Subject: [IGEXMail-0122]
From: Heinz Habrich <[email-masked]>
Date: 17 Dec 1998 17:24:23

******************************************************************************
IGEX Electronic Mail    17-Dec-1998 17:24:23                   Message No 0122
******************************************************************************

Author: Heinz Habrich <[email-masked]>
Subject: 

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BKG IGEX ANALYSIS REPORT                  GPS WEEK 0980 (DAYS 291 - 297, 1998)
******************************************************************************
                                                                              
Submitted by:    Bundesamt fuer Kartographie und Geodaesie (BKG)              
                 Richard-Strauss-Allee 11, D-60598 Frankfurt Main, Germany    
                         Phone : +49-69-63331                                 
                         Fax   : +49-69-6333425                               
                         E-Mail: [email-masked]                              
                                                                              
Product access:  anonymous ftp to igs.ifag.de (141.74.240.26)                 
                 subdirectory IGEX/products/wwww                              
                                                                              
------------------------------------------------------------------------------
PROCESSING SCHEME:                                                            
------------------------------------------------------------------------------
SOFTWARE:                                                                     
    Bernese GPS Software                                                      
                                                                              
ORBIT COMPUTATION:                                                            
    Double difference phase observations of GLONASS and GPS satellites are    
    processed in ionosphere free linear combination.                          
                                                                              
    IGS orbits and Earth rotation parameters are fixed.                       
                                                                              
    Six initial conditions and nine radiation preassure parameters per        
    satellite are determined for GLONASS satellites.                          
                                                                              
    The middle day of a 3-day-arc is used for the daily orbit results.        
                                                                              
    The daily orbit files include GPS satellite clock values from IGS         
    estimates and broadcasted values for GLONASS satellite clocks.            
                                                                              
    The station Zimmerwald in Switzerland (ZIMZ) is constrained to the        
    ITRF96 coordinates.                                                       
                                                                              
GLONASS/GPS TIME OFFSET:                                                      
    Code observations of combined GLONASS/GPS receivers are used to           
    determine the GLONASS/GPS time offset.                                    
                                                                              
    This offset includes the modulo 1 sec system time scale difference of     
    GLONASS and GPS and an additional offset between the receiver's           
    'GPS clock' and 'GLONASS clock'. The additional offset is receiver        
    dependent.                                                                
                                                                              
TRANSFORMATION PARAMETERS BETWEEN ITRF AND PZ90:                              
    The transformation parameters are derived from GLONASS precise orbits     
    (given in ITRF) and GLONASS broadcast orbits (given in PZ90).             
------------------------------------------------------------------------------

                                                                              
------------------------------------------------------------------------------
ORBIT REPEATABILITY, DAILY SOLUTIONS COMPARED TO 7-DAY-ARC:                   
------------------------------------------------------------------------------
     GLONASS Satellites:                                                      
     103 104 106 109 110 111 112 113 115 116 117 118 120 122 
------------------------------------------------------------------------------
 291  18  23  17  23  46  18  29  18  31  22  29  16  21  17
 292   8  29  33   9  84  12  34  15  26  32  41  10  10  15
 293  23  26  24  22  49  13  23  12  22  19  21  20   8  11
 294  24  14  34  16  40  31  14   9  28  30  21  29  24  16
 295   9  18  56  17  38  28  44  13  18  45  26   8  19  11
 296  21  20  33  26  58  18  41  16  14  28  21   9  30  20
 297  41  12  36  60  21  61  42  30  25  49  46  14  35  51
------------------------------------------------------------------------------
 ALL  23  21  35  29  51  30  34  17  24  34  31  17  23  24
------------------------------------------------------------------------------

                                                                              
------------------------------------------------------------------------------
GLONASS/GPS TIME OFFSET:                                                      
------------------------------------------------------------------------------
         OFFSET    (NS)                                                       
         RMS ERROR (NS)                                                       
DAY    :       291       292       293       294       295       296       297
STATION                                                                       
------------------------------------------------------------------------------
BORG      1033.951  1039.799  1036.761  1042.647  1039.087  1049.298  1052.580
              .808      .875      .851      .987      .952      .864      .829
BRUG       983.018   989.582   980.350  1018.729  1052.169  1054.778          
              .843      .919      .890     1.025      .926      .988          
GATR                  88.248    10.077   102.499    76.494    74.216          
                       2.857     3.216     5.888     2.537     1.770          
GODZ        82.526    95.363    79.653    99.420    96.407    95.405   102.348
              .869      .913      .895     1.160      .849      .873      .843
IRKZ        84.535    89.536    88.574    89.133   112.275   113.015    99.681
              .809      .838      .861      .854      .905      .872      .827
KHAB        79.268    84.212    81.779    79.869   109.124   106.713    95.706
             1.170      .902      .887      .901      .922      .872      .822
KR0G        21.029    27.344    23.339    28.543    39.864    39.200    39.349
              .755      .813      .791      .885      .825      .792      .756
LDS1      -916.161            -910.097  -891.363  -879.796  -890.237  -896.376
             1.621               1.452     1.403     1.157     1.212     1.389
LRBA        84.740    90.027    83.368    86.309                              
              .788      .860      .834      .936                              
METZ        71.947    80.232    74.449    90.573    88.880    87.525    84.699
              .872     1.061      .805     1.545      .838      .803     1.281
MTKA        86.844                                                            
              .831                                                            
OS0G                                                99.054    92.250    95.495
                                                     1.040      .811      .778
REYZ       113.849   115.814   105.184   120.914   133.309   132.490   135.402
             1.281      .829      .809      .947      .804      .783      .751
SL1X                            61.362    82.334              79.574    87.233
                                  .887     1.138                .976      .870
VSLD      1032.717  1039.510  1032.080  1041.373  1044.140  1050.852  1049.041
              .836      .958      .895     1.037      .909      .971      .861
ZIMZ        67.622    73.262    65.545    78.041    97.078    81.632    81.855
              .830      .909      .884     1.030     1.373      .846      .812
------------------------------------------------------------------------------

