Subject: [IGSREPORT-5012] Wk 0954 G-SINEX Comparisons
From: AC Coordinator / NRCan GSDivision
Date: Tue, 16 Jun 1998 9:41:15 PDT

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IGS Electronic Report    Tue Jun 16  9:41:15 PDT 1998      Message Number 5012
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0954 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0954   
(APR 19, 1998 - APR 25, 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:
   mit0954g.snx at cddis.gsfc.nasa.gov
   jpl0954g.snx at cddis.gsfc.nasa.gov
   ncl0954g.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))

jpl0954g.snx: BISH    .075   .002  -.001   .069  -.001   .002   .046   .000   .000
mit0954g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
   - Unresolvable (no log file)

jpl0954g.snx: ELAT    .069   .000   .000   .068   .000   .000  -.011   .000   .000
mit0954g.snx: ELAT    .078   .000  -.003   .074  -.003  -.001  -.011   .000   .000
   - Unresolvable (no log file)

jpl0954g.snx: HARK    .110   .000   .000   .128   .000   .000  9.754   .000   .000
jpl0954g.snx: HART    .110   .000   .000   .128   .000   .000  9.754   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 9.803 M.

jpl0954g.snx: HRAO    .110   .000   .000   .128   .000   .000  9.754   .000   .000
ncl0954g.snx: HRAO    .110   .000   .000   .128   .000   .000   .000   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity .081 M.

jpl0954g.snx: INEG    .092  -.001   .000   .060   .000  -.001   .130   .000   .000
mit0954g.snx: INEG    .080   .000   .001   .079  -.001   .001   .130   .000   .000
   - Unresolvable (no log file)

jpl0954g.snx: KATZ    .069   .000   .000   .068   .000   .000  -.012   .000   .000
mit0954g.snx: KATZ    .078   .000  -.003   .074  -.003  -.001  -.012   .000   .000
   - Unresolvable (no log file)

jpl0954g.snx: MALI    .078   .000   .000   .096   .000   .000   .222   .000   .000
mit0954g.snx: MALI    .110   .000   .000   .128   .000   .000   .170   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity .135 M.

jpl0954g.snx: MDVO    .078   .000  -.003   .074  -.003  -.001   .146   .000   .000
mit0954g.snx: MDVO    .078   .000  -.003   .074  -.003  -.001   .146   .000   .000
ncl0954g.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.

jpl0954g.snx: NOUM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
mit0954g.snx: NOUM    .075   .002  -.001   .069  -.001   .002  -.002  -.005   .006
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.000 M.

jpl0954g.snx: NYA1    .078   .000   .000   .096   .000   .000  5.216   .000   .000
mit0954g.snx: NYA1    .110   .000   .000   .128   .000   .000   .033   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.000 M.

jpl0954g.snx: TELA    .069   .000   .000   .068   .000   .000   .000   .000   .000
mit0954g.snx: TELA    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable (no log file)

jpl0954g.snx: CAGL    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0954g.snx: EBRE    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
jpl0954g.snx: GALA    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0954g.snx: HOFN    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0954g.snx: HOLB    .078   .000   .000   .096   .000   .000   .129   .000   .000
mit0954g.snx: KOSG    .078   .000   .000   .096   .000   .000   .116   .000   .000
jpl0954g.snx: KOUR    .078   .000   .000   .096   .000   .000   .132   .000   .000
jpl0954g.snx: LPGS    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0954g.snx: MEDI    .110   .000   .000   .128   .000   .000   .146   .000   .000
jpl0954g.snx: NICO    .110   .000   .000   .128   .000   .000   .000   .000   .000
mit0954g.snx: NYAL    .078   .000   .000   .096   .000   .000  5.216   .004   .001
jpl0954g.snx: SELE    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0954g.snx: SFER    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0954g.snx: SOFI    .110   .000   .000   .128   .000   .000   .000   .000   .000
mit0954g.snx: THU1    .110   .000   .000   .128   .000   .000   .035   .000   .000
jpl0954g.snx: TRO1    .078   .000   .000   .096   .000   .000  2.473   .000   .000
jpl0954g.snx: UPAD    .078   .000  -.003   .074  -.003  -.001  1.962   .000   .000
jpl0954g.snx: WSRT    .110   .000   .000   .128   .000   .000   .380   .000   .000
jpl0954g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000
jpl0954g.snx: YAR1    .078   .000   .000   .096   .000   .000   .073   .000   .000
jpl0954g.snx: ZECK    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0954g.snx: ZIMM    .069   .000   .000   .068   .000   .000   .000   .000   .000

FILE ncl0954g.snx MISSING THE SITE/GPS_PHASE_CENTER BLOCK.
DEFAULTING TO KNOWN L1/L2 OFFSETS AND ECCENTRICITIES.

