Subject: [IGSREPORT-5696] Wk 0987 G-SINEX Comparisons
From: NRCan GSDivision
Date: Fri, 22 Jan 1999 14:06:56 PST

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IGS Electronic Report    Fri Jan 22 14:06:56 PST 1999      Message Number 5696
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Author: NRCan GSDivision
Subject: Wk 0987 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0987   
(DEC 6, 1998 - DEC 12, 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:
   jpl0987g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0987g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0987g.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))

jpl0987g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.676   .000   .000
mit0987g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.616   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0987g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
mit0987g.snx: BISH    .110   .000   .000   .128   .000   .000   .085   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0987g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0987g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0987g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0987g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .066   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0984g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
mit0984g.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.

jpl0987g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0987g.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 for 12355M001,
     while MIT lists it for 12355M002.

jpl0987g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0987g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0987g.snx: SFER    .075   .002  -.001   .069  -.001   .002  1.626   .000   .000
jpl0987g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0987g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000
jpl0987g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000

FILE ncl0987g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0987g.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 mit0987g.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   61.8 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   64.7 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   62.9 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat LPGS JPL-MIT   Lat KERG JPL-MIT   Lat HARK JPL-MIT
   Lat HRAO JPL-MIT   Lat SELE JPL-MIT   Lat GOUG JPL-MIT
   Lat VESL JPL-MIT   Lat GOUG MIT-NCL   Lat HRAO MIT-NCL
   Lat HARK MIT-NCL   Lat KERG MIT-NCL   Lon CAS1 JPL-MIT
   Lon COCO JPL-MIT   Lon YAR2 JPL-MIT   Lon DAV1 JPL-MIT
   Lon KERG JPL-MIT   Lon HOB2 JPL-MIT   Lon RIOG JPL-MIT
   Lon CAS1 MIT-NCL   Hgt LPGS JPL-MIT   Hgt GOUG JPL-MIT
   Hgt HARK JPL-MIT   Hgt GOUG MIT-NCL   Hgt HRAO MIT-NCL
   Hgt HARK MIT-NCL          

124 GLOBAL STATIONS:
   ALBH ALGO ALIC AMC2 ANKR AOML AREQ ASC1 AUCK BAHR
   BOGO BOGT BOR1 BRMU BRUS CAGL CASC CEDU CHAT CHUR
   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 MAC1 MAD2 MADR MAG0
   MALI MAS1 MATE MAW1 MDO1 MEDI METS NANO NICO NLIB
   NOTO NRC1 NSSP NTUS NYA1 NYAL OBER ONSA PENC PERT
   PIE1 POL2 POTS PRDS QUIN RAMO REYK SANT SCH2 SHAO
   SJDV SOL1 STJO SUWN TAEJ TELA THTI THU1 TID2 TIDB
   TIXI TOUL TOW2 TRO1 TSKB UCLU URUM USNA USNO USUD
   VILL WES2 WHIT WILL WSLR WSRT WTZR XIAN YAKA 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:

            124    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
        JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.5       0.9       1.4        6.7        5.7        6.2 
Lon        2.1       0.9       1.9        7.1        6.3        6.8 
Hgt        3.9       2.2       3.7       13.5       14.4       15.3 
3D         4.7       2.6       4.4       16.6       16.7       17.8

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

       128    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.213     0.135     0.259      7.346      9.775      7.056

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      -5.3     1.8    -8.1     1.9    -1.2     2.4        -0.9      0.1
MIT       0.2     1.4   -10.5     1.4    -2.0     1.6        -0.5      0.1
NCL      -7.7     2.7   -14.8     2.5    -0.3     3.9        -0.7      0.1

REMARKS:
 FILE mit0987g.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 IN mit0987g.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 mit0987g.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 jpl0987g.snx :
   Stations: BRAZ KIT3 LHAS OHIG TROM

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0987g.snx :
   Stations: BRAZ KIT3 LHAS OHIG

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0987g.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 AMC2 A              
    40472S004        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 B MDVO A
              MDV1 A              
    12309M001        MDVO A       
    12355M001 PETP A              
    12355M002        PETP A       
    50103M108 TID2 A TIDB A TID2 A
              TIDB A TID2 A TIDB A
    10302M006 TRO1 A TROM B TRO1 A
    12353M001 YAKA 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  URUM A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  RIOG A  INEG 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:
 cod09877.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09877.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09877.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09877.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09877.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09877.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09877.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        HART B HARK A
    50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
    31303M002 MASP A MASP B MASP B MAS1 A        MASP B MAS1 A
    12309M002 MDVO A        MDVO B                      MDVO A
    12353M001 YAKZ A                                    YAKZ A
                                                        YAKA 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
    22306M002 IISC A        IISC B IISC A IISC A IISC B IISC A
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ 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
    42005M001                      GALA A GALA A GALA B GALA A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH A  URUM A  RIOG 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]>]