Subject: [IGSMAIL-112] IGS status report no. 6
From: Gerhard Beutler
Date: 5 OCT 1992 16:00:18

***********************************************************************
IGS Electronic Mail        5-OCT-1992 16:00:40       Message Number 112
***********************************************************************
 
==============================================================================
                   THIS FILE CONTAINS 5 MESSAGES
==============================================================================

From:    Gerhard Beutler
Subject: IGS status report no. 6
         -----------------------

IGS Status Report, October 3, 1992
__________________________________

General Remarks :

 - It is good to see that after 23 September 1992

    - the observations of the entire core network cotinue to
      flow into the three network centers CDDIS, IGN, and SIO,
    - the analysis centers continue their analyses,
    - the USNO and the IERS Central Bureau continue
      with their contributions

   This gives us the opportunity to discuss and define the status of the
   IGS work between November 1992 and the start of the official service
   at the IGS oversight committee meeting immediately after the end
   of the DOSE meeting.

 - I would like to thank all participants for their support. I know
   that I was asking for a lot of work and goodwill !

 - I was asked by Bruce Bills to chair the IGS session at the Dose
   meeting. I would like to thank him to give the IGS oversight
   committee the opportunity to present this status report of the IGS
   work at the Dose meeting. The fact that an entire session was
   scheduled for IGS at the DOSE meeting underlines the importance
   of our work for the geodynamic research.

 - Below you find the tentative schedules for the IGS information
   session at the DOSE meeting and for the 3rd IGS oversight committee
   meeting on 15 October (afternoon) and 16 October 1992.

 - I will be at the Potsdam meeting from 5-10 October. Werner Gurtner
   will check my e-mail and contact me and/or Carey Noll if there are
   problems in connection with the two events scheduled below.

Schedules
_________

IGS Session at the DOSE Meeting Thursday morning, 15 October 1992
_________________________________________________________________

As you can see below, there is almost no time left for additional oral
presentations.  Nevertheless I would be most interested to see more
contributions from the user community as POSTER presentations.  The
posters will be in the meeting room.  Depending on the number of
posters, we will try to find some time (3-5 minutes) for a short oral
introduction to the poster.

_____________________________________________________________________
Topic                         Presentation/Authors        Time slot
_____________________________________________________________________

Chronicle of Events           Gerhard Beutler              15 min
                              Ruth Neilan
Analysis Center Coordination  Clyde Goad                   15 min
IGS Products analyzed by      Martine Feissel              15 min
the IERS Central Bureau
IGS and the IERS Rapid        Dennis McCarthy              15 min
Service
The IGN Network Centers       Carey Noll                   15 min
Processing Center             CSR, CODE, ESOC, JPL, GFZ,   10 min  *)
Summaries                     SIO, and EMR
VLBI Activities related to    Tom Clark                    15 min
IGS (Intensive Campaign etc)
SEARCH Campaign               Jean Dickey                  10 min
_____________________________________________________________________
Total                                                     170 min
_____________________________________________________________________

*) In addition to the oral presentation I would like to invite all
   processing centers to prepare a poster highlighting their
   activities.

   There will be other poster presentations, one was already announced
   by Hiromichi Tsuji from GSI, Japan:

        Title:          Evaluation of Accuracy of GSI's Ephemerides for
                        GPS Satellites by Direct Comparison of Orbits
        Authors:        Y.Hatanaka and H.Tsuji, GSI, Japan
        Sessions:       IGS results
        Format:         Poster

Tentative Schedule
__________________

IGS Oversight Committee Meeting 15/16 October 1992
--------------------------------------------------

Thursday Afternoon
__________________

 - Plenary Session :

   14:30 - 17:00 :

   - Introduction by G. Beutler (10 min)

   - Working Group Reports (Summary of past three months, suggestions
                            for future work, 5-10 min each):

      - Standards GPS Data Exchange/Communications : W. Gurtner
      - Communications                               P. Morgan
      - Analysis Center Coordinator                : C. Goad
      - Stations/data acquisition/the AS problem   : JPL
      - Reference frame issues                     : Claude Boucher
      - Epoch'92                                   : B. Minster

     Discussion. Establish new working groups, e.g. one dealing with
     the use of IGS products ?

   - Political Issues :                              I. Mueller
                                                     G. Beutler
       - IGS work between Nov. 92 and start of
         official service
       - Agenda for writing the proposal to IAG
       - IERS call for participation (should IGS
         answer the CFP or not ?)

     Discussion.

