Subject: [IGSREPORT-4409] Wk 0934 JPL Analysis Report
From: D C Jefferson
Date: Mon, 15 Dec 1997 16:36:35 PST

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IGS Electronic Report    Mon Dec 15 16:36:35 PST 1997      Message Number 4409
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Author: D C Jefferson
Subject: Wk 0934 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0934 (DAYS 334-340, DATES 1997 Nov 30 - Dec 06)
******************************************************************************

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 (128.149.70.41),
directory pub/jpligsac/0934.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09347.sum         This text file.
jpl09347.erp         Earth rotation parameters for GPS week 934.
jpl09347.snx         Ground station coordinates for GPS week 934, SINEX format.
jpl0934[0-6].sp3     GPS ephemerides for GPS week 934, sp3 format.
jpl0934[0-6].tro     Ground station troposphere estimates for GPS week 934.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 9.0 cm

Data from the newly-launched PRN08 did not meet our initial orbit convergence
criteria on days 334 and 335, and have been excluded from these days' analyses
accordingly.  Data from this satellite were used for the remaining days this
week (336-340); however, we continue to heavily deweight these data in our
processing.  Data from PRN13 were similarly mismodeled on days 334-337, and
have been excluded from the the analyses of these days.

According to the file gpsn4.txt obtained from tycho.usno.navy.mil, PRN18
was scheduled unusable days 339-340 for repositioning.  PRN26 was likewise
unusuable on day 337.  Data from these satellites did not meet our intial
orbit convergence criteria on the corresponding days (day 336 for PRN26 as
well), and have been excluded from our analyses accordingly.
 
We have updated our Analysis Center profile.  The new file may be obtained
from the IGSCB, at ftp://igscb.jpl.nasa.gov/igscb/center/analysis/jpl.acn.

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: MKEA (not ALGO) used as reference clock day 334.
WARNING: NLIB (not ALGO) used as reference clock days 337 and 338.
WARNING: Data from PRN08 excluded days 334 and 335; deweighted days 336-340.
WARNING: Data from PRN13 excluded days 334-337.
WARNING: Data from PRN18 excluded days 339 and 340 due to a manuever.
WARNING: Data from PRN26 excluded days 336 and 337 due to a manuever.
WARNING: Data from METS, SANT excluded day 334.
WARNING: Data from KOKB, NICO, RCM6 excluded day 335.
WARNING: Data from IISC excluded day 336.
WARNING: Data from IISC, KOKB excluded day 337.
WARNING: Data from GUAM, KELY, KOKB, SNI1 excluded day 338.
WARNING: Data from METS, SFER excluded day 339.
WARNING: Data from SPK1, TAHI excluded day 340.

