Subject: [IGSREPORT-5008] Wk 0950 G-SINEX Comparisons
From: AC Coordinator / NRCan GSDivision
Date: Tue, 16 Jun 1998 9:37:16 PDT

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IGS Electronic Report    Tue Jun 16  9:37:16 PDT 1998      Message Number 5008
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0950 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0950   
(MAR 22, 1998 - MAR 28, 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 stations  not  present  in  all GNAAC combined SINEX files were de-
      leted  from all three combined solutions.  Every solution was then sub-
      jected to a 7-parameter transformation  into  a common reference system
      (the 47 ITRF96 station positions). 

   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:
   mit0950g.snx at cddis.gsfc.nasa.gov
   jpl0950g.snx at cddis.gsfc.nasa.gov
   ncl0950g.snx at cddis.gsfc.nasa.gov

GNAACs: MIT JPL NCL

STATIONS WITH INCONSISTENT ANTENNA ECCENTRICITY INFORMATION:
(FILE: / STATION / L1 (UNE) / L2 (UNE) / ECCENTRICITY (UNE))
(UNE = Up North East (metres))

jpl0950g.snx: BISH    .075   .002  -.001   .069  -.001   .002   .046   .000   .000
mit0950g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
   - Unresolvable (no log file)

jpl0950g.snx: ELAT    .069   .000   .000   .068   .000   .000  -.011   .000   .000
mit0950g.snx: ELAT    .078   .000  -.003   .074  -.003  -.001  -.011   .000   .000
   - Unresolvable (no log file)

jpl0950g.snx: KATZ    .069   .000   .000   .068   .000   .000  -.012   .000   .000
mit0950g.snx: KATZ    .078   .000  -.003   .074  -.003  -.001  -.012   .000   .000
   - Unresolvable (no log file)

jpl0950g.snx: NOUM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
mit0950g.snx: NOUM    .075   .002  -.001   .069  -.001   .002   .000   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.000 M.

jpl0950g.snx: TELA    .069   .000   .000   .068   .000   .000   .000   .000   .000
mit0950g.snx: TELA    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable (no log file)

jpl0950g.snx: TROM    .078   .000   .000   .096   .000   .000  2.473   .000   .000
mit0950g.snx: TROM    .078   .000   .000   .096   .000   .000  2.473   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 2.369 M.

jpl0950g.snx: CAGL    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0950g.snx: EBRE    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
jpl0950g.snx: HARK    .110   .000   .000   .128   .000   .000  9.754   .000   .000
jpl0950g.snx: HOFN    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0950g.snx: HRAO    .110   .000   .000   .128   .000   .000  9.754   .000   .000
jpl0950g.snx: KOUR    .078   .000   .000   .096   .000   .000   .132   .000   .000
jpl0950g.snx: LPGS    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0950g.snx: MALI    .078   .000   .000   .096   .000   .000   .222   .000   .000
jpl0950g.snx: MEDI    .110   .000   .000   .128   .000   .000   .146   .000   .000
jpl0950g.snx: MOIN    .110   .000   .000   .128   .000   .000   .994   .000   .000
jpl0950g.snx: NICO    .110   .000   .000   .128   .000   .000   .000   .000   .000
mit0950g.snx: NYAL    .078   .000   .000   .096   .000   .000  5.216   .004   .001
jpl0950g.snx: SELE    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0950g.snx: SFER    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0950g.snx: SOFI    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0950g.snx: UPAD    .078   .000  -.003   .074  -.003  -.001  1.962   .000   .000
jpl0950g.snx: WSRT    .110   .000   .000   .128   .000   .000   .380   .000   .000
jpl0950g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000
jpl0950g.snx: YAR1    .078   .000   .000   .096   .000   .000   .073   .000   .000
jpl0950g.snx: ZECK    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0950g.snx: ZIMM    .069   .000   .000   .068   .000   .000   .000   .000   .000

