[IGSREPORT-471] ESA07117.SUM

[C.GARCIA]

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IGS Electronic Report      3-SEP-1993 15:18:39       Message Number 471
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From: C.GARCIA
Subj: ESA07117.SUM
------------------


 -------------------------
 ANALYSIS CENTRE: ESA/ESOC
 -------------------------

 OUTLINE OF THE ESTIMATION OF GPS-ORBITS AND EARTH ROTATION PARAMETERS
 AT THE ESOC PROCESSING CENTRE FOR IGS

 J.M.Dow, J.Feltens, T.J.Martin-Mur, C.Garcia-Martinez

 Description of analysis for period 1993 Aug 22 - Aug 28
                                                        (week 0711)
 1. SOFTWARE USED:   GPSOBS/BAHN-Version 5

 2. MODELS USED AND PARAMETERS ESTIMATED/FIXED:

  For a description of models and parameters used ==> see IGS - Mail  51
  For updates of the models and parameters used   ==> see IGS - Mail 114 and
                                                      see IGS - Rep. 224,277

 3. REMARKS: -We have introduced in our processing Perth,
              the new ESA station.
             -RCM2 was replaced by RCM4.
             -The orbit of satellite PRN03 is affected on days
              234 and 235 by the lack of observations between
              10:00 on day 234 and 10:00 on day 235. The satellite
              was tracked only sporadically by RCM4 and HART.
             -Similar situation for satellite PRN25. Between
              17:00 on day 235 and 15:00 on day 236, the tracking
              was very limited. For more than 10 hours it was not
              tracked at all or it was tracked only by one station.
              Our preprocessing, based in double differences, cannot
              make observations in these periods.

 4. GROUND STATIONS: Boucher and Altamimi, IGS workshop Berne 24-27 March'93
                     IGS/IERS station coordinates in the ITRF91 at 1992.6
 ___________________________________________________________
 GPSweek|ALGO  HART  KOUR  MATE  RCM4  TROM  YAR1  |f |e |t
 0711___| FAIR  KIRU  MADR  MCMU  SANT  USUD  YELL |i |s |o
    |DAY|  GOLD  KOKB  MASP  PERT  TIDB  WETT      |x.|t.|t.
 ---|---|------------------------------------------|--|--|--
    |234| FFF   FeF   eFe   eee   eFF   FeF   FF   |12| 8|20
    |235| FFF   FeF   eFe   eee   eFF   FeF   FF   |12| 8|20
    |236| FFF   FeF   eFe   eee   eFF   FeF   FF   |12| 8|20
    |237| FFF   FeF   eFe   eee   eFF   FeF   FF   |12| 8|20
    |238| FFF   FeF   eFe   eee   -FF   FeF   FF   |12| 7|19
    |239| FFF   FeF   eFe   eee   -FF   FeF   FF   |12| 7|19
    |240| FFF   FeF   eFe   eee   -FF   FeF   FF   |12| 7|19

    with: "F" ... coordinates of ground station kept fixed,
          "e" ... coordinates of ground station estimated,
          "-" ... ground station not included on that day.

 5. ORBIT FIT MINUS EXTRAPOLATION FROM PREVIOUS DAY, RMS IN <METER>

  \DAY|  234   235   236   237   238   239   240
   \  |
    \ |
  SAT\|
  ----|-------------------------------------------
   02 |  0.4   0.8   0.5   0.6   1.1   0.7   1.1
   03 |  1.8   1.9   0.8   0.7   0.3   0.6   0.4
   12 |  0.3   0.5   0.4   0.4   0.7   0.5   0.4
   13 |  0.2   0.4   0.4   0.3   0.7   0.7   0.9
   14 |  0.5   0.9   0.9   0.9   0.8   0.6   0.7
   15 |  0.5   0.8   0.7   0.4   0.4   0.6   0.6
   16 |  1.7   0.6   1.0   1.1   0.7   2.7   1.0
   17 |  1.0   1.6   0.6   0.7   1.1   0.8   0.8
   18 |  0.4   0.9   0.4   1.3   1.1   1.9   0.8
   19 |  0.4   0.6   0.5   0.4   0.7   0.4   0.8
   20 |  0.7   1.2   1.0   2.1   1.5   0.6   0.8
   21 |  0.8   0.8   0.6   1.0   0.3   0.7   1.1
   22 |  0.7   0.7   0.7   1.2   1.2   0.9   0.8
   23 |  1.3   1.1   0.6   1.3   0.4   1.6   0.7
   24 |  0.7   0.8   0.3   0.9   0.9   0.9   1.8
   25 |  0.4   0.5   0.6   1.0   0.7   1.1   0.4
   26 |  0.6   1.0   0.8   1.1   0.3   1.2   0.6
   27 |  0.7   0.6   0.4   0.7   0.8   0.5   0.9
   28 |  0.4   0.8   0.6   0.9   0.5   0.4   0.5
   29 |  0.7   1.0   0.3   0.9   0.8   0.7   1.1
   01 |  0.7   1.2   1.3   1.8   1.4   1.2   2.1
   31 |  0.6   0.9   0.4   0.8   0.7   1.0   0.8
   07 |  0.3   0.5   0.6   0.6   0.8   0.8   1.6
   09 |  0.2   0.5   0.5   0.4   0.6   0.5   0.7

 6. PRODUCTS GENERATED:

  The following products are generated and stored in CDDIS at NASA/GSFC:

  ESA0711*.EPH - Precise GPS orbits, *=0 for Sunday,..., 6 for Saturday
  ESA07117.ERP - Earth rotation results for week 0711 (including DUT1)
  ESA07117.SUM - This summary file

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