                                                                              
------------------------------------------------------------------------------
STATISTICS FOR 1 DAY SOLUTIONS:                                               
------------------------------------------------------------------------------
                                                                              
DAY     OBSERVATIONS       PARAMETERS          RMS (M)                        
------------------------------------------------------------------------------
291            45562             1348            .0015                        
292            46263             1428            .0018                        
293            63103             1555            .0015                        
294            60519             1632            .0016                        
295            56989             1532            .0015                        
296            67182             2101            .0015                        
297            55525             1382            .0014                        
------------------------------------------------------------------------------

                                                                              
------------------------------------------------------------------------------
COORDINATE COMPARISON FOR 1 DAY SOLUTIONS:                       GPS WEEK 0980
------------------------------------------------------------------------------
TOTAL NUMBER OF STATIONS:    16
------------------------------------------------------------------------------
                      WEEKDAY  RESIDUAL RMS IN MM
STATION        #DAYS  0123456     N     E     U
------------------------------------------------------------------------------
BORG               6   PPPPPP     6    11    27
BRUG               6  PPPPPP      5     7    14
GATR               5   PPPPP      6     9    22
GODZ               7  PPPPPPP     6    16    12
IRKZ               7  PPPPPPP    10    13    13
KHAB               7  PPPPPPP    13    10     4
KR0G               7  PPPPPPP     8     8    11
LDS1               6  P PPPPP     8     6    26
METZ               7  PPPPPPP     6     5    11
MTKA               1  P           -     -     -
OS0G               3      PPP     4     3     8
REYZ               7  PPPPPPP     5     9     7
SL1X               2    PP        4    12     8
VSLD               1       P      -     -     -
WTZG               4  PP P P     24    21    30
ZIMZ               7  PPPPPPP     1     2     1
------------------------------------------------------------------------------

                                                                              
------------------------------------------------------------------------------
STATISTICS FOR 3 DAY SOLUTIONS:                                               
------------------------------------------------------------------------------
                                                                              
MID-DAY OBSERVATIONS       PARAMETERS          RMS (M)                        
------------------------------------------------------------------------------
291           122242             3287            .0017                        
292           154928             3656            .0017                        
293           169885             3915            .0017                        
294           180611             4010            .0016                        
295           184690             4446            .0016                        
296           179696             4260            .0016                        
297           157310             3754            .0021                        
------------------------------------------------------------------------------

                                                                              
------------------------------------------------------------------------------
TRANSFORMATION PARAMETERS BETWEEN ITRF AND PZ90:                              
------------------------------------------------------------------------------
USAGE:                                                                        
                                                                              
   | X |     [           ]   [ | X |   | DX |   |   1  RZ -RY |   | X | ]     
   | Y |  =  [ 1 + SCALE ] * [ | Y | + | DY | + | -RZ   1  RX | * | Y | ]     
   | Z |     [           ]   [ | Z |   | DZ |   |  RY -RX   1 |   | Z | ]     
    ITRF                        PZ90                               PZ90       
                                                                              
------------------------------------------------------------------------------
                                          RMS = RMS of transformed coordinates
    DX     DY     DZ       RX      RY      RZ   SCALE   RMS 
    [m]    [m]    [m]    [mas]   [mas]   [mas]  [10E6]  [m]    DAY            
------------------------------------------------------------------------------
  -.033   .081  -.138   24.67  -33.76 -386.88    .0161  4.06   291
  -.658   .835   .767   18.17  -49.02 -382.34    .0084  4.09   292
  -.565   .294  -.215   28.84  -41.38 -391.28    .0163  2.99   293
  -.201   .231 -1.218   28.07  -37.78 -385.35    .0221  2.72   294
  -.621   .580 -1.179   21.54  -44.42 -389.89    .0254  2.98   295
  -.052  -.011  -.749   25.56  -33.68 -402.06    .0123  3.83   296
   .428   .068  -.775   29.07  -29.89 -413.25    .0088  4.93   297
------------------------------------------------------------------------------