Subject: [IGSREPORT-3860] Wk 0909 JPL Analysis Report
From: D C Jefferson
Date: Thu, 19 Jun 1997 16:54:51 PDT

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IGS Electronic Report    Thu Jun 19 16:54:51 PDT 1997      Message Number 3860
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Author: D C Jefferson
Subject: Wk 0909 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0909 (DAYS 159-165, DATES 1997 Jun 08 - Jun 14)
******************************************************************************

Submitted by the JPL IGS/FLINN Analysis Team:

J F Zumberge, D C Jefferson, M B Heflin, M M Watkins, F H Webb

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/0909.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09097.sum         This text file.
jpl09097.erp         Earth rotation parameters for GPS week 909.
jpl09097.snx         Ground station coordinates for GPS week 909, SINEX format.
jpl0909[0-6].sp3     GPS ephemerides for GPS week 909, sp3 format.
jpl0909[0-6].tro     Ground station troposphere estimates for GPS week 909.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 13.0 cm

According to the file nanu1997.mes obtained from the IGS CBIS, PRN04 was
unusable on day 162 for maintenance/repositioning.  Data from this satellite
did not meet our initial convergence criteria on this nor the following day
(163), and have been excluded from the analyses of both days.

Beginning this week we add a new candidate station, TOUL.  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)
TOUL (Toulouse, France)   4627848.6308    119629.4644   4373003.3012

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: FAIR (not ALGO) used as reference clock days 159, 160, and 162-165.
WARNING: PIE1 (not ALGO) used as reference clock days 161.
WARNING: Data from PRN04 excluded days 162 and 163 due to a maneuver.
WARNING: Data from GOPE, QUIN excluded day 161.
WARNING: Data from NYAL excluded day 163.