Friday
______

 08:30 - 12:00 Working Group Meetings

 - Analysis Center Coordination                        C. Goad
 - Reference Frame                                     C. Boucher
 - Data Management                                     P. Morgan
                                                       W. Gurtner
 - Stations/ Data Acquisition  +                       JPL
   handling of AS data by CORE receivers
 - "Politics"                                          I. Mueller
                                                       G. Beutler
14:00 - 15:30 Final Meeting

 - Working Group Reports
 - Decision concerning official status of future
   work

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

From:    J.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
______________________________________________________________________________
jpl06637.sum           This text file.
jpl06637.erp           Earth rotation parameters for GPS week 663.
jpl06637.sp1           GPS ephemerides for GPS week 663, sp1 format.
jpl06637.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

A-S testing occurred during "19 Sep 92 0100 UT to 21 Sep 92 1000 UT" and
"26 Sep 92 0100 UT to 28 Sep 92 1000 UT", according to the file
pub/gps/gpstd.txt obtained from tycho.usno.navy.mil. Results for Sunday,
Sep 20, and Saturday, Sep 26, are not included in this submission. The
results for Monday, Sep 21, 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: No warnings for GPS week 663.

JPL LODR TABLE                               GPS week 663 (1992 Sep 21 - Sep 25)
  MJD       LODR     +/-
          (ms/day)
 48886.5    2.56     0.14
 48887.5    1.81     0.08
 48888.5    1.97     0.07
 48889.5    2.01     0.07
 48890.5    2.05     0.08
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 663 (1992 Sep 21 - Sep 25)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 48886.5   .03672   .50538   .30673  .00074  .00075  .00000  .0  .08  .00  .00  22 18  0
 48887.5   .03741   .50693   .30469  .00027  .00026  .00000  .0 -.05  .00  .00  24 18  0
 48888.5   .03963   .50752   .30265  .00023  .00025  .00000  .0 -.05  .00  .00  25 18  0
 48889.5   .04222   .50723   .30059  .00023  .00024  .00000  .0 -.01  .00  .00  23 18  0
 48890.5   .04384   .50634   .29852  .00030  .00031  .00000  .0 -.01  .00  .00  23 18  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 663:

JPL ORBIT REPEATABILITY TABLE                GPS week 663 (1992 Sep 21 - Sep 25)
                 92  9 21   92  9 22   92  9 23   92  9 24   92  9 25
prn    rms (m)
  2                  2.0        2.02       0.94       0.71       0.9 
  3                  3.1        1.35       1.53       2.58       2.7 
 11                  0.6        0.51       0.85       0.55       0.6 
 12                  3.5        1.73       0.78       0.67       0.6 
 13                  1.4        2.73       2.54       1.06       0.6 
 14                  0.7        1.74       0.80       0.50       1.2 
 15                  1.5        1.56       0.61       0.66       1.3 
 16                  1.1        2.81       1.05       1.53       1.1 
 17                  1.6        2.21       0.83       2.38       2.1 
 18                  1.6        1.23       0.68       0.58       1.0 
 19                  0.5        0.85       0.66       0.19       1.2 
 20                  2.7        3.22       1.69       1.63       1.7 
 21                  1.6        4.49       0.97       1.68       1.5 
 23                  0.5        0.85       1.10       1.15       0.7 
 24                  2.9        1.75       2.34       1.25       0.4 
 25                  1.4        0.56       1.85       2.84       1.3 
 26                  0.8        1.22       1.58       0.56       0.7 
 28                  1.5        1.59       0.97       1.62       0.9 
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 21   92  9 22   92  9 23   92  9 24   92  9 25
prn    rms (m)
  2                 11.6       13.7       12.7        8.9        7.6 
  3                 13.2       13.8       13.6       11.3       15.2 
 11                  3.0        3.2        4.4        4.7        5.9 
 12                  7.7        4.85       4.7       10.9       10.6 
 13                  7.2        7.0        6.6        6.30       7.2 
 14                  5.4        5.1        5.9        5.9        6.8 
 15                  4.9        8.0        7.2        7.8        9.4 
 16                  9.8        9.6        8.6        8.7        8.8 
 17                  9.3        4.6        5.9        5.6        5.7 
 18                  6.1        7.1        6.2        6.7        6.4 
 19                  6.7        5.5        5.3        5.3        6.5 
 20                  8.7        5.8        4.6        6.7        5.6 
 21                 10.5        5.9        8.5        7.6       10.2 
 23                  8.6        4.2       10.8        6.3       10.8 
 24                 14.5       13.8       12.2       11.2        8.2 
 25                  9.5        8.5        8.6        7.1        5.1 
 26                  8.2        7.2        8.9       10.8        9.4 
 28                  3.4        3.4        2.8        3.0        3.4 
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 663 (1992 Sep 21 - Sep 25)
                 92  9 21   92  9 22   92  9 23   92  9 24   92  9 25           

