Subject: [IGSREPORT-1589] Wk 0788 JPL Analysis Report
From: D C Jefferson
Date: Mon, 27 Feb 1995 14:50:10 PST

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IGS Electronic Report    Mon Feb 27 14:50:10 PST 1995      Message Number 1589
******************************************************************************

Author: D C Jefferson
Subject: Wk 0788 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0788 (DAYS 43-49, DATES 1995 Feb 12 - Feb 18)
******************************************************************************

Submitted by the JPL IGS/FLINN Analysis Team:

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

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

Files listed below are available in Unix compressed format and can be
retrieved using anonymous ftp to sideshow.jpl.nasa.gov (128.149.70.41),
directory pub/jpligsac/0788.  These files have also been sent to the CDDIS.

______________________________________________________________________________
filename               contents
______________________________________________________________________________
jpl07887.sum           This text file.
jpl07887.erp           Earth rotation parameters for GPS week 788.
jpl0788[0-6].sp3       GPS ephemerides for GPS week 788, sp3 format.
______________________________________________________________________________

According to the file nanu1995.mes obtained from the IGS CBIS, PRN06 was
declared unusable from 03:48 until 09:23 UT on day 047 (Feb 16) due to
repositioning.  Convergence of the nominal orbit for this satellite exceeded 
our tolerance on this and the previous day as well, and was excluded from both
days' analyses.

Beginning day 049 (Feb 18), we have slightly modified our method of choosing
which sites are used in determining the GPS satellite orbits.  We still use
a total of 32, however only the first 29 are selected in the manner described
in IGS Report No. 1267 (jpl07677.sum).  The remaining 3 are chosen at random.
This is being done in order to allow all the sites that we analyze to 
participate in the global solution at least several times over a year, 
providing free-network (unconstrained) solutions for these stations.

Also beginning this week, we analyze data from two existing sites not 
previously included.  These are JOZE (Jozefoslaw, Poland) and UPAD (University 
of Padova, Italy).  The following nominal coordinates were assumed:

   JOZE: X =  3664930.8493 m,   Y = 1409139.9328 m,    Z =  5009574.8323 m
   UPAD: X =  4389524.8859 m,   Y =  923233.6097 m,    Z =  4519271.5894 m

Due to a software bug, the estimated yaw rates that have been published in
/pub/jpligsac on node 128.149.70.41 since September 1994 are in error.  They
do not reflect the actual estimated values used in our processing.  The bug
was such that the posted values are likely to be closer to the a-priori value 
than the true estimates.  Thus, the actual variability in the yaw rates is 
under-represented.  Unfortunately it is impossible to recover the correct 
values at this point in time.  This bug has been fixed now and the yaw rate 
values posted for day 047 (Feb 16, 1995) and later correctly represent the 
final estimates.

Due to potential problems, data from the following stations were not
considered for use in the global solution for the day indicated.  (For
geographical reasons, they may not have been used in any case.)

WARNING: Data from AREQ, BOR1, LAMA, NYAL, SANT, TROM excluded on day 043.
WARNING: Data from BOR1, LAMA, TROM excluded on day 044.
WARNING: Data from JOZE, LAMA, NYAL, TROM excluded on days 045 and 047.
WARNING: Data from NALL, TROM excluded on day 046.
WARNING: Data from GRAZ, JOZE, LAMA, MATE excluded on day 048.

In the following table, UT1R-UTC are the integrated values based on estimated
LODR values in the adjacent column.  See IGS Report No. 1498 (jpl07827.sum)
for details:

JPL ERP TABLE                                GPS week 788 (1995 Feb 12 - Feb 18)
     MJD  XPole  Ypole UT1R-UTC  LODR Xsig Ysig UTsig LODsig Nr Nf Nt  Xrt  Yrt 
            10**-5"      usec    us/d  10**-5"    us   us/d            10**-5"/d
49760.50  -9601  50615   288372  2509    4    6    13     13 32 10 25  191  169 
49761.50  -9514  50756   285889  2457    5    5    13     13 32 11 25  182  171 
49762.50  -9400  50906   283440  2442    5    5    12     12 32 10 25  185  144 
49763.50  -9241  51004   280991  2456    5    6    13     13 32 11 24  211  157 
49764.50  -9053  51173   278520  2486    5    5    13     13 32 11 24  231  168 
49765.50  -8837  51316   276028  2497    5    6    13     13 32 12 25  270  148 
49766.50  -8620  51474   273517  2526    4    5    12     12 32 12 25  228  175 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 788:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 788 (1995 Feb 12 - Feb 18)
      95  2 12   95  2 13   95  2 14   95  2 15   95  2 16   95  2 17   95  2 18
prn   3d rss (m)
  1       0.20       0.10       0.20       0.20       0.10       0.22       0.26
  2       0.22       0.12       0.19       0.14       0.10       0.12       0.15
  4       0.35       0.33       0.11       0.22       0.24       0.19       0.42
  5       0.32       0.15       0.10       0.27       0.30       0.27       0.31
  6       0.25       0.32       0.3                              0.4        0.30
  7       0.31       0.16       0.17       0.10       0.13       0.16       0.12
  9       0.32       0.20       0.19       0.13       0.16       0.17       0.15
 12       0.34       0.25       0.34       0.36       0.34       0.32       0.35
 14       0.32       0.21       0.18       0.17       0.11       0.16       0.14
 15       0.20       0.23       0.23       0.16       0.28       0.33       0.28
 16       1.09       1.25       0.15       0.28       0.31       0.23       0.14
 17       0.10       0.27       0.20       0.12       0.17       0.12       0.15
 18       0.28       0.12       0.14       0.18       0.14       0.20       0.21
 19       0.24       0.22       0.23       0.14       0.17       0.20       0.23
 20       0.17       0.12       0.12       0.21       0.13       0.17       0.13
 21       0.16       0.14       0.14       0.15       0.14       0.23       0.28
 22       0.10       0.11       0.12       0.15       0.17       0.10       0.18
 23       0.44       0.28       0.35       0.40       0.30       0.20       0.22
 24       0.53       0.23       0.11       0.21       0.21       0.20       0.23
 25       0.24       0.09       0.24       0.28       0.21       0.15       0.24
 26       0.25       0.34       0.14       0.11       0.11       0.17       0.18
 27       0.17       0.20       0.18       0.17       0.11       0.16       0.12
 28       0.28       0.29       0.10       0.17       0.16       0.21       0.11
 29       0.28       0.34       0.12       0.17       0.09       0.14       0.23
 31       0.23       0.29       0.20       0.12       0.19       0.22       0.28
_______________________
END ORBIT REPEATABILITY TABLE

The following table statistically summarizes this week's "engineering data", as
described in IGS Report No. 1528:

JPL ENGINEERING DATA SUMMARY TABLE           GPS week 788 (1995 Feb 12 - Feb 18)
 receiver/transmitter (dot means point positioned, * means fiducial site)
 |     days analyzed
 |     |      rms clock noise (ns)
 |     |      |           average clock solution (us)
 |     |      |           |           rms pseudorange (cm)
 |     |      |           |           |   (dot means pcode not analyzed)
 |     |      |           |           |           rms phase (mm)
 |     |      |           |           |           |           average arc (hr)
 |     |      |           |           |           |           |
 |___  |__    |_______    |_______    |___        |___        |__
ALBH   5.3    .205e+06   -53.5        40.5        4.68        2.66    
ALBH.  1.0    7.03        .513        44.0        6.00        5.14    
ALGO*  6.9    .           .           40.7        4.16        3.68    
AOA1.  6.9    163.       -.202        82.7        9.54        1.30    
AREQ   4.0    47.8       -.210        37.9        6.05        2.56    
AREQ.   .9    206.       -.939e-01    64.0        6.00        .155    
BLYT.  3.2    .289e+06    471.        62.8        8.87        .727    
BOGT   2.9    153.       -.112        50.1        7.00        1.25    
BOR1.  5.7    55.7       -1.39        48.0        7.01        3.11    
BRAN.  3.8    271.       -.213        103.        9.64        4.69    
BRIB.  5.4    .289e+06    514.        62.7        10.0        6.02    
BRMU   6.9    .750e+07   -.155e+05    42.6        4.87        3.12    
BRUS.  6.9    50.6        1.40        70.3        7.77        3.60    
CARR.  6.9    102.       -.170        70.4        9.12        2.19    
CAS1   5.9    52.0        865.        37.9        5.69        1.59    
CAS1.  1.0    15.0        834.        62.0        10.0        .982    
CASA.  4.4    .341e+07   -.157e+05      .         9.86        1.65    
CHIL.  2.5    .289e+06    440.        98.7        12.1        1.46    
CIT1.  6.9    108.       -.173        70.2        8.93        2.27    
CMBB.  5.8    .290e+06    511.        77.0        11.5        1.66    
CRFP.  1.6    .287e+06    553.        66.8        10.2        .330    
DAV1   6.9    52.9        163.          .         5.46        1.09    
DRAO.  6.9    50.5        4.37        49.4        7.98        5.76    
EISL   6.7    .488e+07   -.129e+05    40.3        7.18        2.29    
FAIR*  6.9    394.        2.84          .         5.77        1.37    
FARB.  2.6    .290e+06    449.        54.2        8.92        1.57    
FORT   5.7    54.8       -491.        52.2        7.93        2.98    
GODE.  6.9    50.8       -.505        60.9        8.95        2.61    
GOLD*  6.2    53.1       -.876          .         4.90        2.41    
GRAZ.  6.7    49.4       -3.85          .         8.19        1.37    
GUAM   6.9    122.       -.171        70.5        5.95        1.80    
HART*  6.8    52.7        4.85          .         5.32        2.21    
HARV.  6.3    .106e+06    317.        91.4        9.32        1.43    
HERS.  5.4    128.        133.          .         11.9        .910    
HOB2.  6.7    87.3       -.664        59.4        11.1        3.02    
HOLC.  2.4    .291e+06    431.        101.        12.3        1.58    
IISC    .8    .288e+06    485.        91.0        6.00        5.13    
JOZE.  4.9    21.2        464.        49.6        7.84        4.77    
JPLM.  6.9    59.4        609.        46.5        8.40        2.97    
KERG   6.8    172.       -113.          .         5.15        2.40    
KIRU.  6.9    50.0       -.984        68.7        10.7        1.29    
KIT3   3.8    .220e+04   -.167e-01    88.2        4.28        3.16    
KOKB*  6.2    .834e+05   -18.1          .         5.89        2.49    
KOSG*  5.7    57.4        1.18          .         3.85        3.25    
KOUR   6.9    50.5        11.0          .         8.73        1.22    
KRAK.  2.8    192.       -.174        84.0        9.36        1.18    
LAMA.  4.6    86.3       -.203          .         7.80        2.79    
LBCH.  6.8    373.       -.152        94.8        9.14        1.04    
LONG.  1.6    .289e+06    483.        169.        12.2        .857    
MADR*  6.8    51.8        .925e-01      .         4.88        3.12    
MAS1   6.1    54.4       -7.22        54.6        4.21        3.32    
MATE   6.0    55.4        .640          .         4.39        2.11    
MATE.   .1    .227e-01    .836          .         4.00        .190    
MATH.  4.1    .284e+06    495.        48.5        9.13        1.66    
MCM4   6.9    96.1       -.160          .         5.77        1.65    
MDO1   1.9    .859       -.490        35.0        4.00        3.19    
MDO1.  4.9    60.0       -.438        60.4        9.52        2.27    
METS   1.0    .569e-01   -.459          .         4.00        2.45    
METS.  4.3    58.9       -.494          .         8.36        .968    
MONP.  2.5    .289e+06    478.        95.3        9.55        .363    
NLIB.  6.9    50.7       -1.62        56.3        7.96        2.79    
NYAL   1.0    12.0        .166e-01      .         6.00        1.09    
NYAL.  4.1    45.8       -.205e-01      .         8.61        1.16    
OAT2.  6.8    225.       -.179        54.9        7.37        .469    
ONSA   6.9    49.8        9.61        39.3        4.00        2.60    
PAMA   6.7    59.9        60.4          .         12.2        .280    
PERT   6.9    51.5        82.3        52.0        5.16        3.21    
PIE1.  6.9    50.9       -4.67        62.0        8.55        1.92    
PIN1.  3.0    .290e+06    468.        61.6        9.87        .623    
POTS.  6.7    89.9       -.170        83.8        7.76        1.74    
PVEP.  6.5    .284e+06    507.        124.        13.8        3.70    
QUIN.  6.8    51.4       -1.86        71.1        9.22        1.91    
RCM5   6.9    51.1       -.941          .         5.22        2.54    
