Subject: [IGSMAIL-60] Processing Center 040-GFZ
From: Ch. Reigber
Date: 5 AUG 1992 11:06:57

***********************************************************************
IGS Electronic Mail        5-AUG-1992 11:06:57       Message Number 60
***********************************************************************
 
From:    Ch. Reigber
Subject: Processing Center 040-GFZ
         -------------------------

Report for GPS Week 653 (Days 194-200) from GFZ
===============================================

This report is generated by the GeoForschungsZentrum Potsdam (GFZ) 
on a weekly basis for the International GPS Geodynamics Service (IGS). 

PRODUCT SUMMARY 

   GFZ06537.EPH:  GPS ephemerides for GPS Week 651 (SP3 format, pos. and vel.)
   GFZ06537.ERP:  Earth rotation parameter (UT1 corrections are not included)
   GFZ06537.CLK:  ST and SV clock parameters of each observation epoch (the
                  maser-based clock at Fairbanks is taken as reference clock)
   GFZ06537.SUM:  Summary file for reporting week 

The above specified products are available at CDDIS. The ERP results are 
submitted additional to IERS Central Bureau and IERS Sub Bureau for Rapid
Service and Predictions.

CORE STATION SUMMARY

The Core Station data used in the solutions is given below.  

                                      Day of Week 653
                                    S  M  T  W  T  F  S
                                    U  O  U  E  H  R  A
        Site                        N  N  E  D  U  I  T
Name            Code      
---------------------------------------------------------
Algonquin       ALGO                X  X  X  X  X  X  X
Fairbanks       FAIR                X  X  X  X  X  X  X
Goldstone       DS10                X  X  X  X  X  -  X
Hartebeesthoek  HART                X  X  X  X  X  X  X
Kokee Park      KOKR                X  X  X  X  X  X  X
Mc Murdo        MCMU                X  X  X  X  X  X  X
Ny-Alesund      NALL                X  X  X  -  -  X  X
Pamatai         PAMA                X  X  X  X  X  X  X
Santiago        SANT                X  X  X  X  X  X  X
Tai Shi         TAIW                -  X  X  X  X  X  X	
Tromsoe         TROM                X  X  X  X  X  X  X 
Usuda           USUD                X  X  X  X  -  -  -
Wettzell        WTZ1                X  X  X  X  X  X  X
Yellowknife     YELL                X  X  X  X  X  X  X
Yarragadee      YAR1                X  X  X  X  X  X  X
---------------------------------------------------------

SOLUTION CHARACTERISTICS

1. Analysis Center: GFZ/DLR
2. Analysing Team: D. Angermann, R. Galas, Th. Nischan,
                   Ch. Reigber, S.Y. Zhu 
3. Solution Identifier: EPH(GFZ)92G01-DDD
                        ERP(GFZ)92G01-DDD
                        CLK(GFZ)92G01-DDD (only relative)
4. Software used: GEPARD4.0
5. Defintion of Terrestrial Reference Frame
   Origin: Nominally ITRF-90
   Orientation: Nominally ITRF-90
   Reference Epoch: 1992.352 (MJD 48750)
   Fixed set of stations: Y. Bock Solution (IGS Message No.35)
   ALGO, YELL, FAIR, KOKR, TROM, WTZ1, YAR1, USUD, NALL
6. Data used:
   - undifferenced pseudo ranges and carrier phases
   - 2-day arc solutions with one day overlap
7. Adjusted parameters:
   - State vector of all GPS satellites
   - Daily polar motion
   - Coordinate corrections for non-fixed stations
   - Troposheric zenith path delay 
   - Solar radiation scale and y-bias 
   - Ambiguities
   - ST and SV clock parameters of each observation epoch (the 
     maser-based clock at Fairbanks is taken as reference clock)

SOLUTION STATISTICS

                         Arc No.      0     1     2     3     4     5     6    
   ------------------------------------------------------------------------
   Number of observations         41594 42524 37824 36868 34861 38051 37100 
   RMS of carrier phases [cm]       3.8   3.2   2.9   2.6   2.3   2.1   2.2
   RMS of code measurements [cm]   43.6  44.5  45.8  46.5  44.3  44.5  46.1
   ------------------------------------------------------------------------

INFORMATIONS TO PRODUCT GENERATION

  The calculation of the 7-day ephemerides file is described below.

            Day of GPS Week 653        [Day 0=Sunday; Day 6=Saturday]
  Arc No.   0   1   2   3   4   5   6    
       0     XXXX----
       1         XXXX----
       2             XXXX----
       3                 XXXX----
       4                     XXXX----
       5                         XXXX----
       6                             XXXX----

   XXXX : The first day of the 2-day arc is used for ephemeris
          dissemination
   ---- : The second day is used for quality control by overlap

   The pole coordinates are estimated for three epochs (beginning
   of each day) with the 2-day arc's. Using the above described 
   method (one day overlaps) there are three solutions for each
   pole parameter. The submitted ERP-results are the mean values
   of these different solutions.  

