
    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

SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN ABBREVIATED .ssc FILES:
 cod09767.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09767.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09767.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09767.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09767.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09767.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09767.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
    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
    42005M001 GALA A               GALA A GALA A GALA B GALA A
    12309M002 MDVO A        MDVO B        MDVO A        MDVO A
    12353M001 YAKZ A                      YAKA A        YAKZ A
                                          YAKZ 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
    50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
    22601M001 NTUS A        NTUS A NTUS A NTUS A        NTUS A
    22601M002                                    NTUS A       
    92201M009 TAHI A                                    THTI A
    10302M006 TROM A               TRO1 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

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

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