Subject: [IGSREPORT-4201] Wk 0924 JPL Analysis Report
From: D C Jefferson
Date: Mon, 6 Oct 1997 13:59:41 PDT

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IGS Electronic Report    Mon Oct  6 13:59:41 PDT 1997      Message Number 4201
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Author: D C Jefferson
Subject: Wk 0924 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0924 (DAYS 264-270, DATES 1997 Sep 21 - Sep 27)
******************************************************************************

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/0924.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09247.sum         This text file.
jpl09247.erp         Earth rotation parameters for GPS week 924.
jpl09247.snx         Ground station coordinates for GPS week 924, SINEX format.
jpl0924[0-6].sp3     GPS ephemerides for GPS week 924, sp3 format.
jpl0924[0-6].tro     Ground station troposphere estimates for GPS week 924.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 11.0 cm

We continue to deweight data from PRN13; this satellite does not appear in
any of our orbit products for this week.  Also, data from PRN22 did not meet
our initial orbit convergence criteria on days 267 and 268, and have been
excluded from these days' analyses accordingly.  Lastly, PRN29 exhibits
atypically high orbit repeatability on day 270.  Although used in this day's
analysis, we have elected to remove it from the corresponding orbit product,
jpl09246.sp3.

A clock reset (large discontinuity) of about 83 microseconds was detected for
PRN30 at approximately 01:05 UT on day 266.

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 days 264, 265, and 267-270.
WARNING: Data from PRN13 deweighted the entire GPS week 924.
WARNING: Data from PRN22 excluded days 267 and 268.
WARNING: Data from ANKR, JOZE, SNI1, TAIW excluded day 264.
WARNING: Data from ANKR, CAT1, CSN1, TAIW excluded day 265.
WARNING: Data from ANKR, CSN1 excluded day 266.
WARNING: Data from ANKR, CSN1, KELY excluded day 267.
WARNING: Data from ANKR, AZU1, SNI1 excluded day 268.
WARNING: Data from KELY, ROCK, SNI1, TAIW, UCLP excluded day 269.
WARNING: Data from KELY, SNI1, TAIW excluded day 270.

