Subject: [IGSREPORT-3889] Wk 0908 EUREF Analysis Report
From: T.A. Springer
Date: Tue, 1 Jul 1997 1:13:41 PDT

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IGS Electronic Report    Tue Jul  1  1:13:41 PDT 1997      Message Number 3889
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Author: T.A. Springer
Subject: Wk 0908 EUREF Analysis Report

 *******************************************************************************
 EUREF REPORT FOR GPS WEEK 0908 (DAYS 152-158, DATES 01-06-97 - 07-06-97)
 *******************************************************************************
 Report of the combination of the European weekly GPS solutions

 International Association of Geodesy
 Commission X - Global and Regional Geodetic Networks
 Subcommission for Europe (EUREF)

 Contributing Solutions:
 -----------------------
 Group Description                                         Contribution

 ASI - Nuova Telespazio S.p.A., Space Geodesy Center          SINEX
 BEK - International Commission for Global Geodesy of         SINEX
       the Bavarian Academy of Sciences (BEK)
 COE - European solution created at CODE                      SINEX
       (Center for Orbit Determination in Europe)
 GOP - Geodetic Observatory Pecny, Czech Republic             SINEX
 IFG - Institute for Applied Geodesy in Germany (IfAG)        SINEX
 LPT - Bundesamt fuer Landestopographie (L+T), Switzerland    SINEX
 NKG - Nordic Geodetic Commision (NKG)                        SINEX
 OLG - Observatory Lustbuehel Graz (OLG)                      SINEX
 ROB - Royal Observatory of Belgium (ROB)                     SINEX
 WUT - Warsaw University of Technology (WUT)                  SINEX
 
 SINEX: Software independent exchange format Version 0.05 or 1.00

 Submitted by: Center for Orbit Determination in Europe (CODE)
               Astronomical Institute, University of Berne, Switzerland

 Contact     : T.A. Springer ([email-masked])
 
 Products available through anonymous ftp using:
            A) ftp ubeclu.unibe.ch  -or-  ftp 130.92.6.11
               after login: cd aiub$ftp; cd euref
            B) ftp igs.ifag.de      -or-  ftp 141.74.240.26
               after login: cd pub/EUREF/CLUSTERS/wwww  (GPS week wwww)
            C) ftp ftpserver.oma.be -or-  ftp 193.190.249.203
               after login: cd pub/astro/euref/product/combin

 Processing Strategy:
 --------------------

 - The combined weekly EUREF solution (EUR) is created after removing the 
   Analysis Center specific constraints.
 - Covariance rescaling factors are derived from the sampling rate used by
   each center. In fact all solutions contribute to the combined solution 
   with the same weight.
   For ASI we use a rescaling factor which is a compromise between the
   estimated formal rms of the vertical components and the horizontal
   components. In comparison to the other solutions we find larger horizontal
   formal rms values (probably no ambiguity resolution) but smaller vertical
   rms values (probably lower elevation cut-off).
   Starting with week 0897 the rescaling of all centers is changed to give 
   the resulting EUREF solution a more realistic formal errors.
 - We use the ITRF93 coordinates (up to GPS week 0859) respectively
   the ITRF94 coordinates (since GPS week 0860) of the sites BRUS, KOSG, TROM,
   MATE, WTZR, GRAZ and ZIMM to align the solutions with the terrestrial 
   reference frame. Starting with week 0897 METS and VILL were added to 
   define the reference frame.
 - The comparisons between each individual solution and the combined solution
   is done using a 7-parameter Helmert transformation. The Helmert parameters
   are determined using all sites of the individual solutions.
 - In the first Table unweighted rms values (for the coordinate components in 
   the local system North-East-Up), derived from the Helmert residuals, are 
   shown for each site.
 - In the second table an (unweighted) rms is computed for each Analysis Center.
   These values are derived from the Helmert residuals of all sites of a
   particular Analysis Center. 

 AVAILABLE FILES:
 -----------------------------------------------------------------------------
 EUR09087.SUM           THIS TEXT FILE
 EUR09087.SNX           COMBINED EUROPEAN SOLUTION FOR GPS WEEK 0908
 -----------------------------------------------------------------------------
 
 REMARKS: Station MADR removed from all solutions in which it occured.
          MADR has been behaving very anomolous since the start of 1997.

 COMBINATION GPSWEEK 0908, EUROPE                       
 -------------------------------------------------------------------------------
 PROCESSED FILES         :    10
 TOTAL NUMBER OF STATIONS:    56
 -------------------------------------------------------------------------------
                                                                                
                      0000000001  RESIDUAL RMS IN MM                            
 STATION       #FILES 1234567890     N     E     U                              
 -------------------------------------------------------------------------------

