Subject: [IGSREPORT-3521] Wk 0894 JPL Analysis Report
From: D C Jefferson
Date: Mon, 10 Mar 1997 14:42:54 PST

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IGS Electronic Report    Mon Mar 10 14:42:54 PST 1997      Message Number 3521
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Author: D C Jefferson
Subject: Wk 0894 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0894 (DAYS 54-60, DATES 1997 Feb 23 - Mar 01)
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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/0894.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl08947.sum         This text file.
jpl08947.erp         Earth rotation parameters for GPS week 894.
jpl08947.snx         Ground station coordinates for GPS week 894, SINEX format.
jpl0894[0-6].sp3     GPS ephemerides for GPS week 894, sp3 format.
jpl0894[0-6].tro     Ground station troposphere estimates for GPS week 894.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 12.0 cm

According to the file nanu1997.mes obtained from the IGS CBIS, PRN18 was
unusable on day 058.  Orbit repeatability for this satellite appears atypically
high on the previous day (057) and we have elected to remove its solution from
the corresponding orbit products for both days (jpl0894[34].sp3).

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: ONSA (not ALGO) used as reference clock day 055.
WARNING: FAIR (not ALGO) used as reference clock day 056.
WARNING: PIE1 (not ALGO) used as reference clock day 057.
WARNING: Data from JPLM, NLIB, ZWEN excluded day 054.
WARNING: Data from CME1, NLIB, SANT, ZWEN excluded day 055.
WARNING: Data from DAV1, ZWEN excluded day 056.
WARNING: Data from HOB2, KELY excluded day 057.
WARNING: Data from KOUR, USNA excluded day 058.
WARNING: Data from KELY, USNA excluded day 059.
WARNING: Data from USNA excluded day 060.

