Subject: [IGSMAIL-108] esa06627.sum
From: Joachim Feltens
Date: 29 SEP 1992 17:14:38

***********************************************************************
IGS Electronic Mail       29-SEP-1992 17:14:38       Message Number 108
***********************************************************************
 
==============================================================================
                   THIS FILE CONTAINS  5 MESSAGES
==============================================================================

From:     Joachim Feltens 
Subject:  esa06627.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 September 13 - 19

 *******************************************************************************
 During the weekends  of days 256 to 258 (Sept. 12 - 14) and of  days 263 to 265
 (Sept. 19 - 21) anti-spoofing  has been switched on.  Nevertheless  data of all
 18 satellites has been  processed, and the  orbits of all  GPS-spacecrafts have
 been improved.
 *******************************************************************************
 Beginning  with  August 18 (day 231, 9th week), we are evaluating 30-hour-arcs,
 starting 3 hours before the beginning of the  considered day and ending 3 hours
 after the end of the considered day. In this  way we are getting an  overlap of
 6 hours between two successive days:

  21h         0h                       24h         3h
   |--3hours--|---------24hours---------|--3hours--|
                             |--3hours--|---------24hours---------|--3hours--|
                            21h         0h                       24h         3h

 From such a 30-hour-arc,  the part covering  0h to 23h45m  is sent to CDDIS, as
 usual.
 *******************************************************************************

1. SOFTWARE USED:   GPSOBS/BAHN5

2. MODELS AND CONSTANTS USED

   a) General:                 no changes with respect to previous runs

   b) Satellite Force Model:   no changes with respect to previous runs

      The following table gives an overview over the satellites that have been
      used for the different one-day-arc solutions:     "+" used, "-" not used.
      __________________________________________________________________________
      PRN02| 03| 11| 12| 13| 14| 15| 16| 17| 18| 19| 20| 21| 23| 24| 25| 26| 28|
      ____-|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
      DAY| |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
      257|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      258|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      259|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      260|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      261|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      262|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      263|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |

   c) Ground Stations (if being estimated, one position (X,Y,Z) every day):

      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. 90  -  IGS site
      information and coordinates,updated version of IERS/IGS Tables in IGS Mail
      No. 65  -  (Boucher and Altamimi).
      __________________________________________________________________________
                          |             |    |    GPS WEEK 662     |
                          |             |    | 2  2  2  2  2  2  2 |
                          |             |    | 5  5  5  6  6  6  6 |
              SITE        |   COUNTRY   |CODE| 7  8  9  0  1  2  3 |  REMARKS
      --------------------|-------------|----|---------------------|------------
        Algonquin         | Canada      |ALGO| F  F ------ F  F  F |
        CANB/Tidbinbilla  | Australia   |TIDB| e  e  e  e  e  e  e |
        Penticton         | Canada      |DRAO| F  F  F  F  F  F  F |
        Fairbanks         | U.S.A/Alaska|FAIR| F  F  F  F  F  F  F |
        Goldstone         | U.S.A.      |GOLD| F  F  F  F  F  F  F |
        Hartebeesthoek    | South Africa|HART| F  F  F  F  F  F  F |
        Herstmonceux      | U.K.        |HERS| F ------ F  F  F  F |
        Kokee Park        | U.S.A/Hawaii|KOKB| --------------------|
        Kourou      (ESA) | French Guyan|KOUR| ------------------- | own estim.
        Madrid            | Spain       |MADR| F  F  F  F  F  F  F |
        Maspalomas  (ESA) | Spain/Can.Is|MASP| e ------ e  e  e  e |
        Matera            | Italy       |MATE| F  F  F  F  F  F  F |
        McMurdo           | Antarctica  |MCMU| e  e  e  e  e  e  e |
        Metsahovi         | Finland     |METS| -- F  F  F  F  F  F |
        Ny Alesund/Spitzb.| Norway      |NYAL| e  e  e  e  e  e -- |
        Onsala            | Sweden      |ONSA| F  F  F  F  F  F  F |
        Pamate/Tahiti     | France      |PAMA| -- e  e  e  e ----- |
        St.Johns, NF      | Canada      |STJO| ----- e  e ------ e |
        Santiago          | Chile       |SANT| F  F  F  F  F  F  F |
        Tai-Shi           | Taiwan      |TAIW| ----- e  e  e  e -- |
        Usuda             | Japan       |USUD| e  e  e  e  e  e  e |
        Wettzell          | Germany     |WETT| F  F  F  F  F  F -- |
        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.

