Subject: [IGSREPORT-5913] Wk 0998 G-SINEX Comparisons
From: NRCan GSDivision
Date: Tue, 30 Mar 1999 8:33:43 PST

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IGS Electronic Report    Tue Mar 30  8:33:43 PST 1999      Message Number 5913
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Author: NRCan GSDivision
Subject: Wk 0998 G-SINEX Comparisons

Subject: Wk 0998 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0998   
(FEB 21, 1999 - FEB 27, 1999)

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.

    *** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED. ***

FILES COMPARED:
   jpl0998g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0998g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0998g.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))

jpl0998g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.676   .000   .000
mit0998g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0998g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
mit0998g.snx: BISH    .110   .000   .000   .128   .000   .000   .085   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0998g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0998g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0998g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0998g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .100   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0998g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
mit0998g.snx: MDVO    .069   .000   .000   .069   .000   .000   .146   .000   .000
   - Both wrong. Latest log file (mdvo9902.log) gives antenna as 4000ST L1/L2 GEOD W/O GP,
     presumably matching igs_01.pcv's  4000ST L1/L2 GEOD Mod. 14532 with L1/L2 offsets of
     0.078, 0.000, -0.003 M.  (up, north, east)  and 0.074, -0.003, -0.001 M.  (up, north,
     east).  L1/L2  offset 0.069 M.  does occur in antenna.gra for this antenna,  but the
     user is warned that  igs_01.pcv  should  take  precedence. However, the only graphic
     appearing in the above log file is for  TRIMBLE: 4000SSE L1/L2 KINEMATIC,  unchanged
     from previous log files.

jpl0998g.snx: TROM    .078   .000   .000   .096   .000   .000  2.369   .000   .000
mit0998g.snx: TROM    .110   .000   .000   .128   .000   .000   .000   .000   .000
   - Both wrong. Should be L1/L2 offset, eccentricity  0.078, 0.096, 2.475 M. respectively.

jpl0998g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
jpl0998g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0998g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0998g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000

FILE ncl0998g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0998g.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 
 
COORDINATE DIFFERENCE THRESHOLD FOR STATION REJECTION: 55 mm.
(REFERS TO COORDINATE DIFFERENCE FROM ITRF96 AFTER 7-PARAMETER TRANSFORMATION)
CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat LPGS JPL-MIT   Lat DGAR JPL-MIT   Lat GOUG JPL-MIT
   Lat RIOG JPL-MIT   Lat OHIG JPL-MIT   Lat VESL JPL-MIT
   Lat OHIG MIT-NCL   Lon HOFN JPL-MIT   Lon HOFN JPL-NCL
   Lon ASC1 MIT-NCL   Hgt HARK JPL-MIT   Hgt CAGL JPL-MIT
   Hgt LPGS JPL-MIT   Hgt LPGS MIT-NCL   Hgt HRAO MIT-NCL
   Hgt COCO MIT-NCL   Hgt CRO1 MIT-NCL     

127 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 ANKR AOML AUCK BAHR BOGO BOGT
   BOR1 BRMU BRUS CAS1 CASC CEDU CHAT CHUR CIT1 DAV1
   DRAO DUBO EISL ELAT FAIR FLIN FORT GILB GLSV GODE
   GOL2 GOLD GOPE GRAS GRAZ GUAM HERS HFLK HOB2 HOLB
   IISC IRKT JOZE JPLM KABR KARR KATZ KELY KIRU KOKB
   KOSG KOUR KSTU KUNM KWJ1 LAMA MAC1 MAD2 MADR MAG0
   MALI MAS1 MATE MAW1 MCM4 MDO1 MEDI METS MKEA NANO
   NLIB NOTO NOUM NRC1 NTUS NYA1 OBER ONSA PENC PERT
   PETP PIE1 POL2 POTS PRDS RAMO REYK SANT SCH2 SELE
   SFER SHAO SJDV SOL1 STJO SUWN TAEJ TELA THU1 TID2
   TIDB TIXI TOUL TOW2 TRO1 TSKB UCLU UPAD URUM USNA
   USNO USUD VILL WES2 WHIT WILL WSLR WSRT WTZR XIAN
   YAKA YAKZ YAR1 YELL ZECK ZIMM ZWEN   

