Subject: [IGSREPORT-4588] Wk 0942 JPL Analysis Report
From: D C Jefferson
Date: Fri, 6 Feb 1998 21:14:53 PST

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IGS Electronic Report    Fri Feb  6 21:14:53 PST 1998      Message Number 4588
******************************************************************************

Author: D C Jefferson
Subject: Wk 0942 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0942 (DAYS 25-31, DATES 1998 Jan 25 - Jan 31)
******************************************************************************

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 (137.78.60.30),
directory pub/jpligsac/0942.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09427.sum         This text file.
jpl09427.erp         Earth rotation parameters for GPS week 942.
jpl09427.snx         Ground station coordinates for GPS week 942, SINEX format.
jpl0942[0-6].sp3     GPS ephemerides for GPS week 942, sp3 format.
jpl0942[0-6].tro     Ground station troposphere estimates for GPS week 942.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 11.0 cm

We continue to exclude all data from PRN13, and deweight all data from PRN08
this week.  Also, data from PRN16 did not meet our initial orbit convergence
criteria on day 025, and have been excluded accordingly.

Data from PRN10 and PRN18 were mismodeled on days 031 and 030 respectively.
We have excluded these satellites from our processing on the corresponding
days.

Beginning this week we add three new candidate stations.  As with other
sites, these stations are given the opportunity to participate in the orbit
and clock solution as the global site distribution varies.  The following
nominal coordinates were assumed:
                                         X (m)          Y (m)          Z (m)
AOML (Miami FL, USA)                 982296.8232  -5664607.2986   2752614.5003
HOLB (Holberg B.C., Canada)        -2503040.4762  -3188233.4245   4908701.6835
WILL (Williams Lake B.C., Canada)  -2084258.0661  -3313873.0862   5019853.2306

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: USNO (not NRC1) used as reference clock days 030 and 031.
WARNING: Data from PRN16 excluded day 025.
WARNING: Data from PRN10 excluded day 031.
WARNING: Data from PRN18 excluded day 030.
WARNING: Data from RCM6 excluded day 028.

