Subject: [IGSREPORT-4092] Wk 0919 JPL Analysis Report
From: D C Jefferson
Date: Tue, 2 Sep 1997 14:32:28 PDT

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IGS Electronic Report    Tue Sep  2 14:32:28 PDT 1997      Message Number 4092
******************************************************************************

Author: D C Jefferson
Subject: Wk 0919 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0919 (DAYS 229-235, DATES 1997 Aug 17 - Aug 23)
******************************************************************************

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/0919.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09197.sum         This text file.
jpl09197.erp         Earth rotation parameters for GPS week 919.
jpl09197.snx         Ground station coordinates for GPS week 919, SINEX format.
jpl0919[0-6].sp3     GPS ephemerides for GPS week 919, sp3 format.
jpl0919[0-6].tro     Ground station troposphere estimates for GPS week 919.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 15.0 cm

According to reference files obtained from USNO, PRN13/GPS43 was launched on
day 204.  Beginning this week, we include data from this satellite, heavily
deweighted.  Data from this satellite were mismodeled on days 232-235, and
have been excluded accordingly.

As observed in the orbit repeatability table below, PRN23 exhibits atypically
high overlaps on day 232.  Although used in the analysis of this day, we have
elected to remove its solution from the corresponding orbit product, namely
jpl09193.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: FAIR (not ALGO) used as reference clock days 229, 231-234.
WARNING: NLIB (not ALGO) used as reference clock day 230.
WARNING: USUD (not ALGO) used as reference clock day 235.
WARNING: Data from PRN13 deweighted days 229-231, excluded days 232-235.
WARNING: Data from MONP, OBER, QUIN excluded day 229.
WARNING: Data from CHIL excluded day 230.
WARNING: Data from CAGL, CHIL, KWJ1 excluded day 231.
WARNING: Data from CRO1 excluded day 232.
WARNING: Data from CRO1, HKLO, KELY excluded day 233.
WARNING: Data from MKEA excluded day 234.
WARNING: Data from KELY, MCM4, POL2 excluded day 235.

