Subject: [IGSMAIL-101] GFZ analysis report
From: Ch. Reigber
Date: 21 SEP 1992 18:24:21

***********************************************************************
IGS Electronic Mail       21-SEP-1992 18:24:21       Message Number 101
***********************************************************************
 
==============================================================================
                   THIS FILE CONTAINS 6 MESSAGES
==============================================================================

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

Report for GPS Week 658 (Days 229-235) from GFZ
===============================================

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

PRODUCT SUMMARY 

   GFZ0658*.EPH:  GPS ephemerides for GPS Week 658 (SP3 format, pos. and vel.)
                  * represents: 0 for Sunday, .... , 6 for Saturday
   GFZ06587.ERP:  Earth rotation parameter (UT1 corrections are not included)
   GFZ06587.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 for the days 229 and 235 our orbit files do not include
      the satellites 2, 16, 17, 20, 21, 23, 24, 25, 26, 28 and no
      pole coordinates are available
*********************************************************************************

CORE STATION SUMMARY

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

                                      Day of Week 658
                                    S  M  T  W  T  F  S
                                    U  O  U  E  H  R  A
        Site                        N  N  E  D  U  I  T
Name            Code      
---------------------------------------------------------
Algonquin       ALGO                X  X  X  X  X  X  X
Fairbanks       FAIR                X  X  X  X  X  X  X
Goldstone       DS10                X  X  X  X  X  X  -
Hartebeesthoek  HART                X  X  X  X  X  X  X
Kokee Park      KOKR                X  X  X  X  X  X  X
Mc Murdo        MCMU                X  X  X  X  X  X  X
Ny-Alesund      NALL                X  X  X  X  X  X  X
Pamatai         PAMA                X  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  X
Tromsoe         TROM                X  X  X  X  X  X  X 
Usuda           USUD                X  X  X  X  X  X  X
Wettzell        WTZ1                -  X  X  X  X  X  X
Yellowknife     YELL                X  X  X  X  X  X  X
Yarragadee      YAR1                X  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
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, USUD, NALL, 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     6    
   ------------------------------------------------------------------------
   Observation Interval [sec]       120   360   360   360   360   360   120
   Number of observations         10972 16802 24666 27793 25533 24095 11928 
   RMS of carrier phases [cm]       0.3   0.6   0.7   0.7   0.7   0.7   0.4
   RMS of code measurements [cm]   39.7  44.9  43.9  48.1  47.3  48.4  39.2
   ------------------------------------------------------------------------

-  GFZ06587.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.

*********************************************************************************
Note: Due to AS the pole solution do not include the days 229 and 235
*********************************************************************************
    
   MJD      x    sigmax    y    sigmay

 48851.5 -.0546 0.0006 0.4836 0.0007
 48852.5 -.0520 0.0003 0.4853 0.0003
 48853.5 -.0486 0.0003 0.4871 0.0003
 48854.5 -.0456 0.0003 0.4878 0.0003
 48855.5 -.0420 0.0003 0.4899 0.0003

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

From:     J. Kouba 
Subject:  Geodetic Survey Division (GSD), SMRSS, EMR analysis results
          -----------------------------------------------------------

    from:    J. Kouba
    Subject: Geodetic Survey Division (GSD), SMRSS, EMR analysis results

    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

        This is our first report to IGS. Our analysis utilizes the JPL 
GIPSY/OASIS II (UNIX version) 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). For confirmation and independent 
comparisons we also regularly reduce data from the North American stations and 
two European stations (TROM, WETT) stations with MicroCosm (tm) software 
package (a commercial version of GEODYN II). For non AS days the GIPSY and 
MicroCosm precise orbits typically show rms agreement (in each coordinate) at 
the 1 m level. This is encouraging, as except for the apriori EOP (DUT1) 
series, similar single station data preprocessing and about 70% of common data,
both solutions are quite independent employing different GPS data treatment, 
estimation strategies, mathematical modelling etc. 
        Submitted results start with August 4, 1992 and include only days when 
AS was not invoked. Currently we are still investigating optimum estimation 
strategies and some possible improvements, and once the strategies are 
finalized we are planning to reprocess all the IGS data. 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         248
Hartebeesthoek         HART         224, 239, 248
Kokee Park             KOKB
Madrid                 MADR         239, 248
Penticton, CAN         DRAO
Prince Albert, CAN     PRAL
Priddis, CAN           PRDS         226 -> (in operation only up to 225)
Santiago               SANT 
St. Johns, CAN         STJO
Canbera                CANB         220, 248
Tromsoe                TROM
Wettzell               WETT         238, 239, 240, 244, 248
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 IERS (Bull. B). 

