Subject: [IGSREPORT-5695] Wk 0986 G-SINEX Comparisons
From: NRCan GSDivision
Date: Fri, 22 Jan 1999 14:05:56 PST

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IGS Electronic Report    Fri Jan 22 14:05:56 PST 1999      Message Number 5695
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Author: NRCan GSDivision
Subject: Wk 0986 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0986   
(NOV 29, 1998 - DEC 5, 1998)

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.

FILES COMPARED:
   jpl0986g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0986g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0986g.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))

jpl0986g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0986g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0986g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0986g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .066   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0986g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0986g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
   - IERS DOMES NO 12355M001 should refer to PETR (0.0796 M. eccentricity)
     and 12355M002 to PETP (0.0435 M. eccentricity). Yet JPL lists PETP, PETR for 12355M001,
     while MIT lists PETP, PETR for 12355M002.

jpl0986g.snx: PETR    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0986g.snx: PETR    .110   .000   .000   .128   .000   .000   .044   .000   .000
   - IERS DOMES NO 12355M001 should refer to PETR (0.0796 M. eccentricity)
     and 12355M002 to PETP (0.0435 M. eccentricity). Yet JPL lists PETP, PETR for 12355M001,
     while MIT lists PETP, PETR for 12355M002.

jpl0986g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
mit0986g.snx: MDVO    .078   .000  -.003   .074  -.003  -.001   .146   .000   .000
   - Both wrong. Should be L1, L2 offset, eccentricity 0.0692, 0.0692, 0.146 M.
     respectively. Antenna EXT. L1/L2 KINEMATIC SSE listed in log file, but not igs.snx.

jpl0986g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0986g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0986g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0986g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000

FILE ncl0986g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0986g.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 mit0986g.snx
   MAS1 Multiple Sites
   AREQ Multiple Sites
   GALA Multiple Sites
   IISC Multiple Sites
 
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
   Stations: MAS1 AREQ 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 MCM4   62.1 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 MCM4   64.7 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 MCM4   62.0 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat HARK JPL-MIT   Lat SELE JPL-MIT   Lat SELE JPL-NCL
   Lat HRAO MIT-NCL   Lat HARK MIT-NCL   Lat GOUG MIT-NCL
   Lat KERG MIT-NCL   Lat DGAR MIT-NCL   Lat COCO MIT-NCL
   Lon COCO JPL-MIT   Lon DGAR JPL-NCL   Lon DGAR MIT-NCL
   Lon CAS1 MIT-NCL   Lon COCO MIT-NCL   Lon KERG MIT-NCL
   Lon DAV1 MIT-NCL   Hgt WUHN JPL-MIT   Hgt LPGS JPL-MIT
   Hgt COCO JPL-MIT   Hgt HARK JPL-MIT   Hgt SELE JPL-MIT
   Hgt HARK MIT-NCL   Hgt GOUG MIT-NCL   Hgt COCO MIT-NCL
   Hgt LPGS MIT-NCL   Hgt WUHN MIT-NCL     

127 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 ANKR AOML AREQ ASC1 AUCK BAHR
   BOGO BOGT BOR1 BRMU BRUS CAGL CASC CEDU CHAT CHUR
   CRO1 DRAO DUBO EISL ELAT FAIR FLIN FORT GILB GLSV
   GODE GOL2 GOLD GOPE GRAS GRAZ GUAM HERS HOB2 HOFN
   HOLB IRKT JOZE JPLM KABR KARR KATZ KELY KIRU KIT3
   KOKB KOSG KOUR KSTU KWJ1 LAMA MAC1 MAD2 MADR MAG0
   MALI MAS1 MATE MAW1 MDO1 MEDI METS NANO NLIB NOTO
   NOUM NRC1 NSSP NTUS NYA1 NYAL OBER ONSA PENC PERT
   PIE1 POL2 POTS PRDS QUIN RAMO REYK RIOG SANT SCH2
   SHAO SJDV SOL1 STJO SUWN TAEJ TELA THTI THU1 TID2
   TIDB TIXI TOUL TOW2 TRO1 TSKB UCLU UPAD URUM USNA
   USNO USUD VESL VILL WES2 WHIT WILL WSLR WSRT WTZR
   XIAN YAKA YAR1 YAR2 YELL ZECK ZWEN   

