Subject: [IGSREPORT-5840] Wk 0994 G-SINEX Comparisons
From: NRCan GSDivision
Date: Wed, 3 Mar 1999 13:39:44 PST

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IGS Electronic Report    Wed Mar  3 13:39:44 PST 1999      Message Number 5840
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Author: NRCan GSDivision
Subject: Wk 0994 G-SINEX Comparisons

Subject: Wk 0994 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0994   
(JAN 24, 1999 - JAN 30, 1999)

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    *** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED.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:
   jpl0994g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0994g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0994g.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))

jpl0994g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.676   .000   .000
mit0994g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0994g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
mit0994g.snx: BISH    .110   .000   .000   .128   .000   .000   .085   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0994g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0994g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0994g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0994g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .100   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0994g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0994g.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.

jpl0994g.snx: PETR    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0994g.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.

mit0994g.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).

jpl0994g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
jpl0994g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0994g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
jpl0994g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0994g.snx: SFER    .075   .002  -.001   .069  -.001   .002  1.626   .000   .000
jpl0994g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0994g.snx: TROM    .110   .000   .000   .128   .000   .000  2.369   .000   .000
jpl0994g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000

FILE ncl0994g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0994g.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 
 
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   67.7 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   72.2 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   66.8 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat YAKA JPL-NCL   Lat TIDB MIT-NCL   Lon KERG JPL-MIT
   Lon KERG JPL-NCL   Lon HARK JPL-NCL   Lon ASC1 MIT-NCL
   Hgt AREQ JPL-MIT   Hgt SANT JPL-MIT   Hgt LPGS JPL-MIT
   Hgt YAKA JPL-NCL   Hgt WUHN JPL-NCL     

128 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 ANKR AOML AUCK BAHR BOGO BOR1
   BRMU BRUS CAGL CAS1 CASC CEDU CHAT CHUR CICE COCO
   CRO1 DAV1 DGAR DRAO DUBO EISL ELAT FAIR FLIN FORT
   GALA GILB GLSV GODE GOL2 GOLD GOPE GOUG GRAS GRAZ
   GUAM HERS HOB2 HOFN HOLB HRAO IISC IRKT JOZE JPLM
   KABR KARR KATZ KELY KIRU KOKB KOSG KOUR KSTU KUNM
   KWJ1 LAMA MAC1 MAD2 MADR MAG0 MALI MAS1 MATE MAW1
   MDO1 MEDI METS NANO NICO NLIB NOTO NOUM NRC1 NTUS
   NYA1 NYAL OBER ONSA PENC PERT PIE1 POL2 POTS PRDS
   QUIN RAMO REYK RIOG SCH2 SELE SHAO SJDV SOL1 STJO
   SUWN TAEJ TELA THU1 TID2 TOUL TOW2 TRO1 TSKB UCLU
   UPAD USNA USNO USUD VESL VILL WES2 WHIT WILL WSLR
   WSRT WTZR XIAN YAKZ YAR1 YELL ZECK ZWEN  

42 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 PERT PIE1
   POTS SANT SHAO THU1 TIDB TSKB VILL WES2 WTZR YAR1
   YELL ZWEN        

AVERAGE COORDINATE RMS USING ITRF96:

            128    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.0       1.1       1.4        5.1        5.0        4.9 
Lon        1.2       3.8       3.2       10.2       10.0        7.9 
Hgt        2.7       3.1       4.3       13.5       14.3       14.0 
3D         3.1       5.0       5.6       17.7       18.2       16.8

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

       137    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.178     0.071     0.270     14.246     23.167      6.385

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      -0.5     1.9    -0.7     1.9     4.0     2.5        -1.0      0.1
MIT       1.8     1.3    -1.4     1.3    -2.2     1.7        -0.7      0.1
NCL       1.6     3.0    -5.0     2.9     4.5     4.1        -0.8      0.1

REMARKS:
 STATION NAME/POINT CODES CHANGED IN ncl0994g.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 jpl0994g.snx :
   Stations: BRAZ KIT3 LHAS OHIG

FOR THE FILE mit0994g.snx, UT WAS DELETED & THE A PRIORI COVARIANCE MATRIX 
WAS SCALED UPWARD (ALL ELEMENTS) BY A FACTOR OF 0.05% PRIOR TO DECONSTRAINING.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0994g.snx :
   Stations: BRAZ HART KIT3 LHAS OHIG

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0994g.snx :
   Stations: BRAZ HART KIT3 LHAS MAD2 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        AMC2 A       
    42202M005 AREQ A AREQ A AREQ A
              ARE1 A              
    42005M001 GALA A GALA A GALA A
              GAL1 A              
    40405S031 GOL2 A GOLD A GOL2 A
              GOLD A GOL2 A GOLD A
              GOL1 A              
    30302M007 HARK A HARK A HARK A
              HART A              
              HAR1 A              
    22306M002 IISC A IISC A IISC A
              IIS1 A              
    13407S012 MAD2 A MAD2 A       
              MADR A MADR A       
    31303M002 MAS1 A        MAS1 A
              MASP A              
    31303M001        MAS1 A       
    12309M002 MDVO A        MDVO A
    12309M001        MDVO A       
    12355M001 PETR A              
              PETP A              
    12355M002        PETP A PETP A
                     PETR 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              
 
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:
 cod09947.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09947.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09947.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09947.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09947.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09947.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09947.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
============= ====== ====== ====== ====== ====== ====== ======
    31303M002 MASP A MASP B MASP B MAS1 A        MASP B MAS1 A
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
    12355M002 PETR A               PETP A               PETP A
    12355M001                             PETP A              
    40472S004 AMCT A                                    AMC2 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
    30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
    10302M006 TROM A               TRO1 A               TRO1 A
    22306M002 IISC A        IISC B IISC A IISC A IISC B IISC A
    12353M001 YAKZ A                      YAKZ A YAKA A YAKZ A
    10317M003 NYAL A               NYA1 A NYA1 A        NYA1 A
    42005M001 GALA A               GALA A GALA A GALA B GALA 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  RIOG 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]>]