      For Kokee Park we had no GPS-data during the whole 13th week.
        Since  we had  no data  for Algonquin on days 259 and 260, we  included
      St.Johns (Newfoundland) in our  set of  ground stations. We  try to  keep
      St.Johns in the future, independently  whether or  not we have Algonqiun-
      data.
      The swedish station Onsala we will keep fixed in the future.

   d) Earth Rotation Parameters:   no changes with respect to previous runs

   e) Observations:                no changes with respect to previous runs

3. PARAMETERS TO BE ESTIMATED PER 1-DAY ARC

   a) Satellite Parameters per Spacecraft:

      From week 661 on, the satellite clock drift parameter is ignored.  Con-
      cering the other satellite parameters,  there are no changes  with respect
                                                                to previous runs

   b) Station related parameters per ground station:  no changes with respect to
                                                                   previous runs
   c) Earth Rotation Parameters:              no changes with respect to
                                                                   previous runs
4. PARAMETERS TO BE KEPT FIXED IN THE SOLUTION

   a) Satellite Parameters per Spacecraft:    no changes with respect to
                                                                   previous runs

   b) Station related parameters per Ground Station:  no changes with respect to
                                                                   previous runs
5. PRODUCTS GENERATED

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

   ESA06620.EPH   - Precise GPS orbits for day 257 (September 13)
   ESA06621.EPH   - Precise GPS orbits for day 258 (September 14)
   ESA06622.EPH   - Precise GPS orbits for day 259 (September 15)
   ESA06623.EPH   - Precise GPS orbits for day 260 (September 16)
   ESA06624.EPH   - Precise GPS orbits for day 261 (September 17)
   ESA06625.EPH   - Precise GPS orbits for day 262 (September 18)
   ESA06626.EPH   - Precise GPS orbits for day 263 (September 19)
   ESA06627.ERP   - Earth rotation results for week beginning 1992 September 13
   ESA06627.SUM   - The name of this text file

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

From:     Ch. Reigber
Subject:  Processing Center 040-GFZ
          -------------------------

Report for GPS Week 661 (Days 250-256) from GFZ
===============================================

This report is generated by the GeoForschungsZentrum Potsdam (GFZ) 
on a weekly basis for the International GPS Geodynamics Service (IGS). 

PRODUCT SUMMARY 

   GFZ0661*.EPH:  GPS ephemerides for GPS Week 661 (SP3 format, pos. and vel.)
                  * represents: 0 for Sunday, .... , 5 for Friday
   GFZ06617.ERP:  Earth rotation parameter (UT1 corrections are not included)
   GFZ06617.CLK:  ST and SV clock parameters of each observation epoch (the
                  maser-based clock at Fairbanks is taken as reference clock)
   GFZ06617.SUM:  Summary file for reporting week 

The above specified products are available at CDDIS. The ERP results are 
submitted additional to IERS Central Bureau and IERS Sub Bureau for Rapid
Service and Predictions.

*********************************************************************************
Note: Due to AS all product files do not include the day 256,
      in the orbit file GFZ06613.EPH (day 253) satellite 3 
      is eliminated because of large overlap differences (30 to 50 m)
*********************************************************************************

CORE STATION SUMMARY

The Core Station data used in the solutions is given below.  

