Subject: [IGSREPORT-4845] Wk 0949 G-SINEX Comparisons
From: AC Coordinator / NRCan GSDivision
Date: Thu, 30 Apr 1998 12:51:44 PDT

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IGS Electronic Report    Thu Apr 30 12:51:44 PDT 1998      Message Number 4845
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Author: AC Coordinator / NRCan GSDivision
Subject: Wk 0949 G-SINEX Comparisons

Subject: Wk 0949 G-SINEX Comparisons

Comparison of GNAAC Combined SINEX Solutions - Week 0949   
(MAR 15, 1998 - MAR 21, 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:
   mit0949g.snx at cddis.gsfc.nasa.gov
   jpl0949g.snx at cddis.gsfc.nasa.gov
   ncl0949g.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))

jpl0949g.snx: BISH    .075   .002  -.001   .069  -.001   .002   .046   .000   .000
mit0949g.snx: BISH    .078   .000  -.003   .074  -.003  -.001   .046   .000   .000
   - Unresolvable (no log file)

jpl0949g.snx: CAGL    .110   .000   .000   .128   .000   .000   .000   .000   .000
mit0949g.snx: CAGL    .110   .000   .000   .128   .000   .000   .010   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.045 M.

jpl0949g.snx: ELAT    .069   .000   .000   .068   .000   .000  -.011   .000   .000
mit0949g.snx: ELAT    .078   .000  -.003   .074  -.003  -.001  -.011   .000   .000
   - Unresolvable (no log file)

jpl0949g.snx: GALA    .110   .000   .000   .128   .000   .000   .000   .000   .000
mit0949g.snx: GALA    .110   .000   .000   .128   .000   .000   .083   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.081 M.

jpl0949g.snx: KATZ    .069   .000   .000   .068   .000   .000  -.012   .000   .000
mit0949g.snx: KATZ    .078   .000  -.003   .074  -.003  -.001  -.012   .000   .000
   - Unresolvable (no log file)

jpl0949g.snx: KOUR    .078   .000   .000   .096   .000   .000   .132   .000   .000
mit0949g.snx: KOUR    .078   .000   .000   .096   .000   .000  -.009   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.045 M.

jpl0949g.snx: MALI    .078   .000   .000   .096   .000   .000   .222   .000   .000
mit0949g.snx: MALI    .078   .000   .000   .096   .000   .000   .167   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.135 M.

jpl0949g.snx: MOIN    .110   .000   .000   .128   .000   .000   .994   .000   .000
mit0949g.snx: MOIN    .110   .000   .000   .128   .000   .000   .274   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.086 M.

jpl0949g.snx: NOUM    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
mit0949g.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.

jpl0949g.snx: TELA    .069   .000   .000   .068   .000   .000   .000   .000   .000
mit0949g.snx: TELA    .078   .000  -.003   .074  -.003  -.001   .000   .000   .000
   - Unresolvable (no log file)

jpl0949g.snx: TROM    .078   .000   .000   .096   .000   .000  2.473   .000   .000
mit0949g.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.

jpl0949g.snx: WSRT    .110   .000   .000   .128   .000   .000   .380   .000   .000
mit0949g.snx: WSRT    .110   .000   .000   .128   .000   .000   .380   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.389 M.

jpl0949g.snx: YAR1    .078   .000   .000   .096   .000   .000   .073   .000   .000
mit0949g.snx: YAR1    .078   .000   .000   .096   .000   .000   .114   .000   .000
   - Both wrong. Should be L1/L2 offset .110, .128 M., eccentricity 0.081 M.

jpl0949g.snx: HARK    .110   .000   .000   .128   .000   .000  9.754   .000   .000
jpl0949g.snx: HOFN    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0949g.snx: HRAO    .110   .000   .000   .128   .000   .000  9.754   .000   .000
jpl0949g.snx: LPGS    .110   .000   .000   .128   .000   .000   .000   .000   .000
ncl0949g.snx: MDVO    Antenna information missing               .146   .000   .000
jpl0949g.snx: NICO    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0949g.snx: SELE    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0949g.snx: SFER    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0949g.snx: SOFI    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0949g.snx: WUHN    .110   .000   .000   .128   .000   .000  2.320   .000   .000
jpl0949g.snx: ZECK    .110   .000   .000   .128   .000   .000   .000   .000   .000
jpl0949g.snx: ZIMM    .069   .000   .000   .068   .000   .000   .000   .000   .000

FILE ncl0949g.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 DAV1 MIT-JPL   Lat CAS1 MIT-JPL
   Lat KERG MIT-NCL   Lon EISL MIT-JPL   Lon AREQ MIT-JPL
   Lon TAEJ MIT-JPL   Lon GRAZ MIT-JPL   Lon KIRU MIT-JPL
   Lon KIRU MIT-NCL   Lon ANKR MIT-NCL   Hgt HOB2 MIT-JPL
   Hgt TAHI MIT-NCL   Hgt IISC MIT-NCL   Hgt HOB2 MIT-NCL

