Subject: [IGSREPORT-4289] Wk 0928 JPL Analysis Report
From: D C Jefferson
Date: Mon, 3 Nov 1997 13:46:53 PST

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IGS Electronic Report    Mon Nov  3 13:46:53 PST 1997      Message Number 4289
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Author: D C Jefferson
Subject: Wk 0928 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0928 (DAYS 292-298, DATES 1997 Oct 19 - Oct 25)
******************************************************************************

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/0928.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09287.sum         This text file.
jpl09287.erp         Earth rotation parameters for GPS week 928.
jpl09287.snx         Ground station coordinates for GPS week 928, SINEX format.
jpl0928[0-6].sp3     GPS ephemerides for GPS week 928, sp3 format.
jpl0928[0-6].tro     Ground station troposphere estimates for GPS week 928.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 10.0 cm

According to IGSMail Message No. 1709, the receiver and antenna at MALI
were changed on day 296.  We have deliberately excluded data from this
site on this and the previous day (295).

Data from PRN13 exceeded our initial orbit convergence criteria on days
292-294.  Additionally, data from this satellite were mismodeled on days
297 and 298.  PRN13 was included only on days 295 and 296, and its data
were heavily deweighted on these days.

Similarly, data from PRN14 were mismodeled on days 297 and 298.  We have
chosen to exclude this satellite on these days.

A large clock discontinuity (reset) of about 88 microseconds was detected for
PRN21 at approximately 13:20 on day 294.

Beginning this week we add a new candidate station.  As with other sites,
this station is 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)
ZECK (Zelenchukskaya, Russia)     3451174.9502   3060335.4004   4391955.6602

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 295-297.
WARNING: MKEA (not ALGO) used as reference clock day 298.
WARNING: Data from PRN13 deweighted days 295 and 296; excluded days 292-294,             297, and 298.
WARNING: Data from PRN14 excluded days 297 and 298.
WARNING: Data from SNI1 excluded day 292.
WARNING: Data from MATH excluded day 293.
WARNING: Data from BRMU, HOLP, SNI1 excluded day 294.
WARNING: Data from JOZE, MALI, WES2 excluded day 295.
WARNING: Data from HOLC, LAMA, MALI, POTM, SANT excluded day 296.
WARNING: Data from BRMU, CASA, HOLC excluded day 297.
WARNING: Data from CASA excluded day 298.

