Subject: [IGSREPORT-5725] Wk 0989 G-SINEX Comparisons
From: NRCan GSDivision
Date: Mon, 1 Feb 1999 14:07:57 PST

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IGS Electronic Report    Mon Feb  1 14:07:57 PST 1999      Message Number 5725
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Author: NRCan GSDivision
Subject: Wk 0989 G-SINEX Comparisons

Subject: Wk 0989 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0989   
(DEC 20, 1998 - DEC 26, 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.

   *** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED.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

FILES COMPARED:
   jpl0989g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0989g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0989g.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))

jpl0989g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.676   .000   .000
mit0989g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0989g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
mit0989g.snx: BISH    .110   .000   .000   .128   .000   .000   .085   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0989g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0989g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0989g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
mit0989g.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.

jpl0989g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0989g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
ncl0989g.snx: PETP    .110   .000   .000   .128   .000   .000   .043   .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 them for 12355M002.

jpl0989g.snx: PETR    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0989g.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 them for 12355M002.

mit0989g.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.

mit0989g.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).

jpl0989g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0989g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0989g.snx: SFER    .075   .002  -.001   .069  -.001   .002  1.626   .000   .000
jpl0989g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0989g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000

FILE ncl0989g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0989g.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 mit0989g.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   76.1 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   79.4 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   74.0 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat HRAO JPL-MIT   Lat KERG JPL-MIT   Lat MAW1 JPL-MIT
   Lat DAV1 JPL-MIT   Lat DAV1 MIT-NCL   Lat KERG MIT-NCL
   Lat CAS1 MIT-NCL   Lat HRAO MIT-NCL   Lon GOUG MIT-NCL
   Lon HRAO MIT-NCL   Hgt WUHN JPL-MIT   Hgt COCO JPL-MIT
   Hgt WUHN JPL-NCL   Hgt COCO MIT-NCL   Hgt GOUG MIT-NCL
   Hgt MALI MIT-NCL   Hgt KERG MIT-NCL     

130 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 AMCT ANKR AOML AREQ ASC1 AUCK
   BAHR BOGO BOGT BOR1 BRMU BRUS CAGL CASA CASC CEDU
   CHAT CHUR CIT1 CRO1 DGAR DRAO DUBO EISL ELAT FAIR
   FLIN FORT GILB GLSV GODE GOL2 GOLD GOPE GRAS GRAZ
   GUAM HERS HOB2 HOFN HOLB IAVH IRKT JOZE JPLM KABR
   KARR KATZ KELY KIRU KOKB KOSG KOUR KSTU KUNM KWJ1
   LAMA LPGS MAC1 MAD2 MADR MAG0 MAS1 MATE MDO1 MEDI
   METS NANO NICO NLIB NOTO NOUM NRC1 NTUS NYA1 NYAL
   OBER ONSA PENC PIE1 POL2 POTS PRDS QUIN RAMO REYK
   RIOG SANT SCH2 SELE SHAO SJDV SOL1 STJO SUWN TAEJ
   TELA THTI THU1 TID2 TIDB TOUL TOW2 TRO1 TSKB UCLU
   UPAD USNA USNO USUD VESL VILL WES2 WHIT WILL WSLR
   WSRT WTZR XIAN YAKA YAKZ YAR1 YAR2 YELL ZECK ZWEN

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

AVERAGE COORDINATE RMS USING ITRF96:

            130    GLOBAL  STATIONS         41   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.4       1.3       1.4        6.3        5.4        6.3 
Lon        1.9       3.4       3.2        9.5        8.5        6.7 
Hgt        2.4       2.6       3.1       13.5       15.8       15.4 
3D         3.4       4.5       4.7       17.7       18.8       17.9

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

       134    GLOBAL  STATIONS         41   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.140     0.129     0.308     12.313     15.977      5.769

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      -6.0     2.4    -4.1     2.4     3.6     2.8        -0.7      0.1
MIT      -4.3     1.6    -4.1     1.7     1.3     2.0        -0.5      0.1
NCL      -7.7     3.1    -8.2     3.0    11.1     4.4        -0.6      0.1

REMARKS:
 FILE mit0989g.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 mit0989g.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 mit0989g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

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

      3 Changes in all.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0989g.snx :
   Stations: BRAZ HART KIT3 LHAS OHIG PERT TROM

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0989g.snx :
   Stations: BRAZ HART KIT3 LHAS OHIG PERT

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0989g.snx :
   Stations: BRAZ HART KIT3 LHAS MAD2 OHIG PERT 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        AMCT A       
                     AMC2 A       
    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              
    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        MDVO A
    12309M001        MDVO A       
    10317M003 NYA1 A NYAL B NYA1 A
    12355M001 PETR A              
              PETP A              
    12355M002        PETP A PETP A
                     PETR A       
    92201M009 THTI A THTI A THTI A
                     TAHI A       
    50103M108 TID2 A TIDB A TID2 A
              TIDB A TID2 A TIDB A
    10302M006 TRO1 A TROM B TRO1 A
    12353M001 YAKA 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  BSHM A  ELAT A  GILB A  KABR A  KARR A  KATZ A  MAW1 A
  RAMO A  RIOG A  TELA A  TOW2 A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  RIOG 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:
 cod09897.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09897.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09897.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09897.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09897.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09897.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 (* FILE esa09897.ssc not yet submitted at time of analysis. *)
(ENTRIES APPEAR ONLY WHERE ACS DIFFER.)

IERS DOMES NO    COD  NRCan    GFZ    JPL    NGS    SIO
============= ====== ====== ====== ====== ====== ======
    50107M004 YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
    92201M009 TAHI A               THTI A        THTI A
    31303M002 MASP A MASP B MAS1 A        MASP B MAS1 A
    12353M001 YAKZ A                      YAKA A YAKZ A
    12355M002 PETR A        PETP A               PETP A
    12355M001                      PETP A              
    40472S004 AMCT A                             AMC2 A
    40405S031 GOLD A GOLD A GOL2 A GOL2 A GOLD B GOL2 A
    50103M108 TIDB A TIDB A TID2 A TID2 A TIDB A TID2 A
    22306M002 IISC A        IISC A IISC A IISC B IISC A
    42202M005 AREQ A AREQ B AREQ A AREQ A AREQ B AREQ A
    42005M001 GALA A        GALA A GALA A GALA B GALA A
    10302M006 TROM A        TRO1 A               TRO1 A
    22601M001               NTUS A NTUS A        NTUS A
    22601M002                             NTUS A       
    13407S012                      MAD2 A MADR A MAD2 A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH A  RIOG 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]>]