Subject: [IGSREPORT-5355] Wk 0975 JPL Analysis Report
From: D C Jefferson
Date: Mon, 28 Sep 1998 14:10:04 PDT

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IGS Electronic Report    Mon Sep 28 14:10:04 PDT 1998      Message Number 5355
******************************************************************************

Author: D C Jefferson
Subject: Wk 0975 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0975 (DAYS 256-262, DATES 1998 Sep 13 - Sep 19)
******************************************************************************

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/0975.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09757.sum         This text file.
jpl09757.erp         Earth rotation parameters for GPS week 975.
jpl09757.snx         Ground station coordinates for GPS week 975, SINEX format.
jpl0975[0-6].sp3     GPS ephemerides for GPS week 975, sp3 format.
jpl0975[0-6].tro     Ground station troposphere estimates for GPS week 975.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 9.0 cm

Data from PRN29 and PRN18 were mismodeled on days 257 and 261 respectively.
Data from these satellites have been excluded from the processing of the
corresponding days appropriately.

A large clock discontinuity (reset) of about 48 microseconds was detected
for PRN04 at approximately 15:25 on day 257.

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 USNO) used as reference clock days 258 and 259.
WARNING: Data from COCO, NYAL excluded day 256.
WARNING: Data from PRN29, COCO, HOB2, KELY, NSSP, TROM excluded day 257.
WARNING: Data from BARB, COCO excluded day 258.
WARNING: Data from COCO, CRO1 excluded day 259.
WARNING: Data from COCO, CRO1, HOB2, MAG0 excluded day 260.
WARNING: Data from PRN18, COCO, CRO1, DAV1, HOB2 excluded day 261.
WARNING: Data from COCO, CRO1, DAV1, HOB2 excluded day 262.