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           
HERS                 X          X          X          X          X           
JPLM                 X          X          X          X          X           
KOSG                 X          X          X          X          X           
MADR*                           X          X          X          X           
MATE                 X          X          X          X          X           
MCMU                 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                      
STJO                 X          X          X          X          X           
TAIW                 X          X          X                     X           
TIDB                 X          X          X          X          X           
TROM*                X          X          X          X          X           
USUD                 X          X          X          X          X           
WETT                            X          X                     X           
YAR1*                           X          X          X          X           
YELL                 X          X          X          X          X           
_______________________
*Indicates fiducial site.
END GROUND STATION INCLUSION TABLE

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

From:    Ch. Reigber
Subject: GFZ analysis report
         -------------------

Report for GPS Week 662 (Days 257-263) from GFZ
===============================================

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

PRODUCT SUMMARY 

   GFZ0662*.EPH:  GPS ephemerides for GPS Week 662 (SP3 format, pos. and vel.)
                  * represents: 2 for Tuesday, .... , 5 for Friday
   GFZ06627.ERP:  Earth rotation parameter (UT1 corrections are not included)
   GFZ06627.CLK:  ST and SV clock parameters of each observation epoch (the
                  maser-based clock at Fairbanks is taken as reference clock)
   GFZ06627.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 days 257, 258
      and 263
*********************************************************************************

CORE STATION SUMMARY

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

                                      Day of Week 662
                                     T  W  T  F
                                     U  E  H  R
        Site                         E  D  U  I
Name            Code      
-------------------------------------------------
Algonquin       ALGO                 -  X  X  X
Fairbanks       FAIR                 X  X  X  X
Goldstone       DS10                 X  X  X  X
Hartebeesthoek  HART                 X  X  X  X
Kokee Park      KOKR                 -  -  -  -
Mc Murdo        MCMU                 X  X  X  X
Ny-Alesund      NALL                 X  X  X  X
Pamatai         PAMA                 X  X  X  X
Santiago        SANT                 X  X  X  X
Tai Shi         TAIW                 X  X  X  X	
Tidbinbilla     TIDB                 X  X  X  X 
Tromsoe         TROM                 -  -  -  X 
Usuda           USUD                 X  X  X  X
Wettzell        WTZ1                 X  X  X  X
Yellowknife     YELL                 X  X  X  X
Yarragadee      YAR1                 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.      2     3     4     5    
   ------------------------------------------------------
   Observation Interval [sec]       360   360   360   360
   Number of observations         16330 12795 19395 18813 
   RMS of carrier phases [cm]       0.6   0.5   0.7   0.7 
   RMS of code measurements [cm]   45.9  50.5  50.1  50.6 
   ------------------------------------------------------

-  GFZ06627.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

 48880.5 0.0230 0.0006 0.5117 0.0007
 48881.5 0.0252 0.0008 0.5111 0.0008
 48882.5 0.0288 0.0004 0.5101 0.0004
 48883.5 0.0298 0.0004 0.5117 0.0005

-  GFZ06627.CLK
   ============
   
   The clock parameter file is avaibable at CDDIS.
   The format of this file is described in the
   IGS Message No. 55.

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

From:    Yehuda Bock
Subject: SIO analysis report
         -------------------

SIO PGGA/GARNER Analysis Center Results (03 Oct. 1992)

Yehuda Bock, Peng Fang and Keith Stark

This week we include the following information:

Polar motion results for 19 to 25 Sept. (excluding 20 Sept.) 