                                      Day of Week 661
                                    S  M  T  W  T  F
                                    U  O  U  E  H  R
        Site                        N  N  E  D  U  I
Name            Code      
------------------------------------------------------
Algonquin       ALGO                X  X  X  X  X  X
Fairbanks       FAIR                X  X  X  X  X  X
Goldstone       DS10                X  X  X  X  X  X
Hartebeesthoek  HART                X  X  X  X  X  X
Kokee Park      KOKR                X  X  X  X  X  X
Mc Murdo        MCMU                X  X  X  X  X  X
Ny-Alesund      NALL                X  X  X  X  X  X
Pamatai         PAMA                X  X  X  X  X  X
Santiago        SANT                X  X  X  X  X  X
Tai Shi         TAIW                X  X  X  X  X  X	
Tidbinbilla     TIDB                X  X  X  X  X  X 
Tromsoe         TROM                X  X  X  X  X  X 
Usuda           USUD                X  X  X  X  X  X
Wettzell        WTZ1                X  X  X  X  X  X
Yellowknife     YELL                X  X  X  X  X  X
Yarragadee      YAR1                X  X  X  X  X  X
------------------------------------------------------

SOLUTION CHARACTERISTICS

1. Analysis Center: GFZ/DLR
2. Analysing Team: D. Angermann, R. Galas, Ch. Reigber,
                   W. Sommerfeld, S.Y. Zhu 
3. Solution Identifier: EPH(GFZ)92G01-DDD
                        ERP(GFZ)92G02-DDD
                        CLK(GFZ)92G01-DDD (only relative)
4. Software used: GEPARD4.0
5. Defintion of Terrestrial Reference Frame
   Origin: Nominally ITRF-90
   Orientation: Nominally ITRF-90
   Reference Epoch: 1992.352 (MJD 48750)
   Fixed set of stations: Y. Bock Solution (IGS Message No.56)
   ALGO, YELL, FAIR, KOKR, TROM, WTZ1, YAR1, PAMA,
   MCMU, TAIW, DS10, SANT, HART
6. Data used:
   - undifferenced pseudo ranges and carrier phases
   - 1-day arc solutions 
7. Adjusted parameters:
   - State vector of all GPS satellites
   - Daily polar motion
   - Coordinate corrections for non-fixed stations
   - Troposheric zenith path delay 
   - Solar radiation scale and y-bias 
   - Ambiguities
   - ST and SV clock parameters of each observation epoch (the 
     maser-based clock at Fairbanks is taken as reference clock)

SOLUTION STATISTICS

                         Arc No.      0     1     2     3     4     5    
   ------------------------------------------------------------------
   Observation Interval [sec]       360   360   360   360   360   360
   Number of observations         22402 24414 21114 22695 23528 24782 
   RMS of carrier phases [cm]       0.8   0.9   0.8   0.9   1.1   0.9 
   RMS of code measurements [cm]   47.0  48.1  46.2  49.3  55.9  48.2 
   ------------------------------------------------------------------

-  GFZ06617.ERP
   ============

   Solution identifier for ERP-Results:
   * GPS week 650-653:   ERP(GFZ)92G01-DDD 
   * since GPS week 654: ERP(GFZ)92G02-DDD
   Please notice, that these two solutions are related to
   different reference frames.
    
   MJD      x    sigmax    y    sigmay

 48871.5 0.0005 0.0004 0.5046 0.0004
 48872.5 0.0041 0.0003 0.5054 0.0003
 48873.5 0.0067 0.0004 0.5078 0.0004
 48874.5 0.0090 0.0003 0.5067 0.0003
 48875.5 0.0098 0.0004 0.5072 0.0004
 48876.5 0.0140 0.0003 0.5080 0.0003

-  GFZ06617.CLK
   ============
   
   The clock parameter file is avaibable at CDDIS.
   The format of this file is described in the
   IGS Message No. 55.

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

From:     Dennis McCarthy
Subject:  GPS Earth Orientation Data
          --------------------------

Subject:  Preliminary look at GPS Earth orientation
Date:     28 September 1992
          -----------------------------------------

An updated look at Earth orientation data submitted to the IERS
follows.  Units are milliseconds of arc for x and y, and
milliseconds of time for UT1-UTC.