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 894 (1997 Feb 23 - Mar 01)
     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
50502.50 -16111  20247  -202602  1966    3    3     8      8 37 11 25 -146  251 
50503.50 -16220  20525  -204581  1992    3    4     9      9 37 10 25 -132  309 
50504.50 -16389  20866  -206562  1970    3    3     9      9 37 12 25 -161  293 
50505.50 -16632  21208  -208566  2038    3    3     9      9 37 12 25 -237  330 
50506.50 -16895  21555  -210605  2040    3    3     9      9 37 12 25 -226  301 
50507.50 -17122  21869  -212680  2111    3    3     8      8 37 12 25 -182  276 
50508.50 -17300  22157  -214817  2163    3    3     8      8 37 12 25 -202  290 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 894:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 894 (1997 Feb 23 - Mar 01)
      97  2 23   97  2 24   97  2 25   97  2 26   97  2 27   97  2 28   97  3  1
prn   3d rss (cm)
  1       9          8          8          8         10          9          8   
  2       8         10          9         20         12         13         18   
  3      22         20         20         30         22         17         13   
  4      10         11         10         10         13         14         10   
  5       9          7          7         10          7          6          7   
  6      10         10         11         10         18         11         12   
  7       8         10         12         14         13         18         13   
  9      10         14         18          8         14         10         10   
 10      10         13         10         15         14         12         18   
 14      29         21          7         10          9         37         45   
 15      10         15         10         14         22          8          9   
 16      13         15         26         14         10          8         37   
 17       8         19         11         23         15         19         20   
 18      10         24         30        126         48         21         19   
 19      27         12         12         16         20         22         19   
 21      10         15         13         15         19         21          6   
 22      33         12         17         15         12         14         10   
 23      26         23         11         21         15         16         14   
 24      12         17         14         15         12          9         20   
 25      11         12         10         15         11          9          9   
 26      15         12         23         19         14         12         12   
 27      14         16         12         14          8         12         17   
 29      10          8          8         14         19         11         16   
 30       9          9          6         10         12          7          7   
 31      20         13         12         10         22         12         22   
_______________________
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 894 (1997 Feb 23 - Mar 01)
 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    96.2        .892        47.5        4.93        2.92    
ANKR    .9    95.6       -.212e-01    55.0        5.00        2.69    
AREQ   1.9    90.8        1.05        30.2        5.00        2.46    
ASC1   5.7    495.        .294        78.8        5.88        1.61    
BAHR   6.1    .539        264.        43.0        4.86        3.37    
BOGT   6.0    115.       -.329        56.9        6.18        2.10    
BRAZ   1.5    93.3       -.122        61.5        5.52        1.94    
BRUS   6.0    .403        1.20        57.4        4.69        2.91    
CAS1   3.7    10.8        197.        36.1        5.26        1.62    
CHAT   7.0    103.        .104        80.3        6.02        2.75    
COCO   6.7    .104e+06   -529.        46.0        5.16        2.71    
CRO1   1.0    120.        2.74        45.0        6.00        2.12    
DAV1   2.9    53.9        946.        31.0        5.35        1.43    
DGAR   7.0    106.        .106        67.6        8.31        2.00    
FAIR*  7.0    .436        1.51        34.1        4.60        2.17    
FLIN   2.0    85.0        1.15        39.9        3.54        2.43    
FORT   3.9    .670e+05   -136.        46.3        7.34        3.11    
GODE   2.0    .406        .680        41.5        4.00        2.56    
GOL2*  6.8    80.0        .326e-01    54.7        4.58        2.85    
GUAM   7.0    135.        .103        52.0        6.18        2.43    
HART*  5.0    26.4       -5.03        46.0        5.62        2.81    
HOB2   1.0    .362        2.01        56.0        6.00        2.67    
IISC   7.0    114.        .101        71.3        5.46        2.48    
IRKT   2.6    .145        .462        49.0        4.38        2.56    
KELY   4.0    313.        .257        32.5        5.76        1.55    
KERG   4.0    142.        6.26          .         5.52        2.70    
KIRU   1.0    3.53        2.23        43.0        7.00        2.18    
KIT3   2.8    132.        .812        64.7        5.34        3.12    
KOKB*  6.8    167.        .337e-02    70.3        6.17        1.95    
KOSG*  7.0    7.67       -5.14        38.7        4.19        2.47    
KOUR   3.0    5.15        7.92          .         9.37        1.57    
KWJ1   7.0    100.        .103        62.5        6.47        1.90    
LHAS   4.5    .295e+05    3.45        63.0        5.20        2.13    
LPGS    .5    .418e+04    2.49          .         5.00        2.61    
MAC1   5.7    82.5       -.335        29.4        4.75        2.23    
MADR*  6.8    10.5        .805          .         4.73        2.42    
MALI   2.9    22.1       -82.9          .         8.00        2.38    
MAS1   7.0    .343e+05    65.8        40.6        4.04        2.45    
MCM4   7.0    94.0        .109        37.8        4.86        1.63    
MKEA   4.0    .148        .181        47.1        6.04        2.69    
OHIG   5.3    .274e+05    .291        56.6        4.84        1.30    
ONSA    .9    .           .           42.0        4.00        2.02    
PAMA   3.8    492.       -.377          .         10.3        2.29    
PERT   7.0    2.40       -7.15        48.8        5.24        3.21    
PIE1   3.0    .717e-01    .526e-01    36.3        4.36        2.59    
RCM6   5.0    80.3       -.169        64.3        5.84        2.84    
REYK   1.0    84.3       -.111        58.0        7.00        2.05    
SANT*  5.2    .171e+04   -.420        41.2        5.00        1.47    
STJO   1.0    4.48        .688        48.0        4.00        2.73    
TID2*  7.0    .104        .995e-01    38.3        6.15        2.63    
USUD   7.0    6.39        1.63        34.1        4.46        2.96    
WES2   1.0    .737       -3.50        98.0        4.00        2.61    
WTZR*  6.7    59.4        .374        61.3        4.16        2.51    
XIAN   2.0    121.        1.15        48.1        4.00        3.05    
YAR1*  7.0    13.0        .252          .         5.24        2.75    
YELL*  7.0    50.5        .331        52.2        4.74        1.44    
PRN01  6.6    80.1        14.1        53.2        5.73        2.11    
PRN02  7.0    79.8       -339.        54.5        5.60        2.26    
PRN03  6.6    79.7        104.        54.7        5.74        2.25    
PRN04  7.0    81.5        15.1        51.9        5.73        2.18    
PRN05  7.0    80.6        84.8        49.3        5.30        2.79    
PRN06  6.8    80.0        4.41        49.0        5.31        2.31    
PRN07  6.7    79.2        739.        52.9        5.45        2.27    
PRN09  7.0    79.5       -29.1        53.8        5.74        2.23    
PRN10  7.0    83.1        4.66        51.7        5.60        2.13    
PRN14  7.0    82.6        17.5        52.2        5.61        2.31    
PRN15  7.0    2.68        397.        55.5        5.45        2.29    
PRN16  7.0    82.5        2.04        50.8        5.00        2.36    
PRN17  7.0    81.2       -141.        53.3        5.15        2.21    
PRN18  6.6    114.        23.3        53.7        5.71        2.15    
PRN19  7.0    80.4        251.        52.3        5.31        2.15    
PRN21  7.0    83.0        35.1        54.7        5.46        2.17    
PRN22  7.0    80.7        373.        49.9        5.45        2.28    
PRN23  7.0    81.8        10.1        50.3        6.15        2.21    
PRN24  7.0    82.0        220.        54.6        5.74        2.28    
PRN25  7.0    82.9       -4.87        51.3        5.46        2.12    
PRN26  6.8    78.6       -126.        54.4        6.02        2.21    
PRN27  6.9    80.0        20.0        52.1        5.30        2.29    
PRN29  6.6    80.2        7.18        49.2        5.30        2.24    
PRN30  7.0    80.1       -38.1        50.8        5.00        2.63    
PRN31  6.6    82.7        234.        51.0        5.60        2.16    
_______________________
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  2 23   97  2 24   97  2 25   97  2 26   97  2 27   97  2 28   97  3  1
prn   3d rss (cm)
  1     649        771       1029       1242       1410       1395        893   
  2     514        479        326        280        388        795        450   
  3     351        494        370        496        328        233        338   
  4     162        370        456        360        375        636        546   
  5     318        248        337        247        246        216        247   
  6     839        825        767        649        672        583        740   
  7     963        828        820        842        843        845        835   
  9     243        250        228        324        332        278        323   
 10     804        651        785        911        788        276        340   
 14     438       1083        399        393        606        307        443   
 15    1197        620        367        257        426        325        440   
 16    1020        683        347        633        382        308        388   
 17     713        730        699        696        451        485        658   
 18     354        523        540        566       1667       2094       1090   
 19     303        297        800        282        193        389        700   
 21     373        324        369        467        563        232        331   
 22     540        415        490        421        856        266        296   
 23     493        626        979        444        935        756        839   
 24     540        547        381        486        523        334        306   
 25     436        628        298        450        348        278        234   
 26     219        216       1010        469        283        428        484   
 27     372        440        321        394        529        369        450   
 29     321        370        896        271        351        461        509   
 30     268        304        557        277        237        313        180   
 31     418        514        466        497        541        424        476   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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