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 934 (1997 Nov 30 - Dec 06)
     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
50782.50  17696  22442   265032  1648    3    4     8      8 37 10 25 -253 -224 
50783.50  17453  22251   263390  1636    4    4     8      8 37  9 25 -203 -273 
50784.50  17269  22035   261753  1637    3    3     8      8 37 10 25 -201 -254 
50785.50  17118  21821   260125  1619    4    4     9      9 37  9 25 -144 -220 
50786.50  16969  21663   258478  1675    3    4     8      8 37  9 27 -179 -189 
50787.50  16780  21487   256821  1640    4    4     9      9 37 10 26 -206 -180 
50788.50  16522  21300   255145  1711    3    3     8      8 37 11 26 -205 -213 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 934:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 934 (1997 Nov 30 - Dec 06)
      97 11 30   97 12  1   97 12  2   97 12  3   97 12  4   97 12  5   97 12  6
prn   3d rss (cm)
  1      12         11          6          9          9         20         11   
  2       3          7          4          8          8         12          8   
  3       8          6          7         10         11         17          9   
  4       9          9          6         11          9         11         12   
  5      10          8          8          7         13         10         10   
  6      10          6         15         17          9          8          9   
  7       7          7          8          7         11         11          9   
  8                            48         43         48         47         39   
  9       9          7          9          8          9         11          6   
 10       6          5          7          6          8         12         10   
 13                                                  15         18         22   
 14     355         16         11         22         26         24         15   
 15      12         13          7          9          9          8         12   
 16      14          9         11         14          8         15         13   
 17       9          7         12          6         10         11          9   
 18      10          9          9         16          8                         
 19      10          6          9          9          9          8          9   
 21      10          6          8         10          5          8          8   
 22      16         12         14          8         14         12         16   
 23      12         13          7         12          9          8         11   
 24      10          9          8          9          6          8         10   
 25      13         12         10          9         20         15         16   
 26      10         10                               16         10          8   
 27       6          7          6          6          6          6          8   
 29       5         15          8         11         14         12         18   
 30       5          5         21          9         19          6          4   
 31      10          7          8          8          7         10          7   
_______________________
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 934 (1997 Nov 30 - Dec 06)
 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    .527        1.12        45.9        4.00        3.07    
ANKR   1.0    150.       -.913        58.0        4.00        2.83    
AREQ   4.9    104.       -.348        58.2        4.00        2.22    
ASC1   5.9    .262e+04   -.683        69.7        4.73        1.52    
BAHR   6.0    .523        234.        44.5        5.04        3.12    
BRUS   1.0    .145        8.68        65.0        4.00        2.62    
CAS1   4.7    .208e+04    951.        52.4        5.21        1.25    
CASA   1.0    26.1        326.        37.0        3.00        2.60    
CHAT   7.0    117.       -.639        75.0        5.16        2.85    
CICE   1.0    91.9       -1.46        36.0        6.00        2.37    
COCO   3.9    91.3       -.885e+04    47.6        5.28        3.01    
CRO1   7.0    288.       -.647        45.8        5.15        2.02    
DGAR   6.4    .394e+04   -.719        73.0        6.02        1.48    
EISL   6.8    .123e+04   -.619        57.8        5.46        2.43    
FAIR*  7.0    .371       -1.12        36.3        4.16        2.18    
FLIN   2.0    83.8       -1.12        44.5        3.00        2.82    
FORT   7.0    .417       -3.34        74.1        6.00        1.41    
GOL2*  7.0    15.2       -.605        53.0        4.00        1.93    
GUAM   5.8    392.       -.754        58.2        6.70        2.26    
HARK   7.0    27.5        3.04        60.7        5.59        2.85    
IISC   3.0    103.       -.822        67.7        5.68        2.31    
IRKT   4.9    .438       -.661        45.6        4.22        2.55    
KERG   7.0    102.        916.          .         5.00        2.61    
KOKB*  3.3    334.       -1.29        62.0        5.05        1.38    
KOSG*  7.0    6.89       -17.5        41.0        3.32        2.42    
KOUR    .8    .496e+04   -2.59          .         6.00        1.72    
KWJ1   6.9    391.       -.634        66.5        6.16        1.87    
MAC1   4.4    211.       -.684        47.5        4.00        2.43    
MAD2*  6.8    809.        .505        57.5        5.43        2.12    
MALI   5.5    .971e+04   -47.1        84.6        6.51        1.90    
MCM4   7.0    109.       -.641        50.7        5.00        1.10    
MDVO   1.9    .874e+05    169.        64.9        6.00        2.07    
MKEA   6.9    51.2       -.896        64.0        4.73        2.29    
MOIN   1.9    95.5       -1.40        65.0        6.53        1.81    
