Subject: [IGSREPORT-5710] Wk 0992 JPL Analysis Report
From: D C Jefferson
Date: Tue, 26 Jan 1999 10:33:27 PST

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IGS Electronic Report    Tue Jan 26 10:33:27 PST 1999      Message Number 5710
******************************************************************************

Author: D C Jefferson
Subject: Wk 0992 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0992 (DAYS 10-16, DATES 1999 Jan 10 - Jan 16)
******************************************************************************

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/0992.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09927.sum         This text file.
jpl09927.erp         Earth rotation parameters for GPS week 992.
jpl09927.snx         Ground station coordinates for GPS week 992, SINEX format.
jpl0992[0-6].sp3     GPS ephemerides for GPS week 992, sp3 format.
jpl0992[0-6].tro     Ground station troposphere estimates for GPS week 992.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 12.0 cm

Beginning this week, we add four new candidate global 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)
AMC2 (Colorado Springs CO, USA)  -1248596.1047 -4819428.2784  3976506.0739
BZRG (Bolzano, Italy)             4312657.7845   864634.5986  4603844.5506
TIXI (Tixi, Russian Federation)  -1264873.0925  1569455.8387  6031003.5934
URUM (Urumgi, China)               190594.1177  4608583.4885  4391618.9990

A large clock discontinuity (reset) of about 637 microseconds was detected
for PRN22 at approximately 14:15 on day 012.  A similar reset of about 752
microseconds was detected for PRN26 at approximately 01:25 on the same day.

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: Data from PRN14, PRN18 excluded on day 010.
WARNING: Data from PRN14 excluded on day 011.
WARNING: Data from PRN18, PRN19 excluded on day 013.
WARNING: Data from COCO, FORT, NICO excluded day 010.
WARNING: Data from COCO, FORT, KSTU excluded day 011.
WARNING: Data from FORT, NYAL excluded day 012.
WARNING: Data from KERG, NICO, NYAL, PETP excluded day 013.
WARNING: Data from NICO excluded day 014.
WARNING: Data from COCO, LAMA excluded day 016.

