Subject: [IGSREPORT-277] ESA06947.SUM and ESA06957.SUM
From: J. Feltens
Date: 19 MAY 1993 09:30:04

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IGS Electronic Report     19-MAY-1993 09:30:04       Message Number 277
***********************************************************************

From: J. Feltens
Subj: ESA06947.SUM and ESA06957.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.Martin-Mur, C.Garcia-Martinez

 Description of analysis for period 1993 April 25 - May 01
                                                          (week 0694)
 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

             We have started to use a cycle slip detection algorithm based in
             the (4,-3) and (5,-4) L1,L2 combinations. These two combinations
             have the advantage of being almost ionospheric free, but with
             integer ambiguities. Before we were using the L3 ionospheric
             free combination to look for cycle slips, but some combinations
             of L1 and L2 cycle slips may produce a jump in L3 that is
             smaller than the noise of the signal.

 3. REMARKS: A/S has been switched on from  day 118 (28 April 93) 12:00 until
             day 123 (03 May 93) 00:00. As in  week 0693, our ERPs as well as
             our precise orbits are obviously deteriorated because of A/S.For
             some satellites only a very  few measurements  were available on
             days 120 and 121 (30 April , 01 May 93) resulting in weakly de-
             termined orbits for these satellites:  SV-14/PRN14, SV-15/PRN15,
             SV-16/PRN16, SV-25/PRN25, SV-26/PRN26, SV-28/PRN28, SV-29/PRN29,
             SV-32/PRN01.

 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  MADR  MCMU  SANT  USUD  YELL  |f |e |t
 0694___| FAIR  KOKB  MASP  PAMA  TIDB  WETT       |i |s |o
    |DAY|  GOLD  KOUR  MATE  RCM2  TROM  YAR1      |x.|t.|t.
 ---|---|------------------------------------------|--|--|--
    |115| FFF   FFe   Fee   e-e   FFF   eFF   F    |12| 6|18
    |116| FFF   FFe   Fee   e--   FFF   eFF   F    |12| 5|17
    |117| FFF   FFe   Fee   e--   FFF   -FF   F    |12| 4|16
    |118| F-F   FFe   Fee   e-e   FFF   eF-   F    |10| 6|16
    |119| FFF   FFe   Fee   e-e   FFF   eFF   F    |12| 6|18
    |120| FFF   FFe   Fee   e-e   FFF   eFF   F    |12| 6|18
    |121| FFF   FFe   Fee   e-e   F-F   eFF   F    |11| 6|17

    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|  115   116   117   118   119   120   121
   \  |
    \ |
  SAT\|
  ----|-------------------------------------------
   01 |  1.4   1.0   1.3   2.0  15.9   8.0  36.8
   02 |  1.9   0.8   1.9   2.7   2.3  13.2  15.2
   03 |  1.9   0.9   0.8   0.7   1.5   1.9   2.1
   11 |  1.3   4.3   0.8   3.3   1.8   1.2   2.3
   12 |  0.9   0.8   1.0   1.2   1.2   2.1   2.0
   13 |  1.1   1.0   1.0   1.0   2.1   0.8   1.2
   14 |  0.8   1.5   0.9   1.3   3.4   9.2   4.0
   15 |  0.8   1.0   2.5   1.3   4.1 250.6 703.5
   16 |  2.2   1.0   1.4   1.0   3.8   2.2   7.1
   17 |  1.5   1.8   1.1   1.1   1.8   2.1   1.9
   18 |  1.3   2.1   3.0   0.9   2.3   1.7   1.6
   19 |  1.1   2.6   1.0   2.7   2.1  10.8   2.7
   20 |  0.8   1.4   0.9   1.2   5.2   2.2   4.3
   21 |  1.2   1.1   1.2   0.9   3.7   4.2   8.7
   22 |  1.0   2.1   4.0   0.9   8.4   2.1   1.5
   23 |  1.5   0.7   1.6   1.1   1.4   3.8   4.8
   24 |  0.9   1.0   0.5   4.4  14.2   5.3  14.6
   25 |  1.7   1.1   1.9   2.2   5.5   7.2  22.0
   26 |  2.2   2.6   2.2   0.9   1.1  12.3  22.3
   27 |  1.2   1.1   2.0   0.4   2.8   4.9   2.5
   28 |  1.4   1.9   1.3   1.1   2.7   8.1  11.2
   29 |  0.9   1.9   2.1   2.3   2.1   7.6  36.2
   31 |  1.4   1.9   1.8   1.2   2.0   1.6   1.3

