Subject: [IGSMAIL-124] EMR analysis report
From: Jan Kouba
Date: 26 OCT 1992 19:40:12

***********************************************************************
IGS Electronic Mail       26-OCT-1992 19:40:12       Message Number 124
***********************************************************************
 
==============================================================================
                   THIS FILE CONTAINS 5 MESSAGES
==============================================================================

From:    Jan Kouba
Subject: EMR analysis report
         -------------------

Jan Kouba
Geodetic Survey of Canada
Ottawa, Ontario, Canada
Internet: [email-masked]

    from:    J. Kouba
    Subject: Geodetic Survey Division (GSD), SMRSS, EMR analysis results
             for the GPS week # 665 (Oct 04-Oct 10, 1992)

    submitted by:
    J. Kouba * , P. Tetreault, R. Ferland, F. Lahaye, M. Caissy, P. Heroux

    Geodetic Survey Division (GSD), Surveys Mapping & Remote Sensing Sector
    (SMRS), Energy Mines and Resources (EMR), 615 Booth Str., Ottawa, K1A 0E3
*   on secondment to the Geodetic Survey from the Geophysics Div., Geological 
    Survey of Canada (GSC), EMR, 1 Observatory cresc., Ottawa, K1A 0Y3

       
      Our analysis utilizes the JPL GIPSY/OASIS II (UNIX) software system 
and data from all (up to 7) Canadian stations augmented by up to 10, globally 
distributed, core stations (see Table 1 for the list of stations).  
      Submitted results start with GPS Week # 665 and include only days when 
AS was not invoked. This effort is a part of a joint pilot project to test the
so called "Active Control System" in Canada and involves the  Geodetic
Survey (GSD), SMRSS, the Geophysics Division and Pacific Geoscience Centre of
the Geological Survey of Canada, all three institutions are part of the
Department of Energy, Mines & Resources (EMR).

        Table 1 : Station Summary (also indicated are day no. for which a 
particular station is not included in the daily solution, either due to being 
down or data being late) 

 station               IGS code        missing day no. of 1992

Albert Head, CAN       ALBH
Algonquin, CAN         ALGO         
Fairbanks              FAIR         
Goldstone              GOLD         
Hartebeesthoek         HART         
Kokee Park             KOKB         278 -> 284
Madrid                 MADR         280
Penticton, CAN         DRAO
Prince Albert, CAN     PRAL
Santiago               SANT         280 
St. Johns, CAN         STJO
Canbera                CANB        
Tromsoe                TROM         
Wettzell               WETT        
Yarragadee             YAR1
Yellowknife, CAN       YELL    

    SOLUTION CHARACTERISTICS

Reference frame and orientation
        Nominally ITRF91 at epoch 1992.5, realized by constraining the 
following stations at the IGS coordinates (see IGS message #90): 

     Table 2:  Constrained stations
Station     code    L1p.c.     X(m)        Y(m)       Z(m)       apriori sigmas
Algonquin   ALGO    .192m   918129.616 -4346071.224 4561977.800  .002 .002 .002
Fairbanks   FAIR    .194  -2281621.327 -1453595.775 5756961.976  .02  .02  .02
Tromsoe     TROM   2.551   2102940.451   721569.379 5958192.072  .02  .02  .02
Wettzell    WETT    .078   4075578.683   931852.634 4801569.980  .02  .02  .02
Yarragadee  YAR1    .151  -2389025.331  5043316.830-3078530.926  .02  .02  .02

The remaining stations are considered unknown (with 50 m apriori sigmas). 
Orientation is realized through the above coordinates and the fixed  DUT1
values from NEOS/IERS (Bull. A). 

Constants and models 
- no change, see the IGS mess. #101 for details -
Estimation strategies
- no change, see the IGS mess. #101 for details -
  ALGO was used as time reference.                           

  Table 3:  Summary of estimated parameters and apriori weighting
  (L3 and P3 undifferenced phase and smoothed pseudorange sigmas of 0.005m and  
.5m were used, > 15 degrees @ 5 min.)

 parameter         model                  apriori weighting (sigmas)
station X,Y,Z      unknown parameters     50m (fixed stations .002-.02m)
pole  x,y            "       "            3m; (DUT1 fixed)
trop. zen. delay     "       "            0.2m
trop. bias         random walk            .01m/sqrt(1hour)
satellite states   unknown parameters     1km; .005m/s
rad. press Gx,Gz     "       "            25%
rad. press Gy        "       "            2.0 10e-9 m/s^2
initial real cy amb. "       "            300000km
station clocks     white noise            1s
satellite clocks     "     "              1ms and .1ms for Block I and II,resp.