Contributor Data Span Points       Mean          Standard Deviation
                                (NEOS-GPS)  
                              x     y   UT1-UTC   x     y   UT1-UTC
U. of Texas  48794.5    62  -0.78 -2.50          1.29  1.92  
             -48863.5

Scripps      48780.5   103  -1.08 -1.60          0.78  0.59
             -48883.5     

U. of Berne  48792.5     8  -1.07  1.23  -0.28   1.51  1.92  0.13 
 (ITRF90)    -48799.5

U. of Berne  48800.5    78  -0.45  0.19  -1.96   0.80  0.92  1.01 
(ITRF91)    -48877.5

JPL          48794.5    75  -1.19 -0.09          0.68  0.90 
             -48876.5

GFZ          48795.0    79  -2.28 -1.81          1.17  1.21
             -488760.5

ESOC         48794.5    91  -1.64  0.36          1.38  2.13
             -48884.5

EMR          48838.5    32  -0.69 -1.44          1.53  0.87
             -48883.5

Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  [email-masked]

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

From:      James F. Zumberge
Subject :  JPL analysis report
           -------------------

Submitted by

J F Zumberge, G Blewitt, M B Heflin, D C Jefferson, F H Webb

all at the Jet Propulsion Laboratory, California Institute of Technology, 
Pasadena, CA  91109.

The following files have been posted on BODHI (for access to BODHI contact
[email-masked]):

______________________________________________________________________________
filename               contents
______________________________________________________________________________
jpl06627.sum           This text file.
jpl06627.erp           Earth rotation parameters for GPS week 662.
jpl06627.sp1           GPS ephemerides for GPS week 662, sp1 format.
jpl06627.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

A-S testing occurred during "12 Sep 92 0100 UT to 14 Sep 92 1000 UT" and 
"19 Sep 92 0100 UT to 21 Sep 92 1000 UT", according to the file 
pub/gps/gpstd.txt obtained from tycho.usno.navy.mil. Results for Sunday,
Sep 13, and Saturday, Sep 19, are not included in this submission. The
results for Monday, Sep 14, exclude data from Block-II satellites
acquired when A-S was on.  (This explains the larger-than-normal formal
errors of LODR and polar motion parameters for that day.)

WARNING:

JPL LODR TABLE                               GPS week 662 (1992 Sep 14 - Sep 18)
  MJD       LODR     +/-
          (ms/day)
 48879.5    1.86     0.12
 48880.5    1.88     0.07
 48881.5    1.78     0.07
 48882.5    2.08     0.07
 48883.5    2.20     0.07
END LODR TABLE

NOTE: In the following table, UT1R-UTC are the assumed nominal values from
IERS Bulletin-B predicts; estimated LODR values are given in the previous
table. See IGS Mail Message 97 for details.

JPL UTPM TABLE                               GPS week 662 (1992 Sep 14 - Sep 18)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 48879.5   .01886   .50546   .32069  .00060  .00060  .00000  .0 -.12  .00  .00  24 18  0
 48880.5   .02169   .50774   .31873  .00023  .00027  .00000  .0 -.01  .00  .00  25 18  0
 48881.5   .02352   .50742   .31676  .00021  .00024  .00000  .0  .01  .00  .00  25 18  0
 48882.5   .02634   .50747   .31477  .00022  .00024  .00000  .0  .05  .00  .00  24 18  0
 48883.5   .02819   .50799   .31278  .00022  .00024  .00000  .0  .07  .00  .00  26 18  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 662:

JPL ORBIT REPEATABILITY TABLE                GPS week 662 (1992 Sep 14 - Sep 18)
                 92  9 14   92  9 15   92  9 16   92  9 17   92  9 18
prn    rms (m)
  2                  1.2        1.52       1.28       1.97       0.8 
  3                  1.0        1.24       1.68       1.47       1.6 
 11                  1.0        2.16       1.03       1.18       1.1 
 12                  2.4        1.63       0.78       1.15       1.1 
 13                  2.0        1.41       1.68       1.74       3.8 
 14                  1.2        2.32       1.15       0.85       0.9 
 15                  2.2        1.38       0.87       1.36       1.9 
 16                  3.2        2.25       4.41       2.57       2.2 
 17                  2.0        1.97       1.25       0.95       1.4 
 18                  1.3        0.56       1.07       0.59       1.4 
 19                  2.2        1.17       1.09       0.89       1.4 
 20                  1.8        1.61       1.88       1.44       2.8 
 21                  1.5        0.93       0.63       0.82       0.4 
 23                  0.9        1.46       0.95       1.07       0.6 
 24                  2.9        2.98       2.82       2.27       2.6 
 25                  2.9        1.48       1.60       1.83       2.0 
 26                  1.3        1.68       1.16       1.72       0.6 
 28                  1.9        1.52       0.58       1.07       0.4 
END ORBIT REPEATABILITY TABLE

