Subject: [IGEXMail-0230] Wk 0991 CODE IGEX Analysis Report
From: [email-masked] (D. Ineichen)
Date: 03 Mar 1999 15:10:17

Precedence: bulk

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IGEX Electronic Mail    03-Mar-1999 15:10:17                   Message No 0230
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Author: [email-masked] (D. Ineichen)
Subject: Wk 0991 CODE IGEX Analysis Report

Author: M. Rothacher
 
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CODE IGEX REPORT GPS WEEK 0991 (DAYS 003-009, DATES 03-01-99 - 09-01-99)
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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 5-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.                                                      

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FILES SENT TO GLOBAL DATA CENTERS:                                             
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COX0991N.EPH   GLONASS/GPS DAILY SATELLITE EPHEMERIDES, SP3 FORMAT (N=0..6)    
COX09917.SUM   THIS TEXT FILE                                                  
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------------------------------------------------------                         
FIVE DAY SOLUTION STATISTICS:                                                  
------------------------------------------------------                         
MIDDLE DAY  FILES  OBSERVATIONS   PARAMETERS  RMS (MM)                         
------------------------------------------------------                         
  3         106    454225         10813        1.4
  4         108    463152         11269        1.4
  5         110    466982         11242        1.4
  6         109    484036         11176        1.4
  7         110    501334         11438        1.4
  8         109    482137         11116        1.4
  9         106    457357         10483        1.4
------------------------------------------------------                         

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 ORBIT REPEATABILITY FROM A 7-DAY FIT THROUGH DAILY ORBIT SOLUTIONS (CM)
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     103 104 106 109 110 111 113 116 117E120E122E
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   3   6   6   7   6  44   5  13   6   7   6   6
   4   3   4   9   8  22   5  11   7   3   6   7
   5   5   3   8   5  21   4   9   6   4   5   3
   6   6   5   6   9  17   5  10   7   6   6   7
   7   4   4   7   6  17   4   6   8   5   6   6
   8   8   7   7   8  20   8   8   9   7  10   7
   9   4   4  12  10  20   5   9  12   8   5   5
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 ALL   5   5   8   7  25   5  10   8   6   7   6
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 Remark: These RMS values may be too optimistic, because we fit the middle days 
         of 5-day arcs with a 7-day arc.                                        

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 WEEKLY COORDINATE COMPARISON OF 1-DAY (Z1) SOLUTIONS                           
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 TOTAL NUMBER OF STATIONS:    24
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                       WEEKDAY  RESIDUAL RMS IN MM
 STATION        #DAYS  0123456     N     E     U
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 3SNA 49918S001     7  PPPPPPP    85   122   238
 BIPD 10094M001     5    PPPPP    14     6    38
 BORG 12205M004     6  P PPPPP     6     8    19
 BRUG 13101M005     6  PP PPPP     3    10    13
 GODZ               5  PPPPP       8    27    37
 HERP 13212M009     7  PPPPPPP    19    17    55
 IRKZ               6   PPPPPP     9     7     6
 KHAB               7  PPPPPPP     9     7     8
 KR0G 10422M001     7  PPPPPPP     3     4     7
 LDS1 13215M001     6  PPPPP P     6     9    23
 LRBA 10093M001     7  PPPPPPP     2     5     4
 MDVZ               7  PPPPPPP     4     6    14
 METZ 10503M005     7  PPPPPPP     4     7     5
 MTKA 21741S002     6  P PPPPP     7     6    12
 NPLC 13234M001     7  PPPPPPP    19    39   124
 OS0G 10402M004     7  PPPPPPP     4     4     3
 REUN 97401M003     6  PP PPPP    32    23    49    *)
 REYZ 10202M003     7  PPPPPPP     2     4    11
 STRR 50119M002     7  PPPPPPP    25   110    21    *)
 THU2 43001M002     7  PPPPPPP     3     6     8
 TSKA 21730M003     7  PPPPPPP     8     8    11
 VSLD 13502M008     7  PPPPPPP     3     8    10
 YARR 50107M006     7  PPPPPPP    34    49    18    *)
 ZIMZ 14001M005     7  PPPPPPP     -     -     -   FIXED
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 *) Very isolated sites                                                       
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