Subject: [IGSREPORT-6359] Wk 1021 JPL Analysis Report
From: D C Jefferson
Date: Tue, 17 Aug 1999 11:23:27 PDT

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IGS Electronic Report    Tue Aug 17 11:23:27 PDT 1999      Message Number 6359
******************************************************************************

Author: D C Jefferson
Subject: Wk 1021 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 1021 (DAYS 213-219, DATES 1999 Aug 01 - Aug 07)
******************************************************************************

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/1021.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl10217.sum         This text file.
jpl10217.erp         Earth rotation parameters for GPS week 1021.
jpl10217.snx         Ground station coordinates for GPS week 1021, SINEX format.
jpl1021[0-6].sp3     GPS ephemerides for GPS week 1021, sp3 format.
jpl1021[0-6].tro     Ground station troposphere estimates for GPS week 1021.
jpl1021[0-6].clk     GPS and ground station clocks for GPS week 1021, RINEX.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 11.0 cm

Beginning day 213, JPL rapid and final products submitted to the IGS
make use of ITRF97.  Monument coordinates and velocities are taken from
ftp://igscb.jpl.nasa.gov/igscb/station/general/ITRF97_IGS_RS51.SNX, and
antenna heights from ftp://igscb/igscb/station/general/igs.snx.  (Antenna
reference point to L1 and L2 phase centers are from ftp://igscb/igscb/station/
general/igs_01.pcv.)

As we use only 39 stations in our daily processing, we select a subset of the
51 sites designated by the IGS as fiducials in the following manner:

  a) Automatically include and constrain the following 20 sites when
     available: ALGO DAV1 FAIR FORT GOL2 HARK IRKT KERG KIT3 KOKB KWJ1
     MAC1 OHIG ONSA SANT TID2 TSKB WTZR YAR1 YELL.

     NOTE a1: For this week only, the coordinates and velocities for FAIR
              were inadvertently constrained to their ITRF96 values.
     NOTE a2: TID2 is used in place of the IGS fiducial TIDB.

  b) Allow the remaining 19 sites to be selected normally, based on
     geographic distribution.  With the exception of BAHR, BRAZ, and MALI,
     constrain any of these that are IGS fiducials to their ITRF97 values.

     NOTE b1: For this week only, the coordinates and velocities for MALI
              were inadvertently constrained, and constrained to their ITRF96
              values.
     NOTE b2: For this week only, AUCK, CHAT, and MCM4 were inadvertently
              not constrained as fiducials at all on days they participated
              in the global analysis.

The jpl.acn file at the IGS CBIS has been updated to reflect the switch to
the new reference frame.  Please note that orbits, Earth orientation, SINEX
station coordinates, and daily transformation files submitted to the IGS are
still all free-network solutions, but are now aligned with ITRF97.

A large clock discontinuity (reset) of about 477 microseconds was detected
for PRN04 at approximately 23:45 on day 217.

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 COCO, KIRU excluded day 213.
WARNING: Data from COCO, QUIN excluded day 214.
WARNING: Data from COCO, SUWN excluded day 215.
WARNING: Data from COCO, TROM excluded day 216.
WARNING: Data from COCO, OAT2 excluded day 217.
WARNING: Data from COCO excluded day 218.
WARNING: Data from NYAL excluded day 219.

