Subject: [IGSMAIL-54] esa06517.sum
From: joachim feltens
Date: 29 JUL 1992 15:01:41

***********************************************************************
IGS Electronic Mail       29-JUL-1992 15:01:41       Message Number 54
***********************************************************************
 
==============================================================================
                   THIS FILE CONTAINS 6 MESSAGES
==============================================================================

From:     Joachim Feltens <S=JFELTENS;OU=ESOC;O=bitnet;P=switch;A=arcom;C=CH>
Subject:  esa06517.sum
          ------------

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

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

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

Description of analysis for period 1992 June 28 - July 4 (days 180-186,
                                                          GPS week 651)
1. SOFTWARE USED:   GPSOBS/BAHN5

2. MODELS AND CONSTANTS USED

   a) General:

      - Velocity of Light:              c  = 299792.458  <km/s>
      - Earth Gravitational Constant:   GM = 398600.4415 <km**3/s**2>
      - Mean Equatorial Earth Radius:   Ae =   6378.137  <km>
      - Solid Earth Tidal Love no.:     h  =      0.6090
      - Solid Earth Tidal Shida no.:    l  =      0.0852

   b) Satellite Force Model:

      - Geopotential, GEM-T3 (n = 8, m = 8
                              plus C21 = -0.17e-09 and S21 = 1.19e-09)
      - Solar Third Body Attraction
      - Lunar Third Body Attraction
      - Solid Tides, k2 = 0.300, phi = 0, Wahr frequency dependent corrections
      - Ocean Tides , Schwiderski; n = 6, m = 2, 11 tidal constituents
      - Non-Gravitational:
          Solar Pressure + Thermal Emission: Fliegel et al. (1992),
                                     models T10 for BLOCK I and T20 for BLOCK II
          Y-bias acceleration

      The tracking data of all 17 GPS satellites available at the moment are
      used.

   c) Ground Stations:

      The following table gives an overview over the ground stations,  that have
      been included into the GPS-data processing at ESOC. Except where otherwise
      noted ("remarks"), corrections are taken from IGS Mail No. 33  -  IGS site
      information and coordinates  -  (Boucher and Altamimi).
      __________________________________________________________________________
                          |             |    |    GPS WEEK 651     |
                          |             |    | 1  1  1  1  1  1  1 |
                          |             |    | 8  8  8  8  8  8  8 |
              SITE        |   COUNTRY   |CODE| 0  1  2  3  4  5  6 |  REMARKS
      --------------------|-------------|----|---------------------|------------
        Algonquin         | Canada      |ALGO| F  F  F  F  F  F  F |
        Canberra          | Australia   |CANB| E  E  E  E  E  E  E | Bern
        Penticton         | U.S.A.      |DRAO| E  E  E  E  E  E  E |
        Fairbanks         | U.S.A/Alaska|FAIR| F  F  F  F  F  F  F |
        Goldstone         | U.S.A.      |GOLD| E  E  E  E  E  E  E |
        Herstmonceux      | U.K.        |HERS| ------------------- |
        Kokee Park        | U.S.A/Hawaii|KOKB| -- E  E  E  E  E  E |
        Kourou      (ESA) | French Guyan|KOUR| ------------------- |
        Madrid            | Spain       |MADR| F  F  F  F  F  F  F |
        Maspalomas  (ESA) | Spain/Can.Is|MASP| E  E  E  E  E  E  E |
        Matera            | Italy       |MATE| ------------------- |
        McMurdo           | Antarctica  |MCMU| E  E  E  E  E  E -- | IGS Mail 44
        Metsahovi         | Finland     |METS| ------------------- |
        Ny Alesund/Spitzb.| Norway      |NALL| ----------- E ----- |
        Onsala            | Norway      |ONSA| ------------------- |
        Pamate/Tahiti     | France      |PAMA| E  E ------ E  E -- | IGS Mail 44
        Santiago          | Chile       |SANT| ------------------- | IGS Mail 35
        Tai-Shi           | Taiwan      |TAIW| ------------------- | Bern
        Tromsoe           | Norway      |TROM| ------------------- |
        Usuda             | Japan       |USUD| E  E  E  E  E  E  E |
        Wettzell          | Germany     |WETB| ------------------- |
        Yaragadee         | Australia   |YAR1| F  F  F  F  F  F  F |
        Yellowknife       | Canada      |YELL| F  F  F  F  F  F  F |

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

      These coordinates are referred to ITRF91 at epoch 1992.5 (IGS Mail No. 33)

      - Atmospheric modelling is done according to the Willmann-Model

      - Ground Station Receiver Clock Biases are ignored in the evaluations

   d) Earth Rotation Parameters:   IERS Bulletin A, UT1 held fixed

   e) Observations:

      Double differenced carrier phases, ionosphere-free combination.
      Elevation cutoff set to 10 degrees, evaluation of the data on day-by-day
      basis.