Notes:

(1) AS effects polar motion estimates on 19, 21 Sept.
(2) No solution for 20 Sept. Only a few useable satellites
(feedback on this day would be appreciated from other
analysis centers)
(3) Coordinates/Reference Frame used for tracking stations described 
in results of 24 Sept. 1992

Solution 921003
* MIT_TO_IERS: Run on 1992/10/ 3 11:17
* Input file : pmu100392.mit
 48780.5  -0.15613  0.32205 -0.519883  0.00021 0.00021 0.000000 1.96  0.109  0.000  0.000   21  16 0
 48781.5  -0.15372  0.32385 -0.522617  0.00027 0.00025 0.000000 1.46  0.046  0.000  0.000   21  17 0
 48782.5  -0.15455  0.32543 -0.525143  0.00026 0.00023 0.000000 1.29  0.117  0.000  0.000   21  17 0
 48783.5  -0.15467  0.32866 -0.527309  0.00020 0.00020 0.000000 1.81 -0.010  0.000  0.000   21  17 0
 48784.5  -0.15518  0.33080 -0.529055  0.00027 0.00024 0.000000 1.41  0.080  0.000  0.000   22  17 0
 48785.5  -0.15367  0.33296 -0.530225  0.00023 0.00022 0.000000 1.43  0.000  0.000  0.000   22  17 0
 48786.5  -0.15379  0.33598 -0.531264  0.00023 0.00022 0.000000 1.71 -0.024  0.000  0.000   21  17 0
 48787.5  -0.15227  0.33915 -0.532088  0.00037 0.00033 0.000000 1.61 -0.062  0.000  0.000   17  17 0
 48788.5  -0.15204  0.34224 -0.532830  0.00020 0.00022 0.000000 1.49 -0.011  0.000  0.000   21  17 0
 48789.5  -0.15227  0.34537 -0.533614  0.00024 0.00025 0.000000 1.36 -0.040  0.000  0.000   20  17 0
 48790.5  -0.15178  0.34806 -0.534539  0.00025 0.00025 0.000000 1.74 -0.044  0.000  0.000   21  17 0
 48791.5  -0.15268  0.35123 -0.535654  0.00023 0.00024 0.000000 1.81  0.109  0.000  0.000   20  17 0
 48792.5  -0.15185  0.35393 -0.536981  0.00020 0.00019 0.000000 2.28  0.060  0.000  0.000   20  17 0
 48793.5  -0.15265  0.35656 -0.539967  0.00018 0.00019 0.000000 1.59  0.011  0.000  0.000   20  17 0
 48794.5  -0.15107  0.35867 -0.541918  0.00021 0.00021 0.000000 1.37  0.000  0.000  0.000   23  17 0
 48795.5  -0.15069  0.36003 -0.543939  0.00019 0.00020 0.000000 1.93  0.023  0.000  0.000   24  17 0
 48796.5  -0.15002  0.36293 -0.545936  0.00017 0.00018 0.000000 1.61  0.099  0.000  0.000   24  17 0
 48797.5  -0.14923  0.36463 -0.547805  0.00020 0.00023 0.000000 1.90  0.062  0.000  0.000   23  17 0
 48798.5  -0.14700  0.36705 -0.549454  0.00026 0.00025 0.000000 1.40  0.121  0.000  0.000   21  17 0
 48799.5  -0.14700  0.37016 -0.551219  0.00027 0.00028 0.000000 1.34  0.146  0.000  0.000   21  17 0
 48800.5  -0.14457  0.37288 -0.552509  0.00024 0.00024 0.000000 1.34  0.085  0.000  0.000   22  17 0
 48801.5  -0.14404  0.37427 -0.553393  0.00027 0.00028 0.000000 1.18  0.161  0.000  0.000   26  17 0
 48802.5  -0.14297  0.37794 -0.554140  0.00024 0.00027 0.000000 1.40  0.158  0.000  0.000   22  17 0
 48803.5  -0.14154  0.38093 -0.555153  0.00020 0.00025 0.000000 1.89  0.119  0.000  0.000   21  17 0
 48804.5  -0.14111  0.38215  0.443530  0.00016 0.00017 0.000000 2.22  0.129  0.000  0.000   23  17 0
 48805.5  -0.13907  0.38531  0.441782  0.00018 0.00021 0.000000 1.98  0.083  0.000  0.000   22  17 0
 48806.5  -0.13790  0.38707  0.439604  0.00020 0.00023 0.000000 1.53  0.133  0.000  0.000   22  17 0
 48807.5  -0.13686  0.39027  0.437134  0.00021 0.00024 0.000000 1.76  0.096  0.000  0.000   23  16 0
 48808.5  -0.13477  0.39214  0.434606  0.00018 0.00020 0.000000 1.80  0.038  0.000  0.000   24  16 0
 48809.5  -0.13430  0.39393  0.432253  0.00015 0.00017 0.000000 1.30  0.135  0.000  0.000   26  16 0
 48810.5  -0.13189  0.39617  0.430247  0.00017 0.00018 0.000000 1.44  0.057  0.000  0.000   27  16 0
 48811.5  -0.13039  0.39882  0.428660  0.00014 0.00016 0.000000 1.52  0.095  0.000  0.000   27  17 0
 48812.5  -0.12982  0.39996  0.427483  0.00015 0.00018 0.000000 1.84  0.142  0.000  0.000   26  17 0
 48813.5  -0.12806  0.40230  0.427699  0.00021 0.00025 0.000000 2.91  0.277  0.000  0.000   26  16 0
