Subject: [IGEXMail-0305] Wk 0997 CODE IGEX Analysis Report
From: [email-masked] (D. Ineichen)
Date: 22 Apr 1999 19:11:29

Sender: [email-masked]
Precedence: bulk

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IGEX Electronic Mail    22-Apr-1999 19:11:29                   Message No 0305
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Author: [email-masked] (D. Ineichen)
Subject: Wk 0997 CODE IGEX Analysis Report

Author: M. Rothacher
 
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CODE IGEX REPORT GPS WEEK 0997 (DAYS 045-051, DATES 14-02-99 - 20-02-99)
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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.                               
                                                                               
- The following sites are constrained to their ITRF96 coordinates:             
                                                                               
      - KR0G 10422M001 (Kiruna, Sweden)                                        
      - METZ 10503M005 (Metsahovi, Finland)                                    
      - OS0G 10402M004 (Onsala, Sweden)                                        
      - YARR 50107M006 (Yaragadee, Australia)                                  
      - ZIMZ 14001M005 (Zimmerwald, Switzerland)                               

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FILES SENT TO GLOBAL DATA CENTERS:                                             
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COX0997N.EPH   GLONASS/GPS DAILY SATELLITE EPHEMERIDES, SP3 FORMAT (N=0..6)    
COX09977.SUM   THIS TEXT FILE                                                  
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FIVE DAY SOLUTION STATISTICS:                                                  
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MIDDLE DAY  FILES  OBSERVATIONS   PARAMETERS  RMS (MM)                         
------------------------------------------------------                         
 45         124    588936         12922        1.2
 46         125    609041         13222        1.3
 47         128    633756         13811        1.3
 48         129    636240         14025        1.3
 49         131    641272         14080        1.2
 50         133    682365         14398        1.2
 51         134    670689         14706        1.2
------------------------------------------------------                         

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 ORBIT REPEATABILITY FROM A 7-DAY FIT THROUGH DAILY ORBIT SOLUTIONS (CM)
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     101 103 104 106 107 108 109 110 111 113 116 117 118 120 122
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  45  --   3   5  10  58   8  10  10   5   4   6  20   7   4  50
  46  --   2   4  10  97   6   5   6   3   5   7  24   6   3  83
  47  --   3   4   7  81   5   7  10   5   4   6  13   8   3  75
  48  --   5   6   8  59   6   6  10  10   4   6  19   9   4  50
  49  12   2   5   7  31   3   6  11   4   3   6  16  10   3  30
  50   6   4   4   9  39   6   9  13  12   3  10  10  10   4  34
  51   8   3   6  11  40   5  10   6   9   2   8   9  11   6  37
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 ALL   9   3   5   9  62   6   8  10   8   4   7  17   9   4  55
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 Remarks: - These RMS values may be too optimistic, because we fit the middle 
            days of 5-day arcs with a 7-day arc.                            

          - Starting from DOY 049 the orbit for the newly launched GLONASS
            satellite with slot number 1 were determined.

          - The 5-day arcs of GLONASS satellites no. 107 and no. 122 were 
            split up between DOY 046 and DOY 047 due to satellite modeling 
            problems.             

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 WEEKLY COORDINATE COMPARISON OF 1-DAY (Z1) SOLUTIONS                           
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 TOTAL NUMBER OF STATIONS:    29
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                       WEEKDAY  RESIDUAL RMS IN MM
 STATION        #DAYS  0123456     N     E     U
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 3SNA 49918S001     7  PPPPPPP    52    42   120
 BIPD 10094M001     4  P PPP       7     5     6
 BORG 12205M004     7  PPPPPPP     4     7    21
 BRUG 13101M005     4  PP   PP     6     8     7
 DLRA 14208M002     7  PPPPPPP     4     5    21
 HERP 13212M009     7  PPPPPPP    12    37    56
 IRKZ               5  PP PP P     3     9    12
 KHAB               7  PPPPPPP     6    11     8
 KR0G 10422M001     7  PPPPPPP     -     -     -   CONSTRAINED
 LDS1 13215M001     7  PPPPPPP     4     9    21
 LINR               7  PPPPPPP    24    85    41
 LRBA 10093M001     7  PPPPPPP     4     2     4
 MAGD               7  PPPPPPP     8     8     9
 MDVZ               7  PPPPPPP     3     3     6
 METZ 10503M005     6  PP PPPP     -     -     -   CONSTRAINED
 MTKA 21741S002     4     PPPP     8     9    12
 NPLC 13234M001     6  PPP PPP    22    37    67
 OS0G 10402M004     7  PPPPPPP     -     -     -   CONSTRAINED
 REUN 97401M003     6  P PPPPP    26    68    32
 STRR 50119M002     7  PPPPPPP    26    71    32
 SUNM 50143M001     7  PPPPPPP    24    81    60
 THU2 43001M002     6   PPPPPP     5     5     8
 TSKA 21730M003     7  PPPPPPP     9    11     9
 VSLD 13502M008     7  PPPPPPP     4     9    16
 WTZZ 14201M014     7  PPPPPPP     4     3     3
 YAKT               6  PP PPPP     3     9     7
 YARR 50107M006     4   PPPP       -     -     -   CONSTRAINED
 ZIMJ 14001M006     7  PPPPPPP     4     5     6
 ZIMZ 14001M005     7  PPPPPPP     -     -     -   CONSTRAINED
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