NLIB   1.8    .           .           52.0        4.00        2.51    
NOTO   1.0    .200       -5.94        30.0        4.00        2.81    
OHIG   6.5    .269e+05    1.03        58.8        4.61        1.53    
ONSA   1.0    .423e-01   -.290        42.0        4.00        2.11    
PERT   4.0    2.18       -7.59        53.3        4.26        2.79    
POL2   3.8    89.3       -.210        46.7        3.54        2.60    
RCM6   1.0    111.       -1.36        57.0        5.00        2.27    
REYK   6.0    75.0       -.726        57.2        5.68        2.20    
SANT*   .9    .297e+04   -3.74        45.0        4.00        1.64    
SELE   2.9    109.       -1.21        34.0        3.00        2.80    
SHAO   1.0    93.3       -.895        45.0        4.00        2.69    
STJO   4.0    388.        1.91        41.6        4.26        2.33    
TAHI   4.7    220.       -.588        99.5        5.63        2.11    
THU1   7.0    87.2       -.639        48.4        5.60        2.18    
TID2*  7.0    .365       -.664        43.5        5.60        2.71    
USUD   6.0    1.23       -11.6        41.0        4.00        2.75    
WTZR*  7.0    .476       -.609        63.0        4.16        2.57    
WUHN   3.8    4.85       -164.        49.3        4.54        2.26    
XIAN   2.0    109.       -1.41        49.5        4.00        2.64    
YAR1*  6.8    98.7       -.625        41.9        4.16        2.15    
YELL*  7.0    677.        4.22        41.6        4.00        1.97    
PRN01  7.0    82.1        33.3        54.5        5.00        2.13    
PRN02  6.8    81.0       -430.        60.9        5.00        2.29    
PRN03  7.0    82.7        76.1        52.1        5.00        2.38    
PRN04  7.0    81.7        59.2        54.2        5.00        2.01    
PRN05  6.8    80.0        124.        53.0        5.04        2.31    
PRN06  7.0    80.8       -.733        57.6        5.14        2.13    
PRN07  7.0    78.0        761.        56.6        5.00        2.19    
PRN09  7.0    82.2       -21.2        53.8        5.00        2.43    
PRN10  7.0    80.1        15.1        62.1        5.00        2.25    
PRN14  7.0    80.5        23.9        56.9        4.87        2.00    
PRN15  7.0    3.47        496.        58.9        4.87        2.31    
PRN16  7.0    80.0        38.2        59.4        4.87        2.32    
PRN17  7.0    81.9       -167.        57.2        5.00        2.13    
PRN18  5.0    83.1        7.55        56.8        5.00        1.88    
PRN19  7.0    79.9        323.        52.0        5.00        2.14    
PRN21  7.0    77.9        8.08        57.7        5.00        2.23    
PRN22  6.6    82.8        32.3        56.8        5.15        2.07    
PRN23  7.0    81.1        5.99        56.6        5.00        2.36    
PRN24  7.0    81.8        782.        53.0        5.00        2.39    
PRN25  7.0    81.1       -7.24        53.6        5.00        2.00    
PRN26  5.0    82.0       -49.2        52.8        5.00        2.23    
PRN27  7.0    80.2        9.02        54.8        5.00        2.35    
PRN29  7.0    83.5        118.        53.5        5.00        2.26    
PRN30  6.6    78.6       -13.9        53.3        5.15        2.25    
PRN31  7.0    82.7       -.306        55.9        5.00        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 11 30   97 12  1   97 12  2   97 12  3   97 12  4   97 12  5   97 12  6
prn   3d rss (cm)
  1     801        621        721        514        507        474        500   
  2     311        629        480        361        382        420        182   
  3     297        253        326        380        335        271        290   
  4     521        567        496        591        634        526        372   
  5     435        480        397        481        579        588        409   
  6     596        601        628        654        706        645        665   
  7     538        388        338        314        399        363        582   
  8                          1488       4921      11719      20752      32268   
  9     227        256        257        213        280        280        209   
 10     283        485        586        517        333        375        425   
 13                                                 212        535        610   
 14     924        518        378        404       1875        495        468   
 15     642        327        610        226        327        242        261   
 16     586        655        443        388        814        767       1267   
 17     608        640        714        779        636        350        479   
 18     143        184        304        226        176                         
 19     442        432        442        432        612        423        354   
 21     204        233        368        613        254        314        151   
 22     456        638        892        754        570        706        519   
 23     554        690       1502       1438       1173       1750        828   
 24     629        559        607        554        311        498        504   
 25     395        318        544       1029        644        578        254   
 26     389        291                             1561        401        354   
 27     257        484        374        303        449        395        252   
 29     111        745        178        234        320        550        594   
 30     688        431        284        320        416        376        296   
 31     356        392        269        321        247        248        229   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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