Subject: [IGSREPORT-4006] Wk 0915 JPL Analysis Report
From: D C Jefferson
Date: Tue, 5 Aug 1997 15:11:14 PDT

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IGS Electronic Report    Tue Aug  5 15:11:14 PDT 1997      Message Number 4006
******************************************************************************

Author: D C Jefferson
Subject: Wk 0915 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0915 (DAYS 201-207, DATES 1997 Jul 20 - Jul 26)
******************************************************************************

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/0915.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09157.sum         This text file.
jpl09157.erp         Earth rotation parameters for GPS week 915.
jpl09157.snx         Ground station coordinates for GPS week 915, SINEX format.
jpl0915[0-6].sp3     GPS ephemerides for GPS week 915, sp3 format.
jpl0915[0-6].tro     Ground station troposphere estimates for GPS week 915.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 11.0 cm

Data from PRN18 were mismodeled on day 207 and have been excluded from this
day's analysis.  Also, according to files obtained at USNO, a new satellite
PRN13/GPS43 was launched on day 204.  No data were available or used in
this week's processing.

Beginning this week we add two new candidate stations, SELE and SOFI.  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)
SELE (Almaty, Kazakstan)  1046790.8361   4540257.1789   4342920.8758
SOFI (Sofia, Bulgaria)    4319372.3900   1868687.5700   4292063.8000

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 ALGO) used as reference clock day 204.
WARNING: FAIR (not ALGO) used as reference clock days 205 and 206.
WARNING: MKEA (not ALGO) used as reference clock day 207.
WARNING: Data from FLIN, MKEA, SNI1, TAEJ, TAHI, ZWEN excluded day 201.
WARNING: Data from FLIN, GODE, KELY, LBCH, SNI1, TAEJ, TMGO excluded day 202.
WARNING: Data from FLIN, KELY, ZWEN excluded day 203.
WARNING: Data from ZWEN excluded day 204.
WARNING: Data from ANKR, ZWEN excluded day 205.
WARNING: Data from THU1 excluded day 206.
WARNING: Data from METS, POL2, QUIN excluded day 207.