 6. PRODUCTS GENERATED:

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

  ESA0694*.EPH - Precise GPS orbits, *=0 for Sunday,..., 6 for Saturday
  ESA06947.ERP - Earth rotation results for week 0694 (including DUT1R)
  ESA06947.SUM - This summary file

 End of Message
 -------------------------
 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.Martin-Mur, C.Garcia-Martinez

 Description of analysis for period 1993 May 02 - May 08
                                                        (week 0695)
 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. 22i and
                                                      see ESA06947.SUM

 3. REMARKS: A/S has been switched on from  day 118 (28 April 93) 12:00 until
             day 123 (03 May 93) 00:00.  As in  weeks 0693 and 0694, our ERPs
             as well as our precise orbits are obviously deteriorated because
             of A/S. For some  satellites  only a very few measurements  were
             available  on day 122 (02 May 93) resulting in weakly determined
             orbits for these satellites: SV-14/PRN14, SV-15/PRN15,
                  SV-25/PRN25, SV-28/PRN28, SV-29/PRN29, SV-32/PRN01.
                  SV-08/PRN11 has been switched off on day 124 (04 May 93) at
             00:20 (CANSPACE mail of 10 May 93) and has been taken out of our
             IGS processing on day 125 (05 May 93).

 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  MADR  MCMU  SANT  USUD  YELL  |f |e |t
 0695___| FAIR  KOKB  MASP  PAMA  TIDB  WETT       |i |s |o
    |DAY|  GOLD  KOUR  MATE  RCM2  TROM  YAR1      |x.|t.|t.
 ---|---|------------------------------------------|--|--|--
    |122| FFF   FFe   Fee   e-e   FFF   -FF   F    |12| 5|17
    |123| FFF   FFe   Fee   e-e   -FF   -FF   F    |11| 5|16
    |124| FFF   FFe   Fee   e-e   FFF   -FF   F    |12| 5|17
    |125| FFF   FFe   Fee   e-e   FFF   -FF   F    |12| 5|17
    |126| FFF   FFe   Fee   e-e   FFF   -FF   F    |12| 5|17
    |127| FFF   FFe   Fee   e-e   FFF   eFF   F    |12| 6|18
    |128| FFF   FFe   Fee   e-e   -F-   eFF   -    | 9| 6|15

    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|  122   123   124   125   126   127   128
   \  |
    \ |
  SAT\|
  ----|-------------------------------------------
   01 | 33.6   5.3   3.6   2.4   0.9   1.0   2.1
   02 |  2.3   4.2  11.4   1.4   0.8   2.5   1.5
   03 |  2.5   4.7   5.5   1.4   0.6   2.9   0.9
   11 |  4.8   5.8  67.8   ---   ---   ---   ---
   12 |  3.0   5.1   8.0   1.0   0.4   1.4   0.6
   13 |  2.7   7.1   6.9   1.0   1.0   1.0   1.1
   14 | 21.0  18.1   4.9   1.8   0.7   2.1   2.4
   15 |765.5   8.1   4.1   2.6   1.5   2.0   1.6
   16 |  9.7  15.0   7.2   3.2   2.5   2.8   1.6
   17 |  8.7   5.3   3.9   0.7   0.7   0.8   0.8
   18 |  6.6   4.8   6.3   1.6   1.8   1.6   1.5
   19 |  2.5   4.0   6.3   1.6   1.1   1.4   1.9
   20 |  7.4   7.4   6.6   3.2   0.5   1.5   0.9
   21 |  4.0   8.4   4.7   1.5   1.4   0.7   2.3
   22 |  2.7   4.3   4.7   3.0   1.0   1.8   1.1
   23 | 11.5   7.4   4.7   1.0   0.5   2.4   0.9
   24 | 11.1  13.8   6.4   2.8   0.6   2.3   0.7
   25 | 17.8   6.5   6.3   1.5   1.2   1.3   0.8
   26 |  6.2   7.2   7.3   3.3   1.3   3.1   3.5
   27 |  3.1   5.5   5.0   1.2   0.8   3.2   2.1
   28 | 19.9  11.0   8.1   3.0   2.9   2.4   2.0
   29 | 85.3   7.3   4.7   1.6   0.8   0.9   1.6
   31 |  8.7   6.7   6.8   2.7   1.4   2.5   1.9

 6. PRODUCTS GENERATED:

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

  ESA0695*.EPH - Precise GPS orbits, *=0 for Sunday,..., 6 for Saturday
  ESA06957.ERP - Earth rotation results for week 0695 (including DUT1R)
  ESA06957.SUM - This summary file

 End of Message