Subject: [IGSREPORT-5366] Wk 0971 G-SINEX Comparisons (NEW FORMAT)
From: AC Coordinator / NRCan GSDivision
Date: Wed, 30 Sep 1998 6:54:28 PDT

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IGS Electronic Report    Wed Sep 30  6:54:28 PDT 1998      Message Number 5366
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0971 G-SINEX Comparisons (NEW FORMAT)

Comparison of GNAAC Combined SINEX Solutions - Week 0971   
(AUG 16, 1998 - AUG 22, 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 
      30 mm. from ITRF96 after transformation  were  excluded from subsequent 
      analysis of this combined solution,  and the 7-parameter transformation 
      was reapplied.

      WARNING: This step has been modified starting week 971. 

   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:
   jpl0971g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0971g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0971g.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))

jpl0971g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0971g.snx: BARB    .110   .000   .000   .128   .000   .000   .000   .000   .000
ncl0971g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0971g.snx: TAHI    .110   .000   .000   .128   .000   .000  1.055   .000   .000
mit0971g.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 name code for 92201M009 should be THTI.

mit0971g.snx: HFLK    .110   .000   .000   .128   .000   .000  -.020   .000   .000
ncl0971g.snx: HRAO    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0971g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0971g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0971g.snx: TROM    .078   .000   .000   .096   .000   .000  2.475   .000   .000
mit0971g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000

FILE ncl0971g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0971g.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 mit0971g.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: 30 mm.
(REFERS TO COORDINATE DIFFERENCE FROM ITRF96 AFTER 7-PARAMETER TRANSFORMATION)

THE FOLLOWING STATIONS WERE DELETED FROM JPL
DUE TO DIFFERENCES IN EXCESS OF 30 mm. WITH ITRF96
AFTER 7-PARAMETER TRANSFORMATION TO ITRF96
 Lat DAV1  -56.7 mm.
 Lat KERG  -52.9 mm.
 Lat MALI  -45.1 mm.
 Lon OHIG  -37.9 mm.
 Hgt THU1  -33.6 mm.
 Lon SANT  -30.4 mm.
 Lon TIDB   35.5 mm.
 Lon HOB2   37.0 mm.
 Lon MAC1   52.4 mm.
 Hgt HOB2   95.9 mm.
 Lon HART  238.6 mm.*
 Lat HART  643.3 mm.*

*Proper offset may not have been used:
 30302M002 to 30302M007 dx/dy/dz: -.145m.,  -.374m.,  -.623m.

THE FOLLOWING STATIONS WERE DELETED FROM NCL
DUE TO DIFFERENCES IN EXCESS OF 30 mm. WITH ITRF96
AFTER 7-PARAMETER TRANSFORMATION TO ITRF96
 Hgt HOB2   78.4 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat NTUS JPL-MIT   Lat TID2 JPL-MIT   Lat MAW1 JPL-MIT
   Lat TOW2 JPL-MIT   Lat DARW JPL-MIT   Lat COCO JPL-MIT
   Lat ALIC JPL-MIT   Lat CEDU JPL-MIT   Lat KARR JPL-MIT
   Lat YAR1 JPL-MIT   Lat CAS1 JPL-MIT   Lat PERT JPL-MIT
   Lat CAS1 JPL-NCL   Lon CHAT JPL-MIT   Lon MCM4 JPL-MIT
   Lon AUCK JPL-MIT   Lon THTI JPL-MIT   Lon NOUM JPL-MIT
   Lon TID2 JPL-MIT   Lon DARW JPL-MIT   Lon HARK JPL-MIT
   Lon CHAT JPL-NCL   Lon AUCK JPL-NCL   Lon MCM4 JPL-NCL
   Lon TID2 JPL-NCL   Hgt MDVO JPL-MIT   Hgt MDVO MIT-NCL
   Hgt COCO JPL-MIT   Hgt CAGL JPL-MIT   Hgt MDVO JPL-MIT
   Hgt MDVO MIT-NCL   Hgt COCO MIT-NCL     

