Author:  AC Coordinator / AIUB/CODE

Rapid IGS Orbit Prediction Combination - Week 1088   Day: 3   (Nov 15, 2000)

Contacts: T.A. Springer (springer@aiub.unibe.ch)
          H. Bock (bock@aiub.unibe.ch), R. Dach (dach@aiub.unibe.ch)


COMBINATION STRATEGY:

For a complete description of the combination strategy along with all tables 
and statistics, please refer to the IGS Final Combination reports posted on 
CDDIS within 11 days after the end of the GPS week.


REMARKS on IGS Rapid Orbit Prediction Combination:


1. Clock corrections found in the IGP sp3 orbit file are clock predictions 
   provided by COP. Users are reminded to use them with extreme caution.

_______________________________________________________________________________


Table 1: Daily transformation of each centre to the combined IGP orbit and
         clocks. 

         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
         Units: meters, mas, ppb, nano-sec, nano-sec/day.

Table 1.1088.3   GPS week: 1088   Day: 3   MJD: 51863.0

CENT STA|  DX   DY   DZ    RX    RY    RZ  SCL  RMS WRMS |   TOFT  TDRFT    RMS
--------|------------------------------------------------|---------------------
cop  n/a|-.01 0.00 0.00  0.13 -1.04  1.45 -0.1 0.12 0.11 |    0.0    0.0   0.00
emp  n/a|0.00 0.00 0.04 -1.07  1.41 -3.26 -0.5 0.24 0.17 |    0.0    0.0   0.00
gfp  n/a|0.00 0.00-0.03  1.48  1.19  0.32  0.9 0.51 0.26 |    0.0    0.0   0.00
sip  n/a|0.00 0.01 0.00 -1.48  1.58 -3.10 -0.2 0.95 1.20 |    0.0    0.0   0.00
usp  n/a|0.01 0.00-0.07  0.92 -0.34  2.86  0.7 0.97 0.85 |    0.0    0.0   0.00


Table 2: Daily fit for each satellite and each centre resulting from weighted
         average combination. 

         The last column gives the IGP resulting satellite accuracy measures 
         found in the IGP SP3 header. Eclipsing satellites are flagged with
         and "E" beside the PRN number.
         "MEDI" stands for median of the centre's satellite RMS.

         Units: cm.

Table 2.1088.3   GPS week: 1088   Day: 3   MJD: 51863.0

        Weighted Average
 PRN  | cop emp gfp sip usp  IGP |
------|--------------------------|
   1  |   9  12  15 167  51   17 | 
   2  |   5  31  49  16  23   12 | 
  X3  |   9  37  37 ---  18   14 | 
   4  |  11  11  31  92  18   11 | 
   5  |   4  29  32 166 226   29 | 
   6  |   7  20  18  55  34    9 | 
   7  |   4  20  39 123  48   15 | 
   8  |  13  19  26  52  35   10 | 
   9  |   8  13  16  37  21    6 | 
  10E |  10  34 111  17  35   23 | 
  11  |  11  18  30 171  31   18 | 
  13  |   7  14  17 109  22   11 | 
 X15  |   6  35  47  18 ---   15 | 
  17  |   6  15  13  31  14    6 | 
  19  |  11  38  16 143 201   26 | 
  20E |  13  21  54  74  50   15 | 
  21E |  35  14 171  14 170   38 | 
  22  |   9  42  18  67 173   22 | 
  24  |  24  24  71  82  64   20 | 
  25  |   5   9  12 111  37   11 | 
  26  |   5  13  27  86  25   10 | 
  27  |   8  15  15  37  18    7 | 
  28  |  15  57  33  52 141   22 | 
  29  |   6  14  16  15  18    6 | 
  30  |  12  14  28 133 191   24 | 
  31  |   9  22  18  81  28   11 | 
------|--------------------------|
 RMS  |  12  24  51  95  97      | 
 WRMS |  11  17  26 120  85      |
 MEDI |   9  20  28  74  35      |