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 909 (1997 Jun 08 - Jun 14)
     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
50607.50  -6673  51991  -439579  1773    3    3     8      8 37 10 25  312  139 
50608.50  -6363  52033  -441343  1754    3    3     8      8 37 10 25  332  118 
50609.50  -5982  52077  -443065  1691    3    3     8      8 37 11 25  364  147 
50610.50  -5606  52186  -444773  1724    3    3     8      8 37 11 24  363  195 
50611.50  -5229  52313  -446475  1680    3    4     8      8 37 10 24  381  200 
50612.50  -4841  52505  -448123  1616    3    3     8      8 37 11 25  409  237 
50613.50  -4518  52663  -449687  1513    3    4     8      8 37 11 25  331  161 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 909:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 909 (1997 Jun 08 - Jun 14)
      97  6  8   97  6  9   97  6 10   97  6 11   97  6 12   97  6 13   97  6 14
prn   3d rss (cm)
  1      16         17         24         13         16         12         21   
  2       9         12          7         12         10         36         24   
  3      16         18         23         24         12         21         20   
  4      10          8          7                               13          8   
  5      25         20         15         16         22         19         23   
  6      14         29         12          8         12         12         21   
  7      11         15         12         20         12         15         24   
  9      23         27         27         12         13         20         14   
 10      10         15         10         16          9         18         12   
 14      12         13         16         22         16         10         11   
 15       7         15         13         11          6          8          9   
 16       8          9         10         10         10         10          9   
 17      24         19         12         14         17         13         26   
 18      10         14         12         16         17          8         10   
 19      12         15          7         18         17         15         12   
 21      18         11         13         14         15         24         17   
 22      13         12         17         11         10         14         18   
 23      22         24         17         14         19         24         11   
 24      16         18         36         19         14         14         11   
 25      13         12         11         16         13         11         16   
 26       9          7         10         14          8          7          6   
 27       8          9         10          9         14         10          9   
 29      10         11         13         20         20         30         77   
 30      50         18         16         12         10         27         26   
 31       9         10         12         15          9         15         12   
_______________________
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 909 (1997 Jun 08 - Jun 14)
 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    145.        .174        49.0        4.74        2.88    
ANKR   4.7    113.       -.274        56.0        4.62        2.76    
BAHR   7.0    .605e+05    157.        55.9        5.15        3.91    
BRUS   2.0    .263        .793        60.5        6.11        2.85    
CAS1   6.9    11.0        .307e+04    45.3        5.47        2.08    
CHAT   7.0    106.       -.258        77.1        5.30        2.63    
COCO   6.9    144.       -.370e+04    40.4        6.70        2.93    
CRO1   6.9    153.       -.268        51.1        5.19        2.00    
DGAR   6.9    104.       -.266        59.3        7.53        1.89    
FAIR*  6.9    .746        .205e-01    42.7        5.50        2.27    
FLIN   4.0    87.0       -.291        46.1        4.57        2.96    
FORT   7.0    .469e+05   -144.        48.5        5.75        3.27    
GODE   2.0    .487       -8.62        41.5        4.52        2.57    
GOL2*  7.0    .350       -.308        49.0        5.45        3.19    
GUAM   7.0    124.       -.266        84.9        8.37        2.34    
HART*  1.8    13.5        8.78          .         4.53        3.02    
HRAO   2.4    96.8       -.237        48.1        4.68        1.22    
IISC   7.0    84.0       -.262        70.8        6.54        2.50    
IRKT   5.9    .446       -.318        68.3        5.36        3.02    
KELY   1.0    87.4       -.240        40.0        6.00        1.43    
KERG   7.0    686.       -5.92          .         6.02        2.62    
KIT3   2.8    243.       -.223        56.4        5.34        2.88    
KOKB*  6.8    224.       -.227        74.3        6.44        1.83    
KOSG*  7.0    3.97       -13.7        44.3        4.91        2.46    
KWJ1   6.9    413.       -.277        59.1        9.22        1.72    
LHAS   6.9    792.       -.201        50.8        5.90        2.12    
MAC1   4.9    83.2       -.275        31.2        3.88        2.55    
MAD2   3.0    89.6       -.548        92.3        6.06        2.06    
MADR*  6.9    .456        .247          .         5.76        2.04    
MALI   2.9    22.6       -140.          .         9.31        2.26    
MAS1   3.9    107.       -.151e-01    43.8        4.52        2.25    
MCM4   7.0    87.6       -.260        32.3        4.46        2.19    
MKEA   4.0    .440       -.554        41.8        5.52        2.76    
MOIN   2.8    91.5       -.286        63.0        5.35        1.76    
NYAL   1.5    .350       -.311          .         5.60        1.94    
PERT   2.9    1.69       -1.39        58.4        6.73        2.78    
PIE1   3.0    .145       -.592e-01    54.0        5.00        2.56    
REYK   4.0    85.0       -.290        58.2        6.57        2.33    
SANT*  6.6    .131e+04    .654e-01    36.9        5.61        1.78    
STJO   4.0    3.57       -.123        39.0        4.77        3.04    
TAHI   7.0    122.       -.264        74.9        6.45        2.55    
THU1   5.8    92.0       -.266        45.7        5.19        2.68    
TID2*  6.9    14.9       -.227        38.2        5.45        2.97    
TOUL   2.0    .959       -.182        47.0        5.00        2.83    
USNO   1.0    .683       -.363        61.0        6.00        2.62    
USUD   7.0    4.73        .479        36.4        5.16        2.81    
WTZR*  2.8    604.       -1.91        60.2        5.37        2.65    
WUHN   4.9    .550e+06   -.285e+04    48.6        6.03        2.72    
YAR1*  7.0    3.21       -6.01          .         4.96        2.51    
YELL*  7.0    169.       -.743        44.3        4.73        1.68    
PRN01  6.9    81.4        21.3        53.3        5.86        2.21    
PRN02  6.5    79.2       -372.        59.0        5.60        2.14    
PRN03  6.9    80.8        21.9        55.0        6.16        2.47    
PRN04  4.7    80.8        31.3        52.6        5.63        2.10    
PRN05  6.5    82.0        99.4        56.6        5.31        2.27    
PRN06  6.8    78.7       -.307        53.0        5.59        2.54    
PRN07  6.9    82.4        747.        56.5        5.46        2.30    
PRN09  6.5    82.8       -11.3        55.1        5.75        2.28    
PRN10  6.8    79.8        8.84        54.3        5.45        2.49    
PRN14  6.8    80.2        19.1        56.8        5.74        2.29    
PRN15  6.9    2.98        435.        53.9        5.87        2.34    
PRN16  6.9    82.8        15.0        58.2        5.73        2.38    
PRN17  6.9    82.7       -151.        54.0        5.59        2.47    
PRN18  6.9    80.6        .672        49.7        5.46        2.38    
PRN19  6.8    82.3        21.0        52.9        5.60        2.21    
PRN21  6.9    82.3        59.5        55.1        5.86        2.38    
PRN22  6.6    84.1        396.        52.8        6.03        2.55    
PRN23  6.9    81.1        .185        52.9        5.73        2.43    
PRN24  6.9    81.7        557.        53.3        5.60        2.29    
PRN25  6.9    81.4       -5.71        50.7        5.73        2.43    
PRN26  6.8    81.3       -189.        53.3        5.60        2.75    
PRN27  6.9    82.5        31.3        52.2        5.73        2.44    
PRN29  6.8    79.0        85.7        57.3        6.70        2.69    
PRN30  6.5    80.8       -61.1        55.0        5.89        2.43    
PRN31  6.9    82.4        416.        52.9        6.00        2.54    
_______________________
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  6  8   97  6  9   97  6 10   97  6 11   97  6 12   97  6 13   97  6 14
prn   3d rss (cm)
  1     424        382        253        246        302        284        326   
  2     673        326        730        330        281        388        597   
  3     268        350        265        332        308        243        341   
  4     968        410        651                              366        443   
  5    1106        896        883        559        373        380        922   
  6     656        550        453        513        445        520        833   
  7     254        314        598        227        235        541        409   
  9     366        370        730        520        223        310        249   
 10     253        324        381        410        254        779        463   
 14     648        493        392       1150       1001        724        419   
 15     303        276        355        221        179        221        257   
 16     203        278        266        453        912        664       1158   
 17     258        299        440        378        270        247        301   
 18     428        376        233        502        687        469        704   
 19     240        336       1870        277        553        412        229   
 21     188        224        305        180        252        294        174   
 22     543        507        513        661        300        341        265   
 23     959       1574        735       1699       2045       1145       1157   
 24     578        265        334        397        444        386        399   
 25     488        310        456        525        482        311        403   
 26     133        168        150        219        557        243        324   
 27     204        259        404        429        419        274        260   
 29     303        278        300        285        209        219        506   
 30     554        803        600        468        530        364        206   
 31     326        655        569        630        608        494        270   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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