Subject: [IGSREPORT-5611] Wk 0988 JPL Analysis Report
From: D C Jefferson
Date: Mon, 28 Dec 1998 13:40:02 PST

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IGS Electronic Report    Mon Dec 28 13:40:02 PST 1998      Message Number 5611
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Author: D C Jefferson
Subject: Wk 0988 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0988 (DAYS 347-353, DATES 1998 Dec 13 - Dec 19)
******************************************************************************

Submitted by the JPL IGS/FLINN Analysis Team:

D C Jefferson, Y E Bar-Sever, M B Heflin, M M Watkins, F H Webb, J F Zumberge

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 (137.78.60.30),
directory pub/jpligsac/0988.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09887.sum         This text file.
jpl09887.erp         Earth rotation parameters for GPS week 988.
jpl09887.snx         Ground station coordinates for GPS week 988, SINEX format.
jpl0988[0-6].sp3     GPS ephemerides for GPS week 988, sp3 format.
jpl0988[0-6].tro     Ground station troposphere estimates for GPS week 988.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 10.0 cm

According to the file nanu1998.mes obtained from the IGS CBIS, PRN07 was
unusable on days 348 and 349.  Data from this satellite were mismodeled on
these and days 350 through 353 as well, and have been excluded from all of
these days' analyses accordingly. 

A large clock discontinuity (reset) of about 71 microseconds was detected
for PRN21 at approximately 06:15 on day 349.  A similar reset of about 119
microseconds was detected for PRN29 at approximately 06:15 on day 352.  It
appears that the drift of this satellite's clock simultaneously experienced
a shift from about -49 ps/s to about +53 ps/s.

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: PIE1 (not USNO) used as reference clock days 347 and 349.
WARNING: Data from COCO, CRO1, FORT, HARK, HOLB, KSTU, MKEA, NICO excluded day           347.
WARNING: Data from PRN07, COCO, CRO1, HARK, HOLB, MKEA, NICO excluded day 348.
WARNING: Data from PRN07, CASA, HARK, HOLB, HOLC, MKEA excluded day 349.
WARNING: Data from PRN07, CASA, HARK, HOLB, NYAL excluded day 350.
WARNING: Data from PRN07, CASA, HARK, HOLB excluded day 351.
WARNING: Data from PRN07, HARK excluded day 352.
WARNING: Data from PRN07, BOR1, COCO, HARK, HOLB, KOUR, VILL excluded day 353.