FILE ncl0950g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

CONFIDENCE LEVEL FOR OUTLIER DETECTION (ITRF96): 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat KERG MIT-JPL   Lat OHIG MIT-NCL   Lat SANT MIT-NCL
   Lon FORT JPL-NCL   Lon EISL MIT-JPL   Lon SHAO MIT-JPL
   Lon HOB2 MIT-JPL   Hgt TAHI MIT-NCL   Hgt SANT MIT-NCL
   Hgt AREQ MIT-NCL   Hgt NTUS MIT-NCL   Hgt MCM4 MIT-NCL

52 GLOBAL STATIONS:
   ALGO ASC1 AUCK BAHR BOGT BRMU CAS1 CHAT COCO CRO1
   DAV1 DGAR DRAO FAIR GODE GOLD GUAM IISC IRKT KELY
   KIT3 KOKB KOSG KSTU KWJ1 LHAS MAC1 MADR MATE MDO1
   METS MKEA NLIB NRC1 ONSA PERT PIE1 POL2 POTS RCM6
   REYK STJO TIDB TROM TSKB USNO USUD WES2 WTZR YAR1
   YELL ZWEN        

37 FIDUCIAL STATIONS:
   ALGO BRMU DAV1 DRAO FAIR FORT GODE GOLD GUAM HOB2
   IRKT KERG KIT3 KOKB KOSG KWJ1 LHAS MAC1 MADR MATE
   MDO1 NLIB OHIG ONSA PERT PIE1 POTS SANT SHAO TIDB
   TROM TSKB WES2 WTZR YAR1 YELL ZWEN   

AVERAGE COORDINATE RMS USING ITRF96:

             52    GLOBAL  STATIONS         37   FIDUCIAL   STATIONS
        MIT-JPL   MIT-NCL   JPL-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.7       2.1       1.6        4.1        4.7        5.0 
Lon        2.4       2.1       2.1        5.9        6.1        6.7 
Hgt        3.1       4.1       3.5       10.6       10.0       10.8 
3D         4.3       5.0       4.4       12.8       12.6       13.7

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

        63    GLOBAL  STATIONS         37   FIDUCIAL   STATIONS
   JPL-NCL   MIT-JPL   MIT-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.211     0.775     0.585      3.383      4.432      2.499

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      -7.3     3.0    10.1     3.1   -29.4     5.0        -1.0      0.1
MIT      -8.7     2.0    -2.7     2.0   -34.2     3.0        -0.8      0.2
NCL      -9.4     4.2    18.8     4.7    -5.2     7.4        -0.6      0.2

REMARKS:

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0950g.snx :
   Stations: BRAZ HART MASP VILL

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0950g.snx :
   Stations: BRAZ VILL

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0950g.snx :
   Stations: BRAZ GRAZ HART MASP THU1 VILL

