Subject: [IGSREPORT-5724] Wk 0988 G-SINEX Comparisons
From: NRCan GSDivision
Date: Mon, 1 Feb 1999 14:05:56 PST

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IGS Electronic Report    Mon Feb  1 14:05:56 PST 1999      Message Number 5724
******************************************************************************

Author: NRCan GSDivision
Subject: Wk 0988 G-SINEX Comparisons

Subject: Wk 0988 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0988   
(DEC 13, 1998 - DEC 19, 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   *** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED.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:
   jpl0988g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0988g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0988g.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))

jpl0988g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.676   .000   .000
mit0988g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0988g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
mit0988g.snx: BISH    .110   .000   .000   .128   .000   .000   .085   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0988g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0988g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0988g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0988g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .066   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0988g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
mit0988g.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.

jpl0988g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0988g.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 them for 12355M002.

jpl0988g.snx: PETR    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0988g.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.

mit0988g.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.

jpl0988g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0988g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0988g.snx: SFER    .075   .002  -.001   .069  -.001   .002  1.626   .000   .000
jpl0988g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0988g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000
jpl0988g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000

FILE ncl0988g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0988g.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 mit0988g.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   67.9 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 MCM4   70.9 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   67.2 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat MAW1 JPL-MIT   Lat HRAO JPL-MIT   Lat GOUG JPL-MIT
   Lat KERG JPL-MIT   Lat VESL JPL-MIT   Lat HARK MIT-NCL
   Lat GOUG MIT-NCL   Lat HRAO MIT-NCL   Lat KERG MIT-NCL
   Lat ASC1 MIT-NCL   Lat MALI MIT-NCL   Lon CAS1 JPL-MIT
   Lon KOUR JPL-MIT   Lon KOUR JPL-NCL   Lon WHIT MIT-NCL
   Lon SANT MIT-NCL   Lon CAS1 MIT-NCL   Hgt KOUR JPL-NCL
   Hgt FORT JPL-NCL   Hgt IRKT JPL-NCL   Hgt GOUG MIT-NCL
   Hgt MALI MIT-NCL   Hgt SANT MIT-NCL   Hgt ALBH MIT-NCL
   Hgt COCO MIT-NCL          

122 GLOBAL STATIONS:
   ALGO ALIC AMC2 AMCT ANKR AOML AREQ AUCK BAHR BOGO
   BOGT BOR1 BRMU BRUS CAGL CASA CASC CEDU CHAT CHUR
   CRO1 DAV1 DGAR DRAO DUBO EISL ELAT FAIR FLIN GILB
   GLSV GODE GOL2 GOLD GOPE GRAS GRAZ GUAM HERS HOB2
   HOFN HOLB IAVH JOZE JPLM KABR KARR KATZ KELY KIRU
   KOKB KOSG KSTU KUNM KWJ1 LAMA LPGS MAC1 MAD2 MADR
   MAG0 MAS1 MATE MDO1 MEDI METS NANO NICO NLIB NOTO
   NOUM NRC1 NTUS NYA1 OBER ONSA PENC PERT PIE1 POL2
   POTS PRDS QUIN REYK RIOG SCH2 SELE SHAO SJDV SOL1
   STJO SUWN TAEJ TELA THTI THU1 TID2 TIDB TIXI TOUL
   TOW2 TRO1 TSKB UCLU UPAD USNA USNO USUD VILL WES2
   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 ONSA PERT PIE1 POTS
   SANT SHAO THU1 TIDB TSKB VILL WES2 WTZR YAR1 YELL
   ZWEN         

AVERAGE COORDINATE RMS USING ITRF96:

            122    GLOBAL  STATIONS         41   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        0.9       0.9       1.1        6.0        5.5        5.6 
Lon        1.5       1.2       1.6        6.9        7.0        6.8 
Hgt        2.2       1.9       2.9       13.7       13.9       14.6 
3D         2.8       2.4       3.4       16.4       16.5       17.0

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

       132    GLOBAL  STATIONS         41   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.104     0.095     0.248      7.348     10.644      6.531

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      -7.3     2.1    -1.3     2.1     3.1     2.4        -0.4      0.1
MIT      -5.8     1.4    -1.4     1.4     0.1     1.6        -0.3      0.1
NCL     -13.1     3.0    -1.5     2.8    11.9     4.0        -0.5      0.1

REMARKS:
 FILE mit0988g.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 ncl0988g.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 mit0988g.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 mit0988g.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 jpl0988g.snx :
   Stations: BRAZ KIT3 LHAS OHIG TROM

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0988g.snx :
   Stations: BRAZ KIT3 LHAS OHIG

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0988g.snx :
   Stations: BRAZ HART KIT3 LHAS MAD2 NYAL 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
============= ====== ====== ======
    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              
    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        MDVO A
    12309M001        MDVO A       
    10317M003 NYA1 A NYAL B NYA1 A
    12355M001 PETR A              
              PETP A              
    12355M002        PETP A PETP A
                     PETR 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
    10302M006 TRO1 A TROM B       
    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  BSHM A  ELAT A  GILB A  INEG 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  INEG 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:
 cod09887.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09887.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09887.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09887.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09887.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09887.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 (* File esa09887.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
    22306M002 IISC A        IISC A IISC A IISC B IISC A
    31303M002 MASP A MASP B MAS1 A        MASP B MAS1 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
    30302M007 HART A HART B HARK A        HART B HARK A
    22601M001 NTUS A        NTUS A NTUS A        NTUS A
    22601M002                             NTUS A       
    42202M005 AREQ A AREQ B AREQ A AREQ A AREQ B AREQ A
    92201M009 TAHI A        THTI A THTI A        THTI A
    12353M001 YAKZ A               YAKA A YAKA A YAKZ A
                                   YAKZ A              
    12355M002 PETR A        PETP A               PETP A
    12355M001                      PETP A              
    42005M001 GALA A        GALA A GALA A GALA B GALA A
    40472S004 AMCT A                             AMC2 A
    13407S012                      MAD2 A MADR A MAD2 A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH 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]>]