       Aposterioi variance factors typically are between 0.5 and 1.0 (noise 
about 3mm and 200mm for phase and smoothed pseudorange observations, resp.). 
Due to data quality for the AS days the results for the corresponding 
days (with AS turned on) are not included here. 

   SUMMARY OF CANADIAN EMR SOLUTION 

1. Analysis centre    : Geodetic Survey Division (GSD), SMRSS , EMR
2. Solution identifier:  Submission 921022
3. Software used      :  GIPSY/OASIS II (UNIX )
4. Definition of Terrestrial frame:
   origin             : Nominally ITRF91
   orientation        :    "        "
   reference epoch    : 1992.5
   velocity of light  : 299792458 m/s
   GM                 : 389600.4414 km^3/s^5
   gravity model      : GEMT3( 8,8) +C21+S21
   permanent tide corr: None
   ocean loading      : Pagiatakis, global model
5. Adjusted parameters:
   undifferenced phase and smoothed pseudorange data  > 15 degrees @ 5 min.
   single day (24h) arc with 6 IC and 3 rad. parameters per satellite (19 
   satellites, PRN 27 included)
   tropospheric zenith delay corr. parameter augmented with random walk stoch. 
   process
   initial phase ambiguity parameters (one for each satellite station pass or 
   initial phase)
   station positions X,Y,Z, up to 17 stations, ALGO constrained at 2mm, FAIR, 
   TROM, WETT and YAR1 at 2cm sigmas.
   x and y pole position once a day (DUT1 fixed; x,y apriori sigma=3m)
   station clock biases once per each epoch/station (except for ALGO h. maser
   which provides the time reference) with sigma 1 s
   satellite clock biases once per each epoch/satellite with 1ms or .1ms sigma

Pole solution for non AS days

MJD      date          x(")      y(")   DUT1(s)   xsig     ysig    utsig   xyc

48899.5 10/04/92                 AS on
48900.5 10/05/92                 AS on
48901.5 10/06/92     .06799    .50491   .27696   .00062   .00040    0      0
48902.5 10/07/92     .06991    .50575   .27484   .00053   .00031    0      0
48903.5 10/08/92     .07381    .50471   .27257   .00053   .00031    0      0
48904.5 10/09/92     .07731    .50491   .27018   .00052   .00032    0      0
48905.5 10/10/92                 AS on

Products generated:

The following products are generated and uploaded into CDDIS @ NASA/GSFC

EMR06657.EPH        precise GPS ephemeris for week # 665 in sp3 NGS format

EMR06657.ERP        pole x y solutions for week# 665
 
EMR06657.SUM        name of this text file

remarks on EMR's products:
1. only days with no AS included
2. ALGO hydrogen maser used as a time reference. In the sp3 EPH file sat.
   epochs with no reference (e.g. ALGO not observing a satellite) have a value 
   of 99999. microseconds. 
   ALGO clock error was about -0.12 microsec w.r.t. GPS time during this period.
3. ephemeris refers to the mass centre of SV

Jan Kouba
Geodetic Survey of Canada
Ottawa, Ontario, Canada
Internet: [email-masked]

	Below is corrected EMR EOP solution for w. 665. In the original
submission of Oct 22/92 a wrong apriori EOP was used to reconstruct 
the EOP solution. Sorry for the mistake.

    
   SUMMARY OF CANADIAN EMR SOLUTION 

1. Analysis centre    : Geodetic Survey Division (GSD), SMRSS , EMR
2. Solution identifier:  Submission 921022(corrected)
3. Software used      :  GIPSY/OASIS II (UNIX )
4. Definition of Terrestrial frame:
   origin             : Nominally ITRF91
   orientation        :    "        "
   reference epoch    : 1992.5
   velocity of light  : 299792458 m/s
   GM                 : 389600.4414 km^3/s^5
   gravity model      : GEMT3( 8,8) +C21+S21
   permanent tide corr: None
   ocean loading      : Pagiatakis, global model
5. Adjusted parameters:
   undifferenced phase and smoothed pseudorange data  > 15 degrees @ 5 min.
   single day (24h) arc with 6 IC and 3 rad. parameters per satellite (19 
   satellites, PRN 27 included)
   tropospheric zenith delay corr. parameter augmented with random walk stoch. 
   process
   initial phase ambiguity parameters (one for each satellite station pass or 
   initial phase)
   station positions X,Y,Z, up to 17 stations, ALGO constrained at 2mm, FAIR, 
   TROM, WETT and YAR1 at 2cm sigmas.
   x and y pole position once a day (DUT1 fixed; x,y apriori sigma=3m)
   station clock biases once per each epoch/station (except for ALGO h. maser
   which provides the time reference) with sigma 1 s
   satellite clock biases once per each epoch/satellite with 1ms or .1ms sigma