ANTENNA PHASE CENTRE CONFLICTS IN FILE mit0954g.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 EISL MIT-JPL   Lat BOGT MIT-JPL   Lat EISL MIT-NCL
   Lat BOGT MIT-NCL   Lat AREQ MIT-NCL   Lat RCM6 MIT-NCL
   Lon GUAM MIT-JPL   Lon BOGT MIT-JPL   Lon AREQ MIT-NCL
   Hgt COCO JPL-NCL   Hgt COCO MIT-JPL   Hgt COCO MIT-NCL

64 GLOBAL STATIONS:
   ALBH ALGO ANKR ASC1 AUCK BAHR BRMU CAS1 CHAT CRO1
   DAV1 DGAR DRAO FAIR FORT GODE GOLD GRAZ HOB2 IRKT
   KELY KERG KIRU KIT3 KOKB KOSG KSTU KWJ1 LHAS MAC1
   MADR MAG0 MATE MCM4 MDO1 METS MKEA NLIB NRC1 NTUS
   OHIG ONSA PERT PETR PIE1 POL2 POTS REYK SANT SHAO
   STJO TAEJ TIDB TSKB USNO USUD VILL WES2 WHIT WTZR
   XIAN YAR1 YELL ZWEN      

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

AVERAGE COORDINATE RMS USING ITRF96:

             64    GLOBAL  STATIONS         38   FIDUCIAL   STATIONS
        MIT-JPL   MIT-NCL   JPL-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        0.9       1.1       0.5        4.6        4.7        4.8 
Lon        1.4       1.5       0.8        6.7        6.6        6.3 
Hgt        2.2       3.0       1.5       10.8       10.3       10.2 
3D         2.7       3.5       1.8       13.5       13.1       12.9

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

        69    GLOBAL  STATIONS         38   FIDUCIAL   STATIONS
   JPL-NCL   MIT-JPL   MIT-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.053     0.256     0.235      3.520      4.319      2.491

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      -1.4     2.9    25.4     3.0   -18.1     4.7        -0.7      0.1
MIT      -4.8     2.0    15.0     2.1   -29.1     2.8        -0.9      0.1
NCL      -1.6     2.9    20.4     3.1   -10.8     4.2        -0.6      0.2

REMARKS:

TROM WAS NOT USED IN GLOBAL COMPARISON DUE TO LARGE COORDINATE DIFFERENCES
WITH ITRF96, DESCRIBED BELOW:

STATION / GNAAC / HEIGHT DIFFERENCE (mm.):
   TROM JPL -121.2
        MIT  -81.6

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0954g.snx :
   Stations: BRAZ MASP 

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0954g.snx :
   Stations: BRAZ 

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0954g.snx :
   Stations: BRAZ HART MASP 

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        HART B HARK A
    30302M004               HRAO A
    13407S012 MADR A MADR A MADR A
              MAD2 A              
    31303M002 MAS1 A              
    31303M001 MASP A MAS1 A       
    12309M002 MDVO A        MDVO A
    12309M001        MDVO A       
    10317M001 NYAL A NYAL A NYAL A
              NYA1 A              
    10317M003        NYA1 A       
    40499S018 RICH A              
    40499S020        RICH A RCM6 A
    50103M108 TIDB A TIDB A TIDB A
              TID2 A TID2 A       
    10302M003 TRO1 A              
    10302M006        TRO1 A       
    50107M004 YAR1 A YAR1 A YAR1 A
              YAR2 A              
    42005M001        GALA A GALA A
                     GALA B       
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  AOML A  ASC1 A  BAHR A  BAKO A  BISH A  CHUR A  COCO A  DGAR A  EBRE A  ELAT A
  FLIN A  HOLB A  INEG A  KATZ A  KWJ1 A  MAG0 A  MEDI A  MKEA A  NANO A  NOTO A
  NOUM A  NSSP A  PETR A  LPGS A  NICO A  GALA A  GAL1 A  SFER A  ZECK A  HOFN A
  CAGL A  PRDS A  RCM6 A  RIOG A  SELE A  SOFI A  SOL1 A  SCH2 A  SUWN A  TELA A
  TOUL A  UCLU A  URUM A  USNA A  USNO A  WHIT A  WSLR A  XIAN A  YAKA A  YAKZ 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
  YAKA A  YAKZ A  SUWN A  WUHN A  XIAN A  BAKO A  NTUS A  COCO A  KSTU A  URUM 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  OBER A  CAGL A  WSRT A  TOUL A  EBRE A

IERS DOMES NO    COD    NRC        GFZ    JPL    SIO
============= ====== ====== ====== ====== ====== ======
    50103M108 TIDB A TIDB A        TID2 A TID2 A TIDB A
    30302M004 HRAO A                                   
    30302M007 HART A HART B        HARK A              
    30302M002        HART B               HARK A       
                                          HRAO A       
    50107M004 YAR1 A YAR1 A        YAR2 A YAR1 A YAR1 A
    31303M002 MASP A MASP B        MAS1 A              
    31303M001                                    MASP A
    40405S031 GOLD A GOLD A        GOL2 A GOL2 A GOLD A
    40451S003 USNO A USNO A                            
    40451M123 GODE A                             GODE A
    40499S020 RICH A RCM6 A        RCM6 A              
    42202M005 AREQ A AREQ B        AREQ A        AREQ A
    12309M002 MDVO A                      MDVO A       
    12309M001                                    MDVO A
    10317M001        NYAL A        NYAL A NYAL A NYAL A
                                          NYA1 A       
    10317M003                      NYA1 A              
    10302M006                      TRO1 A              
    10302M003                                    TROM A
    13407S012                             MAD2 A MADR A
 
MISSING IERS DOMES NOS AT GFZ:
-----------------------------
  BISH A  URUM A  RIOG A
 
MISSING IERS DOMES NOS AT JPL:
-----------------------------
  ASC1 A  BAHR A  COCO A  DGAR A  KWJ1 A  MAG0 A  MKEA A  NOUM A  PETR A  GALA A
  SFER A  ZECK A  RCM6 A  XIAN A  YAKA 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  XIAN 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  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]>]