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 1021 (1999 Aug 01 - Aug 07)
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
51391.50  -21252  339325   4920750   4360  42  43  132  132 39  0 27   462  1364
51392.50  -20281  340154   4916157   4825  47  48  139  139 39  0 27  1177   817
51393.50  -19153  341238   4911102   5286  41  43  124  124 39  0 27   853   722
51394.50  -17943  341987   4905668   5581  47  48  111  111 39  0 27  1043   884
51395.50  -16333  342863   4900419   4918  45  45  111  111 39  0 27  1503   933
51396.50  -15261  344048   4895634   4652  46  50  128  128 39  0 27   566  1092
51397.50  -14442  345210   4891306   4003  45  46  139  139 39  0 27   901  1471
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 1021:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE               GPS week 1021 (1999 Aug 01 - Aug 07)
      99  8  1   99  8  2   99  8  3   99  8  4   99  8  5   99  8  6   99  8  7
prn   3d rss (cm)
  1      15         11         18         15          6          8         14   
  2       9          8          7          7          6         10         10   
  3      13         13         23         18         10         20         18   
  4       7          6          6          7          7         17          8   
  5       6         10         12          9         10          5         11   
  6      18         13          8         10         10          6          7   
  7       6         10          5          6          6          7         10   
  8       6          6         11          8          6          5          7   
  9       8         13         13         11         12         13         13   
 10      10         12         10         13         12         11         10   
 13      14         14         13         16         10         12         14   
 14      10         13         16         11         17         22         17   
 15      22         36         39          9          8         11         14   
 16      13         12          8          6          9          8          9   
 17      20         21         28         24         22         18         25   
 18      11         10          7          7         14         18         11   
 19      11         11         18          6          8         12          9   
 21       8          6         12          7          9          8          9   
 22      14         13         11         11          6         11          7   
 23      23         14         17         15         20         18         25   
 24      13         14          6         12         10         11         14   
 25      13         10         13         13         12         10          9   
 26      14          9         14         19         16          9          9   
 27       9          8          7          6          7          9          8   
 29      15         15         21         14         21         19         28   
 30      12          9         18         11         12          6          9   
 31      14         10         15         11          7          9         13   
_______________________
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 1021 (1999 Aug 01 - Aug 07)
 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    .780e-01   -.847        86.2        5.15        2.61    
ASC1   6.7    122.       -.163e-01    76.0        5.45        1.61    
AUCK*  1.9    83.5       -.302e-02    50.5        5.55        2.93    
BAHR   7.0    .563        910.        40.5        5.31        2.98    
BARB   3.5    103.       -.888e-01    43.2        6.80        3.64    
BOGT    .8    .516e+05    1.19        96.0        5.00        1.33    
CHAT*  3.0    101.       -.624e-02    83.3        5.35        2.43    
CRO1   1.8    .294e+04    .701e-01    66.0        5.52        1.85    
DAV1*  5.7    133.        .124e-01      .         5.00        1.38    
DGAR   6.2    114.       -.381e-01    75.2        5.06        1.64    
EISL   7.0    135.       -.185e-01    68.0        5.00        2.82    
FAIR*  2.9    594.        .455        33.7        6.00        1.87    
FORT*  7.0    .164        .928e-01    80.7        4.87        1.87    
GOL2*  6.9    5.81        2.20        72.8        4.60        2.32    
GUAM*  7.0    129.       -.614e-01    84.8        6.32        1.99    
HARK*  7.0    .287e+06    503.        57.6        4.74        3.10    
HOB2*  6.9    .101e+04   -9.41        47.7        5.03        2.79    
HOLB   1.0    121.        80.6        60.0        5.00        3.29    
HRAO   3.9    42.0       -.533e-02    45.1        4.00        2.61    
IISC   6.9    99.5       -.512e-01    79.0        5.16        2.14    
IRKT*  5.9    .191        315.        74.1        5.36        2.45    
KELY   3.4    .183e+04   -.284          .         5.72        1.39    
KERG*  7.0    .289e+06    501.          .         5.00        2.92    
KIT3*  2.8    404.       -.686e-01    79.0        5.07        2.49    
KOKB*  7.0    396.       -1.43        74.0        7.02        3.63    
KUNM   6.0    130.       -.350e-01    76.1        5.18        2.54    
KWJ1*  6.9    109.       -.387e-01    82.4        5.91        1.56    
LHAS*   .8    105.       -.371e-01    82.0        5.00        2.27    
MAC1*  3.9    92.7       -.339e-02    42.5        4.27        2.30    
MAD2   2.0    .720e-01    .176        86.5        6.52        2.37    
MAG0   4.8    .289e+06    485.        32.2        4.83        1.71    
MALI   6.6    19.0       -89.8        90.3        7.17        1.83    
MCM4*  6.8    128.        .147e-02    51.2        4.73        1.19    
MKEA   6.0    41.2        .478e-01    72.1        4.37        2.44    
NOUM   2.0    .289e+06    487.        78.5        5.00        1.89    
