Subject: [IGSREPORT-3075] Wk 0874 JPL Analysis Report (Resubmission)
From: D C Jefferson
Date: Thu, 17 Oct 1996 17:34:04 PDT

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IGS Electronic Report    Thu Oct 17 17:34:04 PDT 1996      Message Number 3075
******************************************************************************

Author: D C Jefferson
Subject: Wk 0874 JPL Analysis Report (Resubmission)

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JPL ANALYSIS REPORT   GPS-WEEK 0874 (DAYS 280-286, DATES 1996 Oct 06 - Oct 12)
                                 (Resubmission)
******************************************************************************

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/0874.  These files have also been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl08747.sum         This text file.
jpl08747.erp         Earth rotation parameters for GPS week 874.
jpl08747.snx         Ground station coordinates for GPS week 874, SINEX format.
jpl0874[0-6].sp3     GPS ephemerides for GPS week 874, sp3 format.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 13.0 cm
                           (excluding deweighted satellites)

Data from PRN10 and PRN30 continue to appear mismodeled; we have deweighted
data from these two satellites for most or all of this week.  (Due to
implementation time and some initial software anomalies, data from PRN10
were used with normal weighting on day 280.  We have chosen to remove this
satellite from the corresponding orbit product jpl08740.sp3.)

According to the file nanu1996.mes obtained from the IGS CBIS, PRN21 was
unusable on days 281 through 284 for maintenance (no maneuver).  Data from
this satellite were used in our analyses of these days; however, we have
removed its solution from the corresponding orbit products for days 281 and
282 (jpl08741.sp3 and jpl08742.sp3) due to atypically high orbit repeatability.

Due to potential problems, data from stations mentioned below 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 PRN10 deweighted days 281-286.
WARNING: Data from PRN30 deweighted for the entire GPS week 874.
WARNING: Data from BRAN, CSN1, GOLD, SNI1, TIDB excluded day 280.
WARNING: Data from CSN1, DGAR, FMC2, GOLD, HBRK, TIDB excluded day 281.
WARNING: Data from DGAR, FMC2 excluded day 282.
WARNING: Data from CHIL, CRFP, DGAR excluded day 283.
WARNING: Data from DGAR, KRAK, NOTO, TROM excluded day 284.
WARNING: Data from DGAR, KRAK, LPGS, NOTO, POTM excluded day 285.
WARNING: Data from KELY, MEDI, NOTO excluded day 286.

