Subject: [IGSREPORT-4430] Wk 0935 JPL Analysis Report
From: D C Jefferson
Date: Mon, 22 Dec 1997 14:52:04 PST

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IGS Electronic Report    Mon Dec 22 14:52:04 PST 1997      Message Number 4430
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Author: D C Jefferson
Subject: Wk 0935 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0935 (DAYS 341-347, DATES 1997 Dec 07 - Dec 13)
******************************************************************************

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/0935.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09357.sum         This text file.
jpl09357.erp         Earth rotation parameters for GPS week 935.
jpl09357.snx         Ground station coordinates for GPS week 935, SINEX format.
jpl0935[0-6].sp3     GPS ephemerides for GPS week 935, sp3 format.
jpl0935[0-6].tro     Ground station troposphere estimates for GPS week 935.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 9.0 cm

According to the file gpsn4.txt obtained from tycho.usno.navy.mil, PRN24
was scheduled unusable day 344 for repositioning.  Data from this satellite
did not meet our intial orbit convergence criteria on this nor the following
day (345) and have been excluded from both days' analyses accordingly.  Data
from PRN08 were mismodeled day 347 and have been also excluded accordingly.

A large clock discontinuity (reset) of about 60 microseconds was detected for
PRN04 at approximately 18:50 on day 342.

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 days 344 and 345.
WARNING: Data from PRN08 deweighted days 341-367, excluded day 347.
WARNING: Data from PRN13 deweighted the entire GPS week 935.
WARNING: Data from PRN24 excluded days 344 and 345 due to a maneuver.
WARNING: Data from HOB2, KSTU excluded day 341.
WARNING: Data from IISC, KELY, ROCH, USNA excluded day 342.
WARNING: Data from NTUS, SANT excluded day 343.
WARNING: Data from HOB2, KOKB, SANT excluded day 344.
WARNING: Data from ROCK excluded day 346.
WARNING: Data from SANT excluded day 347.