-  GFZ06537.EPH (Seven 1-day segments)
   ============

   In the table below the overlap rms differences [m] in radial,
   cross- and along-track component are presented.

 prn            194    195    196    197    198    199    200 |  Mean
======================================================================
   2 radial   0.241  0.195  0.346  0.336  0.308  0.362  0.223 |  0.287
   2 cross    0.246  0.344  0.233  0.500  0.235  0.596  0.387 |  0.363
   2 along    0.510  0.516  0.589  0.701  0.762  0.761  0.415 |  0.608
----------------------------------------------------------------------
   3 radial   0.260  0.148  0.277  0.219  0.282  0.139  0.175 |  0.214
   3 cross    0.198  0.399  0.376  0.348  0.414  0.333  0.267 |  0.334
   3 along    0.447  0.393  0.442  0.332  0.684  0.361  0.340 |  0.428
----------------------------------------------------------------------
  11 radial   0.157  0.187  0.239  0.108  0.214  0.250  0.260 |  0.202
  11 cross    0.321  0.401  0.501  0.186  0.323  0.323  0.461 |  0.359
  11 along    0.339  0.492  0.420  0.274  0.482  0.682  0.629 |  0.474
----------------------------------------------------------------------
  12 radial   0.220  0.262  0.247  0.328  0.281  0.327  0.393 |  0.294
  12 cross    0.239  0.601  0.207  0.330  0.730  0.357  0.251 |  0.388
  12 along    0.507  0.896  0.515  0.684  0.591  0.658  0.722 |  0.653
----------------------------------------------------------------------
  13 radial   0.166  0.187  0.230  0.230  0.168  0.190  0.143 |  0.188
  13 cross    0.337  0.196  0.321  0.324  0.298  0.164  0.161 |  0.257
  13 along    0.333  0.473  0.538  0.588  0.401  0.379  0.374 |  0.441
----------------------------------------------------------------------
  14 radial   0.407  0.370  0.370  0.433  0.359  0.341  0.274 |  0.365
  14 cross    0.417  0.599  0.519  0.498  0.379  0.600  0.460 |  0.496
  14 along    0.790  0.718  0.738  0.816  0.801  0.633  0.530 |  0.718
----------------------------------------------------------------------
  15 radial   0.339  0.332  0.400  0.400  0.452  0.329  0.300 |  0.365
  15 cross    0.237  0.443  0.614  0.487  0.329  0.438  0.208 |  0.394
  15 along    0.613  0.642  0.733  0.802  0.858  0.664  0.571 |  0.698
----------------------------------------------------------------------
  16 radial   0.213  0.188  0.218  0.294  0.365  0.430  0.269 |  0.282
  16 cross    0.605  0.626  0.409  0.356  0.391  0.628  0.410 |  0.489
  16 along    0.599  0.484  0.475  0.569  0.649  0.873  0.514 |  0.595
----------------------------------------------------------------------
  17 radial   0.419  0.326  0.395  0.341  0.355  0.325  0.319 |  0.354
  17 cross    0.449  0.268  0.441  0.378  0.395  0.244  0.422 |  0.371
  17 along    0.959  0.603  0.680  0.715  0.766  0.587  0.622 |  0.705
----------------------------------------------------------------------
  18 radial   0.161  0.194  0.162  0.219  0.245  0.282  0.141 |  0.201
  18 cross    0.349  0.438  0.393  0.335  0.362  0.274  0.283 |  0.348
  18 along    0.382  0.474  0.342  0.543  0.530  0.462  0.357 |  0.441
----------------------------------------------------------------------
  19 radial   0.296  0.286  0.259  0.423  0.406  0.390  0.369 |  0.347
  19 cross    0.289  0.655  0.336  0.950  0.419  0.696  0.263 |  0.515
  19 along    0.644  0.788  0.558  0.928  1.087  0.775  0.877 |  0.808
----------------------------------------------------------------------
  20 radial   0.381  0.286  0.390  0.238  0.303  0.420  0.231 |  0.321
  20 cross    0.402  0.284  0.212  0.444  0.569  0.283  0.311 |  0.358
  20 along    1.021  0.505  0.669  0.425  0.618  0.742  0.469 |  0.636
----------------------------------------------------------------------
  21 radial   0.247  0.262  0.353  0.226  0.188  0.179  0.170 |  0.232
  21 cross    0.415  0.411  0.305  0.171  0.270  0.470  0.347 |  0.341
  21 along    0.530  0.502  0.623  0.469  0.393  0.509  0.351 |  0.482
----------------------------------------------------------------------
  23 radial   0.120  0.185  0.201  0.143  0.154  0.100  0.122 |  0.146
  23 cross    0.273  0.265  0.141  0.169  0.265  0.217  0.277 |  0.230
  23 along    0.255  0.391  0.380  0.353  0.305  0.263  0.271 |  0.317
----------------------------------------------------------------------
  24 radial   0.398  0.339  0.551  0.466  0.454  0.450  0.359 |  0.431
  24 cross    0.290  0.452  0.355  0.338  0.412  0.454  0.420 |  0.389
  24 along    0.806  0.846  1.411  0.936  0.910  0.954  0.979 |  0.977
----------------------------------------------------------------------
  25 radial   0.340  0.273    *)     *)     *)     *)   0.248 |  0.287
  25 cross    0.475  0.542                              0.249 |  0.422
  25 along    0.704  0.481                              0.586 |  0.590
----------------------------------------------------------------------
  28 radial   0.431  0.236    *)   0.336  0.163    *)   0.375 |  0.308
  28 cross    0.406  0.557         0.687  0.426         0.458 |  0.507
  28 along    0.725  0.447         0.801  0.477         0.722 |  0.634
======================================================================

  *): overlap differences are not calculated

-  GFZ06537.ERP
   ============

   MJD    x    sigmax    y    sigmay

 48815 -.1300  .0006  0.3997  .0006  
 48816 -.1300  .0006  0.4033  .0007
 48817 -.1290  .0006  0.4054  .0006  
 48818 -.1277  .0006  0.4074  .0007  
 48819 -.1248  .0007  0.4100  .0007  
 48820 -.1238  .0007  0.4119  .0008  
 48821 -.1209  .0006  0.4130  .0008  

-  GFZ06537.CLK
   ============
   
   The format of the clock parameter file is described in the
   IGS Message No. 55

==============================================================================