3. PARAMETERS TO BE ESTIMATED PER 1-DAY ARC

   a) Satellite Parameters per Spacecraft:
                                 . . .
      - one orbital state X,Y,Z, X,Y,Z at start epoch
      - one scaling factor for solar pressure T10 or T20 model
      - one Y-bias acceleration
      - one satellite clock drift parameter

   b) Station related parameters per ground station:

      - ground station position (if marked with an "E" in the table)
      - every 3 hours an atmospheric zenith delay parameter  (Willmann Model)
      - DD-phase ambiguities as real-valued parameters (at least one for each
        observable double difference combination,  additional parameters  for
        cycle slips)

   c) Earth Rotation Parameters:

      - one pair of pole coordinates xp and yp per day

4. PARAMETERS TO BE KEPT FIXED IN THE SOLUTION

   a) Satellite Parameters per Spacecraft:

      - solar pressure scaling factor GX and GZ in spacecraft body fixed x- and
        z-axis are kept fixed with value 1.0

   b) Station related parameters per Ground Station:

      - ground station position (if marked with an "F" in the table)

5. PRODUCTS GENERATED

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

   ESA06517.EPH   - Precise GPS orbits for week 651 in NGS-format
   ESA06517.ERP   - Earth rotation results for week beginning 1992 June 28
   ESA06517.SUM   - The name of this text file

==============================================================================

From:     Joacim Feltens
Subject:  ERP-files
          ---------

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

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

SUBECT: Eccident when submittig our ERP-files

When I submitted our second ERP-file this morning, I had to see, that all re-
cords being longer than 80, have been cut off by the mailing proceedure. Ad-
ditionally I've found an error for day 185. The repaired ERP-files will be sub-
mitted as soon as possible.
                                      Joachim Feltens

==============================================================================

From:     joachim feltens 
Subject:  repaired erp-files
          ------------------

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

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

SUBJECT: Repaired ERP-files

Here are the repaired ERP-files for GPS weeks 650 and 651.

 ===============================================================================
 ESA/ESOC Earth Rotation Parameters for Week of 21-27 June 1992
 ===============================================================================
 Field Contents (Value of 0 indicates parameter not available)
   1   MJD of the measurement
   2   x of the pole (")
   3   y of the pole (")
   4   UT1-UTC (s)
   5   uncertainty on x (")
   6   uncertainty on y (")
   7   uncertainty on UT (s)
   8   rms residual of the least squares solution providing the EOP
   9   correlation coefficient : x, y
  10   correlation coefficient : x, UT1
  11   correlation coefficient : y, UT1
  12   number of contributing stations
  13   number of contributing satellites
  14   number of passes
  15   time span covered by the observations used (h)

 ESOC ERP TABLE                                          (1992 Jun 21 - Jun 27)
   MJD       X        Y       UT1-UTC  XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC
  STA SAT PASS TSP
             "        "         sec     "       "      sec
                h
  48794.5 -0.15067  0.35281  0.00000 0.00026 0.00031 0.00000 0.0 0.00 0.00 0.00
   10  17   0  24
  48795.5 -0.14954  0.35653  0.00000 0.00022 0.00023 0.00000 0.0 0.00 0.00 0.00
   11  17   0  24
  48796.5 -0.14998  0.35779  0.00000 0.00023 0.00024 0.00000 0.0 0.00 0.00 0.00
   11  17   0  24
  48797.5 -0.15049  0.35761  0.00000 0.00032 0.00039 0.00000 0.0 0.00 0.00 0.00
   14  17   0  24
  48798.5 -0.14919  0.36247  0.00000 0.00028 0.00036 0.00000 0.0 0.00 0.00 0.00
   13  17   0  24
  48799.5 -0.14664  0.36641  0.00000 0.00026 0.00028 0.00000 0.0 0.00 0.00 0.00
   12  17   0  24
  48800.5 -0.14491  0.36887  0.00000 0.00026 0.00029 0.00000 0.0 0.00 0.00 0.00
   12  17   0  24
 END ERP TABLE
 ===============================================================================
 ==============================================================================
 ESA/ESOC Earth Rotation Parameters for Week of 28 June - 4 July 1992
 ==============================================================================
 Field Contents (Value of 0 indicates parameter not available)
   1   MJD of the measurement
   2   x of the pole (")
   3   y of the pole (")
   4   UT1-UTC (s)
   5   uncertainty on x (")
   6   uncertainty on y (")
   7   uncertainty on UT (s)
   8   rms residual of the least squares solution providing the EOP
   9   correlation coefficient : x, y
  10   correlation coefficient : x, UT1
  11   correlation coefficient : y, UT1
  12   number of contributing stations
  13   number of contributing satellites
  14   number of passes
  15   time span covered by the observations used (h)