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 919 (1997 Aug 17 - Aug 23)
     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
50677.50  16253  48468   466390  1353    3    3     7      7 37  8 26  222 -157 
50678.50  16414  48277   465062  1304    3    3     7      7 37  9 26  199 -210 
50679.50  16606  48061   463790  1240    4    4     8      8 37  6 26  220 -208 
50680.50  16767  47776   462496  1347    4    4     9      9 37  7 25  152 -187 
50681.50  17027  47578   461099  1447    3    3     8      8 37  8 25  210 -225 
50682.50  17299  47348   459643  1466    4    5     9      9 36  6 25  263 -190 
50683.50  17566  47135   458185  1450    3    4     8      8 37  7 25  232 -194 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 919:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 919 (1997 Aug 17 - Aug 23)
      97  8 17   97  8 18   97  8 19   97  8 20   97  8 21   97  8 22   97  8 23
prn   3d rss (cm)
  1      16         11         15         23         15         12         14   
  2       9         10         22         18         10          9          9   
  3       9         20         28         42         31         37         38   
  4      34         35         18         17         20          9         13   
  5      12          9         11         17         14         16         10   
  6      13         14         19         15         20         30         17   
  7       8         18          9         17         23         12          8   
  9      20          9         12         12         13         20          9   
 10      10         22         13         12         16          8         13   
 13      61         68         75                                               
 14      16         23         24         22         10         12          9   
 15       9         12         22         17          8         12         15   
 16      11         14         11         14         14         11         14   
 17      11          7          9         27         18         21         14   
 18      10         11         14         17         16         15         16   
 19      17         16         20         14         14         27         22   
 21      17         11         26         29         28         11         27   
 22      17         16         19         17         10         24         19   
 23      11         19         25         66         20         31         24   
 24      22         12         23         11         10         12          9   
 25      17         16         11         19         17         34         26   
 26       9         16         10          6         11         12          8   
 27       7         13         19         11          8          8          9   
 29      29         22         10         17         13         17         13   
 30      12          9          8         13         23         24         22   
 31      12         17         16         14         13         21         24   
_______________________
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 919 (1997 Aug 17 - Aug 23)
 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    .9    11.1        20.3        40.0        4.00        3.18    
ALGO*  5.7    .464        .210        49.5        4.93        3.00    
ANKR   3.8    143.       -.204        52.8        5.26        2.86    
AREQ    .9    99.4       -.141        37.0        5.00        2.27    
ASC1   4.8    90.2       -.194        67.6        5.23        1.52    
AUCK   3.8    89.8       -.204        40.3        4.77        2.77    
BAHR   6.8    .651        128.        61.5        5.33        3.57    
BRAZ   1.7    168.       -.199        56.2        5.00        2.96    
BRMU   1.9    124.       -.189        38.0        8.54        3.08    
BRUS   1.0    .263        6.13        62.0        7.00        2.89    
CAS1   2.7    14.3        571.        44.6        5.70        1.74    
CASA   2.9    .651e+05    287.        35.3        6.36        2.97    
CHAT   3.7    115.       -.180        76.8        5.00        2.42    
CHUR   1.9    2.70        .169        46.9        6.49        2.09    
COCO   1.9    95.1       -.451e+04      .         5.50        2.61    
CRO1   3.8    158.       -.178        49.5        7.04        2.16    
DAV1   4.6    .680e+05    243.        31.2        4.81        1.68    
DGAR   5.7    99.0       -.203        61.1        6.70        1.64    
DRAO   1.0    1.64        1.24        31.0        5.00        2.88    
DUBO    .9    527.       -.193        39.0        5.00        2.65    
FAIR*  5.9    .186        .472e-01    41.6        5.94        2.10    
FLIN   3.8    90.6       -.190        49.0        5.59        2.66    
FORT   4.7    .220e+05   -2.04        46.6        6.30        3.09    
GODE   3.8    97.9       -.244        45.7        7.50        2.78    
GOL2*  6.8    180.       -1.21        50.3        6.42        2.31    
GOPE    .9    .289e+06    501.        49.0        8.00        3.08    
GUAM   5.7    126.       -.209        54.4        9.06        2.32    
HARK   5.7    16.1        8.84        50.9        4.69        2.88    
HBRK   2.8    .289e+06    501.        51.3        8.34        2.91    
HKLO    .9    .284e+06    499.        49.0        7.00        2.93    
HOB2   2.9    85.8       -.223        47.4        5.00        2.71    
IISC   1.9    82.3       -.192        69.5        6.03        1.90    
IRKT   6.5    .156e+06    72.3        67.7        5.46        1.95    
KELY    .6    .292e+04   -1.89          .         6.00        1.64    
KERG   4.8    186.        8.12          .         5.67        2.47    
KIRU   4.8    585.       -.308        53.8        7.00        2.26    
KIT3   1.9    171.       -.210        62.1        6.03        2.81    
KOKB*  5.2    239.       -.330        73.3        6.81        1.66    
KOSG*  4.5    1.04       -19.7        47.3        5.64        2.48    
KOUR    .9    1.71       -1.40          .         7.00        2.05    
KWJ1   4.8    727.       -.239        58.4        8.48        1.91    
MAC1   4.4    89.5       -.188        34.0        4.96        2.42    
MAD2   4.7    .569        .912        94.2        7.00        2.35    
MADR*  3.9    .625       -1.09          .         6.52        2.53    
MALI   4.5    174.       -8.03          .         8.00        2.36    