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 924 (1997 Sep 21 - Sep 27)
     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
50712.50  22097  40787   408980  2026    4    4     8      8 37 10 26   92 -266 
50713.50  22149  40532   406941  2051    3    4     9      9 37 10 26   90 -312 
50714.50  22172  40260   404894  2044    3    4     8      8 37 10 26   55 -324 
50715.50  22149  39930   402850  2044    4    4     9      9 37 10 25   25 -322 
50716.50  22133  39640   400778  2099    4    5     9      9 35  7 25   29 -308 
50717.50  22124  39276   398680  2098    3    4     8      8 37 10 26   71 -302 
50718.50  22074  38977   396617  2028    3    4     8      8 37 10 26  -18 -276 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 924:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 924 (1997 Sep 21 - Sep 27)
      97  9 21   97  9 22   97  9 23   97  9 24   97  9 25   97  9 26   97  9 27
prn   3d rss (cm)
  1      12          8         10         13         21         13         25   
  2       8         12         11          7         11          6         10   
  3      28         21         21         28         22         12         38   
  4       6          7         11          9          8          6         13   
  5       6          7          6          6          6          7         12   
  6       7         15         12         14         11         12         11   
  7       9         10          8          5          8          8         10   
  9      12          8         11          9          8         13         19   
 10       9          9         14         13          6          9         14   
 13      39         51         50         49         49         27         45   
 14      31          7          8          8         10         11         17   
 15      18         14         16          5         13         15         20   
 16      13          8          8          8         10          9         10   
 17      17         13          9         20         10          9         14   
 18      11          9         11         11          8         18         23   
 19      14         32         25         14          9         18         15   
 21      19         10         16          9         24         20         15   
 22      15          9          5                               16         30   
 23      10          7         14         22         17         11         17   
 24       7          8         13          9          5          5          6   
 25      11          7          8          6         10         21         29   
 26       6         13         17         12         15         16         13   
 27      10          6         10          8         17          8         10   
 29       7         10         10          7         10         34         96   
 30       8          9         12          8         12          8         17   
 31      21         14         10         11          8         12         20   
_______________________
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 924 (1997 Sep 21 - Sep 27)
 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    17.6        124.        43.0        4.00        2.70    
ALGO*  7.0    55.0        .166        44.0        5.82        3.11    
AREQ   2.0    92.6       -.167e-01    47.0        4.53        2.08    
ASC1   3.8    117.       -.443e-01    79.7        5.24        1.82    
BAHR   7.0    .655        743.        54.3        5.31        3.64    
BRAZ   2.0    121.       -.904e-01    66.4        6.00        2.28    
BRMU   1.0    131.       -.797e-02    43.0        6.00        2.94    
CAS1   6.9    18.5        170.        47.3        5.58        1.45    
CASA   1.0    24.5        558.        41.0        4.00        2.81    
CHAT   7.0    117.       -.344e-01    77.0        5.03        2.61    
CHUR   1.0    1.03        2.29        36.0        5.00        2.92    
CRO1   7.0    179.       -.378e-01    50.2        6.45        2.19    
DGAR   6.8    170.       -.239e-01    69.3        7.04        1.78    
FAIR*  7.0    .579e+05   -.160e+05    64.9        5.97        2.20    
FLIN   1.7    87.9        .632e-03    48.6        4.59        2.82    
FORT   6.0    6.73        .340e-01    66.0        6.00        1.73    
GOL2*  7.0    10.1        .830        49.1        4.54        2.03    
GUAM   7.0    132.       -.397e-01    65.1        6.60        2.03    
HARK   4.4    19.8       -4.76        55.3        4.67        2.85    
IISC   6.0    86.0       -.388e-01    73.1        5.52        2.31    
IRKT   7.0    19.8       -.151        63.2        4.46        2.36    
KELY   1.0    101.       -.312e-01    39.0        5.00        1.51    
KERG   6.0    .487e+04    162.          .         5.18        2.47    
KIRU   2.0    8.76        1.68        53.0        7.06        2.21    
KIT3   3.0    134.       -.633e-01    69.1        5.00        3.24    
KOKB*  5.5    186.        .860e-01    89.3        6.01        1.69    
KOSG*  6.0    6.63       -10.1        45.0        4.18        2.58    
KWJ1   4.8    102.       -.456e-01    70.0        6.83        1.69    
LHAS   2.9    98.7       -.690e-01    55.7        4.69        2.58    
MAC1   4.8    88.6       -.406e-01    35.4        4.00        2.29    
MAD2   4.9    .114e+04   -1.90        96.2        6.40        2.19    
MADR*  5.6    .434       -.638          .         5.88        2.22    
MALI   5.9    83.1        .519e-01      .         7.00        2.14    
MAS1   1.0    2.49        .658        47.0        7.00        2.30    
MCM4   5.9    182.       -.223e-01    39.0        4.84        1.48    
MDVO   3.9    4.03        568.        72.5        6.27        2.06    
MKEA   5.0    .364       -.118        54.1        5.21        2.38    
NICO   3.0    83.1       -.838e-02    31.0        4.70        2.56    