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 942 (1998 Jan 25 - Jan 31)
     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
50838.50   3060  16633   168994  1932    5    6    10     10 37  7 25 -331  -17 
50839.50   2711  16657   167070  1916    4    4    10     10 37  9 26 -248  -46 
50840.50   2464  16692   165137  1949    4    4     9      9 37  9 26 -265   27 
50841.50   2195  16776   163121  2084    4    4     9      9 37  9 26 -291   10 
50842.50   1895  16803   161011  2136    3    4    10     10 37  9 26 -295  -36 
50843.50   1592  16868   158884  2117    4    4    10     10 37 10 25 -327   -5 
50844.50   1285  16931   156785  2081    4    4    10     10 37 10 25 -320   19 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 942:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 942 (1998 Jan 25 - Jan 31)
      98  1 25   98  1 26   98  1 27   98  1 28   98  1 29   98  1 30   98  1 31
prn   3d rss (cm)
  1      12          8          9          7         10          6         10   
  2       9          7         10          8          7          7          6   
  3      14          8          9         11         14         15          6   
  4      14         10         12         15         14          8          8   
  5      38         38          6          5          7          8          4   
  6      22         10         45         16         15         16         20   
  7      18         38         20         11         15         11          7   
  8      29         29         32         44         28         37         33   
  9      14         17          6          9          7          8          7   
 10      22         11         28         23         20          8              
 14      10         12         10         23         15          8         16   
 15      11          9          6         10         10          5          8   
 16                  8         15         17         11         17         13   
 17      21         11         10         10          6         30         15   
 18      16         17         16         13          8                    55   
 19      15          8          8          8         10         16         14   
 21       9          7          9          9         18         10          9   
 22      27         14         19         17         17         17         12   
 23      13         13         11         20         11         18         11   
 24      17          8         20         16         14         11          9   
 25      10         10          5          7         10         16          7   
 26      30         26         15          7          7          8         18   
 27      12          7         12         10         12         12          7   
 29      10          8          8          9         11          6         11   
 30      11          7         11          7          9          6         11   
 31      12         10          9         19         12         23         12   
_______________________
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 942 (1998 Jan 25 - Jan 31)
 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   3.0    9.30        7.19        39.4        5.06        2.71    
ALGO*  7.0    .433        7.28        46.0        4.00        3.07    
ANKR   3.9    130.        .600e-01    61.0        4.28        2.86    
AREQ   3.9    102.       -.147e-01    53.3        5.04        2.47    
ASC1   6.6    .265e+04   -.365e-01    80.9        5.04        1.45    
BAHR   6.7    .498        234.        42.8        4.97        3.18    
BRAZ   2.6    118.        .555e-01    65.6        6.66        2.01    
BRUS   3.0    .337        6.00        61.7        4.00        2.75    
CAS1   5.6    .580e+07   -.158e+05    39.7        5.55        1.24    
CASA   2.0    21.0        66.6        35.0        4.00        2.45    
CHAT   2.8    110.       -.160        78.2        5.00        2.63    
CHUR   1.0    1.94       -1.71        42.0        5.00        1.77    
CRO1   6.4    140.       -.414e-01    44.0        5.62        1.94    
DGAR   6.6    181.       -.304e-01    73.6        6.04        1.55    
EISL   6.8    133.       -.175e-01    54.5        5.75        2.80    
FAIR*  4.3    .166       -.412        36.2        4.24        2.20    
FLIN   4.0    83.4       -.899e-01    38.0        3.81        2.33    
FORT   6.0    .160       -.159        69.2        6.86        1.43    
GOL2*  2.9    .681       -.479        61.4        4.37        1.90    
GRAZ   1.0    1.28        .908e-02    61.0        4.00        2.48    
GUAM   4.9    112.       -.613e-01    61.0        6.01        1.91    
HARK   6.9    7.04       -4.42        55.5        5.44        2.70    
HOB2   1.0    80.5        .478e-01    47.0        5.00        2.33    
IISC   6.6    175.       -.194e-01    68.7        5.00        2.45    
IRKT   5.8    47.7        .489e-01    47.3        5.00        2.42    
KERG   5.6    135.        .122e+04      .         5.50        2.49    
KIRU   3.0    3.07        4.50        52.7        5.70        2.29    
KOKB*  6.5    .345e+05   -132.        60.1        4.76        2.39    
KOSG*  7.0    1.68       -10.6        41.5        3.60        2.45    
KOUR   4.0    2.76        .808          .         6.26        1.36    
KWJ1   5.8    174.       -.523e-01    59.0        6.18        1.64    
LPGS   1.9    650.        .686e-01    56.5        6.00        3.04    
MAC1   2.5    .306e+04    .507        48.0        4.36        2.06    
MAD2*  6.3    251.       -.541e-01    76.8        5.99        2.13    
MALI   3.4    .226e+05   -44.7          .         6.74        2.03    
MAS1   2.9    2.43        .481        44.3        4.69        2.54    
MDO1    .8    18.4       -23.5        32.0        4.00        2.60    