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 975 (1998 Sep 13 - Sep 19)
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
51069.50   97994  465505  -1533163   9166  47  56  188  188 37  0 27  2398  -683
51070.50  100666  465018  -1542152   8813  50  56  192  192 37  0 26  2529    91
51071.50  103201  464864  -1551354   9590  46  50  185  185 37  0 27  2469  -455
51072.50  105611  464439  -1560974   9650  47  53  191  191 37  0 27  2498  -257
51073.50  107543  464251  -1570716   9835  50  57  197  197 37  0 27  1108  -351
51074.50  108754  463342  -1580678  10088  54  61  202  202 37  0 26  1199 -1101
51075.50  109980  461761  -1591265  11087  47  57  199  199 37  0 27  1405 -1633
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 975:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 975 (1998 Sep 13 - Sep 19)
      98  9 13   98  9 14   98  9 15   98  9 16   98  9 17   98  9 18   98  9 19
prn   3d rss (cm)
  1      11          7          4          5          7          8          6   
  2       7          9          4          9         10         13          4   
  3      24         19         27         16         13         17         12   
  4      11          8         13          9         10         11         11   
  5       5          7          6          9          6          4          7   
  6       8          7          9          6          6          6          6   
  7       4          7          9          8          5         10          8   
  8       4          7         12          9          7          7          8   
  9       6          7         11         12          7          6          5   
 10       8          6          9          9          7         13         13   
 13       6          9          7          8          9          9         10   
 14       7         11         22          8          9         18         12   
 15      10          5          9         10          6          9          6   
 16       6          4          7         12          8         19         10   
 17      12          9         16         11         16         15         10   
 18       8          6          8          8          8                     9   
 19       7          6          7          7         15         18          8   
 21      17         12         16         16         17         17         16   
 22       7          9          4          5         10         16          9   
 23      32         14         21          8          8         18         14   
 24      17         12         15         10         14         22         21   
 25      20          7          7          9          8          9          8   
 26      12          7          7         10          5         10         13   
 27       6          6          8         10         15         11          6   
 29      14                     7          8          9          8          5   
 30       5          6          8         10          5          7          4   
 31      16         10         10         11         10         13         10   
_______________________
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 975 (1998 Sep 13 - Sep 19)
 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    .113        .941e-01    66.4        4.60        2.65    
AREQ*  1.0    129.        .847e-01    66.0        4.00        1.99    
ASC1   6.2    .176e+04    .107        64.8        5.15        1.74    
AUCK   4.0    90.6        .806e-01    46.0        4.27        2.72    
BAHR   2.0    1.01        774.        43.0        6.06        2.83    
BARB   2.8    107.        .144e-01    31.3        7.05        2.78    
CAS1   6.6    9.47        .203e+04    37.7        5.60        1.32    
CASA   1.0    20.7        112.        49.0        6.00        2.71    
CRO1   3.0    295.        .836e-01    59.4        6.00        1.76    
DAV1*  4.9    148.        .113          .         4.62        1.57    
DGAR   4.9    .189e+04    .128        75.9        4.88        1.77    
EISL   7.0    130.        .854e-01    59.9        4.88        2.78    
FAIR*  5.8    .157e+06   -815.        49.3        4.68        2.20    
FORT*  6.0    12.2        .153        78.5        5.18        1.55    
GALA   5.9    .136e+05    .319e-01    65.1        4.00        1.32    
GOL2*  7.0    .142        1.19        53.3        5.06        2.35    
GUAM*  6.0    149.        .563e-01    79.7        6.86        1.93    
HARK*  5.9    10.8        38.0          .         4.19        2.64    
IISC   2.9    107.        .538e-01    74.1        5.00        1.77    
IRKT*  3.8    .167        .595e-01    64.2        4.26        2.57    
KELY   1.4    .334e+04    .327          .         5.00        1.23    
KERG*  7.0    .159e+04    .158e+04      .         5.00        2.53    
KIT3*  5.9    127.        .839e-01    76.7        4.35        1.74    
KOKB*  6.8    .311       -.579e-01    83.0        5.64        2.73    
KOUR*  1.0    2.30        .271        78.0        5.00        2.36    
KWJ1*  6.9    .223e+04    .128        82.2        6.60        1.82    
LHAS*  1.0    115.        .636e-01    76.0        4.00        2.40    
MAC1*  6.8    99.4        .890e-01    39.3        4.19        2.40    
MAD2*  2.0    583.        .991        57.5        5.00        2.42    
MAG0   1.0    .291e+06    493.        34.0        4.00        2.53    
MALI*  4.9    14.7       -147.        95.5        6.61        1.78    
MAS1*  5.0    3.46        1.75        58.6        4.00        2.51    
MATE*   .9    .843e-01   -1.24        54.0        4.00        2.36    
MDVO   1.9    .443        226.        67.1        6.00        2.07    
MEDI    .9    .101       -.112        40.0        4.00        2.81    
MKEA   1.9    7.45        .958e-01    64.1        5.21        2.52    
NANO   3.0    12.6        61.8        47.0        4.35        2.88    