ONSA   1.0    .995e-01   -1.18        40.0        4.00        2.22    
PERT   7.0    2.55       -13.2        53.1        4.60        2.79    
PIE1   5.8    .           .           49.3        5.78        2.45    
POL2   4.0    90.1        .270e-02    49.9        4.07        2.64    
RCM6   1.0    189.       -.174e-01    70.0        6.00        2.50    
REYK   2.5    109.       -.734e-01    57.1        6.56        1.66    
SANT*  6.6    .265e+07   -.544e+04    49.1        5.00        1.78    
SHAO   1.0    86.9       -.560e-03    46.0        4.00        2.69    
SOFI   1.0    96.3       -.125e-01    38.0        4.00        3.07    
STJO   4.0    2.78        2.78        45.4        4.77        3.06    
TAHI   4.3    184.       -.288e-01    84.3        5.86        2.30    
THU1   5.9    76.6       -.278e-01    47.7        6.09        2.37    
TID2*  7.0    61.4       -.308        40.9        5.03        2.77    
TOUL   2.0    .592       -2.38        55.8        5.53        2.78    
USUD   7.0    3.08        .226        39.5        5.48        2.80    
WES2   2.9    .135       -1.69        56.7        8.21        2.50    
WTZR*  7.0    .206        .573        62.3        4.87        2.74    
WUHN   2.9    .856e+04   -16.2        51.7        5.07        2.59    
XIAN   1.0    86.1        .165e-01    44.0        4.00        2.98    
YELL*  7.0    .493       -1.96        45.3        5.15        2.13    
PRN01  6.9    81.1        29.0        63.6        5.75        2.34    
PRN02  7.0    81.5       -406.        59.0        5.16        2.63    
PRN03  7.0    80.8        55.5        62.2        5.46        2.11    
PRN04  7.0    81.4        48.4        57.7        5.15        2.15    
PRN05  6.9    80.1        115.        54.6        5.33        2.45    
PRN06  7.0    82.1       -.348        58.5        5.31        2.25    
PRN07  7.0    82.6        756.        53.3        5.00        2.18    
PRN09  7.0    83.5       -12.3        61.6        5.46        2.18    
PRN10  7.0    80.7        13.1        57.7        5.45        2.20    
PRN14  7.0    81.6        22.4        53.4        5.47        2.39    
PRN15  7.0    3.43        471.        60.2        5.31        2.07    
PRN16  7.0    82.5        29.1        59.1        5.15        2.56    
PRN17  7.0    81.9       -160.        60.3        5.32        2.28    
PRN18  7.0    79.1        4.82        53.5        5.30        2.28    
PRN19  7.0    83.7        236.        55.9        5.47        2.45    
PRN21  6.9    81.9        82.5        58.6        5.35        2.43    
PRN22  5.0    81.0        19.3        57.4        6.03        2.19    
PRN23  7.0    81.7        4.12        62.0        5.16        2.46    
PRN24  7.0    84.2        763.        57.3        5.45        2.33    
PRN25  7.0    79.5       -6.12        54.7        5.74        2.32    
PRN26  7.0    82.6       -19.8        57.6        5.60        2.19    
PRN27  7.0    81.4        1.64        57.7        5.00        2.48    
PRN29  7.0    81.1        280.        54.2        6.64        2.67    
PRN30  6.8    .703e+04   -30.1        57.8        5.56        2.58    
PRN31  7.0    81.6       -.499        57.3        5.16        2.08    
_______________________
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  9 21   97  9 22   97  9 23   97  9 24   97  9 25   97  9 26   97  9 27
prn   3d rss (cm)
  1     242        260        198        713        302        368        249   
  2     298        291        302        388        333        382        440   
  3     191        179        201        244        310        518        333   
  4     342        488        369        264        217        248        334   
  5     366        399        267        216        321        286        224   
  6     430        425        504        482        506        496        490   
  7     198        343        450        242        348        311        217   
  9     244        211        292        319        288        371        334   
 10     466        459        456        267        446        456        385   
 13     226        420        477        338        460        273        342   
 14     825        820        440        335        380        305        298   
 15     288        228        196        218        188        166        217   
 16     513        587        337        275        322        314        525   
 17     191        253        378        217        217        143        218   
 18     536        642        468        332        353        911       1304   
 19     469        656        987        486        362        706       1983   
 21     246        204        220        253        375        212        235   
 22     607        431        343                             2215        364   
 23     266        490        417        452        616        215        205   
 24     705        412        770        390        554        331        402   
 25     540        442        268        423        402        394        539   
 26     426        449        498        170        179        181        332   
 27     425        382        286        341        287        356        228   
 29     144        179        264        769        419        292        240   
 30     272        189        273        430        204        242        455   
 31     418        395        392        221        201        220        212   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

global:   albh algo areq asc1 bahr braz brmu cas1 casa chat chur cro1 dgar fair flin fort gol2 guam hark iisc irkt kely kerg kiru kit3 kokb kosg kwj1 lhas mac1 mad2 madr mali mas1 mcm4 mdvo mkea nico onsa pert pie1 pol2 rcm6 reyk sant shao sofi stjo tahi thu1 tid2 toul usud wes2 wtzr wuhn xian yell

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