Pole solution for non AS days

MJD      date          x(")      y(")   DUT1(s)   xsig     ysig    utsig   xyc

48899.5 10/04/92                 AS on
48900.5 10/05/92                 AS on
48901.5 10/06/92     .07067    .50321   .27395   .00062   .00040    0      0
48902.5 10/07/92     .07268    .50405   .27168   .00053   .00031    0      0
48903.5 10/08/92     .07648    .50301   .26941   .00053   .00031    0      0
48904.5 10/09/92     .07990    .50331   .26713   .00052   .00032    0      0
48905.5 10/10/92                 AS on

Products generated:

The following products are generated and uploaded into CDDIS @ NASA/GSFC

EMR06657.EPH        precise GPS ephemeris for week # 665 in sp3 NGS format

EMR06657.ERP        pole x y solutions for week# 665
 
EMR06657.SUM        name of this text file

remarks on EMR's products:
1. only days with no AS included
2. ALGO hydrogen maser used as a time reference. In the sp3 EPH file sat.
   epochs with no reference (e.g. ALGO not observing a satellite) have a value 
   of 99999. microseconds. 
   ALGO clock error was about -0.12 microsec w.r.t. GPS time during this period.
3. ephemeris refers to the mass centre of SV

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

From:		Ulf J. Lindqwister/JPL
Subject:	GPS Global Network Advisory
                ---------------------------

The GPS antenna at Usuda, Japan, will be bolted down to a cement block
on October 29, 1992. The antenna and choke-ring will also at same time
be covered by a plexi-glass dome. The antenna is expected to be moved
and probably diconnected for parts of the day of the 29th.
The final antenna configuration is expected to be 10 cm lower in the
vertical direction and unchanged in the horizontal directions (compared
to the current configuration).

Regards,

- Ulf

Ulf J. Lindqwister, Supervisor
GPS Networks & Operations Group
Jet Propulsion Laboratory
4800 Oak Grove Dr.
Pasadena, CA 91109

(818) 354 1734
(818) 393 4965, FAX
[email-masked]

==============================================================================
From:    Yehuda Bock
Subject: SIO PGGA/GARNER analysis report

SIO PGGA/GARNER Analysis Center Results (24 Oct. 1992)

Yehuda Bock, Peng Fang and Keith Stark

This week we include the following new information:
                                  
Polar motion results for 10 to 16 Oct.

Notes:

(1) AS effects polar motion estimates on 10 - 11 Oct.
(2) Coordinates/Reference Frame used for tracking stations described 
in results of 24 Sept. 1992

* MIT_TO_IERS: Run on 1992/10/24 17:50
* Input file : pmu102492.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
 48891.5   0.04807  0.50908  0.294636  0.00079 0.00068 0.000000 2.00  0.454  0.000  0.000   25   7 0
 48892.5   0.05008  0.50938  0.291634  0.00097 0.00078 0.000000 1.36  0.525  0.000  0.000   24   7 0
 48893.5   0.05028  0.50874  0.289091  0.00033 0.00034 0.000000 1.72  0.139  0.000  0.000   24  19 0
 48894.5   0.05329  0.50739  0.287040  0.00020 0.00016 0.000000 2.58  0.149  0.000  0.000   26  19 0
 48895.5   0.05625  0.50663  0.285410  0.00017 0.00015 0.000000 2.74  0.088  0.000  0.000   26  19 0
 48896.5   0.05831  0.50606  0.284047  0.00018 0.00016 0.000000 2.55  0.056  0.000  0.000   26  19 0
 48897.5   0.06044  0.50586  0.282777  0.00016 0.00014 0.000000 3.09  0.089  0.000  0.000   26  19 0
 48898.5   0.06415  0.50550  0.281468  0.00081 0.00068 0.000000 1.39  0.420  0.000  0.000   26   7 0
 48899.5   0.06470  0.50580  0.280011  0.00052 0.00041 0.000000 1.77  0.307  0.000  0.000   25  15 0
 48900.5   0.06743  0.50455  0.278327  0.00037 0.00030 0.000000 2.57  0.373  0.000  0.000   25  19 0
 48901.5   0.07097  0.50468  0.275482  0.00024 0.00020 0.000000 2.19  0.207  0.000  0.000   26  19 0
 48902.5   0.07506  0.50531  0.273229  0.00018 0.00017 0.000000 2.64  0.130  0.000  0.000   26  19 0
 48903.5   0.07803  0.50464  0.270803  0.00019 0.00016 0.000000 2.73  0.151  0.000  0.000   26  19 0
 48904.5   0.08082  0.50379  0.268274  0.00018 0.00016 0.000000 2.64  0.167  0.000  0.000   26  19 0
 48905.5   0.08379  0.50361  0.265735  0.00052 0.00048 0.000000 1.80  0.061  0.000  0.000   26  18 0
 48906.5   0.08392  0.50180  0.263291  0.00064 0.00058 0.000000 1.28  0.220  0.000  0.000   25   7 0
 48907.5   0.08743  0.50169  0.261022  0.00033 0.00030 0.000000 1.76  0.047  0.000  0.000   26  19 0
 48908.5   0.09098  0.49991  0.258988  0.00022 0.00021 0.000000 1.71  0.234  0.000  0.000   25  17 0
 48909.5   0.09372  0.49925  0.257201  0.00018 0.00016 0.000000 2.79  0.162  0.000  0.000   26  19 0
 48910.5   0.09665  0.49928  0.255606  0.00019 0.00017 0.000000 2.08  0.177  0.000  0.000   26  18 0
 48911.5   0.09908  0.49859  0.252858  0.00019 0.00018 0.000000 2.13  0.173  0.000  0.000   26  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:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
          -----------------------------------------