IERS DOMES NO    JPL    MIT    NCL
============= ====== ====== ======
    42202M005 AREQ A AREQ A AREQ A
              ARE1 A              
    40451M123 GODE A GODE A GODE A
    40451S003               USNO A
    40405S031 GOL2 A GOL2 A GOLD A
              GOL1 A GOLD A       
              GOLD A              
    30302M002 HART A              
              HARK A              
              HAR1 A              
              HRAO A              
    30302M007        HARK A HARK A
    30302M004        HRAO A       
    22306M001 IISC A              
              IIS1 A              
    22306M002        IISC A IISC A
    13407S012 MADR A MAD2 A MADR A
              MAD2 A MADR A       
    31303M002 MAS1 A              
    31303M001 MASP A MAS1 A       
    12309M002 MDVO A              
    12309M001        MDVO A       
    22601M001 NTUS A        NTUS A
    22601M002        NTUS A       
    40499S018 RICH A              
    40499S020        RCM6 A RCM6 A
                     RICH A       
    50103M108 TIDB A TIDB A TIDB A
              TID2 A TID2 A       
    50107M004 YAR1 A YAR1 A YAR1 A
              YAR2 A              
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  AOML A  ASC1 A  BAHR A  BISH A  CASA A  CHUR A  COCO A  DGAR A  EBRE A  ELAT A
  FLIN A  HFLK A  HOLB A  KATZ A  KWJ1 A  MAG0 A  MEDI A  MKEA A  MOIN A  NANO A
  NOTO A  NOUM A  PETR A  LPGS A  NICO A  SFER A  ZECK A  HOFN A  CAGL A  PRDS A
  RCM6 A  RIOG A  SELE A  SOFI A  SOL1 A  SCH2 A  TELA A  UCLU A  USNA A  USNO A
  WHIT A  WSLR A  XIAN A  YAKA A  YAKZ A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  SFER A  HOFN A  SCH2 A  RIOG A  SOL1 A  USNA A  USNO A  AOML A  MOIN A  CHUR A
  DUBO A  FLIN A  PRDS A  CASA A  WILL A  WSLR A  NANO A  UCLU A  HOLB A  MKEA A
  NOUM A  PETR A  MAG0 A  YAKZ A  YAKA A  XIAN A  SELE A  BISH A  ZECK A  KATZ A
  ELAT A  TELA A  NICO A  SOFI A  NOTO A  MEDI A  HFLK A  OBER A  CAGL A  WSRT A
  EBRE A

IERS DOMES NO    COD    NRC    ESA    GFZ    JPL    NOA    SIO
============= ====== ====== ====== ====== ====== ====== ======
    22306M002 IISC A        IISC B IISC A        IISC A       
    22306M001                             IISC A        IISC A
    50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
    30302M004 HRAO A        HRAO A                            
    30302M007 HART A HART B HART B HARK A        HART B       
    30302M002        HART B               HARK A              
    31303M002 MASP A MASP B MASP B MAS1 A        MASP B       
    31303M001                                           MASP A
    12309M002 MDVO A                      MDVO A              
    12309M001                                           MDVO A
    40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD B GOLD A
    40451S003 USNO A USNO A USNO A                            
    40451M123 GODE A        GODE A               GODE A GODE A
    40499S020 RICH A RCM6 A        RCM6 A        RCM6 A       
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
    50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
    22601M001 NTUS A               NTUS A NTUS A              
    22601M002                                    NTUS A       
    13407S012               MADR A        MAD2 A MADR A MADR A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH A  RIOG A
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  ASC1 A  BAHR A  CASA A  COCO A  DGAR A  KWJ1 A  MAG0 A  MEDI A  MKEA A  PETR A
  LPGS A  RCM6 A  USNO A  XIAN A  YAKA A  YAKZ A
 
MISSING IERS DOMES NOS AT NOA:
-----------------------------
  MKEA A
 
MISSING IERS DOMES NOS AT SIO:
-----------------------------
  MAD2 A  SFER A  ASC1 A  HOFN A  LPGS A  CRO1 A  SCH2 A  NRC1 A  SOL1 A  USNA A
  USNO A  AOML A  RCM6 A  MOIN A  CHUR A  DUBO A  FLIN A  PRDS A  WILL A  WSLR A
  NANO A  UCLU A  HOLB A  WHIT A  TAHI A  MKEA A  KWJ1 A  NOUM A  PETR A  MAG0 A
  YAKA A  YAKZ A  WUHN A  XIAN A  NTUS A  COCO A  KSTU A  SELE A  DGAR A  BAHR A
  ZECK A  KATZ A  ELAT A  TELA A  NICO A  HARK A  SOFI A  NOTO A  MEDI A  HFLK A
  OBER A  CAGL A  WSRT A  EBRE A

-- 
David Hutchison
Geodetic Survey of Canada
Ottawa, Ontario, Canada
Internet: [email-masked]

[Mailed From: David Hutchison <[email-masked]>]