 CAGL 12725M003     3 MMM          1.2   1.2   2.1
 MATE 12734M008     5 NNN N    N   1.5   1.2   5.1
 MEDI 12711M003     4 MMM    M     0.9   1.3   3.7
 NOTO 12717M003     3 MMM          1.5   1.4   3.1
 VENE 12741M001     3 MM     M     2.3   3.0   6.6
 WTZR 14201M010     9 N NNNNNNNN   0.9   0.9   1.9
 ANKR 20805M002     3  MM M        3.4   1.0   8.1
 GRAS 10002M006     4  MM  M  M    0.9   0.6   5.5
 EBRE 13410M001     2  MM          1.2   1.8   6.3
 MASP 31303M002     2  MM          2.5   3.8   5.8
 SFER 13402M004     2  MM          1.3   0.5   4.8
 UPAD 12750M002     5  MM  MMM     0.7   0.8   2.5
 VILL 13406M001     2  NN          1.7   1.8  21.9
 ZIMM 14001M004     5  NN  N NN    0.5   1.1   2.4
 BOR1 12205M002     3   M    M M   0.5   0.5   0.5
 KOSG 13504M003     6   N NNN NN   0.7   0.6   3.0
 METS 10503S011     5   NNN N  N   1.2   1.6   9.9
 BRUS 13101M004     4   N N N N    0.7   0.6   2.7
 GOPE 11502M002     4   MM   M M   0.2   0.3   1.4
 GRAZ 11001M002     5   NNNN N     1.0   0.3   4.1
 HFLK 11006S003     3   M    M M   0.6   0.5   0.5
 HERS 13212M007     4   M M M M    0.4   1.4   8.9
 JOZE 12204M001     5   MM  MM M   0.7   1.5   7.9
 POTS 14106M003     5   M M MMM    0.3   0.8   2.6
 KIRU 10403M002     2   M M        4.6   1.0   1.0
 KELY 43005M001     2   M   M      3.6   2.7   8.9
 THU1 43001M001     2   M   M      3.4   0.6   3.5
 ONSA 10402M004     5   MMM M  M   0.5   0.9   6.8
 REYK 10202M001     3   M M M      2.0   2.9   9.3
 LAMA 12209M001     3   M    M M   1.1   0.7   0.4
 MDVO 12309M002     3   MM     M   2.1   1.4   7.4
 PENC 11206M006     3   M    M M   0.6   0.5   1.1
 BOGO 12207M002     4   MM   M M   0.6   1.2   3.7
 ZWEN 12330M001     3   MMM        1.2   0.9   2.7
 NYAL 10317M001     2   M   M      2.2   1.3   4.9
 MOPI 11507M001     3    M   M M   0.3   0.5   4.3
 OBER 14208M001     2    M   M     0.9   1.0   7.7
 WROC 12217M001     3     M  M M   0.5   0.7   6.8
 STAV 10330M001     1       M        -     -     -
 VIS0 10423M001     1       M        -     -     -
 JOEN 10512M001     1       M        -     -     -
 VIL0 10424M001     1       M        -     -     -
 KIR0 10422M001     1       M        -     -     -
 MAR6 10405M002     1       M        -     -     -
 VARD 10322M002     1       M        -     -     -
 OSLO 10307M001     1       M        -     -     -
 TRON 10331M001     1       M        -     -     -
 RIGA 12302M002     1       M        -     -     -
 SODA 10513M001     1       M        -     -     -
 VAAS 10511M001     1       M        -     -     -
 SVTL 12350M001     1       M        -     -     -
 PFAN 11005S002     1        M       -     -     -
 DELF 13502M004     1         M      -     -     -
 DENT 13112M001     1         M      -     -     -
 DOUR 13113M001     1         M      -     -     -
 WARE 13114M001     1         M      -     -     -
 -------------------------------------------------------------------------------

 FLAGS:    M: MEAN, F: FIXED, N: FREE NETWORK RESTRICTIONS

1

 -------------------------------------------------------------------------------
 UNWEIGHTED RMS VALUES WITH RESPECT TO THE COMBINED SOLUTION IN MM
 -------------------------------------------------------------------------------
 PROCESSED FILES         :    10
 TOTAL NUMBER OF STATIONS:    56
 -------------------------------------------------------------------------------

 FILE  GRP    #SITES   COV.COMP. COMPONENT      RMS
 ---------------------------------------------------
                                     N          1.5
    1  ASI         6     0.0080      E          2.5
                                     U          3.6
 ---------------------------------------------------
                                     N          1.7
    2  BEK        13     0.0200      E          1.6
                                     U          7.6
 ---------------------------------------------------
                                     N          1.4
    3  COE        34     0.0200      E          0.9
                                     U          3.7
 ---------------------------------------------------
                                     N          0.4
    4  GOP        11     0.0200      E          1.0
                                     U          6.0
 ---------------------------------------------------
                                     N          1.7
    5  IFG        14     0.0200      E          1.3
                                     U          6.5
 ---------------------------------------------------
                                     N          0.5
    6  LPT         6     0.0200      E          0.3
                                     U          1.4
 ---------------------------------------------------
                                     N          0.9
    7  NKG        26     0.0200      E          0.9
                                     U          5.5
 ---------------------------------------------------
                                     N          0.5
    8  OLG        18     0.0200      E          0.4
                                     U          2.3
 ---------------------------------------------------
                                     N          0.3
    9  ROB        11     0.0200      E          0.4
                                     U          0.8
 ---------------------------------------------------
                                     N          0.5
   10  WUT        15     0.0200      E          0.7
                                     U          2.9
 ---------------------------------------------------
                                     N          1.1
       MEAN       56                 E          1.0
                                     U          4.5

[Mailed From: Brockmann Elmar <[email-masked]>]