Subject: [IGSREPORT-6020] Wk 1006 JPL Analysis Report
From: D C Jefferson
Date: Fri, 30 Apr 1999 11:00:07 PDT

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IGS Electronic Report    Fri Apr 30 11:00:07 PDT 1999      Message Number 6020
******************************************************************************

Author: D C Jefferson
Subject: Wk 1006 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 1006 (DAYS 108-114, DATES 1999 Apr 18 - Apr 24)
******************************************************************************

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/1006.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl10067.sum         This text file.
jpl10067.erp         Earth rotation parameters for GPS week 1006.
jpl10067.snx         Ground station coordinates for GPS week 1006, SINEX format.
jpl1006[0-6].sp3     GPS ephemerides for GPS week 1006, sp3 format.
jpl1006[0-6].tro     Ground station troposphere estimates for GPS week 1006.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 10.0 cm

Data from PRN07 and PRN08 were mismodeled days 111 and 114 respectively, and
have been excluded from the appropriate day's analysis  accordingly.  Also,
according to several IGS Mail Messages (Nos. 2242, 2248, etc.) and various
NANUs referenced therein, PRN27 is undergoing date testing beginning day 113.
We have excluded data from this satellite from our analyses on this and the
adjacent days this week.

Beginning this week, we add a new candidate global station.  As with other
sites, this stations 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)
PIMO (Quezon City, Philippines)   -3186294.1261   5286624.2781   1601158.2872

A large clock discontinuity (reset) of about 812 microseconds was detected
for PRN07 at approximately 08:00 on day 110.  It appears that the drift of
this satellite's clock experienced a shift from about 0 ns/s to about +3 ns/s
over the course of the 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: PIE1 (not USNO) used as reference clock days 108 and 110.
WARNING: GOL2 (not USNO) used as reference clock day 112.
WARNING: Data from PRN18 excluded the entire GPS week 1006.
WARNING: Data from PRN27 excluded days 112-114 due to Y2K/rollover testing.
WARNING: Data from CRO1, FORT, IRKT, KELY, MAG0, PETP, SUWN, TIXI, TROM, URUM,           YAKZ excluded day 108.
WARNING: Data from CSN1, DHLG, FORT, KELY excluded day 109.
WARNING: Data from CMP9, CSN1, DHLG, KELY, MKEA excluded day 110.
WARNING: Data from PRN07, CMP9, CSN1, DHLG, NYAL excluded day 111.
WARNING: Data from BRAN, CMP9, CSN1, DGAR, MAG0, STJO, UPAD excluded day 112.
WARNING: Data from BRAN, CSN1, GOLD, KELY, UPAD, WTZT excluded day 113.
WARNING: Data from BRAN, CSN1, GOLD, WTZT excluded day 114.