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 988 (1998 Dec 13 - Dec 19)
version 2           
     MJD   XPole   Ypole  UT1R-UTC   LODR Xsg Ysg UTsg LOsg Nr Nf Nt   Xrt   Yrt
         10**-6" 10**-6"      .1us .1us/d 10**-6" .1us .1us/d          10**-6"/d
51160.50  137358  321117  -2773476  10673  45  50  170  170 37  0 27  -280 -2136
51161.50  137378  319361  -2784257  10888  47  53  179  179 37  0 26  -409 -1957
51162.50  137486  317743  -2794941  10481  49  52  181  181 37  0 26  -210 -1486
51163.50  137775  316487  -2805451  10538  48  55  186  186 37  0 26   203 -1515
51164.50  138479  315185  -2815834  10228  46  50  181  181 37  0 26   675 -1590
51165.50  139610  313972  -2825976  10056  47  55  179  179 37  0 26   840 -1441
51166.50  140751  312984  -2835964   9921  54  59  191  191 37  0 26  1012 -1361
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 988:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 988 (1998 Dec 13 - Dec 19)
      98 12 13   98 12 14   98 12 15   98 12 16   98 12 17   98 12 18   98 12 19
prn   3d rss (cm)
  1       9         14          5          6         23         25         15   
  2       9          8         16         14         14         11         16   
  3       4          8          8          5          7          9          5   
  4       6          6         10          7          9          9          9   
  5      10         11         16          7          9          8         15   
  6      14         13         14          8          7         11         12   
  7      15                                                                     
  8      19         10         11         10          7          8          9   
  9      10          8          9          9          9         11          8   
 10       7          6         15         14         10          7         14   
 13      20         10         14         12         17         11         15   
 14      23         16         23         20         18         23         25   
 15       7          8         13         10         13         14          9   
 16      10         14         25         21         15          6         20   
 17       8         10          7          8         10          7          3   
 18      13         16         25         18         20         14         22   
 19      17         17         26         20         16         10         19   
 21       7          8         10         10          7         10          9   
 22       7          6          6         11          7          7          8   
 23      12          9         12          9          9         10          8   
 24      10          5          8         15          7          9          8   
 25       5         11         15         13          7         10         11   
 26      10          7          6         11          7          7          5   
 27      10          6         16          7         13          6         13   
 29       8         15          6          6         14         14         14   
 30      10          9         11          7          9          7         10   
 31       9         13         13         11         15         21          9   
_______________________
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 988 (1998 Dec 13 - Dec 19)
 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*  7.0    .173       -.713        51.7        3.61        2.71    
AOML   1.0    .176e+04   -.164        53.0        5.00        2.51    
AREQ*  6.0    128.       -.842        61.7        4.19        2.24    
ASC1   2.9    .204e+05    .355e-01      .         5.04        1.43    
AUCK   1.0    101.       -1.04        58.0        5.00        2.49    
BAHR   3.9    1.06        256.        42.0        4.28        3.04    
BOGT   1.0    157.        .107        70.0        6.00        1.67    
CAS1   6.7    17.9        .147e+04    39.2        5.46        1.04    
CASA   1.0    23.7        8.34        48.0        6.00        2.59    
CHAT   1.0    113.        .121        82.0        5.00        2.70    
COCO   3.0    105.       -1.04        67.3        5.68        1.47    
CRO1   4.0    152.       -1.05        49.5        5.52        1.87    
DAV1*  5.7    153.       -.844          .         4.66        .957    
DGAR   2.8    230.       -1.04        79.1        4.67        1.53    
EISL   7.0    131.       -.700        62.6        5.15        2.92    
FAIR*  7.0    6.71       -.690        52.0        4.15        2.20    
FORT*  5.3    41.6       -.963        82.7        6.00        1.38    
GALA   4.7    480.       -1.03        62.2        4.23        1.55    
GOL2*  6.6    .177e+04   -1.03        58.7        4.00        2.10    
GOUG   2.8    .289e+06    501.        60.7        4.38        2.86    
GUAM*  6.0    132.       -.680        82.8        6.68        2.02    
HOB2*  2.0    .868e-01   -3.42        53.5        4.53        2.78    
HRAO   6.0    391.        1.35        55.1        5.39        2.36    
IISC   6.0    99.5       -.657        77.9        4.85        2.28    
IRKT*  3.5    .162        .375        49.0        4.73        2.49    
KELY   3.0    89.8       -1.05          .         5.32        1.50    
KERG*  5.5    .237e+04    67.9          .         5.72        2.28    
KOKB*  6.8    158.        1.65        70.1        5.15        2.66    
KUNM   5.0    165.       -.813        67.3        4.00        2.39    
KWJ1*  7.0    338.       -.725        78.7        6.44        1.84    
LPGS    .8    190.        .123        67.0        5.00        2.86    
MAC1*  5.8    95.4       -.844        44.7        4.00        2.13    
MAD2*  6.8    789.        1.06        61.3        5.16        2.24    
MAG0   3.0    .289e+06    473.        31.0        4.36        2.47    
MALI*  6.9    .257e+04    12.9        89.3        6.87        1.96    
MATE*  3.9    .139       -3.93        46.2        4.00        2.83    
MCM4   1.0    88.0        .141        49.0        5.00        1.15    
MDVO   1.9    .221        225.        72.0        6.00        2.04    