NTUS   2.9    98.1       -.660e-01    95.2        6.00        1.46    
NYA1   7.0    .126       -.675e-01    49.8        5.30        1.96    
ONSA*  7.0    34.8       -.537e-01    45.0        4.31        2.82    
PIMO   1.0    129.       -.337e-01    70.0        8.00        2.03    
POL2   4.0    134.       -.404e-02    73.4        4.27        2.68    
RIOG   6.0    .289e+06    475.        31.2        4.18        3.15    
SANT*  7.0    93.3        .672        56.4        4.75        2.59    
SFER   4.8    .725        151.        80.0        4.65        2.68    
SYOG    .8    .865       -1.07        40.0        5.00        1.79    
THTI   7.0    .289e+06    501.        80.8        5.00        2.50    
TID2*  7.0    .971e-01    1.12        46.3        4.73        2.48    
TIXI   1.0    102.       -.855e-01    32.0        5.00        2.78    
TSKB*  7.0    219.        .217        68.5        5.48        2.91    
USNO   7.7    .           .           68.8        5.89        2.73    
USUD   5.9    54.6       -.875        52.6        6.20        2.76    
WTZR*  5.8    3.57        1.81        55.7        6.00        3.04    
YAKZ   1.0    76.4       -.834e-01    40.0        5.00        2.70    
YAR1*  7.0    86.1        .379e-02    46.2        4.00        2.17    
YELL*  4.8    .129        .208        75.3        5.22        1.77    
PRN01  6.8    81.8        93.5        63.5        5.31        2.47    
PRN02  7.0    79.5       -93.3        66.9        5.00        2.37    
PRN03  7.0    84.5        28.7        66.4        5.15        2.37    
PRN04  6.7    .402e+05    379.        63.4        5.17        2.19    
PRN05  7.0    82.5        211.        67.9        5.00        2.51    
PRN06  6.8    83.4       -.418e-01    68.0        5.30        2.14    
PRN07  7.0    78.8        576.        63.5        5.00        2.23    
PRN08  7.0    80.0        25.9        69.2        5.31        2.09    
PRN09  7.0    83.0       -4.73        65.2        5.00        2.22    
PRN10  7.0    82.7        39.2        65.3        5.00        1.99    
PRN13  7.0    79.3       -68.1        65.8        5.31        2.22    
PRN14  7.0    81.9        28.6        60.9        5.30        2.26    
PRN15  7.0    3.07        711.        67.6        5.00        2.10    
PRN16  7.0    81.2        129.        64.9        5.00        2.42    
PRN17  7.0    80.7       -218.        69.3        5.31        2.04    
PRN18  6.8    79.3        25.8        63.6        5.30        2.23    
PRN19  7.0    82.5        24.2        64.9        5.00        2.31    
PRN21  6.9    79.4        26.3        66.0        5.00        1.94    
PRN22  7.0    79.4        430.        69.4        5.00        2.51    
PRN23  7.0    78.6        3.44        67.7        5.74        2.34    
PRN24  7.0    81.7        590.        60.8        5.00        2.58    
PRN25  7.0    79.8        1.93        65.8        5.00        2.56    
PRN26  6.6    83.0        662.        65.6        5.46        2.04    
PRN27  7.0    80.3        27.9        66.8        5.00        2.30    
PRN29  6.7    81.3        521.        62.3        5.87        2.36    
PRN30  7.0    79.9       -27.2        66.2        5.00        2.51    
PRN31  7.0    83.6        22.7        63.0        5.00        2.39    
_______________________
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  8  1   99  8  2   99  8  3   99  8  4   99  8  5   99  8  6   99  8  7
prn   3d rss (cm)
  1     512        400        444        493        605        635        505   
  2     544        316        177        220        345        497        368   
  3     206        399        232        253        213        174        198   
  4     536        294        217        252        305        374        580   
  5     425        645        392        280        341        225        246   
  6     946        599        550        491        702        765       1033   
  7     347        435        219        447        703        457        414   
  8     317        307        290        303        498        416        322   
  9     174        211        258        191        243        314        281   
 10     329        272        258        395        728        607        616   
 13     139        418        221        283        387        421        663   
 14     342       1301        799        577       1427        786        435   
 15     223        308       1566        659        304        374        407   
 16     693        754        482        467        523        478        594   
 17     251        278        238        584        303        293        438   
 18     653        597        720        862        846        829        733   
 19     289        217        352        379        307        277        267   
 21     937        257        381        286        194        478        515   
 22     162        368        315        284        214        193        412   
 23     560        645        660        404        549        501        585   
 24     410        571        512        460        330        345        280   
 25     198        334        582        659        334        330       1065   
 26     242        284        230        240        553        596        788   
 27     288        344        222        209        299        287        276   
 29     335        452        467        347        310        247        275   
 30     120        125        264        330        290        165        182   
 31     896        587        334        397        289        260        312   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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