Constants and models
        All constants such as GM, c, the gravity field model (GEMT3(8,8)) 
conform to the IGS standards. The (global) ocean loading according to 
Pagiatakis is applied, no permanent tidal corrections or tectonic station 
movements are applied. Rock 4 and 42 radiation pressure  models are used 
for Block I and II GPS satellites, resp.

Estimation strategies
        24 h independent orbit arcs are estimated daily with six initial 
satellite states and three radiation pressure coefficients. Until August 25, 
1992 the initial satellite states and radiation pressure coefficients were 
estimated from broadcast orbits and used as an apriori input. From this date on
the solutions from the previous day are mapped ahead and used as apriori input  
for the next 24 h satellite arc. Both types of apriori information are assigned 
large sigmas, namely 1km and .005m/s for position and velocity, respectively. 
Typically data from 16 or 17 stations for 18 GPS satellites are processed 
daily. Both phase and smoothed pseudorange, undifferenced observations above 15 
degrees at 5 min intervals are used and weighted with 0.005 and 0.5m sigmas, 
respectively. Real time initial phase ambiguities are estimated whenever 
necessary.  Tropospheric refraction errors are modelled by estimated 
corrections to a nominal model together with a stochastic (random walk) 
process. Reference timing is provided by fixing the Hydrogen Maser clock at 
ALGO which had clock errors well below 1 microsec during this period. 

  Table 3:  Summary of estimated parameters and apriori weighting
  (P3 and L3 undifferenced smoothed pseudorange and phase sigmas of 0.5m and  
.005m were used)

 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     "       "            50%
rad. press Gy        "       "            1.4 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. Due to 
problems with data quality for the AS days the results for the corresponding 
days (with AS turned on) are not included here. 
        Since August 26 we no longer use broadcast orbits to initialize daily 
orbit improvements, instead we use the orbit from previous day mapped 
appropriately. In this way the current solution corrections are discrepancies 
of estimates based on two adjacent (24h) data sets. The rms values for each 
coordinates are typically well below 1 m level with the exception of several 
eclipsing satellites which show some systematic biases at the 1-2m level. This 
is another indication of internal precision and is consistent with our GIPSY-
MicroCosm comparison mentioned above. 

   SUMMARY OF CANADIAN EMR SOLUTION 

1. Analysis centre    : Geodetic Survey Division (GSD), SMRSS, EMR
2. Solution identifier:  Submission 920918
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
   single day (24h) arc with 6 IC and 3 rad. parameters per satellite (18 
   satellites)
   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 (except ALGO which is fixed) once per epoch/station 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

