Subject: [IGSREPORT-5727] Wk 0991 G-SINEX Comparisons
From: NRCan GSDivision
Date: Mon, 1 Feb 1999 14:10:26 PST

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IGS Electronic Report    Mon Feb  1 14:10:26 PST 1999      Message Number 5727
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Author: NRCan GSDivision
Subject: Wk 0991 G-SINEX Comparisons

Subject: Wk 0991 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0991   
(JAN 3, 1999 - JAN 9, 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   *** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED.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:
   jpl0991g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0991g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0991g.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))

jpl0991g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.676   .000   .000
mit0991g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0991g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
mit0991g.snx: BISH    .110   .000   .000   .128   .000   .000   .085   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0991g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0991g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0991g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0991g.snx: PETP    .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.

jpl0991g.snx: PETR    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0991g.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.

mit0991g.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.

jpl0991g.snx: TROM    .110   .000   .000   .128   .000   .000  2.369   .000   .000
ncl0991g.snx: TROM    .110   .000   .000   .128   .000   .000  2.369   .000   .000
   - Both wrong Should be L1/L2 offset, eccentricity 0.078, 0.096, 2.475 M. respectively.

jpl0991g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0991g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0991g.snx: SFER    .075   .002  -.001   .069  -.001   .002  1.626   .000   .000
jpl0991g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0991g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000
jpl0991g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000

FILE ncl0991g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0991g.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 mit0991g.snx
   MAS1 Multiple Sites
   AREQ Multiple Sites
   GALA Multiple Sites
   MDVO Multiple Sites
 
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
   Stations: MAS1 AREQ GALA 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   70.3 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   74.2 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   67.9 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat DAV1 JPL-MIT   Lat CAS1 MIT-NCL   Lat DAV1 MIT-NCL
   Lat KERG MIT-NCL   Lat YAR1 MIT-NCL   Lat HOB2 MIT-NCL
   Lat PERT MIT-NCL   Lat HRAO MIT-NCL   Lon ASC1 MIT-NCL
   Hgt HRAO JPL-MIT   Hgt NTUS JPL-MIT   Hgt COCO JPL-MIT
   Hgt COCO MIT-NCL   Hgt HRAO MIT-NCL   Hgt NTUS MIT-NCL
   Hgt MALI MIT-NCL          

129 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 AMCT ANKR AOML AREQ AUCK BAHR
   BOGO BOGT BOR1 BRMU BRUS CAGL CASA CEDU CHAT CHUR
   CICE CRO1 DGAR DRAO DUBO EISL ELAT FAIR FLIN FORT
   GILB GLSV GODE GOL2 GOLD GOPE GRAS GRAZ GUAM HERS
   HOFN HOLB IRKT JOZE JPLM KABR KARR KATZ KELY KIRU
   KOKB KOSG KOUR KSTU KUNM KWJ1 LAMA LPGS MAC1 MAD2
   MADR MAG0 MAS1 MATE MAW1 MDO1 MEDI METS NANO NICO
   NLIB NOTO NOUM NRC1 NSSP NYA1 NYAL OBER ONSA PENC
   PIE1 POL2 POTS PRDS QUIN RAMO REYK RIOG RIOP SANT
   SCH2 SELE SHAO SJDV SOL1 STJO SUWN TAEJ TELA THTI
   THU1 TID2 TIDB TIXI TOUL TOW2 TRO1 TSKB UCLU UPAD
   URUM USNA USNO USUD VESL VILL WES2 WHIT WILL WSLR
   WSRT WTZR XIAN YAKA YAKZ YAR2 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:

            129    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.1       1.2       1.1        6.2        5.7        6.3 
Lon        1.7       3.3       3.2        9.6        8.9        6.9 
Hgt        2.3       2.7       3.0       13.5       14.8       13.9 
3D         3.0       4.4       4.5       17.7       18.2       16.7

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

       136    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.137     0.069     0.251     14.085     19.363      6.567

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      -3.2     2.1    -1.6     2.1     3.1     2.5        -0.9      0.1
MIT      -1.7     1.4    -1.1     1.5    -0.4     1.6        -0.6      0.1
NCL      -4.1     2.9    -4.9     2.7    10.1     4.2        -0.6      0.1

REMARKS:
 FILE mit0991g.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:
   AREQ  B 42202M005
   AREQ  A 42202M005
   GALA  A 42005M001
   GALA  B 42005M001
   MDVO  A 12309M001
   MDVO  B 12309M002
   TROM  B 10302M006
   TROM  A 10302M003
   NYAL  B 10317M003
   NYAL  A 10317M001

 STATION NAME/POINT CODES CHANGED IN mit0991g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
MASP  B MAS1  A 31303M002
MDVO  B MDVO  A 12309M002
TROM  B TRO1  A 10302M006
NYAL  B NYA1  A 10317M003

      4 Changes in all.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0991g.snx :
   Stations: BRAZ HART KIT3 LHAS OHIG

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0991g.snx :
   Stations: BRAZ HART KIT3 LHAS OHIG

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0991g.snx :
   Stations: BRAZ HART KIT3 LHAS MAD2 OHIG

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              
    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       
              MDV1 A              
    12309M001        MDVO A       
    10317M003 NYA1 A NYAL B NYA1 A
    12355M001 PETR A              
              PETP A              
    12355M002        PETP A       
                     PETR A       
    92201M006 TAHI A              
    92201M009 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 YAKA A       
              YAKZ A YAKZ 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  URUM A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  RIOG A  URUM 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:
 cod09917.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09917.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09917.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09917.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09917.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09917.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09917.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
============= ====== ====== ====== ====== ====== ====== ======
    50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
    92201M009 TAHI A                      THTI A        THTI A
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
    12309M002 MDVO A        MDVO B        MDVO A        MDVO A
    31303M002 MASP A MASP B MASP B MAS1 A        MASP B MAS1 A
    12353M001 YAKZ A                      YAKA A YAKA A YAKZ A
    12355M002 PETR A               PETP A               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
    22601M001 NTUS A        NTUS A NTUS A NTUS A        NTUS A
    22601M002                                    NTUS A       
    42005M001 GALA A               GALA A GALA A GALA B GALA A
    13407S012               MADR A        MAD2 A MADR A MAD2 A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH A  URUM 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]>]