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 915 (1997 Jul 20 - Jul 26)
     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
50649.50   8989  52626   509283  1491    3    3     6      6 37 10 25  436  -87 
50650.50   9410  52517   507765  1544    3    3     6      6 37  9 25  354  -82 
50651.50   9767  52406   506219  1549    2    3     6      6 37 10 25  327  -62 
50652.50  10097  52282   504651  1587    3    3     6      6 37  8 25  292  -85 
50653.50  10388  52195   503043  1628    2    3     6      6 37  9 25  296  -71 
50654.50  10688  52151   501420  1619    3    3     6      6 37  9 25  260  -63 
50655.50  10944  52044   499805  1611    3    4     7      7 37 10 24  250  -93 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 915:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 915 (1997 Jul 20 - Jul 26)
      97  7 20   97  7 21   97  7 22   97  7 23   97  7 24   97  7 25   97  7 26
prn   3d rss (cm)
  1      10         17         24          7         10          9         10   
  2      11          6          8          5         16         10          7   
  3      15         11         11         12         10         21         18   
  4      13          9          8         11          8          9         16   
  5      15         14         12          6          7          5         13   
  6      16         18         17         23         36         32         14   
  7      19          8          7         10          8          5          8   
  9      10         10          9          7          7         10         10   
 10      11          4          5          6          5         11         11   
 14      15         13         14         19          7          9         14   
 15      12          9         16          9         13         11         12   
 16      20         10         14         13         45         42         27   
 17      10          9         17         13          6         16         12   
 18      10         14         17         14         20         18              
 19      17         10          8         12         28         26         17   
 21      15          9         12         10         10         10         10   
 22      23          9         19         15         18         21         18   
 23       8          8         23         10          8         14          8   
 24       7         17         16          6         12         10         11   
 25      17         10         17         11         13          6         13   
 26       8          8         11          7          8          9          9   
 27      11         10          6          8          7          5          8   
 29       8         10          7          7         11          8         11   
 30      13         14         10         13         18          7          8   
 31      18          8         12         72         11         12          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 915 (1997 Jul 20 - Jul 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)
 |     |      |           |           |           |           |
 |___  |__    |_______    |_______    |___        |___        |__
ALBH   1.0    7.28       -13.0        53.0        5.00        3.01    
ALGO*  7.1    241.        1.30        50.0        4.45        2.92    
ANKR   1.0    149.        .120        53.0        5.00        2.94    
AREQ   3.0    96.3       -1.04        38.3        4.69        2.38    
ASC1   4.8    85.3       -.623        75.1        5.21        1.37    
AUCK   1.0    87.1        .371        40.0        5.00        2.85    
BAHR   7.0    .684        128.        57.9        5.03        3.91    
BRAZ   2.0    .120e+04    .103        51.0        6.00        3.50    
BRMU   1.0    115.        .369        39.0        7.00        2.87    
BRUS   1.0    .226        1.41        66.0        7.00        2.73    
CAS1   4.8    23.4        .426e+04    40.4        5.62        1.93    
CASA   3.0    .371e+05    67.5        38.4        5.00        2.84    
CHAT   6.0    110.       -.901        76.3        5.55        2.69    
CHUR   2.0    1.62       -.710        47.5        6.00        1.92    
CRO1   5.9    234.       -.913        50.1        7.38        2.08    
DAV1   2.0    43.0        .236e+04    32.0        5.00        1.79    
DGAR   6.0    94.6       -.904        57.6        5.88        1.82    
FAIR*  6.0    49.5       -1.09        36.2        5.35        2.43    
FLIN   3.0    92.7        .640e-01    49.0        6.73        2.77    
FORT   4.9    .135       -1.64        48.6        5.85        3.03    
GODE   2.0    .246       -.960        43.0        5.53        2.68    
GOL2*  6.0    233.       -3.15        56.4        5.35        2.19    
GUAM   6.0    114.       -.904        76.7        7.59        2.40    
HARK   7.0    34.5        1.68        48.6        4.31        2.89    
HKLO   2.0    .287e+06    483.        52.0        7.52        2.88    
IISC   6.0    81.7       -.904        68.8        5.35        2.34    
IRKT   3.9    .229       -1.26        66.5        5.00        2.34    
KERG   6.0    106.       -.192e-01      .         5.36        2.55    
KIRU   6.0    5.53        .571        55.8        6.84        2.31    
KIT3   1.9    125.        .220e-01    54.0        4.52        2.73    
KOKB*  6.7    127.       -.575        77.1        6.74        1.85    
KOSG*  7.0    503.       -2.91        46.2        5.31        2.68    
KOUR   2.0    3.44        13.8          .         7.52        1.62    
KWJ1   7.0    99.8       -.717        59.6        8.11        1.76    
MAC1   5.6    84.4       -.481        30.4        4.09        2.42    
MAD2   1.9    .183e+04    2.84        109.        7.50        1.97    
MADR*  6.8    .729       -.897e-01      .         7.02        2.25    
MALI   4.6    39.7       -284.          .         8.18        2.33    