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 935 (1997 Dec 07 - Dec 13)
     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
50789.50  16282  21130   253382  1815    3    3     8      8 37 11 27 -218 -208 
50790.50  16039  20964   251533  1883    3    3     8      8 37 10 27 -203 -209 
50791.50  15800  20780   249650  1883    3    3     8      8 37 10 27 -219 -189 
50792.50  15597  20623   247783  1851    3    4     9      9 37  9 26 -156 -184 
50793.50  15454  20432   245929  1858    3    4     9      9 37 10 26 -165 -185 
50794.50  15308  20278   244064  1871    3    4     8      8 37  9 27 -193 -185 
50795.50  15105  20145   242231  1795    3    3     8      8 37  9 26 -243 -191 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 935:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 935 (1997 Dec 07 - Dec 13)
      97 12  7   97 12  8   97 12  9   97 12 10   97 12 11   97 12 12   97 12 13
prn   3d rss (cm)
  1      13         12         14         12         14         10          5   
  2       6          8          9          7          8          8          6   
  3      10          6          8          6          7         10          8   
  4      10          9         11          7         10         24         17   
  5       8          9         12         10         10          7          6   
  6       7          8          7          6          7          9          7   
  7      13          8          8         12         10          7         10   
  8      41         48         42         54         57         49              
  9       6          5          4          7          7          5          4   
 10       5          8         14         10          7          6          8   
 13      33         37         30         44         36         28         35   
 14       9         10          9         24         19         29         27   
 15      11          7          8         13         12          9          9   
 16       8         11         13          7         10         18         17   
 17       8          8          7          7         10          8          7   
 18       9          9          6          7          9          8         17   
 19       9          8          8         10          8         11          7   
 21      15          6          7         10         13         16          8   
 22       8          9         12          7         11         16         13   
 23      16          8          9          9          7          9          7   
 24       8          7         11                               10         11   
 25      17         15         12         10         25         21         11   
 26       9          8          5          6          8          8          8   
 27       8          9          6          6          5          6          6   
 29       8         10          9          7          6          6          9   
 30       6          6          9          8          8          8          8   
 31      11          6          9          6         10         10          6   
_______________________
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 935 (1997 Dec 07 - Dec 13)
 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*  6.7    .867e-01    2.35        48.2        4.00        3.02    
ANKR    .9    154.        .251        54.0        4.00        3.10    
AREQ   5.9    99.3       -1.22        52.6        4.36        2.10    
ASC1   6.5    .137e+05   -1.53        68.5        4.75        1.57    
BAHR   6.0    .481        233.        43.0        4.85        3.13    
BRUS   2.0    .133       -2.10        62.0        4.54        2.65    
CAS1   6.8    .260e+04    80.0        37.1        5.46        1.28    
CASA   2.0    9.46        197.        30.0        3.54        2.47    
CHAT   6.9    113.       -1.27        75.2        5.15        2.61    
CICE   1.0    92.1       -1.69        32.0        5.00        2.68    
COCO   6.9    .100e+07   -.275e+04    42.4        4.75        2.94    
CRO1   7.0    393.       -1.26        44.6        5.31        1.83    
DGAR   6.7    500.       -1.23        75.6        5.59        1.44    
EISL   7.0    124.       -1.25        54.4        5.60        2.70    
FAIR*  7.0    .104       -1.83        34.3        4.35        2.10    
FORT   6.9    16.4       -4.03        68.9        6.15        1.56    
GODE   1.0    .664e-01    .480e-01    50.0        4.00        2.18    
GOL2*  7.0    22.4       -1.43        75.6        4.19        2.02    
GUAM   6.9    142.       -1.25        54.4        6.60        2.31    
HARK   1.9    25.2        3.67        61.3        5.55        2.98    
IISC   5.9    91.1       -1.18        67.5        5.36        2.17    
IRKT   5.7    .130       -1.85        47.9        4.00        2.36    
KERG   1.9    108.        914.          .         5.00        2.67    
KIRU   2.8    .307e+04   -1.74        52.6        6.37        1.88    
KIT3    .9    107.        .241        57.0        4.00        2.84    
KOKB*  4.7    209.       -1.13        64.1        4.71        1.26    
KOSG*  6.9    4.67       -23.2        40.7        4.00        2.43    
KWJ1   6.8    116.       -1.27        62.7        6.59        1.66    
LPGS   4.9    746.       -1.50        65.6        5.41        2.60    
MAC1   4.4    94.8       -1.42        45.1        4.00        2.53    
MAD2*  6.9    554.       -.885        69.2        5.59        1.97    
MCM4   7.0    105.       -1.24        52.3        4.71        1.12    
MKEA   6.9    .604e-01   -2.09        47.1        4.74        2.58    
MOIN   5.8    188.       -1.12        63.8        7.50        1.58    
NICO   1.0    76.5       -1.91        30.0        4.00        2.61    
NOTO   1.0    .110       -4.84        31.0        5.00        2.76    
OHIG   6.8    .249e+05   -.384        63.3        4.90        1.73    
PERT   4.0    1.88       -9.33        50.8        4.26        2.62    
POL2   5.8    87.9       -1.53        51.9        3.84        2.59    
REYK   7.0    77.6       -1.24        57.1        6.30        2.05    
SANT*   .8    .265e+04    9.77        44.0        4.00        1.58    
STJO   3.9    .371e+07   -590.        44.8        4.55        2.14    
TAHI    .9    .168e+05    2.79        89.0        6.00        2.22    
THU1   6.9    76.9       -1.27        45.7        5.58        2.33    
TID2*  6.9    .995e-01   -1.26        40.4        5.46        2.75    
TSKB   1.0    2.40       -.680        46.0        5.00        2.50    
USUD   5.9    .808       -12.1        40.5        4.88        2.74    
WTZR*  6.6    63.9       -.619        64.7        4.61        2.59    
WUHN   5.9    10.9       -244.        47.2        4.53        2.43    
XIAN    .9    103.        .260        55.0        4.00        2.98    
YAR1*  4.9    230.       -1.37        42.2        4.22        2.31    
YELL*  6.9    4.49       -1.90        39.5        4.25        1.85    
PRN01  7.0    81.6        33.2        55.4        5.00        2.14    
PRN02  6.8    80.1       -434.        56.8        5.16        2.23    
PRN03  7.0    80.8        77.6        54.3        5.00        2.18    
PRN04  6.8    .561e+04    17.2        50.4        5.00        1.94    
PRN05  6.8    80.4        125.        50.9        5.00        2.37    
PRN06  7.0    83.2       -1.34        52.2        5.00        2.16    
PRN07  7.0    82.3        762.        54.4        5.00        2.25    
PRN09  7.0    81.5       -22.7        51.6        5.00        2.25    
PRN10  7.0    83.2        14.8        53.9        5.00        2.16    
PRN14  7.0    77.2        23.5        54.0        5.16        2.28    
PRN15  7.0    3.64        498.        57.3        5.15        2.45    
PRN16  7.0    82.9        38.6        59.1        5.15        2.40    
PRN17  7.0    80.8       -168.        57.2        5.00        2.12    
PRN18  7.0    79.7        7.06        54.6        5.00        2.28    
PRN19  7.0    79.3        330.        53.9        5.00        2.28    
PRN21  7.0    80.8        8.89        56.9        5.30        2.14    
PRN22  6.5    80.8        33.2        52.3        5.00        2.01    
PRN23  7.0    78.9        5.68        55.7        5.15        2.27    
PRN24  5.0    83.8        778.        52.0        5.00        2.29    
PRN25  6.9    79.9       -7.90        52.7        5.00        1.97    
PRN26  7.0    79.4       -53.3        51.3        5.00        2.13    
PRN27  7.0    79.6        9.31        53.0        5.00        2.63    
PRN29  7.0    80.4        89.8        54.0        5.00        2.44    
PRN30  6.7    80.5       -15.7        52.4        5.00        2.28    
PRN31  7.0    81.0       -.735        57.9        5.00        2.45    
_______________________
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 12  7   97 12  8   97 12  9   97 12 10   97 12 11   97 12 12   97 12 13
prn   3d rss (cm)
  1     488        245        259        514        529        306        251   
  2     294        332        631        501        217        227        142   
  3     425        215        211        311        275        356        242   
  4     348        341        233        233        366        471        183   
  5     401        467        395        404        397        395        315   
  6     730        774        570        657        725        829        914   
  7     350        294        476        308        234        371        612   
  8   46096      62136      80294      99496                                    
  9     155        173        189        350        351        307        394   
 10     419        360        393        293        342        296        273   
 13     247        517        300        193        215        465        333   
 14     596        358        796        281       1554        433        478   
 15     197        367        512        423        272        225        199   
 16     976        450        502        322        403        866        979   
 17     493        633        448        438        406        324        523   
 18     301        243        270        371        309        235        251   
 19     634        288        510        354        201        841        538   
 21     277        581        241        410        401        378        730   
 22     604        466        324        655        448        495       1515   
 23    1060       1252        601        920        930       1107        665   
 24     311        297        167                              566        404   
 25     541        725        660        378        172        368        415   
 26     223        283        421        197        234        305        328   
 27     221        434        385        330        320        396        166   
 29     160        332        484        801        185        224        612   
 30     267        255        363        259        301        525        343   
 31     210        305        191        170        209        360        521   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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