48835.5  8/ 1/92                        AS on
48836.5  8/ 2/92                        AS on
48837.5  8/ 3/92                        AS on
48838.5  8/ 4/92    -.08040    .45640   .39550   .00054   .00041    0      0
48839.5  8/ 5/92    -.07852    .45792   .39399   .00055   .00041    0      0
48840.5  8/ 6/92    -.07692    .46031   .39249   .00053   .00039    0      0
48841.5  8/ 7/92    -.07677    .46180   .39100   .00058   .00043    0      0
48842.5  8/ 8/92                        AS on
48843.5  8/ 9/92                        AS on
48844.5  8/10/92                        AS on
48845.5  8/11/92    -.06960    .47192   .38501   .00059   .00047    0      0
48846.5  8/12/92    -.06700    .47301   .38242   .00045   .00039    0      0
48847.5  8/13/92    -.06235    .47719   .38201   .00052   .00038    0      0
48848.5  8/14/92    -.06141    .47691   .38051   .00052   .00038    0      0
48849.5  8/15/92                        AS on
48850.5  8/16/92                        AS on
48851.5  8/17/92                        AS on
48852.5  8/18/92    -.05103    .48432   .37436   .00058   .00041    0      0
48853.5  8/19/92    -.04751    .48801   .37281   .00052   .00039    0      0
48854.5  8/20/92    -.04655    .48666   .36832   .00046   .00028    0      0
48855.5  8/21/92    -.04118    .48905   .36475   .00048   .00030    0      0
48856.5  8/22/92                        AS on
48857.5  8/23/92                        AS on
48858.5  8/24/92                        AS on
48859.5  8/25/92    -.03310    .49381   .36330   .00067   .00043    0      0
48860.5  8/26/92    -.02673    .49412   .36166   .00064   .00039    0      0
48861.5  8/27/92    -.02603    .49690   .36001   .00056   .00033    0      0
48862.5  8/28/92    -.02160    .49650   .35837   .00047   .00030    0      0
48863.5  8/29/92    -.01862    .49970   .35195   .00045   .00029    0      0
48864.5  8/30/92    -.01594    .50051   .35009   .00047   .00029    0      0
48865.5  8/31/92    -.01411    .50298   .34824   .00057   .00033    0      0
48866.5  9/01/92    -.01212    .50367   .34638   .00048   .00031    0      0
48867.5  9/02/92    -.01148    .50320   .34453   .00049   .00032    0      0
48868.5  9/03/92    -.00727    .50354   .34267   .00048   .00030    0      0
48869.5  9/04/92    -.00386    .50243   .34082   .00084   .00068    0      0

Products generated:

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

EMR06567.EPH        precise GPS ephemeris for week # 656 in sp1 NGS format
EMR06577.EPH        precise GPS ephemeris for week # 657 in sp1 NGS format
EMR06587.EPH        precise GPS ephemeris for week # 658 in sp1 NGS format
EMR06597.EPH        precise GPS ephemeris for week # 659 in sp3 NGS format
EMR06607.EPH        precise GPS ephemeris for week # 660 in sp3 NGS format

EMR06607.ERP        pole x y solutions for weeks# 656-660
 
EMR06607.SUM        name of this text file

remarks on EMR's products:
1. only days with no AS included
2. satellite clock solution in sp3 EPH files is w.r.t. hydrogen maser at ALGO,
   epochs with no reference (ALGO not observing a satellite) have a value
   of 99999. microseconds.
-- 
Mark Caissy
Geodetic Survey Division 
Ottawa, Ontario, Canada

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

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

SIO PGGA/GARNER Analysis Center Results (18 Sept, 1992)

Yehuda Bock, Peng Fang and Keith Stark

This week we include the following information:

Polar motion results for 04 to 11 Sept.

    The set of coordinates described below is based on the 
    analysis of the first 51 days of the IGS campaign, and
    include coordinates of the PGGA sites after the Landers earthquake.

1. Analysis Center: Scripps Institute of Oceanography
2. Solution Identifier: Submission 920918
3. Software used: GAMIT/GLOBK
4. Definition of Terrestrial Reference Frame:
     Origin: Nominally ITRF-90
     Orientation: Nominally ITRF-90
     Reference epoch: 1992.57  (MJD 48829.5)
     Relativity Scale: Terrestrial
     Velocity of light: 299792458.0 m/sec
     Permanent tidal correction: None

5. Adjusted parameters:
   (a) Double-difference data
   (b) Single day orbit arcs, 6 ICs and 3 radiation parameters per 
satellite-per-day
   (c) One-per-day-per-station zenith tropospheric parameter,
   (d) Bias parameters, one for each independent double difference 
combination.
   (e) Station positions with +- 10 m constraints at stations other 
than: ALGO, YELL, PIN1, PINB, JPL1, JPLB, SIO1, SIO2, FAIR, KOKR, 
USUD, DS10, DS1B, DS40, DS41, DS60, YAR1, MCMU, TAIW, ONSA, WTZ1, 
METS, MATE, TROM, NALL, KOSG.  For these stations constraints of
+0.001 m for horiziontal and +-0.005 m for the height were used.
   (f) X and Y pole position once per day.  (No estimate is made of UT1-
AT since these deviations are absorbed into the orbital parameters).
   (g) On MJD 48800.5, the California sites are treated as separate
sites before and after the Landers earthquake.