 ESOC ERP TABLE                                          (1992 Jun 28 - Jul 04)
   MJD       X        Y       UT1-UTC  XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC
  STA SAT PASS TSP
             "        "         sec     "       "      sec
                h
  48801.5 -0.14312  0.36884  0.00000 0.00031 0.00037 0.00000 0.0 0.00 0.00 0.00
   12  17   0  24
  48802.5 -0.14313  0.37515  0.00000 0.00027 0.00029 0.00000 0.0 0.00 0.00 0.00
   13  17   0  24
  48803.5 -0.14213  0.37665  0.00000 0.00028 0.00031 0.00000 0.0 0.00 0.00 0.00
   12  17   0  24
  48804.5 -0.13983  0.38096  0.00000 0.00037 0.00042 0.00000 0.0 0.00 0.00 0.00
   12  17   0  24
  48805.5 -0.13850  0.38356  0.00000 0.00026 0.00029 0.00000 0.0 0.00 0.00 0.00
   14  17   0  24
  48806.5 -0.13975  0.38618  0.00000 0.00037 0.00042 0.00000 0.0 0.00 0.00 0.00
   13  17   0  24
  48807.5 -0.13696  0.38529  0.00000 0.00037 0.00043 0.00000 0.0 0.00 0.00 0.00
   11  17   0  24
 END ERP TABLE

==============================================================================

From:     joachim feltens
Subject:  esa06527.sum
          ------------

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

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

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

Description of analysis for period 1992 July  5 - 11 (days 187-193,GPS week 652)

1. SOFTWARE USED:   GPSOBS/BAHN5

2. MODELS AND CONSTANTS USED

   a) General:

      - Velocity of Light:              c  = 299792.458  <km/s>
      - Earth Gravitational Constant:   GM = 398600.4415 <km**3/s**2>
      - Mean Equatorial Earth Radius:   Ae =   6378.137  <km>
      - Solid Earth Tidal Love no.:     h  =      0.6090
      - Solid Earth Tidal Shida no.:    l  =      0.0852

   b) Satellite Force Model:

      - Geopotential, GEM-T3 (n = 8, m = 8
                              plus C21 = -0.17e-09 and S21 = 1.19e-09)
      - Solar Third Body Attraction
      - Lunar Third Body Attraction
      - Solid Tides, k2 = 0.300, phi = 0, Wahr frequency dependent corrections
      - Ocean Tides , Schwiderski; n = 6, m = 2, 11 tidal constituents
      - Non-Gravitational:
          Solar Pressure + Thermal Emission: Fliegel et al. (1992),
                                     models T10 for BLOCK I and T20 for BLOCK II
          Y-bias acceleration

      The tracking data of all 17 GPS satellites available at the moment are
      used.

   c) Ground Stations:

      The following table gives an overview over the ground stations,  that have
      been included into the GPS-data processing at ESOC. Except where otherwise
      noted ("remarks"), corrections are taken from IGS Mail No. 33  -  IGS site
      information and coordinates  -  (Boucher and Altamimi).
      __________________________________________________________________________
                          |             |    |    GPS WEEK 652     |
                          |             |    | 1  1  1  1  1  1  1 |
                          |             |    | 8  8  8  9  9  9  9 |
              SITE        |   COUNTRY   |CODE| 7  8  9  0  1  2  3 |  REMARKS
      --------------------|-------------|----|---------------------|------------
        Algonquin         | Canada      |ALGO| F  F  F  F  F  F  F |
        Canberra          | Australia   |CANB| E  E  E  E  E  E  E | Bern
        Penticton         | U.S.A.      |DRAO| E  E  E  E  E  E  E |
        Fairbanks         | U.S.A/Alaska|FAIR| F  F  F  F  F  F  F |
        Goldstone         | U.S.A.      |GOLD| E  E  E  E  E  E  E |
        Herstmonceux      | U.K.        |HERS| ------------------- |
        Kokee Park        | U.S.A/Hawaii|KOKB| E  E  E  E  E  E  E |
        Kourou      (ESA) | French Guaya|KOUR| ------------------- |
        Madrid            | Spain       |MADR| F  F  F  F  F  F  F |
        Maspalomas  (ESA) | Spain/Can.Is|MASP| E  E  E  E  E  E  E |
        Matera            | Italy       |MATE| ------------------- |
        McMurdo           | Antarctica  |MCMU| E  E  E  E  E --- E | IGS Mail 44
        Metsahovi         | Finland     |METS| ------------------- |
        Ny Alesund/Spitzb.| Norway      |NALL| -------------- E -- |
        Onsala            | Norway      |ONSA| ------------------- |
        Pamate/Tahiti     | France      |PAMA| E  E --- E -------- | IGS Mail 44
        Santiago          | Chile       |SANT| ------------------- | IGS Mail 35
        Tai-Shi           | Taiwan      |TAIW| ------------------- | Bern
        Tromsoe           | Norway      |TROM| ------------------- |
        Usuda             | Japan       |USUD| E  E  E  E  E  E  E |
        Wettzell          | Germany     |WETB| ------------------- |
        Yaragadee         | Australia   |YAR1| F  F  F  F  F  F  F |
        Yellowknife       | Canada      |YELL| F  F  F  F  F  F  F |

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

      These coordinates are referred to ITRF91 at epoch 1992.5 (IGS Mail No. 33)

      - Atmospheric modelling is done according to the Willmann-Model

      - Ground Station Receiver Clock Biases are ignored in the evaluations

   d) Earth Rotation Parameters:   IERS Bulletin A, UT1 held fixed

   e) Observations:

      Double differenced carrier phases, ionosphere-free combination.
      Elevation cutoff set to 10 degrees, evaluation of the data on day-by-day
      basis.

3. PARAMETERS TO BE ESTIMATED PER 1-DAY ARC

   a) Satellite Parameters per Spacecraft:
                                 . . .
      - one orbital state X,Y,Z, X,Y,Z at start epoch
      - one scaling factor for solar pressure T10 or T20 model
      - one Y-bias acceleration
      - one satellite clock drift parameter

   b) Station related parameters per ground station:

      - ground station position (if marked with an "E" in the table)
      - every 3 hours an atmospheric zenith delay parameter  (Willmann Model)
      - DD-phase ambiguities as real-valued parameters (at least one for each
        observable double difference combination,  additional parameters  for
        cycle slips)

   c) Earth Rotation Parameters:

      - one pair of pole coordinates xp and yp per day

4. PARAMETERS TO BE KEPT FIXED IN THE SOLUTION

   a) Satellite Parameters per Spacecraft:

      - solar pressure scaling factor GX and GZ in spacecraft body fixed x- and
        z-axis are kept fixed with value 1.0

   b) Station related parameters per Ground Station:

      - ground station position (if marked with an "F" in the table)

5. PRODUCTS GENERATED

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

   ESA06527.EPH   - Precise GPS orbits for week 651 in NGS-format
   ESA06527.ERP   - Earth rotation results for week beginning 1992 June 28
   ESA06527.SUM   - The name of this text file

==============================================================================

From:     Martin Hendy
Subject:  Orroral gps receiver
          --------------------

                                ====================
				ORRORAL GPS RECEIVER
				====================

The Orroral pcode Ashtech receiver ceased operation on day 199. Since that
time a codeless dual frequency Trimble 4000 SST has been in operation at
Orroral.

The intention is to have the pcode Ashtech back at Orroral as soon as 
possible, though this will not be before the end of Epoch 92.

Regards
Martin Hendy
AUSLIG

==============================================================================

From:    Miranda Chin/CIGNET Information Center
Subject: Rogue at Richmond, FL.
         ----------------------

On July 15, JPL installed a 'big' Rogue at the Richmond Naval Observatory
Time Service Alternate Station. 

Antenna location: 7295-1988 NGS Mobile Laser survey marker
Antenna height  : 0.163m from the survey marker to the top of chokering or,
                  0.094m from the survey marker to the bottom of the chokering.
Dome number     : 40499M002

Survey tie: The following information was provided by Bendix Field Engineering
            Corp. 

Station    Dome #              X            Y               Z
---------- ---------      -----------   ------------    -----------
TIMER 1962 40499M001      961318.596    -5674058.202    2740564.814

7295-1988  40499M002      961319.752    -5674094.341    2740490.676