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 992 (1999 Jan 10 - Jan 16)
version 2           
     MJD   XPole   Ypole  UT1R-UTC   LODR Xsg Ysg UTsg LOsg Nr Nf Nt   Xrt   Yrt
         10**-6" 10**-6"      .1us .1us/d 10**-6" .1us .1us/d          10**-6"/d
51188.50  134482  285314   6950231  10838  46  54  173  173 37  0 25 -1404  -636
51189.50  132848  284378   6939489  10645  47  54  174  174 37  0 26 -2224 -1434
51190.50  130521  282711   6929181   9971  44  51  165  165 37  0 27 -2435 -1523
51191.50  128073  281021   6919139  10114  55  61  189  189 37  0 25 -3159 -1715
51192.50  126165  279128   6908905  10354  46  56  176  176 37  0 27 -3334 -2508
51193.50  124169  276799   6898914   9627  43  52  170  170 37  0 27 -2206 -1799
51194.50  121906  275182   6889766   8670  49  55  179  179 37  0 27 -2351 -1669
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 992:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 992 (1999 Jan 10 - Jan 16)
      99  1 10   99  1 11   99  1 12   99  1 13   99  1 14   99  1 15   99  1 16
prn   3d rss (cm)
  1       5          4         16         17          6         10         13   
  2       9          8          8         16         11         12         13   
  3      14          6          7         13          8         16         11   
  4      20          5          8         34         31          7         12   
  5       6          4          7         13          5         11          6   
  6      21         13         12         13         10         17         16   
  7      13          8         13         15         11         16         14   
  8       5          4          9         11          7          7          6   
  9       5          4          9          9          6          8          9   
 10      17         10         20         17         11         10         10   
 13      19         12         10         46         32         14         18   
 14                            17         17         30         20          8   
 15       8         14         27         18         17         10         11   
 16      14          9          9         52         36         25         16   
 17      14         11         12         18          9          8         10   
 18                 18         27                    13         16         11   
 19      33         24         18                    27         24         19   
 21      10          3         16         15         10          9         10   
 22      24         18          9         18         13         20         15   
 23      10          9         17         13         10         12         13   
 24      11          8         10         16         17         14         10   
 25      13          5         11         18          8         15          9   
 26       8          7         11         14          9         12         16   
 27       9          8          9         16         17         12         14   
 29       4          3         44         64         20         10         13   
 30       8          4          6         11          7         10          9   
 31      13         13         12         15         12         12          9   
_______________________
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 992 (1999 Jan 10 - Jan 16)
 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*  6.9    12.9       -.978        63.0        4.00        2.53    
AREQ*   .9    141.       -1.03        66.0        4.00        2.76    
ASC1   5.1    671.       -1.04        69.0        4.14        1.56    
AUCK   3.0    104.       -1.04        43.7        4.36        2.56    
BAHR   6.6    1.55        72.5        40.7        5.05        2.83    
CAS1   4.1    10.8        .246e+04    38.4        5.61        1.07    
COCO   1.0    94.1       -1.05        62.0        7.00        2.24    
CRO1   6.9    152.       -1.04        48.0        5.72        1.88    
DAV1*  6.8    152.       -1.03          .         5.00        1.40    
DGAR   6.4    319.       -1.05        71.5        6.07        1.57    
EISL   6.9    131.       -1.04        60.5        5.60        2.97    
FAIR*  6.6    18.3       -.976        47.1        4.33        2.15    
FORT*  3.9    .258       -.990        81.6        6.53        1.41    
GALA   4.4    555.       -1.08        64.3        4.82        1.69    
GOL2*  6.9    .614e-01   -4.63        56.2        4.16        2.40    
GOUG   1.9    .289e+06    499.        63.5        5.06        2.63    
GUAM*  5.9    121.       -1.07        81.4        6.25        2.40    
HARK*  2.7    4.35       -.498        63.2        4.70        2.78    
HOB2*  2.9    .994e-01    9.13        51.6        5.70        2.87    
HOLB   1.0    13.6        8.54        34.0        3.00        2.70    
HRAO   5.0    631.        2.04        58.5        5.24        2.69    
IRKT*  6.8    .152       -1.05        46.0        4.45        2.61    
KELY   1.2    .344e+04   -1.04        36.0        5.00        1.72    
KERG*  2.8    .111e+06    68.9          .         5.40        1.98    
KOKB*  6.9    .184       -.965        69.3        5.30        2.39    
KUNM   6.8    152.       -1.04        70.6        5.00        2.52    
KWJ1*  6.6    .516e+04   -1.02        80.8        6.31        1.91    
LPGS   2.0    201.       -1.03        67.0        4.00        1.68    
MAC1*  6.6    .337e+04   -1.19        38.8        4.74        2.09    
MAD2*  6.2    .112e+04   -1.10        73.5        5.86        2.06    
MAG0    .9    .290e+06    479.        33.0        5.00        2.39    
MALI*  6.9    31.5        59.5        89.9        6.87        2.06    
MATE*  4.0    17.8       -3.91        43.8        4.76        2.82    
MCM4   2.0    90.0       -1.05        50.0        5.00        1.04    
MDVO   1.9    .738        225.        65.1        5.55        2.06    