 48814.5  -0.12640  0.40553  0.427271  0.00014 0.00016 0.000000 1.48  0.192  0.000  0.000   28  17 0
 48815.5  -0.12614  0.40898  0.426947  0.00015 0.00020 0.000000 1.57  0.185  0.000  0.000   27  17 0
 48816.5  -0.12504  0.41105  0.426598  0.00014 0.00016 0.000000 1.89  0.164  0.000  0.000   29  17 0
 48817.5  -0.12520  0.41152  0.426111  0.00017 0.00020 0.000000 1.81  0.162  0.000  0.000   28  17 0
 48818.5  -0.12414  0.41383  0.425416  0.00016 0.00017 0.000000 1.74  0.106  0.000  0.000   27  17 0
 48819.5  -0.12285  0.41555  0.424472  0.00017 0.00019 0.000000 1.88  0.113  0.000  0.000   25  17 0
 48820.5  -0.12000  0.41761  0.423296  0.00020 0.00020 0.000000 1.88  0.166  0.000  0.000   24  17 0
 48821.5  -0.11824  0.41878  0.421397  0.00027 0.00028 0.000000 1.96  0.159  0.000  0.000   23  17 0
 48822.5  -0.11542  0.42145  0.419817  0.00021 0.00020 0.000000 1.95  0.137  0.000  0.000   25  17 0
 48823.5  -0.11306  0.42399  0.418199  0.00024 0.00025 0.000000 2.10  0.073  0.000  0.000   24  17 0
 48824.5  -0.10958  0.42682  0.416635  0.00017 0.00019 0.000000 1.95  0.100  0.000  0.000   25  18 0
 48826.5  -0.10646  0.43135  0.414004  0.00013 0.00014 0.000000 1.89  0.062  0.000  0.000   29  18 0
 48827.5  -0.10441  0.43306  0.413023  0.00014 0.00014 0.000000 1.75  0.082  0.000  0.000   27  18 0
 48828.5  -0.10140  0.43504  0.411183  0.00016 0.00017 0.000000 1.73  0.019  0.000  0.000   25  18 0
 48829.5  -0.09985  0.43682  0.410301  0.00016 0.00017 0.000000 1.46  0.045  0.000  0.000   25  18 0
 48830.5  -0.09737  0.43913  0.409336  0.00013 0.00014 0.000000 2.02  0.014  0.000  0.000   26  18 0
 48831.5  -0.09565  0.44142  0.408090  0.00014 0.00015 0.000000 2.03  0.026  0.000  0.000   27  18 0
 48832.5  -0.09406  0.44288  0.406405  0.00016 0.00018 0.000000 2.70  0.119  0.000  0.000   26  18 0
 48833.5  -0.09254  0.44531  0.404186  0.00018 0.00016 0.000000 1.94  0.215  0.000  0.000   26  18 0
 48834.5  -0.08947  0.44698  0.401566  0.00012 0.00013 0.000000 2.10  0.074  0.000  0.000   27  18 0
 48835.5  -0.08915  0.44907  0.398750  0.00046 0.00051 0.000000 1.71  0.179  0.000  0.000   27  18 0
 48836.5  -0.08731  0.45118  0.396020  0.00039 0.00053 0.000000 1.49  0.066  0.000  0.000   27  10 0
 48837.5  -0.08407  0.45239  0.393620  0.00021 0.00025 0.000000 1.68 -0.011  0.000  0.000   29  18 0
 48838.5  -0.08178  0.45588  0.391677  0.00012 0.00012 0.000000 1.59  0.065  0.000  0.000   28  18 0
 48839.5  -0.08006  0.45774  0.390212  0.00012 0.00013 0.000000 1.80  0.114  0.000  0.000   29  18 0
 48840.5  -0.07784  0.45927  0.389148  0.00012 0.00012 0.000000 2.08  0.058  0.000  0.000   29  18 0
 48841.5  -0.07614  0.46140  0.388356  0.00013 0.00014 0.000000 2.04  0.061  0.000  0.000   27  18 0
 48842.5  -0.07490  0.46395  0.387691  0.00047 0.00046 0.000000 1.31  0.259  0.000  0.000   28  17 0
 48843.5  -0.07253  0.46654  0.386999  0.00036 0.00041 0.000000 1.40  0.247  0.000  0.000   26   8 0
 48844.5  -0.07071  0.46924  0.386177  0.00032 0.00027 0.000000 1.54  0.179  0.000  0.000   27  18 0
 48845.5  -0.06831  0.47233  0.385147  0.00017 0.00021 0.000000 1.75  0.172  0.000  0.000   27  18 0
 48846.5  -0.06668  0.47411  0.383853  0.00014 0.00014 0.000000 1.89  0.085  0.000  0.000   27  18 0
 48847.5  -0.06460  0.47653  0.382298  0.00013 0.00013 0.000000 2.09  0.059  0.000  0.000   28  18 0
 48848.5  -0.06236  0.47802  0.379500  0.00013 0.00013 0.000000 1.69  0.069  0.000  0.000   28  18 0
 48849.5  -0.05936  0.47947  0.377556  0.00032 0.00037 0.000000 1.22  0.237  0.000  0.000   28  13 0
 48850.5  -0.05897  0.48090  0.375550  0.00039 0.00042 0.000000 1.46  0.336  0.000  0.000   27   8 0
 48851.5  -0.05523  0.48289  0.373590  0.00020 0.00022 0.000000 2.33  0.028  0.000  0.000   28  18 0
