Subject: [IGSREPORT-5898] Wk 0997 G-SINEX Comparisons
From: NRCan GSDivision
Date: Wed, 24 Mar 1999 6:48:12 PST

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IGS Electronic Report    Wed Mar 24  6:48:12 PST 1999      Message Number 5898
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Author: NRCan GSDivision
Subject: Wk 0997 G-SINEX Comparisons

Subject: Wk 0997 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0997   
(FEB 14, 1999 - FEB 20, 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    *** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED.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:
   jpl0997g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0997g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0997g.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))

jpl0997g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.676   .000   .000
mit0997g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0997g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
mit0997g.snx: BISH    .110   .000   .000   .128   .000   .000   .085   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0997g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0997g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0997g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0997g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .100   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

mit0997g.snx: TIXI    .108   .000   .000   .128   .001   .002   .079   .000   .000
   - According to igs_01.pcv, DORNE MARGOLIN ASH antenna should have L1/L2 vertical offset
     0.110, 0.128 M. respectively with 0.0 L1/L2 offset north and east. This leaves MIT
     slightly off (but < 3 mm. in all offsets).

jpl0997g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
jpl0997g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
jpl0997g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0997g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0997g.snx: TROM    .078   .000   .000   .096   .000   .000  2.369   .000   .000

FILE ncl0997g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0997g.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-NCL   Lat SANT JPL-NCL   Lat OHIG JPL-NCL
   Lat BOGT MIT-NCL   Lon MALI JPL-NCL   Lon HARK JPL-NCL
   Lon DGAR JPL-NCL   Lon MALI MIT-NCL   Hgt GOUG JPL-MIT
   Hgt HRAO JPL-MIT   Hgt HARK JPL-MIT   Hgt COCO JPL-MIT
   Hgt WUHN JPL-NCL   Hgt COCO MIT-NCL   Hgt HRAO MIT-NCL
   Hgt BOGT MIT-NCL          

130 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 ANKR AOML ASC1 AUCK BAHR BOGO
   BOR1 BRMU BRUS CAGL CAS1 CASC CAT1 CEDU CHAT CHUR
   CRO1 DAV1 DRAO DUBO EISL ELAT FAIR FLIN FORT GILB
   GLSV GODE GOL2 GOLD GOPE GRAS GRAZ GUAM HARV HERS
   HFLK HOB2 HOFN HOLB IISC IRKT JOZE JPLM KABR KARR
   KATZ KELY KIRU KOKB KOSG KOUR KSTU KUNM KWJ1 LAMA
   MAC1 MAD2 MADR MAG0 MAS1 MATE MAW1 MCM4 MDO1 MEDI
   MKEA NANO NLIB NOTO NOUM NRC1 NTUS NYA1 NYAL OBER
   ONSA PENC PERT PETP PIE1 POL2 POTS PRDS QUIN RAMO
   RIOG SCH2 SELE SFER SHAO SJDV SOL1 STJO SUWN TAEJ
   TELA THU1 TID2 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

42 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 NYAL OHIG ONSA PERT PIE1
   POTS SANT SHAO THU1 TIDB TSKB VILL WES2 WTZR YAR1
   YELL ZWEN        

AVERAGE COORDINATE RMS USING ITRF96:

            130    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.0       1.2       1.2        5.1        5.1        4.6 
Lon        1.1       3.5       3.5       10.4       10.2        7.0 
Hgt        3.0       3.6       4.7       15.8       17.3       15.7 
3D         3.4       5.2       6.0       19.6       20.7       17.8

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

       138    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.220     0.071     0.357     13.226     24.546      5.950

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     2.1    -0.2     2.1    -3.3     2.8        -1.0      0.1
MIT       2.7     1.4     3.1     1.4    -4.4     1.8        -0.7      0.1
NCL       6.5     3.1    -4.0     2.9   -18.4     4.3        -0.8      0.1

REMARKS:

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0997g.snx :
   Stations: AREQ BRAZ KERG KIT3 LHAS

FOR THE FILE mit0997g.snx, UT WAS DELETED & THE A PRIORI COVARIANCE MATRIX 
WAS SCALED UPWARD (ALL ELEMENTS) BY A FACTOR OF 0.0005% PRIOR TO DECONSTRAINING.
(NOTE: PREVIOUS WEEKS USED FACTOR OF 0.05%. IT IS NOTICED THAT THE SMALLER
FACTOR CAUSES NO CHANGE IN ANY OF THE ABOVE RESULTS.)

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0997g.snx :
   Stations: AREQ BRAZ HART KERG KIT3 LHAS

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0997g.snx :
   Stations: AREQ BRAZ HART KERG KIT3 LHAS 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
============= ====== ====== ======
    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
              MASP 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 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  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  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:
 cod09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09977.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09977.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
    31303M002 MASP A MASP B MASP B MAS1 A MAS1 A MASP B MAS1 A
    12355M002 PETR A               PETP A PETP A        PETP A
    12353M001 YAKZ A                      YAKA A YAKA A YAKZ A
    40472S004 AMCT A                                    AMC2 A
    40472S003                             AMC2 A              
    50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TID2 A
    30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
    10302M006 TROM A               TRO1 A TRO1 A        TRO1 A
    40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD B GOL2 A
    13407S012               MADR A        MAD2 A MADR A MAD2 A
    22306M002               IISC B IISC A        IISC B IISC A
    22601M001               NTUS A 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:
-----------------------------
  INEG A  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]>]