Subject: [IGSREPORT-3482] Wk 0892 JPL Analysis Report
From: D C Jefferson
Date: Mon, 24 Feb 1997 16:13:57 PST

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IGS Electronic Report    Mon Feb 24 16:13:57 PST 1997      Message Number 3482
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Author: D C Jefferson
Subject: Wk 0892 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0892 (DAYS 40-46, DATES 1997 Feb 09 - Feb 15)
******************************************************************************

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/0892.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl08927.sum         This text file.
jpl08927.erp         Earth rotation parameters for GPS week 892.
jpl08927.snx         Ground station coordinates for GPS week 892, SINEX format.
jpl0892[0-6].sp3     GPS ephemerides for GPS week 892, sp3 format.
jpl0892[0-6].tro     Ground station troposphere estimates for GPS week 892.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 12.0 cm

REPORT UPDATE
-------------
Beginning this week, both of our orbit comparison tables use centimeters
(instead of meters) in reporting overlap statistics.

GENERAL
-------
According to the file nanu1997.mes obtained from the IGS CBIS, PRN27 was
unusable on day 045 for maintenance/repositioning.  Data from this satellite
did not meet our initial convergence criteria on this nor the following day
(046) and have been excluded from these days' analyses.

A clock reset of about 43 microseconds was detected for PRN16 at approximately
11:40 UT on day 041.

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 ALGO) used as reference clock days 045 and 046.
WARNING: Data from PRN23 excluded days 045 and 046 due to a manuever.
WARNING: Data from QUIN, ROCK excluded day 040.
WARNING: Data from COSO, XIAN excluded day 041.
WARNING: Data from LPGS excluded day 042.
WARNING: Data from KELY excluded day 044.
WARNING: Data from DAM1 excluded day 045.
WARNING: Data from KELY, LHAS, LPGS, SANT excluded day 046.

