Subject: [IGSREPORT-5690] Wk 0983 G-SINEX Comparisons
From: NRCan GSDivision
Date: Fri, 22 Jan 1999 14:02:16 PST

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IGS Electronic Report    Fri Jan 22 14:02:16 PST 1999      Message Number 5690
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Author: NRCan GSDivision
Subject: Wk 0983 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0983   
(NOV 8, 1998 - NOV 14, 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:
   jpl0983g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0983g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0983g.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))

jpl0983g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0983g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0983g.snx: CEDU    .110   .000   .000   .128   .000   .000   .006   .000   .000
mit0983g.snx: CEDU    .000   .000   .000   .000   .000   .000   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0983g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0983g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .066   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

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.

jpl0983g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0983g.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 for 12355M001,
     while MIT, NCL list it for 12355M002.

mit0983g.snx: NYAL    .110   .000   .000   .128   .000   .000   .000   .000   .000
ncl0983g.snx: NYAL    .078   .000   .000   .096   .000   .000  5.216   .000   .000
   - IERS DOMES NO 10317M001 should refer to NYAL (5.2160 M. eccentricity) and 10317M003
     to NYA1 (0.0000 M. eccentricity). Yet JPL, NCL lists NYA1 A for 10317M003, while
     MIT lists NYAL B for the same IERS DOMES NO.

jpl0983g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0983g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0983g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0983g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000
jpl0983g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000

FILE ncl0983g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0983g.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 mit0983g.snx
   MAS1 Multiple Sites
   AREQ Multiple Sites
   GALA Multiple Sites
   IISC Multiple Sites
   MDVO Multiple Sites
 
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
   Stations: MAS1 AREQ GALA IISC MDVO 
 
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   61.6 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   65.3 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   62.2 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat VESL JPL-MIT   Lat GOUG JPL-MIT   Lat HRAO MIT-NCL
   Lat GOUG MIT-NCL   Lat HARK MIT-NCL   Lat ASC1 MIT-NCL
   Lat KERG MIT-NCL   Lat FORT MIT-NCL   Lat KOUR MIT-NCL
   Lon BAKO JPL-MIT   Lon COCO JPL-MIT   Lon AREQ JPL-NCL
   Lon ASC1 MIT-NCL   Lon SANT MIT-NCL   Lon OHIG MIT-NCL
   Lon AUCK MIT-NCL   Lon NOUM MIT-NCL   Hgt HARK JPL-MIT
   Hgt MALI JPL-MIT   Hgt NTUS JPL-MIT   Hgt COCO JPL-MIT
   Hgt NTUS JPL-NCL   Hgt MALI MIT-NCL   Hgt HRAO MIT-NCL

118 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 AOML BAHR BISH BOGO BOGT BOR1
   BRMU BRUS CAGL CAS1 CASC 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
   IRKT JOZE JPLM KABR KARR KATZ KELY KIRU KOKB KOSG
   KSTU KWJ1 LAMA LHAS LPGS MAC1 MAD2 MADR MAG0 MAS1
   MATE MAW1 MDO1 MEDI METS MKEA NANO NLIB NOTO NRC1
   NSSP NYA1 OBER ONSA PENC PERT PIE1 POL2 POTS PRDS
   QUIN RAMO REYK SCH2 SELE SHAO SJDV SOL1 STJO SUWN
   TAEJ TELA THU1 TID2 TIDB TIXI TOUL TOW2 TRO1 TSKB
   UCLU UPAD USNA USNO USUD VILL WES2 WHIT WILL WSLR
   WSRT WTZR XIAN YAKA YAR1 YELL ZECK ZWEN  

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

AVERAGE COORDINATE RMS USING ITRF96:

            118    GLOBAL  STATIONS         43   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.0       1.0       1.0        4.9        4.3        4.7 
Lon        1.3       1.2       1.5        5.8        5.9        5.8 
Hgt        2.5       2.7       2.9       11.5       11.4       11.6 
3D         3.0       3.1       3.4       13.8       13.5       13.7

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

       129    GLOBAL  STATIONS         43   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.170     0.119     0.156      6.380      8.625      5.246

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      -7.5     2.1    -8.2     2.2     7.7     3.2        -0.7      0.1
MIT      -2.3     1.6   -10.5     1.7     4.3     2.2        -0.5      0.1
NCL      -8.8     3.1    -9.7     3.1    10.2     4.5        -0.7      0.1

REMARKS:
 FILE mit0983g.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 ncl0983g.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 mit0983g.snx:
   AREQ  B 42202M005
   AREQ  A 42202M005
   GALA  A 42005M001
   GALA  B 42005M001
   IISC  A 22306M002
   IISC  B 22306M002
   MDVO  A 12309M001
   MDVO  B 12309M002
   NYAL  B 10317M003
   NYAL  A 10317M001

 STATION NAME/POINT CODES CHANGED IN mit0983g.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
MDVO  B MDVO  A 12309M002
TROM  B TRO1  A 10302M006
NYAL  B NYA1  A 10317M003

      5 Changes in all.

 STATION NAME/POINT CODES CHANGED IN jpl0983g.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 jpl0983g.snx :
   Stations: BRAZ KIT3 TROM

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0983g.snx :
   Stations: BRAZ KIT3

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0983g.snx :
   Stations: BRAZ HART KIT3 MAD2 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 MDVO B MDVO A
              MDV1 A              
    12309M001        MDVO A       
    10317M003 NYA1 A NYAL B NYA1 A
    12355M001 PETP A              
    12355M002        PETP A PETP A
    50103M108 TID2 A TIDB A TID2 A
              TIDB A TID2 A TIDB A
    10302M006 TRO1 A TROM B TRO1 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  TELA A  TOW2 A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  INEG A  AMC2 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:
 cod09837.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09837.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09837.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09837.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09837.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09837.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09837.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
============= ====== ====== ====== ====== ====== ====== ======
    22306M002 IISC A        IISC B IISC A IISC A IISC B IISC A
    40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD B GOL2 A
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
    42005M001 GALA A               GALA A GALA A GALA B GALA A
    12309M002 MDVO A        MDVO B                      MDVO A
    31303M002 MASP A MASP B MASP B MAS1 A        MASP B MAS1 A
    10317M003 NYAL A               NYA1 A NYA1 A        NYA1 A
    50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TID2 A
    30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
    22601M001 NTUS A        NTUS A NTUS A NTUS A        NTUS A
    22601M002                                    NTUS A       
    10302M006 TROM A               TRO1 A               TRO1 A
    13407S012               MADR A        MAD2 A MADR A MAD2 A
    12355M002                      PETP A               PETP A
    12355M001                             PETP A              
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH 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]>]