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 1006 (1999 Apr 18 - Apr 24)
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
51286.50    4224  248625   5778721  14197  54  56  190  190 37  0 26 -1462   427
51287.50    2506  248816   5764307  14631  53  55  185  185 37  0 26 -1898   -16
51288.50    1070  248729   5749653  14676  51  53  186  186 37  0 26 -1098   -39
51289.50    -206  248789   5735249  14133  53  54  189  189 37  0 25 -1002   310
51290.50   -1360  248896   5720987  14391  51  53  183  183 37  0 25 -1377   412
51291.50   -2634  249425   5706894  13795  51  52  185  185 37  0 25 -1268   521
51292.50   -4112  250389   5693287  13419  51  57  193  193 37  0 24 -1905   628
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 1006:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE               GPS week 1006 (1999 Apr 18 - Apr 24)
      99  4 18   99  4 19   99  4 20   99  4 21   99  4 22   99  4 23   99  4 24
prn   3d rss (cm)
  1       9          5          9          9          8          8          9   
  2      14          6         12          6          6          8         11   
  3      13         10          7          8         11          7          3   
  4      29         20          9          8          5          6          6   
  5       9          9         17          9         11         13         10   
  6      11         10          8         11         12         11         12   
  7      14         23         36                    16         14         23   
  8      15         17         14          8         10         10              
  9      12         16         12         10         11         18         25   
 10      18         10          8          5          5          7          7   
 13      12          9         10          8          6          9          7   
 14      19          9         12         10         12         10          8   
 15      10          9         16          7         11         10         12   
 16      12         10          6          6          7          9          8   
 17       9         11         11          6          8          7         14   
 19      21         18         11          7         10          8          7   
 21      12         12          8          6         10         11         11   
 22      16          9          5          7          4         11         10   
 23      13         22         16         16         14         14         18   
 24      48         13         10         11          6         11         11   
 25      13          5          3          7          4          7          5   
 26       8         19         14         14         15         14         12   
 27      10          6          7          5                                    
 29       9          6          5          7          6         10          6   
 30      10          7          9          8          9         11         22   
 31      10          7         17         10         10          9          8   
_______________________
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 1006 (1999 Apr 18 - Apr 24)
 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    9.90       -.803e-01    67.6        4.00        2.71    
AOML   1.9    .105e+06    5.62        55.0        5.50        2.22    
AREQ*  2.0    250.       -.976e-02    70.1        4.00        2.26    
ASC1   5.8    548.        .107e-01    74.7        5.73        1.56    
AUCK   5.0    90.9       -.167e-01    46.3        4.22        2.69    
BAHR   6.0    .504        210.        41.9        4.36        2.88    
BARB   1.0    105.       -.107        32.0        7.00        3.74    
BOGT   5.5    .688e+04    .253        72.9        5.19        1.67    
CAS1   1.8    18.4        584.        35.6        5.52        1.04    
DAV1*  5.9    146.       -.199e-02      .         5.17        1.42    
DGAR   2.9    808.        .169e-02    70.0        5.13        1.52    
EISL   6.9    164.        .387e-02    64.1        5.00        2.90    
FAIR*  7.0    .437        .211        57.2        4.45        2.25    
FORT*  1.9    .142       -.188        85.9        6.49        1.52    
GOL2*  7.0    .222       -.521        70.3        4.00        2.20    
GOUG   7.0    .289e+06    497.        58.9        4.74        2.75    
GUAM*  6.9    129.       -.635e-01    80.2        6.28        2.19    
HARK*  7.0    94.4       -.680e-02    62.4        5.04        2.79    
HOB2*  4.0    .143       -2.42        46.8        5.06        3.03    
HRAO   5.0    50.7        .573e-01    48.3        4.84        2.82    
IRKT*  6.0    .112       -48.7        57.6        5.00        2.56    
KIT3*  3.8    102.        .724e-01    82.0        4.77        1.70    
KOKB*  6.9    .721       -.168        82.3        5.31        2.52    
KOUR*  2.8    3.62       -5.03        114.        5.66        2.08    
KUNM    .8    232.        .336e-02    69.0        5.00        2.00    
KWJ1*  6.7    337.       -.308e-02    91.8        6.00        1.67    
LPGS    .9    197.       -.463e-03    54.0        5.00        1.66    
MAC1*  6.2    89.9       -.558e-02    39.1        4.50        2.02    
MAD2*  6.0    7.03       -.879        85.3        6.00        2.43    
MAG0   3.0    .289e+06    478.        30.3        4.69        2.13    
MALI*  7.0    22.3       -64.8        93.8        6.88        2.06    
MCM4   4.9    115.        .364e-02    51.0        5.00        1.12    
METS   1.0    .371       -1.54        51.0        4.00        2.34    
MKEA   2.0    .979e-01    6.87        63.0        4.53        2.66    
NOUM   1.0    .288e+06    496.        78.0        6.00        1.90    
NRC1   1.0    .617e-01   -.845e-02    93.0        4.00        2.46    
NTUS   2.4    101.       -.777e-01    92.0        5.74        1.39    
NYA1   6.9    .178        .265        41.5        5.31        1.91    
ONSA*  5.4    33.4       -.492e-01    48.1        4.33        2.44    