MDVO   3.9    .269        212.        67.3        5.53        1.83    
MKEA   3.9    .627e-01    .186        51.9        4.54        2.64    
MOIN    .8    119.       -.275        70.0        6.00        1.82    
NRC1   5.1    .           .           68.7        4.00        3.05    
OHIG   5.3    .226e+05    1.10        59.0        4.34        1.22    
PERT   7.0    20.4       -15.2        51.1        4.46        2.61    
PIE1   1.0    .631e-01   -.130e-01    41.0        4.00        2.45    
POL2   1.8    84.4        .588e-01    51.0        4.00        2.71    
QUIN    .7    .279e+05   -5.94        62.0        5.00        2.08    
RCM6   2.0    91.2        .545e-01    87.6        4.52        2.67    
REYK   7.0    75.1       -.282e-01    55.9        6.17        1.98    
SANT*  5.6    .202e+04   -.115        44.9        4.18        1.20    
SELE   2.8    99.7       -.151        34.4        3.69        2.83    
STJO   4.0    54.6        .175        43.6        4.27        2.55    
TAEJ   1.0    3.05        950.        43.0        5.00        2.37    
TID2*  5.6    10.4       -.715e-01    38.6        5.51        2.58    
TSKB   1.0    1.38       -1.28        40.0        4.00        3.04    
USNO   2.0    .           .           55.0        5.00        2.90    
USUD   4.5    .804        .907        42.5        4.67        3.08    
WHIT   1.0    102.        .749e-01    50.0        4.00        2.54    
WTZR*  7.0    .894e-01    1.32        63.2        4.16        2.61    
WUHN   4.8    7.16       -302.        45.2        4.21        2.40    
XIAN   1.0    87.7       -.230        55.0        4.00        2.84    
YELL*  7.0    31.6       -9.34        38.6        4.58        1.76    
PRN01  7.0    80.9        38.1        56.7        5.15        2.30    
PRN02  7.0    81.0       -449.        59.7        5.00        2.30    
PRN03  6.6    81.5        94.0        57.7        5.15        2.11    
PRN04  6.9    79.5        8.72        53.5        5.00        2.12    
PRN05  6.9    78.1        133.        51.5        4.89        2.63    
PRN06  6.7    79.7       -.241        51.7        5.00        2.02    
PRN07  6.7    81.0        767.        57.1        5.00        2.36    
PRN09  7.0    81.5       -27.9        52.4        5.00        2.34    
PRN10  5.9    80.6        17.9        53.2        5.00        1.95    
PRN14  7.0    79.2        26.1        51.9        4.88        2.36    
PRN15  7.0    2.64        517.        55.9        4.88        2.48    
PRN16  6.0    81.3        46.9        57.2        5.00        2.34    
PRN17  7.0    82.9       -172.        56.6        5.00        2.14    
PRN18  6.0    83.2        10.5        55.7        5.36        2.26    
PRN19  7.0    80.4        367.        60.0        5.00        2.02    
PRN21  7.0    81.3        19.8        56.1        5.00        2.20    
PRN22  7.0    83.6        43.5        55.5        5.00        2.27    
PRN23  7.0    79.6        9.11        54.6        5.00        2.14    
PRN24  6.9    81.9        754.        54.1        5.00        2.33    
PRN25  7.0    82.3       -6.83        51.9        5.00        2.00    
PRN26  6.8    82.3       -81.4        55.8        5.00        2.07    
PRN27  7.0    83.5        16.0        56.7        5.00        2.21    
PRN29  7.0    78.4        89.4        54.9        5.00        2.50    
PRN30  7.0    83.5       -22.6        50.6        5.00        2.36    
PRN31  6.6    82.7        .800        56.7        5.00        2.12    
_______________________
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
      98  1 25   98  1 26   98  1 27   98  1 28   98  1 29   98  1 30   98  1 31
prn   3d rss (cm)
  1     525        274        562        632        509        393        378   
  2     482        264        169        209        263        459        240   
  3     380        557        295        310        331        341        305   
  4     331        292        275        290        323        349        340   
  5     252        244        266        195        230        325        495   
  6     617        594        699        668        554        469        578   
  7     756        459        476        292        335        491        514   
  8    1752        642        660       1241        322        532        514   
  9     205        169        147        142        216        489        393   
 10     309        356        369        319        327        842              
 14     709       1689        803       2153        571        351        689   
 15     279        403        412        252        203        220        298   
 16               1500       1463        977       1219       1230        976   
 17     580        439        211        414        442        215        464   
 18     383        938        643        586        618                   550   
 19     587        370        746        223        462        515        142   
 21     296        315        199        201        320        465        336   
 22     363        519        449        488        312        354        507   
 23     894       1105        493        498        657        734        464   
 24     251        376        384        408        426        394        510   
 25     256        290        275        309        303        782        240   
 26     588        417        226        288        401        181        355   
 27     367        444        340        259        469        695        387   
 29     188        174        230        250        295        362        374   
 30     334        232        173        232        254        209        204   
 31     333        206        271        352        231        415        261   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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