 48852.5  -0.05191  0.48457  0.371746  0.00014 0.00014 0.000000 1.59  0.060  0.000  0.000   27  18 0
 48853.5  -0.04896  0.48645  0.370076  0.00013 0.00014 0.000000 1.82  0.017  0.000  0.000   26  18 0
 48854.5  -0.04626  0.48815  0.368154  0.00016 0.00018 0.000000 1.46  0.031  0.000  0.000   26  15 0
 48855.5  -0.04266  0.48952  0.366832  0.00015 0.00016 0.000000 1.74  0.012  0.000  0.000   26  18 0
 48856.5  -0.03980  0.48984  0.365638  0.00072 0.00065 0.000000 1.09  0.452  0.000  0.000   24   8 0
 48857.5  -0.03521  0.49058  0.364420  0.00033 0.00039 0.000000 1.80  0.168  0.000  0.000   25   8 0
 48858.5  -0.03489  0.49326  0.362988  0.00026 0.00027 0.000000 1.97  0.030  0.000  0.000   23  18 0
 48859.5  -0.03077  0.49355  0.361149  0.00014 0.00015 0.000000 2.01  0.013  0.000  0.000   25  18 0
 48860.5  -0.02731  0.49524  0.358770  0.00013 0.00013 0.000000 2.14  0.043  0.000  0.000   25  18 0
 48861.5  -0.02436  0.49692  0.355865  0.00012 0.00013 0.000000 2.06  0.057  0.000  0.000   24  18 0
 48862.5  -0.02111  0.49866  0.352588  0.00013 0.00013 0.000000 2.17  0.043  0.000  0.000   24  18 0
 48863.5  -0.01849  0.50018  0.338105  0.00012 0.00013 0.000000 2.65  0.048  0.000  0.000   24  18 0
 48864.5  -0.01598  0.50201  0.335804  0.00014 0.00015 0.000000 2.54  0.034  0.000  0.000   25  18 0
 48865.5  -0.01287  0.50382  0.333721  0.00013 0.00014 0.000000 2.33  0.064  0.000  0.000   24  18 0
 48866.5  -0.01087  0.50472  0.331844  0.00013 0.00013 0.000000 2.05  0.033  0.000  0.000   25  18 0
 48867.5  -0.00885  0.50438  0.330108  0.00012 0.00013 0.000000 1.86  0.039  0.000  0.000   25  18 0
 48868.5  -0.00634  0.50419  0.328431  0.00017 0.00020 0.000000 2.06 -0.015  0.000  0.000   23  18 0
 48869.5  -0.00406  0.50364  0.336537  0.00013 0.00014 0.000000 2.02  0.055  0.000  0.000   23  18 0
 48870.5  -0.00220  0.50326  0.335385  0.00017 0.00018 0.000000 1.80  0.062  0.000  0.000   24  18 0
 48871.5   0.00049  0.50501  0.334140  0.00016 0.00016 0.000000 2.24  0.055  0.000  0.000   24  18 0
 48872.5   0.00297  0.50632  0.332702  0.00013 0.00013 0.000000 1.91  0.033  0.000  0.000   25  18 0
 48873.5   0.00528  0.50675  0.331004  0.00013 0.00014 0.000000 1.89  0.021  0.000  0.000   25  18 0
 48874.5   0.00791  0.50757  0.329028  0.00013 0.00014 0.000000 1.82  0.152  0.000  0.000   25  18 0
 48875.5   0.01017  0.50731  0.326801  0.00014 0.00015 0.000000 2.44  0.173  0.000  0.000   25  18 0
 48876.5   0.01201  0.50808  0.324378  0.00019 0.00017 0.000000 1.75  0.153  0.000  0.000   23  18 0
 48877.5   0.01191  0.50898  0.324013  0.00055 0.00053 0.000000 1.62  0.402  0.000  0.000   23  18 0
 48878.5   0.01692  0.50772  0.310577  0.00070 0.00066 0.000000 1.05  0.381  0.000  0.000   24   7 0
 48879.5   0.01704  0.50727  0.308702  0.00047 0.00052 0.000000 1.47  0.302  0.000  0.000   23  18 0
 48880.5   0.02093  0.50943  0.306765  0.00030 0.00024 0.000000 1.33  0.241  0.000  0.000   22  18 0
 48881.5   0.02418  0.50986  0.315922  0.00024 0.00021 0.000000 1.88  0.170  0.000  0.000   23  18 0
 48882.5   0.02751  0.50973  0.314365  0.00021 0.00019 0.000000 2.27  0.054  0.000  0.000   22  18 0
 48883.5   0.02913  0.51001  0.312953  0.00025 0.00021 0.000000 2.14  0.216  0.000  0.000   23  18 0
 48884.5   0.03140  0.50945  0.311800  0.00078 0.00067 0.000000 1.17  0.402  0.000  0.000   22  18 0
 48886.5   0.03533  0.50699  0.308697  0.00070 0.00075 0.000000 1.59  0.363  0.000  0.000   21  18 0
 48887.5   0.03750  0.50860  0.306537  0.00025 0.00021 0.000000 1.85  0.140  0.000  0.000   24  18 0
 48888.5   0.03923  0.50859  0.303852  0.00023 0.00019 0.000000 2.53  0.284  0.000  0.000   24  18 0
 48889.5   0.04154  0.50907  0.300712  0.00022 0.00020 0.000000 2.84  0.065  0.000  0.000   23  18 0
 48890.5   0.04347  0.50960  0.297304  0.00025 0.00020 0.000000 2.46  0.094  0.000  0.000   25  18 0