As described in IGS Mail Message 37, the following table compares the JPL
precise ephemerides with those from the broadcast ephemeris:

JPL COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
                 92  9 14   92  9 15   92  9 16   92  9 17   92  9 18
prn    rms (m)
  2                  8.2        9.2       10.8       11.8       10.6 
  3                 13.3        8.2       12.9       19.4       13.6 
 11                  5.6        8.4        7.7        4.8        4.3 
 12                  9.1       16.0        9.2        6.5        5.8 
 13                  6.7        5.9       10.1       11.0        7.02
 14                  7.6        8.8        8.3        9.1        5.7 
 15                  4.1        5.7        5.7        5.2        4.4 
 16                 10.1       11.9       12.4       12.7       12.0 
 17                  8.3        5.5        5.9        9.0        7.0 
 18                  8.5        9.5       10.2        9.5       10.5 
 19                  3.9        3.6        3.4        3.8        4.6 
 20                  8.7        9.2       13.5       13.0       11.3 
 21                  8.2        9.0       10.4        8.6       13.4 
 23                  9.0        8.0        3.0       11.5        4.0 
 24                 13.5       12.4       11.4       14.9       11.7 
 25                  6.3        6.9        7.3        8.7       10.3 
 26                 11.4        9.6        9.5        8.6        9.2 
 28                  5.1        3.5        3.4        2.8        3.0 
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

The following table, as explained in IGS Mail Message 91, indicates which
tracking sites were used in this week's analysis:

JPL GROUND STATION INCLUSION TABLE           GPS week 662 (1992 Sep 14 - Sep 18)
                 92  9 14   92  9 15   92  9 16   92  9 17   92  9 18

ALBH                 X          X          X          X          X
ALGO*                X          X          X          X          X
FAIR*                X          X          X          X          X
GOLD                 X          X          X          X          X
HART*                X          X          X          X          X
HERS                            X          X          X          X
JPLM                 X          X          X          X          X
KOSG                 X          X          X          X          X
MADR*                X          X          X          X          X
MASP                            X          X                     X
MATE                 X          X          X          X          X
MCMU                 X          X          X          X          X
METS                 X          X          X          X          X
NYAL                 X          X          X          X          X
ONSA                 X          X          X          X          X
PAMA                 X          X          X          X          X
PENT                 X          X          X          X          X
SANT*                X          X          X          X          X
STJO                 X          X          X          X          X
TAIW                 X          X          X          X          X
TIDB                 X          X          X          X          X
TROM*                X                                           X
USUD                 X          X          X          X          X
WETT                 X          X          X          X          X
YAR1*                X          X          X          X          X
YELL                 X          X          X          X          X
_______________________
*Indicates fiducial site.
END GROUND STATION INCLUSION TABLE

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

From:      Ruth E. Neilan, JPL
Subject:   IGS ABSTRACTS FOR THE FALL AGU
           ------------------------------

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

SPECIAL IGS/SEARCH SESSION AT THE AGU

A FEW ABSTRACTS SUBMITTED TO THIS SESSION 
APPEARED TO HAVE BEEN "LOST" IN THE SYSTEM; 
HOPEFULLY WE HAVE CAUGHT THEM ALL.  HOWEVER AS A 
CHECK, PLEASE FAX TO JEAN DICKEY AT JPL: (818-393-
6890) ANY SUBMITTED ABSTRACTS IN ORDER TO VERIFY 
THIS.

TIME IS IMPORTANT.  --- PLEASE FAX ASAP (EOD 9.29.92) !!!!!

THANK YOU FOR YOUR CONSIDERATION,

JEAN DICKEY