Subject: [IGSREPORT-5013] Wk 0955 G-SINEX Comparisons
From: AC Coordinator / NRCan GSDivision
Date: Tue, 16 Jun 1998 9:42:54 PDT

******************************************************************************
IGS Electronic Report    Tue Jun 16  9:42:54 PDT 1998      Message Number 5013
******************************************************************************

Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0955 G-SINEX Comparisons

Subject: Wk 0955 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0955   
(APR 26, 1998 - MAY 2, 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:
   mit0955g.snx at cddis.gsfc.nasa.gov
   jpl0955g.snx at cddis.gsfc.nasa.gov
   ncl0955g.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))

jpl0955g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0955g.snx: BARB    .110   .000   .000   .128   .000   .000   .000   .000   .000
ncl0955g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
   - Unresolvable (no log file)

mit0955g.snx: HRAO    .110   .000   .000   .128   .000   .000   .083   .000   .000
ncl0955g.snx: HRAO    .110   .000   .000   .128   .000   .000   .000   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity .081 M.

jpl0955g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0955g.snx: INEG    .080   .000   .001   .079  -.001   .001   .130   .000   .000
   - Unresolvable (no log file)

jpl0955g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
mit0955g.snx: MDVO    .078   .000  -.003   .074  -.003  -.001   .146   .000   .000
ncl0955g.snx: MDVO    .000   .000   .000   .000   .000   .000   .146   .000   .000
   - All 3 wrong. Should be L1/L2 offset both .069 M., eccentricity .146 M.

jpl0955g.snx: NOUM    .110   .000   .000   .128   .000   .000   .000   .000   .000
mit0955g.snx: NOUM    .078   .000  -.003   .074  -.003  -.001  -.002  -.005   .006
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.000 M.

jpl0955g.snx: TROM    .110   .000   .000   .128   .000   .000  2.369   .000   .000
mit0955g.snx: TROM    .078   .000   .000   .096   .000   .000  2.475   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 2.369 M.

mit0955g.snx: CAGL    .110   .000   .000   .128   .000   .000   .010   .000   .000
mit0955g.snx: HFLK    .078   .000   .000   .096   .000   .000   .011   .000   .000
jpl0955g.snx: KOUR    .110   .000   .000   .128   .000   .000   .045   .000   .000
jpl0955g.snx: MEDI    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0955g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0955g.snx: NYA1    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0955g.snx: SFER    .075   .002  -.001   .069  -.001   .002  1.626   .000   .000
mit0955g.snx: SUTH    .110   .000   .000   .128   .000   .000   .085   .000   .000

FILE ncl0955g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0955g.snx                             
(MODEL / SER. NO. / L1 (UNE) / L2 (UNE))
(UNE = Up North East (metres))
   DORNE MARGOLIN B     -----    .078   .000   .000   .096   .000   .000 (Correct)
   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 mit0955g.snx                             
   GALA Multiple Sites       
 
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
   Stations: GALA 
 
ncl0955g.snx: MISSING BLOCKS SITE/ANTENNA,                                      
              SITE/GPS_PHASE_CENTER & SITE/ECCENTRICITY                         

CONFIDENCE LEVEL FOR OUTLIER DETECTION (ITRF96): 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat AREQ MIT-JPL   Lat BOGT MIT-JPL   Lat DAV1 MIT-JPL
   Lon BOGT JPL-NCL   Lon HOB2 JPL-NCL   Lon AREQ JPL-NCL
   Lon TIDB JPL-NCL   Lon NRC1 MIT-JPL   Lon TIDB MIT-JPL
   Lon AREQ MIT-JPL   Lon FORT MIT-JPL   Lon HOB2 MIT-JPL
   Lon BOGT MIT-JPL   Lon NRC1 MIT-NCL   Hgt TROM MIT-JPL
   Hgt TROM MIT-NCL          

69 GLOBAL STATIONS:
   ALBH ALGO ANKR ASC1 AUCK BAHR BRMU CAS1 CHAT COCO
   CRO1 DGAR DRAO EISL FAIR GODE GOLD GRAZ GUAM HARK
   IRKT KELY KERG KIRU KIT3 KOKB KOSG KSTU KWJ1 LHAS
   LPGS MAC1 MADR MALI MATE MCM4 MDO1 METS MKEA NICO
   NLIB OHIG ONSA PERT PETR PIE1 POL2 POTS RCM6 REYK
   SANT SELE SHAO STJO TAEJ THU1 TSKB USNO USUD VILL
   WES2 WHIT WSRT WTZR WUHN YAR1 YELL ZECK ZWEN 

41 FIDUCIAL STATIONS:
   ALGO BRMU DAV1 DRAO FAIR FORT GODE GOLD GRAZ GUAM
   HOB2 IRKT KERG KIT3 KOKB KOSG KWJ1 LHAS MAC1 MADR
   MALI MATE MDO1 NLIB OHIG ONSA PERT PIE1 POTS SANT
   SHAO THU1 TIDB TROM TSKB VILL WES2 WTZR YAR1 YELL
   ZWEN         

AVERAGE COORDINATE RMS USING ITRF96:

             69    GLOBAL  STATIONS         41   FIDUCIAL   STATIONS
        MIT-JPL   MIT-NCL   JPL-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.4       0.9       0.9        5.0        5.3        5.2 
Lon        0.9       0.8       0.9        6.2        6.9        6.4 
Hgt        2.7       2.9       1.7       15.7       10.8       10.5 
3D         3.1       3.1       2.1       17.6       13.9       13.4

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

        73    GLOBAL  STATIONS         41   FIDUCIAL   STATIONS
   JPL-NCL   MIT-JPL   MIT-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.087     0.159     0.096      2.981      4.227      2.928

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      -3.9     2.9    21.0     2.9   -24.8     4.5        -0.7      0.1
MIT      -3.6     2.8    12.5     2.9   -16.3     4.3        -0.8      0.2
NCL      -2.5     3.0    16.3     3.2   -15.4     4.7        -0.5      0.2

REMARKS:

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0955g.snx :
   Stations: BRAZ MASP

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0955g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0955g.snx :
   Stations: BRAZ HART MASP

IERS DOMES NO    IGS    MIT    NCL
============= ====== ====== ======
    42202M005 AREQ A AREQ A AREQ A
              ARE1 A              
    42005M001 GALA A GALA A GALA A
              GAL1 A GALA B       
    40451M123 GODE A GODE A GODE A
    40451S003 USNO A        USNO A
    40405S031 GOL2 A GOL2 A GOLD A
              GOLD A GOLD A       
              GOL1 A              
    30302M007 HARK A HART B HARK A
              HART A              
              HAR1 A              
    30302M004 HRAO A HRAO A HRAO A
    13407S012 MAD2 A MADR A MADR A
              MADR A              
    31303M002 MAS1 A              
              MASP A              
    31303M001        MAS1 A       
    12309M002 MDVO A        MDVO A
              MDV1 A              
    12309M001        MDVO A       
    10317M003 NYA1 A NYA1 A       
    10317M001 NYAL A NYAL A NYAL A
    40499S020 RCM6 A RICH A RCM6 A
              RICH A              
    50103M108 TID2 A TIDB A TIDB A
              TIDB A TID2 A       
    10302M006 TRO1 A TRO1 A       
    10302M003 TROM A TROM A TROM A
    12353M001 YAKA A              
              YAKZ A              
    50107M004 YAR1 A YAR1 A YAR1 A
              YAR2 A              
 
MISSING IERS DOMES NOS AT IGS:
-----------------------------
  BAKO A  BISH A  ELAT A  INEG A  KATZ A  RIOG A  TELA A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  MAD2 A  SFER A  ASC1 A  HOFN A  LPGS A  CRO1 A  SCH2 A  RIOG A  NRC1 A  SOL1 A
  USNA A  USNO A  AOML A  RCM6 A  CHUR A  DUBO A  FLIN A  INEG A  PRDS A  WILL A
  WSLR A  NANO A  UCLU A  HOLB A  WHIT A  MKEA A  KWJ1 A  NOUM A  PETR A  MAG0 A
  YAKZ A  YAKA A  SUWN A  WUHN A  BAKO A  COCO A  KSTU A  SELE A  BISH A  DGAR A
  BAHR A  NSSP A  ZECK A  KATZ A  ELAT A  TELA A  NICO A  HARK A  NOTO A  MEDI A
  HFLK A  OBER A  CAGL A  WSRT A  TOUL A  EBRE A

IERS DOMES NO    COD    NRC    ESA    GFZ    JPL    NOA    SIO
============= ====== ====== ====== ====== ====== ====== ======
    30302M004 HRAO A        HRAO A                            
    30302M007 HART A HART B HART B HARK A        HART B       
    30302M002        HART B               HARK A              
                                          HRAO A              
    31303M002 MASP A MASP B MASP B MAS1 A        MASP B       
    31303M001                                           MASP A
    12309M002 MDVO A        MDVO B                            
    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
    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
    50107M004 YAR1 A YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
    42005M001 GALA A               GALA A        GALA B       
    10317M003 NYAL A               NYA1 A                     
    10317M001        NYAL A NYAL A        NYAL A NYAL A NYAL A
                                          NYA1 A              
    10302M006 TROM A               TRO1 A                     
    10302M003               TROM A               TROM A TROM 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  COCO A  DGAR A  SUTH A  KWJ1 A  MAG0 A  MKEA A  NOUM A  PETR A
  LPGS A  NICO A  GALA A  SFER A  ZECK A  SELE A  USNO A  YAKZ 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  CHUR A  DUBO A  FLIN A  INEG A  PRDS A  WILL A  WSLR A
  NANO A  UCLU A  HOLB A  WHIT A  MKEA A  KWJ1 A  NOUM A  PETR A  MAG0 A  YAKA A
  YAKZ A  SUWN A  WUHN A  BAKO A  COCO A  KSTU A  SELE A  DGAR A  BAHR A  NSSP A
  ZECK A  KATZ A  ELAT A  TELA A  NICO A  HARK A  NOTO A  MEDI A  HFLK A  OBER A
  CAGL A  WSRT A  TOUL A  EBRE A

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

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