120 GLOBAL STATIONS:
   ALBH ALGO AMCT ANKR AOML AREQ ASC1 BAHR BAKO BOGO
   BOGT BOR1 BRMU BRUS CHUR CRO1 DAV1 DGAR DRAO DUBO
   EBRE EISL ELAT FAIR FLIN FORT GILB GLSV GODE GOL2
   GOLD GOPE GRAS GRAZ GUAM HERS HOFN HOLB IRKT JOZE
   JPLM KABR KATZ KELY KERG KIRU KIT3 KOKB KOSG KOUR
   KSTU KWJ1 LAMA LHAS LPGS MAC1 MAD2 MADR MAG0 MALI
   MAS1 MATE MDO1 MEDI METS MKEA NANO NICO NLIB NOTO
   NRC1 NSSP NYA1 OBER OHIG ONSA PENC PETR PIE1 POL2
   POTS PRDS QUIN RAMO REYK RIOG SANT SCH2 SELE SHAO
   SOL1 STJO SUWN TAEJ TELA THU1 TIDB TOUL TRO1 TSKB
   UCLU UPAD URUM USNA USNO USUD VILL WES2 WHIT WILL
   WSLR WSRT WTZR XIAN YAKA YAKZ YELL ZECK ZIMM ZWEN

40 FIDUCIAL STATIONS:
   ALGO BRMU DAV1 DRAO FAIR FORT GODE GOLD GRAZ GUAM
   IRKT KERG KIT3 KOKB KOSG KOUR KWJ1 LHAS MAC1 MADR
   MALI MATE MDO1 NLIB OHIG ONSA PERT PIE1 POTS SANT
   SHAO THU1 TIDB TSKB VILL WES2 WTZR YAR1 YELL ZWEN

AVERAGE COORDINATE RMS USING ITRF96:

            120    GLOBAL  STATIONS         40   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        2.1       2.4       1.3        3.6        4.7        5.1 
Lon        1.0       1.2       1.1        4.3        6.3        6.4 
Hgt        3.4       2.7       3.4       10.5       10.5       10.5 
3D         4.1       3.8       3.8       11.9       13.1       13.3

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

       130    GLOBAL  STATIONS         40   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.401     0.222     0.419      2.702      3.757      3.045

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       6.7     2.4    -6.9     2.4   -14.3     3.3         0.6      0.2
MIT       7.1     2.0    -1.5     2.0   -18.5     2.8        -0.2      0.1
NCL       7.2     2.6    -2.0     2.7   -10.6     3.5         0.3      0.1

REMARKS:

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0971g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0971g.snx :
   Stations: BRAZ MASP

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0971g.snx :
   Stations: BRAZ HART MADR MASP

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 NYA1 A       
    92201M006 TAHI A              
    92201M009 THTI A THTI A THTI A
                     TAHI A       
    50103M108 TID2 A TIDB A TID2 A
              TIDB A TID2 A TIDB A
    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  DARW 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:
-----------------------------
  RIOG A  BAKO A  URUM 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:
 cod09717.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09717.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09717.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09717.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09717.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09717.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09717.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
(ENTRIES APPEAR ONLY WHERE GNAACS DIFFER.)

IERS DOMES NO    COD  NRCan    ESA    GFZ    JPL    NGS    SIO
============= ====== ====== ====== ====== ====== ====== ======
    22306M002 IISC A        IISC B IISC A IISC A IISC B IISC A
    31303M002 MASP A MASP B MASP B MAS1 A MAS1 A MASP B MAS1 A
    42202M005 AREQ A AREQ B AREQ B AREQ A        AREQ B AREQ A
    12309M002 MDVO A        MDVO B        MDVO A        MDVO A
    12353M001 YAKZ A                      YAKA A        YAKZ A
                                          YAKZ A        YAKA 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 YAR2 A YAR1 A YAR1 A YAR1 A
    30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
    92201M009 TAHI A THTI A        THTI A THTI A        THTI A
    42005M001 GALA A               GALA A GALA A GALA B GALA A
    10302M006 TROM A               TRO1 A                     
    22601M001 NTUS A 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:
-----------------------------
  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]>]