58 GLOBAL STATIONS:
   ALBH ALGO ASC1 AUCK BAHR BOGT BRMU BRUS CHAT COCO
   CRO1 DGAR DRAO FAIR FLIN FORT GODE GOLD GUAM IRKT
   KELY KIT3 KOKB KOSG KSTU KWJ1 LHAS MAC1 MADR MAG0
   MATE MCM4 MDO1 METS MKEA NLIB NRC1 OHIG ONSA PERT
   PIE1 POTS RCM6 REYK SANT SHAO STJO TIDB TROM TSKB
   USNO USUD WES2 WHIT WTZR 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 TROM TSKB WES2 WTZR YAR1 YELL ZWEN  

AVERAGE COORDINATE RMS USING ITRF96:

             58    GLOBAL  STATIONS         38   FIDUCIAL   STATIONS
        MIT-JPL   MIT-NCL   JPL-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
           (mm)      (mm)      (mm)       (mm)       (mm)       (mm)
        -------   -------   ------- ---------- ---------- ----------
Lat        1.7       1.5       0.5        4.3        5.1        4.8 
Lon        2.3       2.2       0.6        5.1        5.3        5.3 
Hgt        3.2       3.2       1.4       10.6       10.0        9.7 
3D         4.3       4.1       1.6       12.5       12.4       12.1

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

        58    GLOBAL  STATIONS         38   FIDUCIAL   STATIONS
   JPL-NCL   MIT-JPL   MIT-NCL MIT-ITRF96 JPL-ITRF96 NCL-ITRF96
   -------   -------   ------- ---------- ---------- ----------
     0.103     0.727     0.830      3.297      4.123      2.742

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      -5.8     2.7    17.6     2.8   -23.2     4.8        -1.2      0.1
MIT      -9.2     1.9    -1.4     1.9   -27.2     2.8        -1.0      0.1
NCL      -5.1     2.9    17.4     3.1   -13.5     5.1        -1.0      0.2

REMARKS:

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM mit0949g.snx :
   Stations: BRAZ HART MASP THU1 VILL

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM jpl0949g.snx :
   Stations: BRAZ THU1 VILL

THE FOLLOWING ITRF96 FIDUCIAL STATIONS ARE MISSING FROM ncl0949g.snx :
   Stations: BRAZ 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 GOLD A GOLD A
              GOL1 A GOL2 A       
              GOLD A              
    30302M002 HART A HARK A       
              HARK A              
              HAR1 A              
              HRAO A              
    30302M004        HRAO A       
    30302M007               HARK A
    22306M001 IISC A IISC A       
    22306M002               IISC A
    13407S012 MADR A MAD2 A MADR A
              MAD2 A MADR A       
    31303M002 MAS1 A              
    31303M001 MASP A MAS1 A       
    12309M002 MDVO A        MDVO A
    12309M001        MDVO A       
    40499S018 RICH A              
    40499S020        RICH A RCM6 A
    50103M108 TIDB A TIDB A TIDB A
              TID2 A TID2 A       
    21729S007 USUD A USUD A USUD A
              USUX 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  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  GALA 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  TOUL 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  ASC1 A  HOFN A  LPGS A  SCH2 A  RIOG A  SOL1 A  USNA A  USNO A  AOML A
  RCM6 A  MOIN A  GALA A  CHUR A  DUBO A  FLIN A  PRDS A  CASA 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  XIAN A  COCO A  KSTU A  SELE A  BISH A  DGAR A  BAHR 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
  TOUL A

IERS DOMES NO    COD    NRC    ESA    GFZ    JPL    NOA    SIO
============= ====== ====== ====== ====== ====== ====== ======
    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 MAS1 A MASP B       
    31303M001                                           MASP A
    12309M002 MDVO A                      MDVO A              
    12309M001                                           MDVO A
    42202M005 AREQ A AREQ B AREQ B AREQ A AREQ A AREQ B AREQ A
    40451M123 GODE A        GODE A        GODE A GODE A GODE A
    40451S003 USNO A USNO A USNO A                            
    40405S031 GOLD A GOLD A GOLD A GOL2 A GOL2 A GOLD B GOLD A
    40499S020 RICH A RCM6 A        RCM6 A        RCM6 A       
    50103M108 TIDB A TIDB A TIDB A TID2 A TID2 A TIDB A TIDB A
    22306M002 IISC A               IISC A        IISC A       
    22306M001                             IISC A        IISC 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  FLIN A  KWJ1 A  MAG0 A  MKEA A  MOIN A
  NOTO A  NICO A  GALA A  RCM6 A  USNO A
 
MISSING IERS DOMES NOS AT NOA:
-----------------------------
  MKEA A  GALA 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  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  USUX A
  YAKA A  YAKZ A  WUHN A  XIAN 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  TOUL A

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

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