41 FIDUCIAL STATIONS:
   ALGO BAHR BRMU CAS1 DAV1 DRAO FAIR FORT GODE GRAZ
   GUAM HOB2 IRKT KOKB KOSG KOUR KWJ1 MAC1 MAD2 MALI
   MAS1 MATE MCM4 MDO1 NLIB OHIG ONSA PERT PIE1 POTS
   SANT SHAO THU1 TIDB TSKB VILL WES2 WTZR YAR1 YELL
   ZWEN         

AVERAGE COORDINATE RMS USING ITRF96:

            127    GLOBAL  STATIONS         41   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        0.8       1.0       1.2        5.1        5.2        4.5 
Lon        1.3       3.0       3.0        9.4        9.6        6.6 
Hgt        3.6       3.0       4.4       15.3       15.1       14.0 
3D         3.9       4.4       5.4       18.7       18.7       16.1

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

       135    GLOBAL  STATIONS         41   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.219     0.102     0.449     13.760     23.194      6.193

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       0.8     0.9    -1.0     0.9     0.3     0.9        -0.9      0.1
MIT       1.3     0.7    -1.2     0.7    -0.8     0.7        -0.6      0.1
NCL       5.5     2.7    -6.8     2.8     0.6     1.2        -0.9      0.1

REMARKS:

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0998g.snx :
   Stations: AREQ BRAZ KERG KIT3 LHAS

FOR THE FILE mit0998g.snx, UT WAS DELETED & THE A PRIORI COVARIANCE MATRIX 
WAS SCALED UPWARD (ALL ELEMENTS) BY 0.0005% PRIOR TO DECONSTRAINING.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0998g.snx :
   Stations: AREQ BRAZ HART KERG KIT3 LHAS

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0998g.snx :
   Stations: AREQ BRAZ HART KERG KIT3 LHAS MAD2 NYAL 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
============= ====== ====== ======
    40472S003 AMCT A              
              AMC2 A              
    40472S004        AMC2 A       
    40405S031 GOL2 A GOLD A GOL2 A
              GOLD A GOL2 A GOLD A
              GOL1 A              
    30302M007 HARK A HARK A HARK A
              HART A              
              HAR1 A              
    22306M002 IISC A IISC A IISC A
              IIS1 A              
    13407S012 MAD2 A MAD2 A       
              MADR A MADR A       
    31303M002 MAS1 A        MAS1 A
    31303M001        MAS1 A       
    12309M002 MDVO A        MDVO A
    12309M001        MDVO A       
    12355M001 PETR A              
    12355M002 PETP A PETP A PETP A
    50103M108 TID2 A TIDB A TID2 A
              TIDB A TID2 A TIDB A
    12353M001 YAKA A YAKZ A       
              YAKZ A YAKA A       
    50107M004 YAR1 A YAR1 A YAR1 A
              YAR2 A              
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  ALIC A  BAKO 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  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:
 cod09987.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09987.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09987.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09987.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09987.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09987.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09987.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
============= ====== ====== ====== ====== ====== ====== ======
    12353M001 YAKZ A                             YAKA A YAKZ A
    12355M002 PETR A               PETP A               PETP A
    40472S004 AMCT A                                    AMC2 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
    50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
    30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
    10302M006 TROM A               TRO1 A               TRO1 A
    10302M003               TROM A               TROM A       
    22306M002 IISC A        IISC B IISC A        IISC B IISC A
    31303M002        MASP B MASP B MAS1 A MAS1 A MASP B MAS1 A
    13407S012               MADR A        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 JPL:
-----------------------------
  RAMO A
 
MISSING IERS DOMES NOS AT NGS:
-----------------------------
  BAKO A
 
MISSING IERS DOMES NOS AT SIO:
-----------------------------
  KATZ A  GILB A  KABR A  BSHM A  ELAT A  TELA A

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

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