Subject: [IGEXMail-0092] Wk 0982 CODE IGEX Analysis Report
From: [email-masked] (D. Ineichen)
Date: 26 Nov 1998 17:51:47

Precedence: bulk

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IGEX Electronic Mail    26-Nov-1998 17:51:47                   Message No 0092
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Author: [email-masked] (D. Ineichen)
Subject: Wk 0982 CODE IGEX Analysis Report

Author: M. Rothacher
 
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CODE IGEX REPORT GPS WEEK 0982 (DAYS 305-311, DATES 01-11-98 - 07-11-98)
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Submitted by: Astronomical Institute, University of Berne, Switzerland
              Products available through anonymous ftp using:
              ftp ubeclu.unibe.ch  -or-  ftp 130.92.6.17
              after login: cd aiub$ftp; cd code
 
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PROCESSING STRATEGY:                                                           
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- The analysis was done by fixing the GPS orbits and Earth rotation parameters 
  to the CODE final GPS solution.                                              
                                                                               
- The orbital parameters for the GLONASS satellites were estimated using double
  difference phase observations (including double differences between GLONASS  
  and GPS satellites). Six initial conditions and nine radiation pressure para-
  meters per satellite were determined. No pseudo-stochastic pulses have been  
  introduced up to now.                                                        
                                                                               
- So far only receivers providing dual frequency GPS and GLONASS or dual fre-  
  quency GLONASS measurements were included in the solution.                   
                                                                               
- The daily orbit results stem from the middle day of a 3-day arc.             
                                                                               
- The satellite clock values included in the precise orbit files are broadcast 
  clock values for the GLONASS satellites (no improvement done so far) and     
  precise CODE estimates for the GPS satellites.                               
                                                                               
- At present only the site ZIMZ (Zimmerwald, Switzerland) was constrained to   
  its ITRF96 coordinates.                                                      

- Two different types of orbit fits were performed to check the consistency of
  the orbit results (see tables below):
    - One 7-day arc through all daily orbit solutions of the week.
    - Seven 3-day arcs. Note that the RMS values in the table are referred
      to the middle day of the corresponding 3-day arc.
                                                                               
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FILES SENT TO GLOBAL DATA CENTERS:                                             
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COX0982N.EPH   GLONASS/GPS DAILY SATELLITE EPHEMERIDES, SP3 FORMAT (N=0..6)    
COX09827.SUM   THIS TEXT FILE                                                  
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------------------------------------------------------                         
THREE DAY SOLUTION STATISTICS:                                                 
------------------------------------------------------                         
MIDDLE DAY  FILES  OBSERVATIONS   PARAMETERS  RMS (MM)                         
------------------------------------------------------                         
305          42    216292          4774        1.4
306          41    213980          4722        1.3
307          42    211160          4808        1.3
308          44    221938          5012        1.3
309          46    228441          5018        1.3
310          45    228250          4955        1.3
311          41    205934          4666        1.3
------------------------------------------------------                         

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 ORBIT REPEATABILITY FROM A 7-DAY FIT THROUGH DAILY ORBIT SOLUTIONS (CM)        
 -------------------------------------------------------------------------------
     103 104 106 109 110 111 112 113 115 116 117 118 120 122
 -------------------------------------------------------------------------------
 305  20  25  31 135  59 122  33 146 113  49  28  22  19  17
 306  19  17  32 102  39  97  32 148  83  54  25  30  22  19
 307  34  25  31  95  47  87  44  --  84  53  23  16  20  20
 308  27  22  31  49  32  44  61  --  67  76  21  22  22  20
 309  33  28  31 104  37  98  99  66  88  45  20  16  25  22
 310  30  24  34 103  48  98  --  77  99  65  21  22  19  19
 311  32  25  49 135  52 137  -- 108 121  67  26  27  22  27
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 ALL  28  24  34 107  46 101  59 114  95  59  24  23  21  21
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 ORBIT REPEATABILITY FROM 3-DAY FITS THROUGH DAILY ORBIT SOLUTIONS (CM)        
 -------------------------------------------------------------------------------
     103 104 106 109 110 111 112 113 115 116 117 118 120 122
 -------------------------------------------------------------------------------
 305   6   7  18  11  30   9  24  10  14  29  10  13   5   7
 306  10   9  10  14  27   8   7   9  10  27   8  14   5   4
 307  10  10   8  16  17   8  16  --  14  15   8  10   5   4
 308  10   8   8   6  17   7  63  --  12  20   9   8   5   4
 309   8   7   9   8  11   9  41   4   8  20   5   6   7   6
 310   8   7  15   8  12  10  --   9   7  13   5   7   7   8
 311   8   5  14  10   8  16  --   8   7  19   9   7   5   8
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 WEEKLY COORDINATE COMPARISON OF 1-DAY (Z1) SOLUTIONS                           
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 TOTAL NUMBER OF STATIONS:    17
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                       WEEKDAY  RESIDUAL RMS IN MM
 STATION        #DAYS  0123456     N     E     U
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 3SNA 49918S001     7  MMMMMMM     5    14    19
 BORG 12205M004     7  MMMMMMM     5     5     4
 BRUG 13101M005     7  MMMMMMM     5     6     3
 DLRA 14208M002     7  MMMMMMM     7     6     7
 GODZ               7  MMMMMMM     4     1     3
 IRKZ               7  MMMMMMM     4     5    19
 KHAB               7  MMMMMMM     5     9    16
 KR0G 10422M001     7  MMMMMMM     5     5     2
 LDS1 13215M001     7  MMMMMMM     5     8     6
 LRBA 10093M001     7  MMMMMMM     5     6     1
 METZ 10503M005     7  MMMMMMM     5     4     4
 MTKA 21741S002     4     MMMM     7     7     5
 OS0G 10402M004     7  MMMMMMM     5     5     2
 REYZ 10202M003     7  MMMMMMM     4     4     2
 SL1X 40446S001     7  MMMMMMM     2     2     3
 VSLD 13502M008     7  MMMMMMM     9    12     8
 ZIMZ 14001M005     7  WWWWWWW     3     2     2
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 # Coordinate Estimates:   116     5     6     8
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