Subject: [IGSREPORT-5100] Wk 0957 G-SINEX Comparisons
From: AC Coordinator / NRCan GSDivision
Date: Thu, 9 Jul 1998 17:36:45 PDT

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IGS Electronic Report    Thu Jul  9 17:36:45 PDT 1998      Message Number 5100
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0957 G-SINEX Comparisons

Subject: Wk 0957 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0957   
(MAY 10, 1998 - MAY 16, 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:
   mit0957g.snx at cddis.gsfc.nasa.gov
   jpl0957g.snx at cddis.gsfc.nasa.gov
   ncl0957g.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))

jpl0957g.snx: BARB    .000   .000   .000   .000   .000   .000   .000   .000   .000
mit0957g.snx: BARB    .110   .000   .000   .128   .000   .000   .000   .000   .000
   - Unresolvable (no log file)

jpl0957g.snx: INEG    .000   .000   .000   .000   .000   .000   .130   .000   .000
mit0957g.snx: INEG    .080   .000   .001   .079  -.001   .001   .130   .000   .000
   - Unresolvable (no log file)

jpl0957g.snx: MDVO    Antenna information missing               .146   .000   .000
mit0957g.snx: MDVO    Antenna information missing               .229   .005  -.006
   - MIT has wrong eccentricity. Should be .146 M. up, 0 M. north, east.
   - Latest log file indicates L1/L2 offset should be 0.0692 M.
     (Not listed in igs.snx.)

mit0957g.snx: CRO1    .110   .000   .000   .128   .000   .000   .061   .000   .000
jpl0957g.snx: MONP    .000   .000   .000   .000   .000   .000   .119   .000   .000
jpl0957g.snx: SUTH    .000   .000   .000   .000   .000   .000   .119   .000   .000
mit0957g.snx: TIDB    .110   .000   .000   .128   .000   .000   .000   .000   .000
mit0957g.snx: TROM    .078   .000   .000   .096   .000   .000  2.473   .000   .000

FILE ncl0957g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

ANTENNA PHASE CENTRE CONFLICTS IN FILE jpl0957g.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 mit0957g.snx                             
   GALA Multiple Sites       
 
SITES AFFECTED BY ABOVE CONFLICTS, NON-FIDUCIAL SITES SUBSEQUENTLY EXCLUDED:
   Stations: GALA 
 
CONFIDENCE LEVEL FOR OUTLIER DETECTION (ITRF96): 99%
OUTLIERS REJECTED (COORD/STATION/GNAACs):
   Lat TIDB JPL-NCL   Lat EISL MIT-NCL   Lat TIDB MIT-NCL
   Lon KOUR MIT-NCL   Lon AREQ MIT-NCL   Lon LPGS MIT-NCL
   Hgt WUHN JPL-NCL   Hgt CHAT MIT-NCL   Hgt CAS1 MIT-NCL
   Hgt MDO1 MIT-NCL   Hgt WUHN MIT-NCL     

51 GLOBAL STATIONS:
   ALGO ASC1 AUCK BAHR BRMU COCO DAV1 DGAR DRAO FAIR
   FORT GUAM HARK HOB2 IRKT KELY KERG KIT3 KOKB KOSG
   KSTU KWJ1 LHAS MAC1 MALI MATE MCM4 METS MKEA NLIB
   NRC1 NTUS OHIG ONSA POTS RCM6 REYK SANT STJO THU1
   TSKB USNO USUD VILL WES2 WHIT WTZR YAR1 YELL ZECK
   ZWEN         

34 FIDUCIAL STATIONS:
   ALGO BRMU DAV1 DRAO FAIR FORT GUAM HOB2 IRKT KERG
   KIT3 KOKB KOSG KOUR KWJ1 LHAS MAC1 MALI MATE MDO1
   NLIB OHIG ONSA POTS SANT THU1 TIDB TSKB VILL WES2
   WTZR YAR1 YELL ZWEN      

AVERAGE COORDINATE RMS USING ITRF96:

             51    GLOBAL  STATIONS         34   FIDUCIAL   STATIONS
        MIT-JPL   MIT-NCL   JPL-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        0.7       1.4       1.3        5.3        5.4        5.7 
Lon        1.4       2.1       1.9        6.5        7.2        7.5 
Hgt        2.6       4.9       4.0        8.8        8.9        9.5 
3D         3.0       5.5       4.6       12.2       12.7       13.4

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

        58    GLOBAL  STATIONS         34   FIDUCIAL   STATIONS
   JPL-NCL   MIT-JPL   MIT-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.285     0.341     0.664      2.992      3.191      2.517

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      -8.1     3.0    23.5     3.0   -28.1     4.8        -0.7      0.1
MIT     -10.0     2.2    10.7     2.3   -27.3     3.5        -0.9      0.1
NCL      -7.2     3.8    38.4     4.2   -11.7     5.9        -0.2      0.2

REMARKS:

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0957g.snx :
   Stations: BRAZ HART MASP

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0957g.snx :
   Stations: BRAZ

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0957g.snx :
   Stations: BRAZ GODE GOLD GRAZ HART MADR MASP PERT PIE1 SHAO TROM

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       
    40451S003 USNO A        USNO A
    40405S031 GOL2 A GOL2 A       
              GOLD A GOLD A       
              GOL1 A              
    30302M007 HARK A        HARK A
              HART A              
              HAR1 A              
    30302M004 HRAO A              
    13407S012 MAD2 A MADR A       
              MADR A              
    31303M002 MAS1 A              
              MASP A              
    31303M001        MAS1 A       
    12309M002 MDVO 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       
    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  BAKO A  NTUS 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  HRAO A  SOFI A
  NOTO A  MEDI A  HFLK A  OBER A  CAGL A  WSRT A  TOUL A  EBRE A

IERS DOMES NO    COD    NRC    GFZ    IGS    NOA    SIO
============= ====== ====== ====== ====== ====== ======
    40499S020 RICH A RCM6 A RCM6 A        RCM6 A       
    42202M005 AREQ A AREQ B AREQ A        AREQ B AREQ A
    31303M002 MASP A MASP B MAS1 A        MASP B       
    31303M001                                    MASP A
    12309M002 MDVO A               MDVO A              
    12309M001                                    MDVO A
    10317M003 NYAL A        NYA1 A NYA1 A              
    10317M001        NYAL A               NYAL A NYAL A
    12353M001 YAKZ A               YAKA A              
                                   YAKZ A              
    40405S031 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
    50103M108 TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
    50107M004 YAR1 A YAR1 A YAR2 A YAR1 A YAR1 A YAR1 A
    30302M004 HRAO A               HRAO A              
    30302M007 HART A HART B HARK A HARK A HART B       
    30302M002        HART B                            
    10302M006 TROM A        TRO1 A                     
    10302M003                             TROM A TROM A
    42005M001 GALA A        GALA A GALA A GALA B       
    22601M001               NTUS A NTUS A              
    22601M002                             NTUS A       
    13407S012                      MAD2 A MADR A MADR A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH A  RIOG 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  NTUS 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  HRAO A  SOFI 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]>]