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 928 (1997 Oct 19 - Oct 25)
     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
50740.50  22637  32905   349574  2146    3    3    10     10 37 11 25   77 -321 
50741.50  22700  32625   347438  2125    3    3    10     10 37 11 25  131 -329 
50742.50  22789  32373   345328  2095    3    3    10     10 37 11 25  104 -330 
50743.50  22806  32153   343274  2014    3    3    10     10 37 11 26    6 -309 
50744.50  22788  31880   341253  2027    3    3    10     10 37 10 26    9 -305 
50745.50  22742  31628   339206  2068    4    4    10     10 37 10 24   45 -296 
50746.50  22676  31319   337144  2056    3    4    10     10 37 10 24    4 -297 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 928:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 928 (1997 Oct 19 - Oct 25)
      97 10 19   97 10 20   97 10 21   97 10 22   97 10 23   97 10 24   97 10 25
prn   3d rss (cm)
  1      25         11         14         24         32         21          8   
  2      10         13         13          5          7          8         10   
  3      26         20         30         24         24         44         25   
  4       8         13         24         15          5         10         10   
  5       4          5          4          5          5          7          6   
  6       6          3          5          7          9          9          8   
  7       5         10         10          7         12          7          7   
  9       8         29          9         10          8          8          9   
 10       5          7         13         10          7         11          9   
 13                                       49         35                         
 14      26         14         24         18         26                         
 15      16         14         10         12         16          7          9   
 16      11          9         11         10         16         10         23   
 17       8          9         26         23         13          8         10   
 18      21         10          7         11          5          6          9   
 19       7         10          9          8          4         12         14   
 21      12         23         22         23         17         22         11   
 22      11         11          9         11          7         12         11   
 23      17         21         25         16         22         23         22   
 24       6          6          7          5          6          8          8   
 25      11         16         13         22         22         17         10   
 26      11          4         10         10          7          4          7   
 27       6          7         10          6          6         10          8   
 29      10         10         11         12         14          6         10   
 30       5          6          6          8          7          7          5   
 31      12         11         15         18         13         12         14   
_______________________
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 928 (1997 Oct 19 - Oct 25)
 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    404.        .782        42.8        3.62        3.09    
AREQ   2.0    102.       -.635        52.5        4.00        1.83    
ASC1   6.4    249.       -.993        65.3        4.89        1.61    
BAHR   6.7    1.26        741.        50.2        5.79        3.12    
CAS1   6.9    .320e+05    104.        53.3        6.32        1.43    
CHAT   7.0    109.       -.997        78.9        5.16        2.52    
COCO   6.9    109.       -.313e+04    43.9        4.91        3.00    
CRO1   6.9    161.       -1.01        47.4        5.05        2.11    
DGAR   6.7    373.       -.951        76.2        6.15        1.64    
FAIR*  6.9    14.8       -.964        34.6        4.29        2.05    
FLIN   1.0    92.8       -1.71        55.0        4.00        2.83    
FORT   7.0    13.6       -.837        69.6        6.02        1.61    
GALA   2.9    101.       -1.81        76.6        5.00        1.74    
GOL2*  7.0    .108       -.359        48.6        4.15        1.97    
GUAM   7.0    126.       -1.01        57.2        6.75        2.34    
IISC   6.8    92.6       -.995        73.4        5.87        1.98    
IRKT   5.9    .150       -.947        52.1        4.86        2.42    
KELY    .5    89.1       -.625          .         6.00        1.30    
KERG   4.8    623.        805.          .         5.61        2.38    
KIRU   3.0    6.23        .325        48.0        6.00        2.10    
KIT3   1.0    117.       -.654        65.0        4.00        2.81    
KOKB*  6.5    135.       -.842        85.6        5.15        2.01    
KOSG*  7.0    5.12       -28.4        44.5        3.91        2.56    
KWJ1   7.0    107.       -1.00        66.8        6.30        1.79    
LHAS   3.0    95.6       -.303        49.6        5.00        2.60    
LPGS   1.9    353.       -.618        59.6        5.00        1.84    
MAC1   6.9    80.4       -.994        37.1        3.89        2.05    
MAD2   1.9    403.       -.385        88.0        6.53        1.83    
MADR*  7.0    .154       -1.37          .         6.21        2.29    
MALI   4.5    .170e+04   -46.5        84.5        7.50        1.87    
MAS1   4.0    73.1       -1.22        48.3        5.00        2.27    
MCM4   7.0    103.       -.997        41.2        5.00        1.34    
MDVO   2.0    .307        323.        71.5        7.00        2.11    
MKEA   4.9    13.2       -1.57        45.9        5.00        2.69    
NICO   2.9    75.7       -1.08        30.7        5.10        2.43    
