Subject: [IGSREPORT-5382] Wk 0976 JPL Analysis Report
From: D C Jefferson
Date: Mon, 5 Oct 1998 11:28:58 PDT

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IGS Electronic Report    Mon Oct  5 11:28:58 PDT 1998      Message Number 5382
******************************************************************************

Author: D C Jefferson
Subject: Wk 0976 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0976 (DAYS 263-269, DATES 1998 Sep 20 - Sep 26)
******************************************************************************

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/0976.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09767.sum         This text file.
jpl09767.erp         Earth rotation parameters for GPS week 976.
jpl09767.snx         Ground station coordinates for GPS week 976, SINEX format.
jpl0976[0-6].sp3     GPS ephemerides for GPS week 976, sp3 format.
jpl0976[0-6].tro     Ground station troposphere estimates for GPS week 976.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 11.0 cm

According to the file nanu1998.mes obtained from the IGS CBIS, PRN14 was
unusable on days 265 and 266.  Data from this satellite did not meet our
initial orbit convergence criteria on day 265, and were mismodeled on this
and the following day.  These data have been excluded from the analyses of
these two days accordingly.  Similarly mismodeled were PRN25 and PRN29 on
day 267 and PRN29 on day 268; these satellites have also been excluded on
the appropriate days.

Beginning this week, we add four new sites as candidate stations.  As with
other sites, these stations are given the opportunity to participate in the
orbit and clock solution as the global site distribution varies.  The
following nominal coordinates were assumed:

                                         X (m)         Y (m)         Z (m)
GOUG (Gough Island, St. Helena)     4795578.6137  -835299.4938 -4107634.0915
IAVH (Rabat, Morocco)               5256828.2559  -633054.1493  3544324.5931
RAMO (Mitzpe Ramon, Israel)         4514722.0526  3133507.8096  3228024.6286
VESL (Vesleskarvet, Antarctica)     2009329.7441   -99741.4687 -6033158.5236

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 COCO, DAV1, HARK excluded day 263.
WARNING: Data from CASA, COCO, HARK, HOB2, IAVH excluded day 264.
WARNING: Data from PRN14, CASA, COCO, HARK, HOB2, IAVH excluded day 265.
WARNING: Data from PRN14, CASA, HOB2, IAVH, KSTU, NYAL excluded day 266.
WARNING: Data from PRN25, PRN29, COCO, HOB2, IAVH, TROM excluded day 267.
WARNING: Data from PRN29, COCO, FORT, HOB2, NOUM, NYAL, VNDP excluded day 268.
WARNING: Data from COCO, HARK, HNPT, NOUM excluded day 269.