MEDI   1.0    .172       -.878        30.0        3.00        3.27    
METS   1.0    .758e-01   -6.71        46.0        4.00        2.58    
NTUS   2.5    104.       -.303        91.4        5.00        1.41    
NYA1   1.7    71.1       -.988        39.0        6.00        1.14    
ONSA*  5.9    .873e-01   -2.24        41.5        4.00        2.15    
PETP    .9    105.        .119        63.0        5.00        2.67    
PIE1*  2.0    .           .           52.0        4.00        2.43    
POL2   6.0    81.4       -.652        57.5        4.00        2.42    
RAMO   1.0    .280e+06    394.        45.0        5.00        2.32    
REYK    .9    80.1       -1.04        78.0        6.00        2.14    
SANT*  3.9    568.       -1.04          .         3.56        2.46    
SHAO*  1.0    88.4        .147        48.0        4.00        2.63    
SUTH   1.0    110.       -1.05        64.0        5.00        2.26    
THTI   4.9    .289e+06    498.        74.2        7.68        2.34    
THU1*  1.0    127.        .126        43.0        6.00        1.30    
TID2*  7.0    .934e-01   -.521        49.3        5.87        2.20    
TSKB*  4.8    1.57       -.511        46.4        4.00        2.83    
USNO   5.1    .           .           69.9        5.21        2.53    
USUD   5.0    .126       -.929        43.8        4.00        2.60    
VESL   6.5    .288e+06    505.        64.1        4.59        1.99    
WTZR*  7.0    .709e-01   -2.85        63.0        4.60        2.90    
YAKA    .9    103.       -1.05        59.0        4.00        2.19    
YAKZ   1.8    .289e+06    447.        42.0        5.00        2.50    
YAR1*  7.0    82.8       -.712        44.8        4.93        2.08    
YELL*  7.0    .183       -.690        47.3        4.30        1.88    
PRN01  7.0    82.1        67.7        59.0        5.16        2.19    
PRN02  7.0    80.4       -2.14        64.9        5.00        2.16    
PRN03  7.0    80.5        74.8        61.5        5.00        2.09    
PRN04  7.0    83.3        333.        57.3        5.00        1.92    
PRN05  7.0    80.0        175.        58.4        5.00        2.12    
PRN06  6.9    80.8       -1.15        57.4        5.00        1.73    
PRN07  1.0    80.7        802.        61.0        5.00        2.39    
PRN08  7.0    82.4        579.        57.3        5.00        1.98    
PRN09  7.0    79.8       -23.5        57.0        5.00        2.29    
PRN10  6.8    79.7        29.2        67.0        5.31        1.87    
PRN13  7.0    78.3       -398.        60.6        5.00        2.26    
PRN14  6.6    83.8        9.00        60.3        4.87        2.08    
PRN15  7.0    3.36        630.        60.5        4.87        2.29    
PRN16  6.7    79.1        92.1        63.0        5.00        1.97    
PRN17  7.0    81.1       -198.        60.3        5.00        2.18    
PRN18  7.0    83.0        18.9        62.9        5.16        1.98    
PRN19  7.0    80.8       -87.1        60.8        4.60        2.01    
PRN21  6.5    .518e+04    28.5        61.7        5.00        2.00    
PRN22  7.0    80.9        488.        60.9        5.00        2.03    
PRN23  6.6    80.6        6.77        60.5        5.00        2.08    
PRN24  6.8    79.3        528.        57.3        5.00        1.71    
PRN25  6.9    81.4       -.704        56.0        5.00        1.91    
PRN26  7.0    81.1        714.        59.1        5.15        2.27    
PRN27  7.0    83.3        4.55        60.9        5.00        2.30    
PRN29  6.9    .100e+05    111.        60.0        4.75        2.25    
PRN30  7.0    80.8       -1.68        56.7        5.00        1.98    
PRN31  7.0    80.6        10.3        60.2        5.00        2.27    
_______________________
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
      98 12 13   98 12 14   98 12 15   98 12 16   98 12 17   98 12 18   98 12 19
prn   3d rss (cm)
  1     596        584        414        510        555        772        534   
  2     829       1393       1190        547        788        573        430   
  3     429        280        351        288        371        276        420   
  4     480        380        217        168        264        294        328   
  5     430        521        502        428        411        445        519   
  6     720        740        619        673        804        822        780   
  7     622                                                                     
  8     170        267        233        244        341        401        533   
  9     272        426        247        432        610        570        446   
 10     364        335        356        435        420        519        512   
 13     305        427        346        238        250        242        370   
 14     775       1163       1080        776        502        851        478   
 15     232        389        229        627        425        436        305   
 16     585        773        464        589        473        621       1653   
 17     192        180        174        343        303        207        246   
 18     156        248        612        449        628        559        307   
 19     283       1321       1243        167        498        299        284   
 21     614        469        401        354        318        713        445   
 22     283        855        374        409        700        504        415   
 23     860       1330       1206        627        979       1038       1317   
 24     237        202        169        255        395        504        439   
 25     340        344        375        495        922        522        526   
 26     397        254        438        332        265        288        340   
 27     298        266        330        364        337        548        444   
 29     288        340        294        322        330        245        320   
 30     284        397        388        379        361        392        431   
 31     265        640        575        301        807        199        570   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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