6. Station coordinates used.

  DOMES #  Name          X            Y             Z        Epoch    Dur        +- X   +- Y   +- Z    Vx       Vy      Vz
                        (m)          (m)           (m)        MJD      days       (m)    (m)   (m)    (m/yr)  (m/yr)  (m/yr)
X10302M003 Tromsoe    2102940.447   721569.360  5958192.092 48829.5    51.0      0.002  0.002  0.003 -0.0186  0.0110  0.0052 
X10317M001 NALL       1202431.371   252626.765  6237770.782 48829.5    49.0      0.002  0.002  0.003 -0.0178  0.0083  0.0031 
X10402M004 ONSA       3370658.746   711876.997  5349786.805 48829.5    50.0      0.002  0.002  0.003 -0.0168  0.0147  0.0086 
X10503S011 METS       2892571.016  1311843.303  5512634.005 48829.5    36.0      0.002  0.002  0.003 -0.0192  0.0132  0.0070 
X11001M002 Graz       4194424.048  1162702.525  4647245.239 48829.5    12.0      0.003  0.002  0.003 -0.0164  0.0168  0.0106 
X12734M008 MATE new   4641949.803  1393045.257  4133287.221 48829.5    49.0      0.002  0.002  0.003 -0.0157  0.0179  0.0117 
X13212M007 Herstmon   4033470.295    23672.714  4924301.128 48829.5    46.0      0.005  0.003  0.005 -0.0135  0.0165  0.0110 
X13407S012 Madrid     4849202.507  -360329.166  4114912.958 48829.5    40.0      0.003  0.002  0.003 -0.0101  0.0185  0.0135 
X13504M003 Kootwijk   3899225.329   396731.773  5015078.266 48829.5    43.0      0.002  0.002  0.003 -0.0150  0.0161  0.0104 
X14201S020 Wettzell   4075578.658   931852.651  4801569.960 48829.5    48.0      0.002  0.002  0.003 -0.0161  0.0165  0.0105 
X21729S003 Usuda     -3855262.632  3427432.244  3741020.958 48829.5    27.0      0.004  0.004  0.005 -0.0212 -0.0097 -0.0130 
X23601M001 Taipei    -3024781.855  4928936.973  2681234.516 48829.5    46.0      0.005  0.005  0.005 -0.0232 -0.0078 -0.0118 
X30302M002 HART       5084625.120  2670366.540 -2768494.199 48829.5    32.0      0.008  0.007  0.004 -0.0013  0.0241  0.0209 
X31303M001 MASPollom  5439189.154 -1522054.819  2953464.086 48829.5    26.0      0.003  0.002  0.003 -0.0040  0.0185  0.0169 
X40101M001 St. John   2612631.381 -3426807.002  4686757.711 48829.5    17.0      0.003  0.002  0.003 -0.0195 -0.0033  0.0084 
X40104M002 ALGO        918129.627 -4346071.211  4561977.762 48829.5    49.0      0.002  0.002  0.002 -0.0193 -0.0029  0.0012 
X40105M002 Penticon  -2059164.597 -3621108.342  4814432.369 48829.5    51.0      0.002  0.002  0.002 -0.0201 -0.0023 -0.0103 
X40127M003 YELL      -1224452.373 -2689216.062  5633638.275 48829.5    51.0      0.002  0.002  0.002 -0.0231 -0.0029 -0.0064 
X40400M006 JPL1      -2493304.076 -4655215.507  3565497.271 48829.5    23.0      0.002  0.003  0.003 -0.0372  0.0153  0.0120 
X40400M007 JPL1 PEQ  -2493304.072 -4655215.483  3565497.259 48829.5    28.0      0.002  0.003  0.003 -0.0372  0.0153  0.0120 