MEDI   2.0    .379       -4.19        35.6        4.00        2.75    
NANO   1.0    17.3        454.        48.0        4.00        2.86    
NOUM    .9    .289e+06    497.        71.0        6.00        1.99    
NTUS   5.0    103.       -1.07        88.9        5.64        1.42    
NYA1   6.0    .143       -.894        42.9        5.70        1.48    
ONSA*  6.8    .847e-01   -6.40        37.8        3.63        2.20    
PERT*  1.0    17.9       -.171        56.0        5.00        2.90    
PETP   1.9    .180e+04   -.687        65.1        5.46        2.67    
PIE1*  1.0    .398e-01   -.621        56.0        4.00        2.28    
POL2   4.8    78.0       -1.04        62.9        3.83        2.73    
RIOP    .9    127.       -1.05        61.0        5.00        1.64    
SANT*  6.0    580.       -.390        51.6        3.76        2.44    
TID2*  5.5    .117       -1.45        43.7        5.85        2.38    
TIXI   3.0    94.6       -1.05        40.7        5.06        2.06    
TSKB*  6.9    1.29       -.939        44.9        4.00        3.07    
USNO   7.3    .           .           64.6        5.16        2.80    
USUD   3.8    .338        .712        44.5        4.00        2.77    
VESL   5.5    .288e+06    498.        61.2        4.51        2.37    
WTZR*  6.2    161.       -4.54        63.8        4.42        2.69    
YAR1*  5.7    82.4       -1.05        40.6        4.52        2.47    
YELL*  6.9    .388       -.913        45.7        4.58        1.68    
PRN01  6.9    81.3        70.0        57.2        5.00        2.28    
PRN02  6.8    81.9       -13.1        59.7        5.16        2.29    
PRN03  6.5    81.2        83.0        62.7        5.15        2.03    
PRN04  6.9    80.6        412.        56.1        5.00        1.97    
PRN05  6.9    79.8        180.        54.4        5.00        2.36    
PRN06  6.7    79.8       -1.40        54.3        5.00        1.98    
PRN07  6.6    81.6        804.        62.0        5.63        2.17    
PRN08  6.9    81.7        669.        56.3        4.86        2.39    
PRN09  6.9    79.4       -27.6        57.3        4.74        2.33    
PRN10  6.9    81.7        30.0        64.0        5.00        2.13    
PRN13  6.8    77.9       -443.        62.5        5.16        2.20    
PRN14  4.9    83.9        10.9        57.6        5.00        2.18    
PRN15  6.9    3.08        640.        60.7        5.00        2.37    
PRN16  6.9    81.4        95.9        59.2        5.00        2.15    
PRN17  6.9    78.8       -201.        54.4        5.00        2.04    
PRN18  4.8    80.7        19.7        64.4        5.21        2.07    
PRN19  5.9    79.4       -97.1        62.3        4.68        2.16    
PRN21  6.9    81.4        2.49        56.3        5.15        2.04    
PRN22  6.9    .620e+05    293.        59.8        5.00        2.01    
PRN23  6.9    80.3        7.40        58.7        5.15        2.13    
PRN24  6.9    143.        448.        60.0        5.00        2.10    
PRN25  6.9    79.4       -.858        53.6        5.00        1.97    
PRN26  6.6    .590e+05    245.        57.0        5.00        2.04    
PRN27  6.9    81.1        6.99        61.6        4.90        2.18    
PRN29  6.9    82.4        109.        59.1        5.32        2.08    
PRN30  6.9    80.7       -5.22        54.0        5.00        2.10    
PRN31  6.5    80.3        11.1        63.3        5.16        2.01    
_______________________
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
      99  1 10   99  1 11   99  1 12   99  1 13   99  1 14   99  1 15   99  1 16
prn   3d rss (cm)
  1     492        583        659        521        612        577        591   
  2     385        346        236        248        299        476        564   
  3     263        200        244        234        290        433        358   
  4     251        281        478        588        362        135        162   
  5     368        320        302        320        278        364        494   
  6     612        627        794        741        684        634        676   
  7     290        271        415        381        430        466        406   
  8     306        254        408        618        194        217        522   
  9     343        452        200        210        196        320        207   
 10     341        389        534        610        279        260        271   
 13     260        264        201        366        305        423        261   
 14                           785        505        939        361        542   
 15     193        227        246        243        219        398        121   
 16    1160        250       1680        448        746       1062        618   
 17     395        510        204        175        222        172        186   
 18                381        511                   354        269        324   
 19     162        310        181                   128        265        237   
 21     728        342        235        245        528        456        572   
 22     350        351        326        211        261        401        298   
 23     396        454       1014       1136        494        576        976   
 24     149        156        204        215        352        308        396   
 25     499        240        851        542        300        327        414   
 26     336        432        277        225        276        227        174   
 27     458        187        476        339        349        493        330   
 29     295        298        226       1310       1830        304        423   
 30     209        308        290        167        170        219        254   
 31     757        878        629        345        217        313        553   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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