PERT*  1.0    2.31       -3.35        51.0        5.00        2.64    
PETP   2.0    147.       -.183e-01    63.0        5.00        2.87    
PIE1*  2.0    .           .           47.5        4.00        2.55    
PIMO   2.9    254.       -.431e-02    79.0        6.36        2.19    
POL2   2.0    110.        .787e-02    74.0        4.00        2.10    
RAMO    .9    .255e+06    423.        53.0        5.00        2.01    
REYK    .9    106.       -.603e-02    60.0        6.00        2.40    
RIOG   1.0    .289e+06    471.        57.0        5.00        3.14    
SANT*  5.1    757.       -.303        46.4        4.51        1.36    
SELE   1.0    119.        .249e-02    60.0        4.00        2.49    
SEY1   1.0    524.        .801e-01    84.0        7.00        1.24    
THU1*  1.0    68.0       -.389e-02    47.0        6.00        1.74    
TID2*  7.0    142.       -1.69        44.6        4.88        2.53    
TIXI   3.0    105.       -.698e-01    33.3        4.00        2.59    
TOUL   3.0    .616        155.        67.1        5.00        2.81    
TSKB*  7.0    1.34       -.630        56.4        4.45        3.11    
USNO   4.1    .           .           62.3        5.27        3.09    
USUD   6.0    271.       -1.34        50.2        4.00        3.08    
VESL   4.8    .288e+06    504.        38.6        4.45        2.43    
WTZR*  5.9    .618e-01    .480        68.7        4.85        2.91    
WUHN   2.0    9.71       -.119e+04    58.0        5.52        2.24    
XIAN   2.0    .841e+06    .177e+04    54.5        4.53        2.56    
YAR1*  5.8    94.7       -.509e-02    47.8        4.00        2.10    
YELL*  7.0    .140        .393        52.9        4.60        1.80    
PRN01  7.0    82.7        81.4        57.0        5.00        2.57    
PRN02  7.0    80.6       -50.3        63.7        5.00        2.14    
PRN03  7.0    81.4        114.        61.3        5.00        2.17    
PRN04  6.6    79.4        563.        67.6        5.00        1.98    
PRN05  7.0    80.2        196.        63.3        5.00        2.16    
PRN06  7.0    82.4        .256        60.7        5.00        2.24    
PRN07  5.7    .503e+05    550.        67.1        5.14        2.06    
PRN08  6.0    81.6        786.        63.0        5.00        2.03    
PRN09  7.0    81.6       -39.3        61.7        5.00        2.25    
PRN10  7.0    79.8        35.2        66.8        5.00        2.29    
PRN13  7.0    82.0       -124.        61.2        5.00        2.15    
PRN14  7.0    80.7        19.3        61.2        5.00        2.07    
PRN15  6.6    3.58        675.        63.9        5.00        2.04    
PRN16  7.0    80.7        112.        62.7        5.00        2.32    
PRN17  6.8    82.3       -209.        61.9        5.00        2.16    
PRN19  7.0    82.2       -1.34        59.9        4.86        2.27    
PRN21  7.0    82.8        15.0        61.6        5.00        2.33    
PRN22  7.0    79.4        359.        64.4        5.00        2.23    
PRN23  7.0    80.5        12.2        62.7        5.31        2.35    
PRN24  6.6    82.1        560.        65.0        5.00        2.30    
PRN25  7.0    82.4        .744        57.3        5.00        2.22    
PRN26  7.0    83.9        464.        62.3        5.00        2.17    
PRN27  4.0    82.4        17.8        63.8        5.00        1.94    
PRN29  7.0    81.8        403.        56.3        5.00        2.43    
PRN30  7.0    82.6       -15.4        61.3        5.00        1.95    
PRN31  7.0    81.6        17.1        59.9        5.00        2.25    
_______________________
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  4 18   99  4 19   99  4 20   99  4 21   99  4 22   99  4 23   99  4 24
prn   3d rss (cm)
  1     528        461        338        470        483        376        385   
  2     290        214        264        197        266        308        183   
  3     297        236        180        208        214        203        286   
  4     569        239        325        223        387        358        223   
  5     212        355        338        395        328        403        426   
  6     671        368        398        336        518        435        844   
  7     276        261        272                   185        314        244   
  8     304        268        270        201        176        214              
  9     361        248        225        203        228        215        288   
 10     350        196        403        296        285        249        257   
 13     180        285        266        211        199        298        273   
 14     608        770        925       1281        524        411        540   
 15     633        396        332        300        260        268        361   
 16    1248       1873        457        500        330        436        312   
 17     516        333        400        462        512        401        491   
 19     390        807        416        232        290        835       1717   
 21     447        192        180        281        328        304        413   
 22     343        364        424        399        362        470        674   
 23     446        447        365        388        739        499        334   
 24    1249        246        196        175        213        364        227   
 25     455        404        626        617        552        577        395   
 26     238        222        156        246        257        343        250   
 27     285        433        260        504                                    
 29     328        274        238        312        392        686        835   
 30     152        330        144        202        189        161        217   
 31     350        616        302        265        330        614        384   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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