Subject: [IGSREPORT-5444] Wk 0977 G-SINEX Comparisons
From: AC Coordinator / NRCan GSDivision
Date: Mon, 26 Oct 1998 5:47:38 PST

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IGS Electronic Report    Mon Oct 26  5:47:38 PST 1998      Message Number 5444
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0977 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0977   
(SEP 27, 1998 - OCT 3, 1998)

Contacts: J. Kouba ([email-masked])
          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:
   jpl0977g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0977g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0977g.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))

jpl0977g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0977g.snx: BARB    .110   .000   .000   .128   .000   .000   .000   .000   .000
ncl0977g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0977g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0977g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .066   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0977g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
ncl0977g.snx: HOFN    .000   .000   .000   .000   .000   .000   .055   .000   .000
ncl0977g.snx: HRAO    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0977g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0977g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0977g.snx: TROM    .078   .000   .000   .096   .000   .000  2.475   .000   .000

FILE ncl0977g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0977g.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 mit0977g.snx
   GALA Multiple Sites
   IISC Multiple Sites
 
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
   Stations: 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 MIT
DUE TO DIFFERENCES IN EXCESS OF 55 mm. WITH ITRF96
AFTER 7-PARAMETER TRANSFORMATION TO ITRF96
 Hgt HOB2  -98.4 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 HOB2 -146.1 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat TRO1 JPL-MIT   Lat TOW2 JPL-MIT   Lat ALIC JPL-MIT
   Lat MAC1 JPL-MIT   Lat MALI JPL-MIT   Lat CEDU JPL-MIT
   Lat HARK JPL-MIT   Lat TIDB JPL-MIT   Lat COCO JPL-MIT
   Lat TID2 JPL-MIT   Lat TID2 JPL-NCL   Lon TRO1 JPL-MIT
   Lon BAKO JPL-MIT   Lon MALI JPL-NCL   Lon AREQ JPL-NCL
   Lon LPGS JPL-NCL   Lon WHIT MIT-NCL   Lon NTUS MIT-NCL
   Lon YAR1 MIT-NCL   Lon MAS1 MIT-NCL   Hgt THU1 JPL-MIT
   Hgt COCO JPL-MIT   Hgt MDVO JPL-NCL   Hgt YAKA JPL-NCL
   Hgt COCO JPL-NCL   Hgt MDVO MIT-NCL   Hgt WUHN MIT-NCL

122 GLOBAL STATIONS:
   ALBH ALGO AMCT ANKR AOML ASC1 AUCK BAHR BISH BOGO
   BOGT BOR1 BRMU BRUS CAGL CAS1 CHAT CHUR CRO1 DARW
   DAV1 DGAR DRAO DUBO EISL ELAT FAIR FLIN FORT GILB
   GLSV GODE GOL2 GOLD GOPE GOUG GRAS GRAZ GUAM HERS
   HOLB IAVH IRKT JAB1 JOZE JPLM KABR KARR KATZ KELY
   KERG KIRU KIT3 KOKB KOSG KOUR KSTU KWJ1 LAMA LHAS
   MAD2 MADR MATE MAW1 MCM4 MDO1 MEDI METS MKEA NANO
   NICO NLIB NOTO NOUM NRC1 NSSP NYA1 NYAL OBER OHIG
   ONSA PENC PERT PETR PIE1 POL2 POTS PRDS QUIN RAMO
   RIOG SANT SCH2 SELE SHAO SJDV SOL1 STJO SUWN TAEJ
   TELA TOUL TSKB UCLU UPAD URUM USNA USNO USUD VESL
   VILL WES2 WILL WSLR WSRT WTZR XIAN YAKZ YELL ZECK
   ZIMM ZWEN        

43 FIDUCIAL STATIONS:
   ALGO AREQ BRMU DAV1 DRAO FAIR FORT GODE GOL2 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 TID2 TSKB VILL WES2 WTZR
   YAR1 YELL ZWEN       

AVERAGE COORDINATE RMS USING ITRF96:

            122    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       0.9       0.7        5.2        5.0        5.0 
Lon        0.7       0.9       0.9        6.1        6.1        6.0 
Hgt        2.1       2.8       2.7       10.0       11.7       11.5 
3D         2.4       3.1       2.9       12.8       14.1       13.9

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

       137    GLOBAL  STATIONS         43   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.115     0.127     0.163      2.866      3.805      2.508

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      -2.7     2.8    -1.7     2.9    -8.0     3.8        -0.1      0.2
MIT      -2.2     1.8    -0.8     1.9    -9.5     2.5        -0.4      0.1
NCL      -1.5     3.2    -0.8     3.3    -6.6     4.5        -0.1      0.2

REMARKS:
 STATION NAME/POINT CODES CHANGED IN ncl0977g.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.

 STATION NAME/POINT CODES CHANGED IN mit0977g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

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

      2 Changes in all.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0977g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0977g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0977g.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 A AREQ A
              ARE1 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 HARK A HARK A
              HART A HART B       
              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        MAS1 A
              MASP A              
    31303M001        MAS1 A       
    12309M002 MDVO A        MDVO A
              MDV1 A              
    12309M001        MDVO A       
    10317M003 NYA1 A NYAL B       
    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              
 
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  BAKO A  URUM A  BISH A  KATZ A  GILB A  KABR A  ELAT A  TELA A

SITE/ID BLOCK IERS DOMES NOS. VS STATION CODE/PT FIELDS IN ABBREVIATED .ssc FILES:
 cod09777.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09777.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09777.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09777.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09777.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09777.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09777.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 HARK A HART B HARK A
    31303M002 MASP A MASP B MASP B MAS1 A MAS1 A MASP B MAS1 A
    12309M002 MDVO A        MDVO B        MDVO A        MDVO A
    12353M001 YAKZ A                      YAKA A        YAKZ A
                                          YAKZ 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 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
    42005M001 GALA A               GALA A GALA A GALA B GALA A
    10302M006 TROM A               TRO1 A                     
    13407S012               MADR A        MAD2 A MADR A MAD2 A
    22601M001               NTUS A 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 SIO:
-----------------------------
  INEG A  BAKO 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]>]