Subject: [IGSREPORT-5771] Wk 0993 G-SINEX Comparisons
From: NRCan GSDivision
Date: Wed, 10 Feb 1999 10:36:08 PST

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IGS Electronic Report    Wed Feb 10 10:36:08 PST 1999      Message Number 5771
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Author: NRCan GSDivision
Subject: Wk 0993 G-SINEX Comparisons

Subject: Wk 0993 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0993   
(JAN 17, 1999 - JAN 23, 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    *** THIS ALGORITHM AND FORMAT WILL SHORTLY BE SUPERSEDED.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:
   jpl0993g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   mit0993g.snx at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
   ncl0993g.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))
jpl0993g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001  1.676   .000   .000
mit0993g.snx: BAKO    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0993g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
mit0993g.snx: BISH    .110   .000   .000   .128   .000   .000   .085   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0993g.snx: BSHM    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0993g.snx: BSHM    .081   .000  -.001   .078  -.002   .004   .000   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0993g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0993g.snx: INEG    .081   .000  -.001   .078  -.002   .004   .100   .000   .000
   - Unresolvable. No log file. Antenna parameters not listed in igs.snx.

jpl0993g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
mit0993g.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.

jpl0993g.snx: PETP    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0993g.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.

jpl0993g.snx: PETR    .110   .000   .000   .128   .000   .000   .080   .000   .000
mit0993g.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.

mit0993g.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).

jpl0993g.snx: HFLK    .078   .000   .000   .096   .000   .000   .000   .000   .000
jpl0993g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0993g.snx: SFER    .075   .002  -.001   .069  -.001   .002  1.626   .000   .000
jpl0993g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0993g.snx: TROM    .110   .000   .000   .128   .000   .000  2.369   .000   .000
jpl0993g.snx: ZIMM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000

FILE ncl0993g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

 
ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0993g.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   68.3 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   72.4 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 MCM4   68.7 mm.

CONFIDENCE  LEVEL  FOR OUTLIER DETECTION             : 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat CAS1 MIT-NCL   Lat KERG MIT-NCL   Lon MALI JPL-NCL
   Lon IISC JPL-NCL   Lon RAMO JPL-NCL   Lon BAHR JPL-NCL
   Lon ASC1 MIT-NCL   Lon MALI MIT-NCL   Hgt HARK JPL-MIT
   Hgt COCO JPL-MIT   Hgt AMC2 JPL-MIT   Hgt WUHN JPL-NCL
   Hgt HRAO MIT-NCL   Hgt COCO MIT-NCL     

124 GLOBAL STATIONS:
   ALBH ALGO ALIC ANKR AOML AREQ AUCK BOGO BOR1 BRMU
   BRUS CAGL CASC CEDU CHAT CHUR 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 IRKT JOZE JPLM KABR KARR KATZ KELY KIRU KOKB
   KOSG KOUR KSTU KUNM KWJ1 LAMA LPGS MAC1 MAD2 MADR
   MAG0 MAS1 MATE MATH MAW1 MDO1 MEDI METS NANO NICO
   NLIB NOTO NOUM NSSP NTUS NYA1 NYAL OBER ONSA PENC
   PERT PIE1 POL2 POTS PRDS QUIN REYK RIOG SANT SCH2
   SELE SHAO SJDV SOL1 STJO SUWN TELA THU1 TID2 TIDB
   TOUL TOW2 TRO1 TSKB UCLU UPAD USNA USNO USUD VESL
   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        1.3       1.1       1.4        5.6        5.4        5.5 
Lon        1.5       3.1       2.9        9.6        9.0        7.2 
Hgt        2.6       2.9       4.0       14.9       15.6       15.1 
3D         3.3       4.4       5.1       18.6       18.8       17.6

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

       133    GLOBAL  STATIONS         42   FIDUCIAL   STATIONS
   JPL-MIT   JPL-NCL   MIT-NCL JPL-ITRF96 MIT-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.153     0.070     0.291     11.946     17.808      5.831

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      -1.9     1.9    -0.2     1.9     0.6     2.5        -0.6      0.1
MIT      -0.6     1.3     0.3     1.4    -3.4     1.8        -0.6      0.1
NCL      -0.8     3.0    -4.4     2.9    -0.9     4.2        -0.5      0.1

REMARKS:
 FILE mit0993g.snx: STDs for daily EOPs listed in SOLUTION/APRIORI block, with-
	            out  corresponding  covariances in SOLUTION/MATRIX_APRIORI
		    block. NOTE: A priori UT STD 6.66667 ms. < all  correspond-
		    ing  UT STDs in the SOLUTION/ESTIMATE block,  which are in
		    turn 2 orders of magnitude greater than weekly UT STDs pri-
		    or to week 980; e.g., .0279325 ms. for week 979.  Hence UT
		    was deleted prior to deconstraining. Was also forced to de-
		    lete EOPs  XPO and YPO in order to allow deconstraining.

 STATION NAME/POINT CODES CHANGED IN ncl0993g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
NRC1  A MATH  A 40114M001

      1 Change  in all.

 MULTIPLY-USED 4-LETTER STATION NAME CODES IN mit0993g.snx:
   TROM  B 10302M006
   TROM  A 10302M003
   NYAL  B 10317M003
   NYAL  A 10317M001

 STATION NAME/POINT CODES CHANGED IN mit0993g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
NRC1  A MATH  A 40114M001
TROM  B TRO1  A 10302M006
NYAL  B NYA1  A 10317M003

      3 Changes in all.

 STATION NAME/POINT CODES CHANGED IN jpl0993g.snx 
 ENFORCED FROM TEMPLATE FILE igs.snx .

    Old     New      IERS
Code/Pt Code/Pt  DOMES NO
------- -------  --------
NRC1  A MATH  A 40114M001

      1 Change  in all.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0993g.snx :
   Stations: BRAZ KIT3 LHAS OHIG

FOR THE FILE mit0993g.snx, EOPS XPO, YPO and UT WERE DELETED AND THE 
A PRIORI COVARIANCE MATRIX WAS SCALED UPWARD (ALL ELEMENTS) BY A FAC-
TOR OF 0.05% PRIOR TO DECONSTRAINING.

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0993g.snx :
   Stations: BRAZ HART KIT3 LHAS OHIG

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0993g.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       
    10317M003 NYA1 A NYAL B NYA1 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
    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              
 
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:
 cod09937.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 emr09937.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 esa09937.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 gfz09937.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 jpl09937.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 ngs09937.ssc at cddis.gsfc.nasa.gov or cddisa.gsfc.nasa.gov
 sio09937.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
    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
    10302M006 TROM A               TRO1 A               TRO1 A
    12355M002 PETR A               PETP A               PETP A
    12353M001 YAKZ A                             YAKA A YAKZ 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
    30302M007 HART A HART B HART B HARK A HARK A HART B HARK A
    10317M003 NYAL A               NYA1 A NYA1 A        NYA1 A
    22306M002 IISC A        IISC B IISC A IISC A IISC B IISC 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  RIOG A
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  RAMO 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]>]