SANT*  5.9    5.73        .194          .         6.00        2.14    
SANT.  1.0    130.        .367          .         14.0        2.34    
SHAO   6.9    .888e+04   -21.4        44.1        4.35        1.51    
SIO3.  3.8    .288e+06    493.        69.7        9.19        .873    
STJO   6.6    .319e+06    214.        62.9        4.59        3.26    
TAIW.  6.7    52.3        .135e+04      .         9.80        1.74    
TIDB*  6.8    51.2       -.340          .         5.89        2.15    
TMGO.  5.1    822.       -.178        95.0        8.49        1.50    
TRAK.  3.0    .290e+06    479.        92.0        10.8        .665    
TROM*  2.0    4.43        998.          .         5.51        2.08    
TROM.  3.2    64.2        972.          .         8.82        .702    
TSKB   6.9    50.8        70.2        49.5        4.74        3.08    
UCLP   1.0    84.5       -.115        44.0        4.00        4.53    
UCLP.  5.2    99.4       -.183        62.8        8.69        2.09    
UPAD.  1.2    .284e+06    520.        77.7        7.00        2.83    
USC1.  6.8    123.       -.174        72.4        8.72        2.20    
USUD.  6.9    50.5       -.355e-01    51.7        8.37        2.41    
VILL.  6.9    935.        4.44        67.3        8.03        5.42    
VNDP.  2.5    .289e+06    453.        56.2        9.68        1.66    
WEST.  6.9    50.7        .723        74.1        8.18        1.80    
WLSN.  3.6    757.       -.848e-01    88.6        9.84        .845    
YAR1*  6.9    50.4       -.246          .         4.76        2.60    
YELL*  6.9    298.       -2.77        42.5        5.88        1.02    
ZIMM.  3.1    .288e+06    510.        64.7        8.40        3.49    
PRN01  6.9    97.4       -5.07        56.9        7.58        1.90    
PRN02  6.9    94.1       -145.        63.2        7.29        1.57    
PRN04  6.9    96.5        12.2        71.1        9.01        1.17    
PRN05  6.9    96.6        89.9        63.9        7.90        1.31    
PRN06  4.9    103.        88.6        59.3        7.38        1.88    
PRN07  6.9    95.5        701.        57.3        8.40        1.43    
PRN09  6.9    93.9       -21.8        70.6        7.61        1.29    
PRN12  6.9    50.2       -341.        70.8        7.03        1.76    
PRN14  6.5    95.8        7.99        62.3        8.49        1.67    
PRN15  6.9    50.3        160.        77.4        7.74        1.42    
PRN16  6.7    98.4       -80.4        78.5        11.1        1.42    
PRN17  6.9    97.2       -73.7        65.0        7.14        1.83    
PRN18  6.9    96.5       -7.32        65.3        8.23        1.59    
PRN19  6.9    93.1        200.        66.4        8.62        1.69    
PRN20  6.9    95.7        136.        69.2        7.47        1.91    
PRN21  6.5    98.6       -13.9        63.7        8.12        1.67    
PRN22  6.9    94.6        194.        73.4        7.93        1.52    
PRN23  6.5    96.7        5.87        61.5        7.75        1.85    
PRN24  6.9    95.9        458.        63.5        8.37        1.29    
PRN25  6.9    95.5       -.228        62.3        7.32        1.79    
PRN26  6.9    95.4       -61.6        78.8        8.10        1.28    
PRN27  6.9    96.1        20.1        60.1        7.49        1.53    
PRN28  6.9    49.9        66.6        72.9        7.93        1.53    
PRN29  6.9    94.7        5.96        64.8        7.52        1.65    
PRN31  6.9    93.6        72.5        72.8        7.74        1.62    
_______________________
END ENGINEERING DATA SUMMARY 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
      95  2 12   95  2 13   95  2 14   95  2 15   95  2 16   95  2 17   95  2 18
prn   3d rss (m)
  1       3.8        4.4        4.7        5.1        5.2        5.2        4.8 
  2      10.9        5.3        9.6        9.5        9.7       10.5        7.2 
  4       7.8        7.3        6.3        5.6        6.7        7.2        6.3 
  5       5.1        6.6        5.5        4.7        5.7        7.4        6.6 
  6       6.2        6.2        5.7                             20.9       11.4 
  7       6.9        6.4        5.3        5.5        6.0        5.7        6.0 
  9       8.3        7.4        6.2        5.9        6.5        8.0        8.3 
 12       4.5        3.9        2.2        3.1        4.1        4.2        3.0 
 14       7.4        9.1       11.2        9.0        6.4        8.8        6.8 
 15       5.7        6.6        6.8        6.4        4.6        4.8        5.6 
 16       7.6       10.9       11.9       12.8       10.7       11.7       12.0 
 17       4.1        6.0        7.5        7.0        6.2        7.4        7.5 
 18       5.8        7.6        9.2        5.9        6.7        8.8        6.2 
 19       8.6        7.8       15.0        5.6        6.7        4.9        5.6 
 20       7.6        6.7        5.8        6.3        6.2        7.4        5.4 
 21       8.6        8.5       11.0       10.8        8.5        8.6       10.1 
 22      14.2        6.8        7.5        8.4        7.2        6.3        5.8 
 23       6.1       12.6       15.2       11.6        7.6       12.4        9.6 
 24       5.9        7.5        8.2        7.7        6.4        5.7        5.5 
 25       7.8        6.0        5.5        8.1        7.5        5.8        4.5 
 26       2.6        3.2        2.5        2.1        3.6        3.8        3.2 
 27       8.3        6.3       10.0       10.0        8.4        8.1        7.8 
 28       3.9        3.9        3.4        3.4        3.4        3.8        3.8 
 29       4.0        4.7        3.3        2.3        3.2        5.9        4.7 
 31       3.2        3.9        3.2        3.9        3.9        3.3        3.0 
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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