X40405S028 Golstone  -2353614.088 -4641385.363  3676976.416 48829.5    22.0      0.002  0.003  0.003 -0.0159  0.0069 -0.0081 
X40405S031 Gold PEQ  -2353614.092 -4641385.353  3676976.394 48829.5    21.0      0.002  0.003  0.003 -0.0159  0.0069 -0.0081 
X40407M002 PIN1      -2369510.404 -4761207.161  3511396.023 48829.5    23.0      0.002  0.003  0.002 -0.0224  0.0218 -0.0004 
X40407M003 PIN1 PEQ  -2369510.373 -4761207.140  3511396.054 48829.5    29.0      0.002  0.003  0.002 -0.0224  0.0218 -0.0004 
X40408M001 Fairbanks -2281621.313 -1453595.741  5756961.965 48829.5    19.0      0.002  0.002  0.003 -0.0233 -0.0027 -0.0099 
X40424M004 Kokee Pk. -5543838.053 -2054587.456  2387809.481 48829.5    43.0      0.003  0.002  0.003 -0.0100  0.0613  0.0294 
X40460M002 SIO2      -2455539.248 -4767224.071  3441628.810 48829.5    17.0      0.002  0.004  0.003 -0.0335  0.0302  0.0180 
X40460M003 SIO2 PEQ  -2455539.226 -4767224.054  3441628.808 48829.5    21.0      0.002  0.003  0.003 -0.0335  0.0302  0.0180 
X40460M001 SIO1      -2455521.697 -4767213.379  3441654.850 48829.5    12.0      0.004  0.003  0.003 -0.0335  0.0302  0.0180 
X41705M003 SANT       1769692.988 -5044573.802 -3468321.387 48829.5    48.0      0.006  0.007  0.004  0.0013 -0.0044  0.0071 
X50103S017 CANB(DS42)-4460996.139  2682557.264 -3674444.110 48829.5    39.0      0.006  0.006  0.005 -0.0363  0.0023  0.0458 
X50107M004 Yarragad. -2389025.452  5043316.874 -3078531.064 48829.5    46.0      0.006  0.006  0.005 -0.0485  0.0107  0.0552 
X66001S005 Mc Murdo  -1310696.393   310469.318 -6213368.515 48829.5    43.0      0.007  0.007  0.005  0.0091 -0.0107 -0.0024 
X92201M003 Pamatai   -5245195.149 -3080472.127 -1912825.677 48829.5    20.0      0.006  0.006  0.004 -0.0416  0.0527  0.0293 
X50134M001 Darwin    -4091358.542  4684606.625 -1408580.749 48829.5    11.0      0.007  0.006  0.005 -0.0376 -0.0146  0.0609 
X40420M006 VNDP      -2678089.800 -4525437.755  3597431.423 48829.5    15.0      0.002  0.003  0.003 -0.0302  0.0327  0.0187 
NOTES:
 (a) The epoch refers to the epoch at which the site position applies
and not the mid-point of the data span.  We have also added the
velocities adopted for these sites at the end of each line.  For most sites
these are the NUVEL-1 velocities with the North American AM0-2 velocity
added.  For PIN1 and DS10, Observed velocities (based on a combined VLBI/
GPS solution using ~10 years of data have been used).
 (b) The PEQ notation in the site name (PINB, DS1B, SIOC and JPLB) denotes 
post-Landers earthquake position (applicable after 11:58 UTC June 28, 1992).
 (c) These coordinates were estimated from the first 51 days of IGS data.
They have been rotated and translated into the ITRF 1990 frame by use
of the horizontal coordinates at all sites.  The rms difference between 
the horizontal coordinates of these sites and our previous realization 
(second IERS submission) was 5 mm.