NOTES: UT1 not estimated.  Value given is apriori used in analysis.  The rms is the square root of chi**2
per degree of freedom in our solution.  It nominally should be 1.0.  st and sv are numbers of stations
and satellites in solution.

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

From:    L. Daniel
Subject: IGN status
         ----------

                     IGN DATA CENTER WEEKLY STATUS                    
                             PRODUCT FILES                            
                    (as of  2-OCT-1992 10:25:22.79)                   
                                                                      
        GPS WEEK #662    13/9/1992 to 19/9/1992   days 257-263        

                              2    2    2    2    2    2    2         
                              5    5    5    6    6    6    6         
Center           Type         7    8    9    0    1    2    3         
---------------  ----------  ---  ---  ---  ---  ---  ---  ---        
COD              EPH          X    X    X    X    X    X    X         
                 ERP          X    X    X    X    X    X    X         
                                                                      
EMR              EPH          X    X    X    X    X    X    X         
                 ERP          X    X    X    X    X    X    X         
                 SUM          X    X    X    X    X    X    X         
                                                                      
ESA              EPH          X    X    X    X    X    X    X         
                 ERP          X    X    X    X    X    X    X         
                 SUM          X    X    X    X    X    X    X         
                                                                      
JPL              ERP          X    X    X    X    X    X    X         
                 SP1          X    X    X    X    X    X    X         
                 SP3          X    X    X    X    X    X    X         
                 SUM          X    X    X    X    X    X    X         
                                                                      
SIO              EPH          X    X    X    X    X    X    X         

                     IGN DATA CENTER WEEKLY STATUS                    
                             PRODUCT FILES                            
                    (as of  2-OCT-1992 10:18:04.17)                   
                                                                      
         GPS WEEK #661    6/9/1992 to 12/9/1992   days 250-256        

                              2    2    2    2    2    2    2         
                              5    5    5    5    5    5    5         
Center           Type         0    1    2    3    4    5    6         
---------------  ----------  ---  ---  ---  ---  ---  ---  ---        
COD              EPH          X    X    X    X    X    X    X         
                 ERP          X    X    X    X    X    X    X         
                                                                      