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 874 (1996 Oct 06 - Oct 12)
     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
50362.50  25715  20800    54017  1908    3    3     9      9 37 11 26 -132 -315 
50363.50  25526  20479    52077  1972    3    3     9      9 37 12 26 -189 -326 
50364.50  25329  20214    50102  1977    3    3     9      9 37 12 26 -212 -250 
50365.50  25106  19949    48103  2021    3    4    10     10 37 12 26 -199 -313 
50366.50  24896  19670    46077  2032    3    3     9      9 37 12 26 -235 -299 
50367.50  24642  19350    44070  1982    3    4    10     10 37 12 26 -238 -304 
50368.50  24386  19031    42025  2108    3    3     9      9 37 12 26 -242 -313 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 874:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 874 (1996 Oct 06 - Oct 12)
      96 10  6   96 10  7   96 10  8   96 10  9   96 10 10   96 10 11   96 10 12
prn   3d rss (m)
  1       0.30       0.25       0.20       0.22       0.16       0.08       0.10
  2       0.17       0.10       0.10       0.10       0.08       0.08       0.12
  3       0.21       0.22       0.18       0.13       0.13       0.24       0.18
  4       0.19       0.20       0.09       0.20       0.14       0.17       0.08
  5       0.11       0.18       0.14       0.11       0.12       0.09       0.08
  6       0.12       0.10       0.15       0.08       0.12       0.13       0.12
  7       0.10       0.10       0.08       0.12       0.16       0.14       0.11
  9       0.09       0.09       0.11       0.11       0.11       0.06       0.09
 10       1.47       1.38       2.29       2.42       1.68       1.46       2.60
 14       0.11       0.12       0.22       0.45       0.24       0.11       0.06
 15       0.12       0.10       0.16       0.19       0.07       0.06       0.07
 16       0.19       0.18       0.08       0.12       0.20       0.17       0.09
 17       0.30       0.40       0.42       0.24       0.14       0.22       0.16
 18       0.09       0.12       0.16       0.15       0.11       0.09       0.08
 19       0.15       0.16       0.10       0.13       0.15       0.21       0.19
 21       0.16       1.96       1.99       0.11       0.08       0.06       0.09
 22       0.13       0.08       0.08       0.12       0.09       0.07       0.10
 23       0.38       0.46       0.30       0.28       0.16       0.10       0.14
 24       0.17       0.17       0.09       0.09       0.25       0.19       0.10
 25       0.22       0.19       0.19       0.21       0.15       0.10       0.11
 26       0.15       0.23       0.22       0.24       0.22       0.17       0.27
 27       0.15       0.12       0.07       0.07       0.10       0.12       0.12
 28       0.14       0.36       0.23       0.14       0.10       0.13       0.11
 29       0.10       0.12       0.16       0.16       0.16       0.11       0.07
 30       5.69       4.58       4.79       4.49       4.05       3.88       3.78
 31       0.18       0.12       0.16       0.23       0.11       0.12       0.15
_______________________
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 874 (1996 Oct 06 - Oct 12)
 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)
 |     |      |           |           |           |           |
 |___  |__    |_______    |_______    |___        |___        |__
ALGO*  6.8    .           .           46.6        4.76        2.61    
ANKR    .9    107.       -.539        56.0        5.00        2.55    
AREQ   1.0    95.5       -.487        43.0        4.00        2.19    
ASC1   5.9    105.       -.509        79.2        5.00        1.66    
BAHR   6.7    .394        266.        46.2        4.46        3.12    
BRAZ   3.9    .312e+04   -.588        60.1        5.28        2.78    
BRUS   6.9    .239        3.71        61.0        4.15        2.55    
CHAT   7.0    100.       -.501        80.6        5.00        2.76    
CHUR   1.0    4.70        174.        32.0        5.00        1.47    
CRO1   7.0    270.       -.513        41.5        6.65        2.11    
DGAR    .5    .131e+06   -18.2          .         4.00        .831    
EISL   6.8    .688e+07   -.151e+05    39.5        6.16        2.72    
ENG1   1.8    .289e+06    510.        97.5        11.0        1.69    
FAIR*  7.0    156.       -1.85        37.4        5.11        2.18    
FLIN   6.0    79.0       -.490        59.7        4.72        2.41    
FORT   2.9    .106       -.522        50.0        6.36        2.74    
GOL2*  7.0    .120        .156        44.6        4.73        2.68    
GUAM   7.0    108.       -.500        57.3        7.61        2.35    
HART*  7.0    79.3        1.56        45.7        4.31        2.61    
HKLO   1.0    .289e+06    505.        47.0        6.00        2.31    
IRKT   4.5    .941       -.375        53.4        4.49        2.56    
KELY    .7    .427e+04   -.732        58.0        5.00        1.89    
KERG   7.0    197.       -17.8          .         5.15        2.33    
KIRU   3.0    87.4       -.843        47.4        6.00        1.91    
KIT3   7.0    .312e+04   -.628        53.9        4.45        3.04    
KOKB*  6.9    418.        1.22        73.2        6.62        2.57    
KOSG*  7.0    3.75        .331        44.6        4.07        2.18    
KWJ1   7.0    78.4       -.500        56.9        8.00        1.61    
LHAS   5.7    .138e+05   -.463        71.6        5.22        2.30    
MADR*  4.3    1.26       -.159          .         5.00        2.13    
MALI   1.8    .182e+05   -40.2          .         7.00        2.05    
MAS1   5.9    .170e+04   -5.41        46.1        4.36        2.33    