43 FIDUCIAL STATIONS:
   ALGO AREQ BAHR BRMU CAS1 DAV1 DRAO FAIR FORT GODE
   GRAZ GUAM HOB2 IRKT KERG KIT3 KOKB KOSG KOUR KWJ1
   MAC1 MAD2 MALI MAS1 MATE MDO1 NLIB NYAL ONSA PERT
   PIE1 POTS SANT SHAO THU1 TIDB TSKB VILL WES2 WTZR
   YAR1 YELL ZWEN       

AVERAGE COORDINATE RMS USING ITRF96:

            127    GLOBAL  STATIONS         43   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        0.9       0.8       0.9        6.0        5.6        5.7 
Lon        1.1       0.7       1.1        7.4        7.1        7.1 
Hgt        1.8       1.5       2.6       13.9       14.7       14.5 
3D         2.3       1.8       3.0       16.9       17.2       17.2

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
   -------   -------   ------- ---------- ---------- ----------
     0.083     0.034     0.174      7.123      9.761      6.540

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      -2.4     2.0    -7.0     2.0    -1.3     2.7        -0.4      0.1
MIT      -0.7     1.5    -6.9     1.6    -5.0     1.8        -0.4      0.1
NCL      -5.0     3.0   -14.0     2.8    -4.4     4.4        -0.5      0.1

REMARKS:
 FILE mit0986g.snx: STDs for daily EOPs listed in SOLUTION/APRIORI block, with-
		    out  corresponding  covariances in SOLUTION/MATRIX_APRIORI
		    block.  Hence, these records are deleted  prior to any com-
		    putation.  NOTE:  A priori UT STD 6.66667 ms. is less than
		    all  corresponding  UT STDs in the SOLUTION/ESTIMATE block,
		    which are in turn two orders of magnitude greater than pre-
		    vious weekly UT STDs; e.g., .0279325 ms. for week 979.

 MULTIPLY-USED 4-LETTER STATION NAME CODES IN FILE mit0986g.snx:
   AREQ  B 42202M005
   AREQ  A 42202M005
   GALA  A 42005M001
   GALA  B 42005M001
   IISC  A 22306M002
   IISC  B 22306M002
   NYAL  B 10317M003
   NYAL  A 10317M001

 STATION NAME/POINT CODES CHANGED IN mit0986g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
MASP  B MAS1  A 31303M002
YAKZ  A YAKA  A 12353M001
TROM  B TRO1  A 10302M006
NYAL  B NYA1  A 10317M003

      4 Changes in all.

 STATION NAME/POINT CODES CHANGED IN jpl0986g.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.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0986g.snx :
   Stations: BRAZ LHAS OHIG TROM

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0986g.snx :
   Stations: BRAZ LHAS OHIG

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0986g.snx :
   Stations: BRAZ HART LHAS MAD2 OHIG 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
============= ====== ====== ======
    42202M005 AREQ A AREQ B AREQ A
              ARE1 A AREQ 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 HART B HARK A
              HART A HARK A       
              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 MASP B MAS1 A
              MASP A              
    31303M001        MAS1 A       
    12309M002 MDVO A              
    12309M001        MDVO A       
    10317M003 NYA1 A NYAL B NYA1 A
    12355M001 PETR A              
              PETP A              
    12355M002        PETP A PETP A
                     PETR 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 YAR2 A       
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  ALIC 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  AMC2 A  URUM 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:
 cod09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09867.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09867.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
============= ====== ====== ====== ====== ====== ====== ======
    30302M007 HART A HART B HART B HARK A        HART B HARK A
    31303M002 MASP A MASP B MASP B MAS1 A        MASP B MAS1 A
    12355M002 PETR A               PETP A               PETP A
    12355M001                             PETP 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
    42202M005        AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
    13407S012               MADR A        MAD2 A MADR A MAD2 A
    22601M001               NTUS A NTUS A NTUS A        NTUS A
    22601M002                                    NTUS A       
    22306M002               IISC B IISC A IISC A IISC B IISC A
    42005M001                      GALA A        GALA B GALA A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  URUM A  RIOG A
 
MISSING IERS DOMES NOS AT SIO:
-----------------------------
  INEG A  AMC2 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]>]