EMR              EPH          X    X    X    X    X    X    X         
                                                                      
ESA              EPH          X    X    X    X    X    X    X         
                 ERP          X    X    X    X    X    X    X         
                 SUM          X    X    X    X    X    X    X         
                                                                      
GFZ              CLK          X    X    X    X    X    X    X         
                 EPH          X    X    X    X    X    X    -         
                                                                      
JPL              ERP          X    X    X    X    X    X    X         
                 SP1          X    X    X    X    X    X    X         
                 SP3          X    X    X    X    X    X    X         
                 SUM          X    X    X    X    X    X    X         
                                                                      
SIO              EPH          X    X    X    X    X    X    X         

                     IGN DATA CENTER WEEKLY STATUS                    
                           CORE NETWORK DATA                          
                    (as of  5-OCT-1992 10:51:51.56)                   
                                                                      
        GPS WEEK #663    20/9/1992 to 26/9/1992   days 264-270        

                                           2   2   2   2   2   2   2  
                                           6   6   6   6   6   6   7  
Site name            Acr. Receiver         4   5   6   7   8   9   0  
-------------------- ---- --------------- --- --- --- --- --- --- --- 
ALBERT HEAD          ALBH ROGUE            X   X   X   X   X   X   X  
ALGONQUIN            ALGO ROGUE            X   X   X   X   X   X   X  
CANBERRA             CANB ROGUE            -   X   X   X   X   X   X  
FAIRBANKS            FAIR ROGUE            X   X   X   X   X   X   X  
GOLDSTONE            GOLD ROGUE            -   X   X   X   X   X   X  
GRAZ                 GRAA ASHTECH          X   X   X   X   X   X   X  
GRAZ                 GRAZ ROGUE            X   X   X   X   X   X   X  
HARTBEESTHOEK        HART ROGUE            X   X   X   X   X   X   X  
HERSTMONCEUX         HERS ROGUE            -   X   X   X   X   X   X  
HOBART               HOBA MINIMAC 2816     X   X   X   X   X   X   X  
KOOTWIJK             KOSG ROGUE            X   X   X   X   X   X   X  
MADRID-ROBLEDO       MADR ROGUE            -   -   X   X   X   X   X  
MASPALOMAS           MASP ROGUE            X   X   X   X   X   X   X  
MATERA               MATE ROGUE            X   X   X   X   X   X   X  
MC MURDO             MCMU ROGUE            X   X   X   X   X   X   X  
METSAHOVI            METS ROGUE            X   X   X   X   X   X   X  
MOJAVE               MOJ1 MINIMAC 2816     X   X   X   X   X   X   X  
NY-ALESUND           NYAL ROGUE            -   X   X   X   X   X   X  
ONSALA-RAO           ONSA ROGUE            X   X   X   X   X   X   X  
PAMATAI              PAMA ROGUE            X   X   X   X   X   X   X  
PASADENA             JPLM ROGUE            X   X   X   X   X   X   X  
PENTICTON            DRAO ROGUE            X   X   X   X   X   X   X  
SAINT JOHN'S         STJO ROGUE            X   X   X   X   X   X   X  
SANTIAGO             SANT ROGUE            X   X   X   X   X   -   X  
TAIPEI               TAIW MINIROGUE        X   X   X   X   X   X   X  
TOWNSVILLE           TOWN TRIMBLE SST      X   X   X   X   X   X   X  
TROMSOE              TROM ROGUE            X   X   X   X   X   X   X  
TSUKUBA              TSUK MINIMAC 2816     X   X   X   X   X   X   X  
USUDA                USUD ROGUE            X   X   X   X   X   X   X  
WELLINGTON           WELL TRIMBLE SST      X   X   X   X   X   X   X  
WESTFORD             WES1 MINIMAC 2816     X   X   X   X   X   X   X  
WETTZELL             WETT ROGUE            X   X   X   X   X   X   X  
YARRAGADEE           YAR1 ROGUE            X   X   X   X   X   X   X  
YELLOWKNIFE          YELL MINIROGUE        X   X   X   X   X   X   X  
ZIMMERWALD           ZIMA ASHTECH          X   X   X   X   X   X   X  
ZIMMERWALD           ZIMM TRIMBLE SST      -   -   -   X   X   X   X  
--------------------                                                  
                  36