MCM4   7.0    113.       -.496        43.8        5.00        1.70    
MDVO    .9    .361        190.        67.0        6.00        2.61    
MKEA   6.0    .837e-01   -.741        43.7        5.69        2.78    
MOIN   1.8    78.9       -.533        57.0        6.00        1.71    
OHIG   5.9    .223e+05   -2.34        51.6        4.43        1.30    
PAMA   6.9    .221e+04   -.396          .         9.43        2.16    
PERT   7.0    2.40       -1.22        47.7        4.45        2.70    
PIE1   1.0    .247       -.179        40.0        4.00        2.70    
RCM5   1.0    112.       -.435        60.0        7.00        2.14    
REYK   5.8    82.6       -.513        57.5        6.16        1.78    
SANT*  6.8    317.       -.351        45.2        4.45        2.29    
STJO   4.9    85.0       -.377        37.6        4.06        2.14    
THU1   3.7    74.8       -.504        45.3        5.26        2.35    
TID2*  7.0    .115       -.574        43.2        6.08        2.69    
TROM*  1.8    9.13        6.52          .         5.50        1.21    
USUD   7.0    367.        1.50        33.7        4.94        2.76    
WTZR*  5.8    141.        .639        61.4        4.00        2.69    
WUHN   2.8    4.06       -135.        45.3        5.34        2.52    
YAR1*  6.8    .238e+04    17.2          .         3.67        2.04    
YELL*  7.0    .397       -2.23        45.2        5.22        1.69    
PRN01  7.0    81.1        3.82        53.8        5.44        2.49    
PRN02  7.0    82.9       -298.        54.6        5.45        2.44    
PRN03  7.0    82.4        59.3        54.1        5.62        2.34    
PRN04  7.0    80.2        48.0        52.0        5.59        2.17    
PRN05  7.0    80.4        61.3        51.2        5.45        2.48    
PRN06  7.0    82.1        2.13        50.0        5.31        2.75    
PRN07  7.0    79.4        728.        55.5        5.29        2.23    
PRN09  7.0    81.9       -13.6        56.2        5.31        2.26    
PRN10  1.0    75.1        202.        55.0        6.00        2.13    
PRN14  7.0    80.5        14.9        48.0        5.91        2.55    
PRN15  7.0    3.66        348.        57.3        5.59        2.31    
PRN16  7.0    82.8        28.3        52.3        5.30        2.33    
PRN17  7.0    80.1       -128.        54.9        5.15        2.37    
PRN18  7.0    81.3        12.8        49.3        5.45        2.53    
PRN19  7.0    80.1        136.        52.6        5.31        2.45    
PRN21  6.8    .428e+06    371.        56.9        5.30        2.22    
PRN22  7.0    82.0        342.        48.4        5.59        2.48    
PRN23  7.0    82.3        4.23        56.3        5.29        2.16    
PRN24  7.0    80.9        325.        53.1        5.87        2.31    
PRN25  7.0    82.2       -3.95        51.0        5.62        2.36    
PRN26  7.0    82.0       -50.2        51.6        5.30        2.38    
PRN27  7.0    80.1        3.84        50.9        5.31        2.49    
PRN28  7.0    2.36        110.        60.0        4.90        2.75    
PRN29  7.0    81.2        1.09        45.9        5.30        2.76    
PRN31  7.0    80.4        69.9        52.9        5.59        2.34    
_______________________
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
      96 10  6   96 10  7   96 10  8   96 10  9   96 10 10   96 10 11   96 10 12
prn   3d rss (m)
  1      10.1        7.2        6.3        5.9        7.5        6.7        7.2 
  2       3.1        4.0        4.2        3.5        4.5        3.8        3.2 
  3       4.4        4.5        5.5        5.7        5.3        4.9        4.9 
  4       4.4        4.4        4.1        4.4        4.5        4.7        4.4 
  5       3.1        2.9        2.7        2.7        3.5        3.2        2.8 
  6       8.9        6.8        6.9        6.2        6.8        6.9        6.6 
  7       5.0        4.3        2.3        1.8        2.1        2.1        3.1 
  9       4.3        3.4        3.8        3.5        4.3        3.7        4.0 
 10      11.8       13.3       13.9       14.8       14.1       10.7       10.9 
 14       3.3        3.2        3.2       11.0        5.4        3.2        2.8 
 15       3.1        3.0        2.5        3.3        2.9        2.8        3.1 
 16       7.6        5.3        2.3        3.4        3.9        4.4        3.4 
 17       2.4        2.3        2.6        2.8        2.6        4.3        4.7 
 18       7.8        3.6        4.0        3.0        2.2        2.8        4.5 
 19       3.3        2.7        3.1        2.9        7.5        4.3        1.8 
 21       4.3        3.5        2.6        2.8        2.7        2.4        2.0 
 22       4.7        4.3        4.1        3.8        4.0        4.5        5.0 
 23       3.0        3.0        2.7        4.3        2.2        1.8        3.4 
 24       4.3        4.3        4.2        4.4        4.6        4.8        5.0 
 25       7.6        5.6        6.7        5.8        6.2        7.1        5.3 
 26       4.5        3.6        2.8        3.8        3.9        3.1        3.0 
 27       7.1        6.2        9.1        7.0        7.1        6.9        6.8 
 28       6.5        5.4        5.8        4.1        3.4        3.5        5.2 
 29       3.2        3.3        2.8        3.6        3.0        3.1        4.0 
 30      10.1        7.1        7.6        9.6        7.8        6.0        5.7 
 31       3.8        2.9        2.8        3.2        2.9        2.7        2.9 
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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