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 976 (1998 Sep 20 - Sep 26)
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
51076.50  111474  460352  -1602227  10834  47  55  196  196 37  0 27  1504 -1060
51077.50  113036  458843  -1613378  11468  48  55  198  198 37  0 27  2092 -1617
51078.50  114979  457324  -1624770  11316  46  54  202  202 37  0 26  1744 -1976
51079.50  116888  455663  -1635536  10217  51  59  214  214 37  0 26  1041 -1746
51080.50  118569  454334  -1646212  11135  56  61  222  222 37  0 25  1861 -1658
51081.50  119947  453220  -1657510  11460  59  64  225  225 37  0 26   621 -1588
51082.50  121004  451997  -1669134  11789  54  53  209  209 37  0 27   837 -1334
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 976:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 976 (1998 Sep 20 - Sep 26)
      98  9 20   98  9 21   98  9 22   98  9 23   98  9 24   98  9 25   98  9 26
prn   3d rss (cm)
  1       8         13         16         12          7         16         14   
  2      10          7          9         11          9          6         12   
  3      10         11         18         12         25         16         14   
  4       7          5         10         10         13         14          9   
  5       8          8         12         11          6         16         14   
  6       9          8          9         10         12         12         10   
  7      10          6         11         12          9          6         11   
  8       8         13         11         13         15         28         10   
  9       8         14         13         11         14         12         11   
 10      13         12         13         12          8          9          5   
 13       8         12         10          8          6          7          4   
 14       9         10                               10         13          9   
 15       7          6         14         26         20         15         19   
 16      16         18          8         20         11         10          6   
 17      18         13         24         21         12         20         14   
 18      11         10          7         21         18          8         14   
 19      11         12          8         13         17         16          9   
 21      13          8         23         15         10         13         16   
 22      13         20         15         15         10         14         11   
 23      15         16         21         16         14         15         17   
 24      15          8         16         18         10         11         15   
 25       7         12          6          7                    16         21   
 26      12          5          8          6         11         15          7   
 27      12          9         10         10          9         15          8   
 29       8         12         13          9                                7   
 30       6          7         10          7          6          6          8   
 31       9         14         25         23         29         20         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 976 (1998 Sep 20 - Sep 26)
 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    .696e-01    .105        64.1        4.61        2.60    
AREQ*   .8    385.       -.499e-01    68.0        4.00        1.72    
ASC1   4.6    .167e+04    .108        78.5        5.48        1.70    
AUCK   3.0    81.6        .767e-01    43.7        4.36        2.59    
BAHR   6.0    .766        774.        43.2        5.52        2.62    
BARB   1.7    99.9        .173e-01    32.5        6.00        2.94    
BOGT   1.8    506.        .130        69.1        5.46        1.45    
BRUS   2.0    .252       -.178        62.5        4.00        2.83    
CAS1   6.8    12.8        .227e+04    37.7        5.70        1.29    
CHAT   1.0    104.        .924e-01    84.0        5.00        2.79    
DAV1*  5.6    137.        .949e-01      .         5.16        1.34    
DGAR   4.6    800.        .159        70.7        5.18        1.85    
EISL   7.0    135.        .736e-01    68.2        4.48        2.66    
FAIR*  5.9    .943e+05   -29.1        48.7        4.84        1.71    
FORT*  2.8    .453        .223        82.1        5.00        1.56    
GALA   3.2    548.       -.258e-01    67.4        4.00        1.38    
GOL2*  7.0    13.2        1.03        61.1        4.74        2.12    
GOUG   2.0    .288e+06    502.        62.8        4.54        2.88    
GUAM*  6.0    136.        .318e-01    81.8        6.61        1.91    
HARK*  3.0    5.69        3.01          .         4.00        2.99    
HRAO   1.0    .771e-01    .884e-02    68.0        4.00        2.76    
IISC   2.8    113.        .455e-01    75.3        6.00        1.75    
IRKT*  3.8    .119        .186e-01    62.1        4.76        2.43    
KELY   1.9    .147e+04   -.236          .         6.02        1.38    
KERG*  7.0    .220e+04    .184e+04      .         5.15        2.37    
KIT3*  6.7    129.        .873e-01    73.9        4.61        1.77    
KOKB*  6.7    .283       -.614e-01    84.9        5.31        2.57    
KOUR*  3.8    93.8        .394        73.0        5.75        1.81    
KWJ1*  6.8    .137e+04    .179e-01    82.6        6.45        1.90    
LHAS*  2.9    117.        .601e-01    82.3        5.71        2.21    
MAC1*  5.9    94.7        .783e-01    37.8        4.67        1.93    
MAD2*  4.0    .305        1.45        74.2        5.76        2.40    
MAG0    .9    .289e+06    487.        34.0        5.00        2.32    
MALI*  6.9    .141e+05   -22.1        94.9        6.58        1.87    
MAS1*  3.0    374.        2.30        60.8        4.00        2.35    
MATE*  1.0    .757e-01   -1.70        46.0        5.00        2.87    
MCM4   1.0    111.        .773e-01    46.0        5.00        1.15    
MDVO   1.8    .149        226.        67.0        6.00        1.97    