Date:     26 October 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    69  -0.73 -2.23          1.26  1.93  
             -48870.5

Scripps      48780.5   123  -1.08 -1.57          0.80  0.58
             -48904.5     

U. of Berne  48792.5     8  -0.97  1.25  -0.28   1.51  1.87  0.13 
 (ITRF90)    -48799.5

U. of Berne  48800.5   103  -0.41  0.08  -2.46   0.81  0.97  1.24 
(ITRF91)    -48902.5

JPL          48794.5    95  -1.13  0.08          0.68  0.88 
             -48904.5

GFZ          48795.0    87  -2.30 -1.87          1.17  1.22
             -48890.5

ESOC         48794.5   119  -1.73  0.11          1.35  2.02
             -48912.5

EMR          48838.5    44  -0.28 -1.29          1.58  1.00
             -48904.5

Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  [email-masked]

==============================================================================
From:     L. Daniel
Subject:  IGN data center weekly status
          -----------------------------

                     IGN DATA CENTER WEEKLY STATUS                    
                             PRODUCT FILES                            
                    (as of 26-OCT-1992 15:30:13.41)                   
                                                                      
        GPS WEEK #665    4/10/1992 to 10/10/1992   days 278-284       

                              2    2    2    2    2    2    2         
                              7    7    8    8    8    8    8         
Center           Type         8    9    0    1    2    3    4         
---------------  ----------  ---  ---  ---  ---  ---  ---  ---        
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         
                                                                      
SIO              EPH          X    X    X    -    -    -    -         

                     IGN DATA CENTER WEEKLY STATUS                    
                             PRODUCT FILES                            
                    (as of 26-OCT-1992 15:29:54.02)                   
                                                                      
        GPS WEEK #664    27/9/1992 to 3/10/1992   days 271-277        

                              2    2    2    2    2    2    2         
                              7    7    7    7    7    7    7         
Center           Type         1    2    3    4    5    6    7         
---------------  ----------  ---  ---  ---  ---  ---  ---  ---        
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 26-OCT-1992 15:29:32.82)                   
                                                                      
        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         
Center           Type         4    5    6    7    8    9    0         
---------------  ----------  ---  ---  ---  ---  ---  ---  ---        
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         
                                                                      
GFZ              CLK          X    X    X    X    X    X    X         
                 EPH_Z        -    -    X    X    X    X    -         
                 ERP          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         

                     IGN DATA CENTER WEEKLY STATUS                    
                           CORE NETWORK DATA                          
                    (as of 23-OCT-1992 09:22:12.99)                   
                                                                      
       GPS WEEK #666    11/10/1992 to 17/10/1992   days 285-291       

                                           2   2   2   2   2   2   2  
                                           8   8   8   8   8   9   9  
Site name            Acr. Receiver         5   6   7   8   9   0   1  
-------------------- ---- --------------- --- --- --- --- --- --- --- 
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   X  
FAIRBANKS            FAIR ROGUE            X   X   X   X   X   X   X  
GOLDSTONE            GOLD ROGUE            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   X  
HOBART               HOBA MINIMAC 2816     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   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  
NY-ALESUND           NYAL ROGUE            X   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   -  
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           ZIMM TRIMBLE SST      X   X   X   X   X   X   X  
--------------------                                                  
                  33