NOTO   1.0    .126       -3.63        44.0        4.00        2.68    
NRC1   1.0    .631e-01    .297        53.0        3.00        3.10    
ONSA   1.0    .946e-01   -.423        48.0        4.00        2.28    
PERT   4.0    3.62       -3.09        52.0        4.27        2.81    
PIE1   2.8    .           .           41.4        4.00        2.31    
POL2   1.9    83.7       -.113        41.5        3.00        2.57    
REYK   5.0    79.1       -.908        57.6        5.81        1.82    
SANT*  4.7    394.       -1.27        45.8        4.61        1.45    
SELE   3.0    119.       -1.82        35.0        3.70        3.18    
SFER   1.0    .852        10.1        66.0        6.00        2.87    
SHAO   2.6    104.       -1.32        135.        4.41        2.27    
STJO   4.0    2.24       -.650e-02    42.7        4.00        3.05    
TAHI   3.6    128.       -.659        77.9        6.00        2.43    
THU1   2.0    88.5       -1.75        47.0        5.52        2.33    
TID2*  7.0    .117       -1.06        37.7        5.00        2.71    
TOUL   2.8    .451       -1.47        52.7        5.05        2.82    
USUD   4.0    20.3        3.41        43.3        5.00        2.60    
WES2   1.0    .400       -.442        53.0        4.00        2.75    
WTZR*  7.0    30.6       -1.20        62.7        4.31        2.68    
WUHN   3.9    9.13       -121.        54.6        5.27        2.70    
YAR1*  5.9    91.5       -1.23        39.5        4.88        2.11    
YELL*  7.0    1.00       -2.73        40.0        4.27        1.69    
PRN01  6.9    81.7        30.0        55.6        5.00        1.89    
PRN02  7.0    84.4       -416.        59.1        5.00        2.28    
PRN03  7.0    80.6        63.0        56.5        5.16        2.03    
PRN04  6.8    80.3        52.1        56.6        5.30        2.01    
PRN05  7.0    80.9        118.        55.1        5.16        2.39    
PRN06  7.0    82.1       -1.29        59.2        5.00        2.35    
PRN07  7.0    80.1        757.        52.5        5.00        2.25    
PRN09  6.6    82.5       -16.5        58.4        5.15        2.03    
PRN10  7.0    81.9        13.2        58.8        5.16        1.91    
PRN14  5.0    81.8        21.9        54.0        5.00        2.35    
PRN15  6.6    3.52        480.        62.9        5.16        2.00    
PRN16  7.0    81.2        31.8        57.3        5.00        2.58    
PRN17  6.7    81.2       -164.        61.4        5.16        1.95    
PRN18  7.0    81.8        5.12        53.3        5.00        2.39    
PRN19  6.8    80.3        275.        55.0        5.00        2.29    
PRN21  6.8    .715e+04    38.6        56.8        5.29        2.01    
PRN22  7.0    81.7        23.4        55.1        5.00        2.16    
PRN23  7.0    80.5        4.08        61.1        5.16        2.35    
PRN24  6.7    77.7        781.        58.9        5.15        1.96    
PRN25  6.6    82.3       -7.28        51.9        5.15        2.00    
PRN26  7.0    80.2       -31.4        57.8        5.00        2.24    
PRN27  6.8    81.8        3.93        56.6        5.00        2.47    
PRN29  7.0    80.1        241.        50.2        5.00        2.08    
PRN30  7.0    83.1       -6.55        53.4        5.15        2.35    
PRN31  6.9    80.4       -1.31        57.4        5.00        2.03    
_______________________
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 10 19   97 10 20   97 10 21   97 10 22   97 10 23   97 10 24   97 10 25
prn   3d rss (cm)
  1     601        336        522        267        359        263        349   
  2     408        321        254        354        342        509        422   
  3     196        187        284        350        184        290        368   
  4     596        248        385        387        272        285        293   
  5     396        470        477        420        278        354        515   
  6     386        747       1411        892        505        575        582   
  7     257        354        412        316        269        303        293   
  9     332        397        346        326        562        299        282   
 10     383        388        741        476        314        432        569   
 13                                    39541      41999                         
 14     871        550        796        508        492                         
 15     156        226        246        474        269        384        303   
 16    1044        263        313        305        273        410        525   
 17     180        420        400        308        274        283        574   
 18     371        555        459        310        555        666        522   
 19     338        408        333        513        538        378        906   
 21     245        259        296        453        714        187        535   
 22     397        447        449        497        601        741        568   
 23     292        331        546        290        568        999        534   
 24     594        407        442        520        753        468        582   
 25     468        396        385        529        504        928        446   
 26     390        263        325        192        238        249        313   
 27     488        417        748        507        917        559        610   
 29     460        232        286        543        429        153        813   
 30     232        256        353        379        187        487        412   
 31     290        286        411        307        260        342        239   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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