MAS1   5.8    136.        .236        43.5        5.00        2.49    
MCM4   5.7    91.5       -.174        33.4        4.19        1.88    
MDO1    .9    13.7        9.61        34.0        6.00        2.32    
MDVO   2.8    .907        450.        68.3        7.00        1.72    
MKEA   5.8    27.7       -.266        42.3        6.47        2.59    
NLIB   2.9    .799       -.680e-01    50.7        5.35        2.67    
NOTO   3.9    .612        2.61        39.0        7.39        2.69    
ONSA    .9    .270       -3.38        41.0        5.00        2.13    
PERT   5.7    2.21       -9.34        52.7        5.17        2.60    
PIE1   1.0    42.6        .119        49.0        6.00        2.56    
PLTC    .9    .289e+06    505.        51.0        7.00        2.73    
RCM6   2.8    130.       -.172        58.8        8.43        2.32    
REYK   4.8    81.6       -.198        55.7        5.81        2.17    
SANT*  4.9    848.       -1.55        40.6        5.75        1.69    
SELE   1.8    118.       -.234        34.5        5.00        3.20    
SHAO    .9    108.       -.235        60.0        5.00        2.68    
SOFI    .9    104.       -.209        48.0        5.00        2.80    
STJO   2.8    2.84        .183        39.6        5.66        2.97    
TAEJ    .9    .283e+06    434.        44.0        6.00        2.88    
TAHI   2.8    118.       -.208        72.8        5.67        2.57    
THU1   1.9    81.9       -.159        49.2        6.00        2.51    
TID2*  4.5    .367       -.232        39.3        5.60        2.52    
TOUL    .9    .362       -.691e-01    60.0        6.00        2.66    
TSKB   1.0    .927       -.238        44.0        5.00        2.88    
USNO   1.0    .998       -.924e-01    58.0        6.00        2.81    
USUD   3.7    .775        .108        40.8        6.06        2.85    
WHIT    .9    88.7       -.269        38.0        4.00        2.54    
WSMN    .9    .291e+06    497.        66.0        8.00        3.18    
WTZR*  3.6    1.18       -1.60        64.0        6.04        2.79    
WUHN   4.7    5.91       -.557e+04    46.6        6.45        3.11    
YELL*  1.8    .912       -.550        45.5        5.00        1.94    
PRN01  6.5    80.7        26.4        54.4        6.45        2.53    
PRN02  6.7    81.2       -394.        55.7        5.74        2.40    
PRN03  6.4    83.0        44.3        54.2        6.22        2.17    
PRN04  6.8    82.2        42.6        53.2        6.00        2.42    
PRN05  6.7    83.1        109.        51.5        6.02        2.44    
PRN06  6.4    79.2       -.470        53.2        5.86        2.39    
PRN07  6.5    80.3        752.        51.7        6.02        2.31    
PRN09  6.7    84.0       -8.64        54.1        6.17        2.31    
PRN10  6.7    79.9        11.6        54.2        5.87        2.30    
PRN14  6.7    82.0        21.3        48.2        6.18        2.47    
PRN15  6.7    3.30        459.        54.8        6.31        2.24    
PRN16  6.8    79.9        24.3        52.4        6.16        2.55    
PRN17  6.4    82.4       -157.        55.1        5.89        2.16    
PRN18  6.5    82.1        3.52        49.2        5.73        2.59    
PRN19  6.7    81.6        176.        52.7        5.73        2.55    
PRN21  6.7    79.1        74.9        51.6        6.59        2.40    
PRN22  6.6    80.5        11.8        51.0        6.31        2.49    
PRN23  6.7    81.1        2.71        55.0        6.60        2.53    
PRN24  6.8    82.1        719.        52.3        5.74        2.41    
PRN25  6.7    81.6       -5.94        49.6        6.62        2.40    
PRN26  6.3    80.4       -6.97        50.6        5.87        2.08    
PRN27  6.7    81.0        39.7        50.9        5.73        2.52    
PRN29  6.5    78.9        277.        50.3        7.64        2.69    
PRN30  6.7    79.9       -76.1        53.4        5.73        2.47    
PRN31  6.5    80.4       -.557        54.9        6.75        2.28    
_______________________
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  8 17   97  8 18   97  8 19   97  8 20   97  8 21   97  8 22   97  8 23
prn   3d rss (cm)
  1     291        284        344        242        263        316        369   
  2     326        536        267        172        261        274        220   
  3     284        243        210        231        446        483        793   
  4     208        214        439        444        302        347        260   
  5     272        290        356        392        416        180        215   
  6     647        917        680        833        668        689        866   
  7     363        582        252        317        370        576        327   
  9     329        392        305        417        250        158        249   
 10     276        282        769        266        752        672        636   
 13     228        246        624                                               
 14     286        392        566        998        948        624        200   
 15     208        196        264        200        472        391        170   
 16     583       1728        447        224        342        509       1444   
 17     212        146        136        341        665        137        215   
 18     406        457        383        576        613        670        543   
 19     473        472        525        434        512        844       1083   
 21     233        210        171        299        313        284        236   
 22     516        303        364        188        262        215        466   
 23    1010       1437        723        766       1164        301        345   
 24     359        317        483        295        370        622        405   
 25     373        336        398        375        451        294        238   
 26     247        241        192        274        408        382        400   
 27     358        319        430        463        343        434        452   
 29     613        563        405        266        432        464        298   
 30     266        232        207        250        198        223        188   
 31     695        567        798        413        370        464        274   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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