Subject: [IGSREPORT-5687] Wk 0980 G-SINEX Comparisons
From: NRCan GSDivision
Date: Fri, 22 Jan 1999 13:56:38 PST

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IGS Electronic Report    Fri Jan 22 13:56:38 PST 1999      Message Number 5687
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Author: NRCan GSDivision
Subject: Wk 0980 G-SINEX Comparisons

Subject: Wk 0980 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0980   
(OCT 18, 1998 - OCT 24, 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:
   jpl0980g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0980g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0980g.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))

jpl0980g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0980g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .066   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0980g.snx: HOFN    .075   .002  -.001   .069  -.001   .002   .055   .000   .000
mit0980g.snx: HOFN    .075   .002  -.001   .069  -.001   .002   .055   .000   .000
   - Station log file indicates L1/L2 offset 0.0625 M., eccentricity 0.055 M.
     Conflicts with igs.snx, igs_01.pcv L1/L2 offset 0.075, 0.069 M. for antenna
     TRIMBLE TR GEOD L1/L2 GP.

jpl0980g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
mit0980g.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.
     See log file, as igs.snx lists no L1/L2 offsets for antenna EXT. L1/L2 KINEMATIC.

jpl0980g.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). JPL lists PETP wrongly for
     12355M001.

mit0980g.snx: TAHI    .110   .000   .000   .128   .000   .000  1.047   .000   .000
   - IERS DOMES NO 92201M009 should refer to THTI (1.047 M. eccentricity)
     and 92201M006 to TAHI (1.055 M. eccentricity). Yet MIT lists both THTI, TAHI
     for 92201M009.

jpl0980g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
mit0980g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Both wrong. Should be L1/L2 offset, eccentricity 0.110, 0.128, 0.000 M. respectively.

jpl0980g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0980g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0980g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0980g.snx: TROM    .110   .000   .000   .128   .000   .000  2.369   .000   .000
mit0980g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000

FILE ncl0980g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0980g.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 mit0980g.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   68.9 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 HOB2  -87.2 mm.
 Hgt MCM4   73.8 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  -85.0 mm.
 Hgt MCM4   70.2 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat THTI JPL-NCL   Lat YAKA JPL-NCL   Lat ASC1 MIT-NCL
   Lat YAKA MIT-NCL   Lon DGAR JPL-MIT   Lon HRAO JPL-MIT
   Lon COCO JPL-MIT   Lon HARK JPL-MIT   Lon HRAO JPL-NCL
   Lon COCO MIT-NCL   Hgt THU1 JPL-MIT   Hgt MALI JPL-MIT
   Hgt YAKA JPL-NCL   Hgt THU1 JPL-NCL   Hgt YAKA MIT-NCL

132 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 AOML AREQ AUCK BAHR BAKO BISH
   BOGO BOGT BOR1 BRMU BRUS CAGL CAS1 CASA CEDU CHAT
   CHUR CRO1 DARW DAV1 DRAO DUBO EISL ELAT FAIR FLIN
   FORT GILB GLSV GODE GOL2 GOLD GOPE GOUG GRAS GRAZ
   GUAM HERS HOLB IAVH IRKT JOZE JPLM KABR KARR KATZ
   KELY KERG KIRU KIT3 KOKB KOSG KOUR KSTU KWJ1 LAMA
   LHAS LPGS MAC1 MAD2 MADR MAG0 MAS1 MATE MAW1 MDO1
   MEDI METS MKEA NANO NICO NLIB NOTO NOUM NRC1 NSSP
   NTUS NYA1 NYAL OBER OHIG ONSA PENC PERT PIE1 POL2
   POTS PRDS QUIN RAMO REYK RIOG SANT SCH2 SELE SHAO
   SJDV SOL1 STJO SUWN TAEJ TELA TID2 TIDB TOUL TOW2
   TSKB UCLU UPAD URUM USNA USNO USUD VESL VILL WES2
   WHIT WILL WSLR WSRT WTZR XIAN YAKZ YAR1 YAR2 YELL
   ZECK ZWEN        

44 FIDUCIAL STATIONS:
   ALGO AREQ BAHR BRMU CAS1 DAV1 DRAO FAIR FORT GODE
   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 TIDB TSKB VILL WES2
   WTZR YAR1 YELL ZWEN      

AVERAGE COORDINATE RMS USING ITRF96:

            132    GLOBAL  STATIONS         44   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.1       1.4       0.9        5.4        5.3        5.4 
Lon        1.3       1.4       1.1        6.2        6.0        6.0 
Hgt        2.0       2.3       2.0       10.7       12.5       12.4 
3D         2.6       3.0       2.5       13.4       14.9       14.8

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

       132    GLOBAL  STATIONS         44   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.107     0.157     0.086      5.291      7.069      4.544

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     -11.1     2.5   -12.2     2.6    -3.8     3.5        -0.4      0.1
MIT      -6.1     1.7    -8.6     1.8    -5.4     2.2        -0.4      0.1
NCL     -10.5     3.0    -8.1     3.1   -11.2     4.4        -0.4      0.1

REMARKS:
 FILE mit0980g.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.

 STATION NAME/POINT CODES CHANGED IN ncl0980g.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.

 MULTIPLY-USED 4-LETTER STATION NAME CODES IN mit0980g.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 mit0980g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
MASP  B MAS1  A 31303M002
NYAL  B NYA1  A 10317M003

      2 Changes in all.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0980g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0980g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0980g.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 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       
    12355M001 PETP A              
    12355M002        PETP 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 YAKZ A YAKZ A
              YAKZ A YAKA A       
    50107M004 YAR1 A YAR1 A YAR1 A
              YAR2 A YAR2 A       
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  ALIC A  BAKO A  BISH A  DARW 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  BISH 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:
 cod09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09807.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09807.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
============= ====== ====== ====== ====== ====== ====== ======
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
    22306M002 IISC A        IISC B IISC A IISC A IISC B IISC 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
    31303M002 MASP A MASP B MASP B MAS1 A MAS1 A MASP B MAS1 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
    12353M001 YAKZ A                      YAKA A        YAKZ A
                                          YAKZ A              
    92201M009 TAHI A THTI A               THTI A        THTI A
    42005M001 GALA A               GALA A        GALA B GALA A
    13407S012               MADR A        MAD2 A MADR A MAD2 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 SIO:
-----------------------------
  INEG A  AMC2 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]>]