NOTO   3.0    .192        996.        77.5        6.36        2.94    
NTUS   5.6    209.        .305e-01    94.1        5.70        1.51    
NYA1   5.0    .157       -7.91        45.0        5.62        1.64    
OHIG*  6.9    84.1        .878e-01    53.3        5.16        2.23    
ONSA*  7.0    .197       -.160        40.0        4.00        2.28    
PERT*  1.0    3.34       -1.06        58.0        5.00        2.62    
PETR   2.0    .287e+06    480.        44.5        5.00        2.97    
PIE1*  4.0    .497e-01   -.244e-01    49.5        4.83        2.65    
POL2   1.0    78.2        .620e-01    48.0        3.00        2.47    
SANT*  6.0    .327e+04   -1.44        45.0        4.26        1.17    
SUTH   4.9    99.7        .864e-01    51.7        4.62        2.62    
TID2*  7.0    .174        1.50        43.3        5.60        2.58    
TSKB*  7.0    1.75       -2.83        50.7        6.10        3.17    
USNO   5.4    .           .           63.4        5.81        2.58    
USUD   4.0    55.3        1.15        45.0        5.05        2.76    
WSLR   1.0    36.8        428.        46.0        4.00        3.14    
WTZR*  7.0    5.01       -.620e-02    66.5        4.46        2.80    
WUHN   3.0    5.72       -188.        53.7        5.00        2.49    
XIAN   2.0    121.        .873e-01    44.5        4.00        2.74    
YAKZ   3.0    .289e+06    446.        44.3        5.35        2.40    
YAR1*  7.0    89.9        .875e-01    43.5        4.00        2.49    
YELL*  7.0    .143        .681e-01    51.1        5.14        1.66    
PRN01  7.0    81.6        59.2        55.2        5.00        2.00    
PRN02  7.0    81.1       -532.        59.4        5.00        2.31    
PRN03  7.0    81.5        48.6        60.6        5.00        2.05    
PRN04  6.8    .380e+04    20.1        58.3        5.16        1.98    
PRN05  7.0    81.2        164.        57.0        5.00        2.45    
PRN06  7.0    82.0       -.610        59.9        5.00        2.21    
PRN07  7.0    79.6        791.        56.3        5.00        2.32    
PRN08  7.0    79.8        86.9        62.5        5.16        2.11    
PRN09  7.0    80.6       -10.6        62.1        5.00        2.40    
PRN10  7.0    81.6        26.5        62.0        5.00        2.07    
PRN13  7.0    78.7       -270.        56.8        5.00        2.20    
PRN14  6.9    83.1        4.02        58.2        5.15        2.09    
PRN15  7.0    3.02        600.        62.6        5.03        1.91    
PRN16  7.0    82.2        79.7        63.4        5.00        2.06    
PRN17  7.0    79.1       -189.        60.8        5.00        2.22    
PRN18  6.0    80.0        16.7        57.9        5.18        2.09    
PRN19  7.0    81.4       -42.6        60.0        5.00        2.06    
PRN21  7.0    81.1        58.1        60.5        5.45        1.95    
PRN22  7.0    79.7        1.11        59.2        5.00        2.07    
PRN23  7.0    81.1        4.27        62.2        5.16        2.22    
PRN24  7.0    78.8        732.        60.4        5.45        2.03    
PRN25  6.9    82.2       -6.00        58.3        5.15        1.98    
PRN26  7.0    81.6        400.        56.3        5.16        2.37    
PRN27  7.0    81.7        41.5        57.5        5.00        2.18    
PRN29  6.0    82.5        436.        56.3        5.00        2.11    
PRN30  7.0    81.2       -9.34        56.3        5.00        2.15    
PRN31  7.0    82.3        6.95        57.5        5.00        2.18    
_______________________
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  9 13   98  9 14   98  9 15   98  9 16   98  9 17   98  9 18   98  9 19
prn   3d rss (cm)
  1     240        232        214        290        304        365        234   
  2     362        384        220        169        236        329        410   
  3     173        264        296        179        191        282        214   
  4     240       1296        750        501        445        382        414   
  5     266        314        320        376        325        392        272   
  6     430        530        481        448        474        356        383   
  7     202        479        531        242        343        460        408   
  8     239       1111        198        224        182        152        594   
  9     437        972        186        232        415        199        220   
 10     347        312        242        274        363        262        253   
 13     976        178        385        489        261        472        693   
 14     652        491       1204        596        414       1091        740   
 15     339        140        149        413        237        651        185   
 16     309        422        554        592        349        560        336   
 17     339        833        197        335        253        151        190   
 18     481        496        350        616        781                  1047   
 19     201        225        161        177        170        170        178   
 21     257        292        287        373        486        282        360   
 22     254        527        550        490        562        603        265   
 23     424        297        251        391        477        472        230   
 24     539        504        817        341        499        748       1270   
 25     577        251        295        202        352        223        224   
 26     470        267        502        591        445        572        343   
 27     530        278        290        250        226        300        291   
 29     174                   667        236        268        298        153   
 30     384        191        234        408        290        254        186   
 31     291        281        386        288        290        235        213   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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