6. Solution 920918
 
* MIT_TO_IERS: Run on 1992/ 9/18  8:48
* Input file : pmu091892.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

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:     Bob E. Schutz
Subject:  UTX analysis report
          -------------------

      Earth  Orientation Results Submitted to IERS

EARTH ROTATION PARAMETERS
ANALYSIS CENTER:  UNIVERSITY OF TEXAS CENTER FOR SPACE RESEARCH
DATA:  GPS
SOLUTION IDENTIFIER:  EOP(CSR) 92 P 01
SUBMISSION DATE: 18 SEPTEMBER 1992

Notes:  
  1.  RMS is in cm
  2.  The following satellites were included (by PRN): 2,3,11,12,13,14,15,16,17,18,19,20,21,23,24,25,26,28
  3.  AS was "on" during Day 236 and 237.  These days are not included in the solution.
  4.  PRN 20 experienced an apparent thrust on Day 239.  It was not included on this day.

   MJD         x        y    UT1        sx       sy     sUT1     RMS   cxy   cxUT1 cyUT1     Sta  Sat Passes

 48859.5 -0.03212  0.49266  0.000000  0.00018  0.00019  0.000000 1.68  0.048  0.000  0.000    22  18   471
 48860.5 -0.02817  0.49418  0.000000  0.00016  0.00019  0.000000 1.52  0.004  0.000  0.000    22  17   460
 48861.5 -0.02495  0.49555  0.000000  0.00017  0.00019  0.000000 1.51 -0.051  0.000  0.000    22  18   475
 48862.5 -0.02205  0.49650  0.000000  0.00018  0.00022  0.000000 1.53  0.130  0.000  0.000    23  18   491
 48863.5 -0.01861  0.49849  0.000000  0.00016  0.00018  0.000000 1.71  0.116  0.000  0.000    23  18   500

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

From:     Joachim Feltens 
Subject:  ESA/ESOC analysis report
          ------------------------

-------------------------
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 06 - 12

 *******************************************************************************
 During the  weekend of days  256 to 258 (September 12 - 14), anti-spoofing  has
 been on. Nevertheless,  because a lot of  receivers provide  data now in cross-
 correlated mode during A/S,  and because of changes in  our software  concering
 preprocessing, those satellites which  are affected by A/S, are  included  into
 the IGS-data processing too. So all the satellites of the whole GPS-system have
 been included in our processing.
 *******************************************************************************

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| |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
      250|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      251|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      252|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      253|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      254|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      255|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
      256|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |

   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 661     |
                          |             |    | 2  2  2  2  2  2  2 |
                          |             |    | 5  5  5  5  5  5  5 |
              SITE        |   COUNTRY   |CODE| 0  1  2  3  4  5  6 |  REMARKS
      --------------------|-------------|----|---------------------|------------
        Algonquin         | Canada      |ALGO| F  F  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  F  F |
        Kokee Park        | U.S.A/Hawaii|KOKB| e  e  e  e  e  e  e |
        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  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 -- |
        Ny Alesund/Spitzb.| Norway      |NYAL| e  e  e  e  e  e  e |
        Onsala            | Sweden      |ONSA| e  e  e  e  e  e  e |
        Pamate/Tahiti     | France      |PAMA| e  e  e  e  e  e  e |
        Santiago          | Chile       |SANT| F  F  F  F  F  F  F |
        Tai-Shi           | Taiwan      |TAIW| e  e  e  e  e  e  e |
        Usuda             | Japan       |USUD| e  e  e  e  e  e  e |
        Wettzell          | Germany     |WETT| F  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.

   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:

   ESA06610.EPH   - Precise GPS orbits for day 250 (September 06)
   ESA06611.EPH   - Precise GPS orbits for day 251 (September 07)
   ESA06612.EPH   - Precise GPS orbits for day 252 (September 08)
   ESA06613.EPH   - Precise GPS orbits for day 253 (September 09)
   ESA06614.EPH   - Precise GPS orbits for day 254 (September 10)
   ESA06615.EPH   - Precise GPS orbits for day 255 (September 11)
   ESA06616.EPH   - Precise GPS orbits for day 256 (September 12)
   ESA06617.ERP   - Earth rotation results for week beginning 1992 September 06
   ESA06617.SUM   - The name of this text file

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

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

                     IGN DATA CENTER WEEKLY STATUS                    
                           CORE NETWORK DATA                          
                    (as of 21-SEP-1992 10:20:02.54)                   
                                                                      
         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  
Site name            Acr. Receiver         0   1   2   3   4   5   6  
-------------------- ---- --------------- --- --- --- --- --- --- --- 
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                 GRAA ASHTECH          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   X  
KOKEE PARK           KOKB ROGUE            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  
METSAHOVI            METS ROGUE            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   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   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   X   X  
--------------------                                                  
                  37