MKEA   5.0    .693e-01   -.212        61.3        5.00        2.79    
NANO   2.0    11.0        86.7        46.5        4.50        2.50    
NOTO   1.0    .147        996.        87.0        6.00        2.71    
NTUS   5.5    105.        .401e-01    94.4        5.85        1.46    
NYA1   2.5    .146       -34.2        44.6        6.00        1.49    
OHIG*  6.9    129.        .851e-01    53.8        5.16        2.10    
ONSA*  5.2    .910e-01   -.439        41.1        4.00        2.13    
PETR   1.9    .287e+06    480.        42.0        4.55        3.10    
PIE1*  1.0    .464e-01   -.255e-01    51.0        5.00        2.71    
SANT*  6.1    .340e+04    4.16        46.8        4.32        1.55    
SUTH   6.0    108.        .850e-01    56.7        4.74        2.62    
THU1*  2.0    74.9        .758e-01    46.0        6.53        1.61    
TID2*  7.0    101.        1.67        46.9        5.15        2.42    
TSKB*  7.0    1.71       -2.90        55.0        6.35        2.99    
USNO   7.3    .           .           63.6        5.60        2.73    
USUD   6.0    .289        1.21        49.7        6.31        2.63    
WTZR*  7.0    .112       -1.24        64.5        4.88        2.83    
WUHN   2.0    7.40       -265.        55.0        5.00        2.38    
XIAN    .9    108.        .957e-01    52.0        5.00        2.40    
YAKA   2.0    104.        .701e-01    57.5        4.54        2.47    
YAKZ    .9    .289e+06    449.        42.0        5.00        2.68    
YAR1*  7.0    83.8        .800e-01    45.1        4.47        2.34    
YELL*  7.0    .212       -.620e-01    49.8        5.13        1.41    
PRN01  7.0    81.0        59.9        58.3        5.00        1.96    
PRN02  7.0    81.3       -535.        64.5        5.00        2.05    
PRN03  7.0    80.5        50.7        64.0        5.17        2.12    
PRN04  6.9    80.6        28.2        63.3        5.16        2.06    
PRN05  7.0    79.6        165.        57.6        5.00        2.41    
PRN06  7.0    80.3       -.646        63.6        5.30        2.09    
PRN07  7.0    79.8        792.        59.5        5.00        2.15    
PRN08  6.8    81.3        136.        62.3        5.45        2.04    
PRN09  6.8    80.3       -11.5        64.4        5.00        2.18    
PRN10  7.0    79.2        26.8        62.6        5.00        1.94    
PRN13  7.0    83.2       -279.        58.5        5.00        2.19    
PRN14  5.0    79.9        4.38        61.1        5.21        2.24    
PRN15  6.9    3.30        602.        65.4        5.16        1.75    
PRN16  6.9    78.2        80.7        67.9        5.00        2.09    
PRN17  6.9    82.5       -189.        62.5        5.16        2.05    
PRN18  7.0    78.0        16.9        62.1        5.15        2.03    
PRN19  6.8    81.9       -46.3        63.6        5.16        1.94    
PRN21  7.0    81.3        59.1        62.5        5.15        1.87    
PRN22  7.0    79.9        1.36        61.5        5.15        2.04    
PRN23  7.0    80.3        4.58        63.5        5.00        2.23    
PRN24  6.9    80.5        720.        63.0        5.31        2.16    
PRN25  5.7    81.4       -5.99        61.4        5.69        1.86    
PRN26  7.0    82.7        435.        57.9        5.15        2.33    
PRN27  6.8    82.4        42.1        62.7        5.00        1.95    
PRN29  5.0    79.7        423.        59.4        5.00        2.20    
PRN30  7.0    77.9       -10.2        57.4        5.00        2.21    
PRN31  7.0    81.7        7.19        62.0        5.00        2.19    
_______________________
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  9 20   98  9 21   98  9 22   98  9 23   98  9 24   98  9 25   98  9 26
prn   3d rss (cm)
  1     369        284        259        258        244        477        319   
  2     225        216        249        319        199        372        336   
  3     193        310        202        139        188        230        189   
  4     579        714        388        402        227        307        303   
  5     315        270        348        313        304        370        365   
  6     552        825        436        529        516        439        565   
  7     210        286        373        368        286        273        338   
  8     905        300        608        537        511        271        280   
  9     626        260        240        467        299        304        333   
 10     272        336        327        242        255        336        379   
 13     475        274        318        421        472        297        220   
 14     353        256                             1822        980        494   
 15     242        386        584        193        222        536        450   
 16     336        412        861        612        279        264        441   
 17     127        176        156        150        231        190        285   
 18     676        798        631        430        439        393        632   
 19     208        211        306        255        431        411        308   
 21     502        298        186        152        210        216        175   
 22     396        831        620        384        516        728        300   
 23     412        295        233        273        287        189        184   
 24     402        485        387        588       1258        774        358   
 25     730        347        680        505                   462        441   
 26     382        289        310        689        394        416        424   
 27     352        390        457        457        465        412        539   
 29     201        260        176        150                              558   
 30     167        231        233        321        173        172        231   
 31     273        525        401        155        521        369        139   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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