MAS1   5.0    3.19       -.796e-01    42.0        5.05        2.44    
MCM4   7.0    95.9       -.715        31.3        4.46        2.10    
MKEA   6.0    .108       -.790        40.9        6.03        2.84    
MOIN   1.8    95.6       -1.74        62.5        7.06        1.91    
PERT   7.0    2.37       -6.82        57.0        5.50        2.97    
PIE1   1.0    .           .           51.0        6.00        2.86    
POL2   1.0    89.4       -1.71          .         4.00        .821    
REYK   6.0    82.3       -.540        57.9        6.90        2.22    
SANT*  5.3    .130e+04   -.530        35.2        6.92        1.46    
SELE   3.9    112.       -.851        35.5        5.28        2.99    
SHAO   1.0    109.        .366        53.0        6.00        2.55    
SOFI   1.0    108.        .362        35.0        5.00        2.99    
STJO   6.0    4.09        1.43        38.5        4.88        2.98    
TAHI   1.9    .271e+04    .444        76.6        5.50        2.47    
THU1   6.0    77.4       -.828        47.9        5.52        2.63    
TID2*  6.9    .121       -.690        36.7        5.16        2.63    
TOUL   4.0    .636       -.324        52.4        5.53        2.75    
USUD   7.0    99.0        .471        42.4        6.01        2.65    
WES2   1.0    .297        .550        55.0        5.00        2.86    
WTZR*  4.9    .505       -.271        63.4        5.00        2.52    
XIAN   4.0    98.9       -.481        40.0        6.35        2.98    
YELL*  7.0    89.6       -1.49        48.4        5.91        2.04    
PRN01  7.0    81.9        23.8        54.8        6.05        2.17    
PRN02  7.0    82.9       -386.        54.3        5.86        2.58    
PRN03  6.8    81.2        34.8        53.9        5.87        2.40    
PRN04  7.0    81.4        37.5        53.4        5.87        2.38    
PRN05  7.0    81.5        104.        51.6        5.30        2.56    
PRN06  6.6    82.2       -.914        52.5        6.03        2.22    
PRN07  6.6    80.7        750.        56.8        6.00        2.28    
PRN09  7.0    80.6       -5.95        52.6        6.00        2.37    
PRN10  6.7    80.6        10.0        55.2        5.87        2.26    
PRN14  6.8    80.8        19.9        50.6        6.20        2.14    
PRN15  7.0    3.25        449.        54.1        5.87        2.06    
PRN16  6.7    81.2        20.0        54.2        6.32        2.28    
PRN17  7.0    82.0       -155.        55.3        5.59        2.28    
PRN18  6.0    81.3        1.81        50.2        5.85        2.58    
PRN19  7.0    82.3        119.        52.1        5.62        2.43    
PRN21  6.8    81.0        68.2        52.5        6.30        2.40    
PRN22  7.0    84.2        4.56        50.4        6.02        2.40    
PRN23  6.7    81.7        1.09        54.0        6.15        2.49    
PRN24  7.0    82.0        666.        53.4        5.75        2.34    
PRN25  7.0    82.9       -6.41        50.9        6.30        2.30    
PRN26  7.0    83.6       -207.        51.4        6.15        2.40    
PRN27  7.0    83.0        36.0        52.3        5.74        2.47    
PRN29  7.0    84.8        231.        51.7        5.74        2.66    
PRN30  6.9    81.8       -70.8        56.9        5.59        2.35    
PRN31  6.4    81.8        296.        53.2        5.75        2.38    
_______________________
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
      97  7 20   97  7 21   97  7 22   97  7 23   97  7 24   97  7 25   97  7 26
prn   3d rss (cm)
  1     387        332        530        585        455        415        383   
  2     431        463        435        297        372        613        445   
  3     646        285        244        378        492        518        410   
  4     495        461        627        404        505        582        355   
  5     243        267        268        274        366        324        329   
  6     493        508        812        752        612        524        475   
  7     478        378        566        695        490        639        517   
  9     170        229        232        228        259        342        226   
 10     761        291        409        707        493        428        590   
 14    1332        788        868       1307        942       1033       2405   
 15     502        347        309        444        302        593        613   
 16    1281        207        335        342       1140       1710       2382   
 17     232        288        346        309        334        303        365   
 18     451        510        562        785        522        553              
 19     187        196        238        292        366        391        491   
 21     445        445        466        577        349        295        453   
 22     666        351        332        361        510        636        409   
 23     235        308        303        626        476        424        762   
 24     814        474        352        374        407        416        509   
 25     660        574        364        507        396        250        251   
 26     293        257        299        388        382        324        349   
 27     500        414        587        656        586        704        746   
 29     594        397        331        326        411        394        574   
 30     233        318        321        416        469        426        307   
 31     532        535        308        332        286        327        533   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

global:   albh algo ankr areq asc1 auck bahr braz brmu brus cas1 casa chat chur cro1 dav1 dgar fair flin fort gode gol2 guam hark hklo iisc irkt kerg kiru kit3 kokb kosg kour kwj1 mac1 mad2 madr mali mas1 mcm4 mkea moin pert pie1 pol2 reyk sant sele shao sofi stjo tahi thu1 tid2 toul usud wes2 wtzr xian yell

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