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 892 (1997 Feb 09 - Feb 15)
     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
50488.50 -13110  16586  -177773  1435    2    3     7      7 37 12 25 -185  263 
50489.50 -13300  16867  -179263  1544    2    3     7      7 37 12 25 -188  259 
50490.50 -13501  17163  -180864  1659    2    3     7      7 37 12 25 -197  259 
50491.50 -13721  17425  -182546  1705    3    3     8      8 37 11 25 -236  255 
50492.50 -13940  17677  -184240  1683    3    3     8      8 37 11 25 -185  253 
50493.50 -14130  17955  -185927  1690    3    3     7      7 37 11 24 -199  289 
50494.50 -14353  18267  -187677  1810    3    4     8      8 37 10 24 -225  241 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 892:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 892 (1997 Feb 09 - Feb 15)
      97  2  9   97  2 10   97  2 11   97  2 12   97  2 13   97  2 14   97  2 15
prn   3d rss (cm)
  1      10          8          6          8          8         12         10   
  2       7          9          6          9          6         14         22   
  3      17         16         14         13         13         15         33   
  4      17         18         13         11         15         12         17   
  5       8         12          8          9          5          9          6   
  6       9         12         10          9         12         12         14   
  7       7          8         12          7          6         17         16   
  9      10         15          8          7         11         13         12   
 10      16         15         20         14          8         14         23   
 14      18         24         15          7          8          9         19   
 15       8          7          7         10          9         18         13   
 16      27         19         13         11         16         16          9   
 17      18         15          8          9          8         24         11   
 18      17          8         12         16         25         16         38   
 19       9         10          8         10         15         18         14   
 21      12         15          7          5          8         18          9   
 22      15         14         11         14         16         20         13   
 23      16         19         10         11         10         10          9   
 24      12         16         10         11         16         24         12   
 25      18         16          8         20         12          6          7   
 26      10         10          9         14         12         15         16   
 27       8          8          8          8          6                         
 29       7         16          7         14          9         27         20   
 30       8         12         10          6          5          7         10   
 31       8         10         11         15         11         20         21   
_______________________
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 892 (1997 Feb 09 - Feb 15)
 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*  7.1    187.        .390        32.1        3.87        3.40    
ANKR   3.8    142.       -.570        47.0        3.76        3.28    
AREQ   2.0    86.4       -.321        19.5        5.50        3.49    
ASC1   7.0    118.       -.449        56.9        5.61        2.58    
BAHR   6.7    .617        264.        33.0        4.75        3.40    
BOGT    .8    95.9       -.146        49.0        6.00        2.91    
BRAZ   1.0    74.2       -.484        42.0        6.00        3.64    
BRUS   7.0    235.       -.846        47.6        4.00        3.13    
CAS1   3.9    .357e+05    189.        19.7        4.27        1.55    
CHAT   7.0    79.6       -.453        69.1        5.34        3.07    
COCO   6.9    157.       -535.        44.2        7.17        2.91    
CRO1   6.0    105.       -.498        23.7        6.11        2.83    
DAV1   2.0    52.3        628.        21.0        4.53        1.95    
DGAR   7.0    82.8       -.453        29.8        7.60        3.49    
FAIR*  7.0    .124       -.786e-01    21.0        4.00        2.34    
FORT   5.9    .217       -.800        32.3        8.04        3.31    
GOL2*  6.9    31.2       -.540        39.3        4.00        2.79    
GUAM   7.0    90.4       -.445        36.8        8.15        3.16    
HART*  2.9    20.7       -2.03        27.3        6.02        3.45    
IISC   5.3    70.9       -.445        56.7        5.16        2.98    
IRKT   5.9    .242        .104        40.4        4.41        3.35    
KELY    .8    78.4       -.607        26.0        5.00        1.89    
KERG   2.9    103.        3.84          .         6.00        3.14    
KIT3   4.0    105.       -.371        40.8        4.53        3.39    
KOKB*  6.7    136.       -.674        37.7        5.62        2.87    
KOSG*  7.0    11.3       -7.89        29.7        3.16        2.54    
KWJ1   6.9    126.       -.452        41.5        8.30        2.84    
LHAS   5.7    .649e+04   -.172        45.3        4.56        2.62    
MAC1   4.4    79.3       -.390        17.2        4.26        2.42    
MADR*  7.0    .235e+04    14.2          .         7.18        2.36    
MALI   5.9    .351e+05   -131.          .         6.00        3.85    
MAS1   7.0    109.       -.806        14.0        4.45        2.90    
MCM4   6.0    89.7       -.440        23.1        3.70        1.57    
MKEA   5.0    .117       -.918        26.2        6.42        3.19    
MOIN   2.7    100.       -.586        50.1        6.63        3.58    
NYAL   1.0    .721e-01   -.928          .         4.00        2.42    
OHIG   5.9    .796e+06    41.5        49.3        4.47        1.21    
PAMA   2.9    124.       -.516          .         13.3        2.70    
PERT   7.0    2.36       -6.11        37.7        4.46        3.50    
PIE1   1.8    .           .           24.0        4.00        3.23    
RCM6   1.0    73.7       -.155        43.0        5.00        3.09    
REYK   2.0    73.2       -.162        48.5        5.53        2.34    
SANT*  5.3    759.       -.464        31.7        4.88        1.59    
THU1   5.9    68.9       -.413        33.2        4.53        2.65    
TID2*  6.9    23.1       -.433        28.0        6.03        3.22    
USUD   6.9    628.        3.77        22.2        4.04        3.43    
WTZR*  6.9    97.4       -.386        47.1        4.00        2.93    
WUHN   2.7    3.79       -12.4        30.3        4.00        3.49    
YAR1*  6.9    14.7       -.572          .         3.88        3.25    
YELL*  7.0    41.6       -.204        44.3        3.88        1.50    
PRN01  7.0    81.2        12.7        40.3        5.59        2.50    
PRN02  7.0    79.0       -336.        37.9        5.60        3.03    
PRN03  6.6    81.0        98.5        39.7        5.86        2.60    
PRN04  7.0    83.1        12.3        36.5        5.63        2.47    
PRN05  7.0    82.0        81.8        36.9        5.31        3.05    
PRN06  6.8    81.7        3.84        37.0        5.31        2.74    
PRN07  6.8    81.2        738.        39.8        5.73        2.51    
PRN09  7.0    83.1       -28.1        39.2        5.30        3.09    
PRN10  7.0    82.5        3.47        38.0        5.63        2.49    
PRN14  7.0    82.0        16.7        37.7        5.31        2.63    
PRN15  7.0    2.75        391.        42.3        5.16        2.84    
PRN16  6.9    .320e+04    12.2        38.9        5.46        2.65    
PRN17  7.0    80.3       -140.        36.0        5.15        2.70    
PRN18  6.9    81.7        22.1        38.6        5.61        2.44    
PRN19  7.0    81.4        250.        37.6        5.15        2.64    
PRN21  7.0    81.4        31.2        39.3        5.73        2.69    
PRN22  7.0    81.8        370.        36.9        5.88        2.51    
PRN23  7.0    79.8        9.04        39.1        5.58        2.54    
PRN24  7.0    79.7        252.        35.9        5.62        2.65    
PRN25  7.0    81.3       -5.38        35.3        5.15        2.41    
PRN26  7.0    80.1       -119.        39.0        6.18        2.85    
PRN27  5.0    80.9        17.7        35.4        5.22        2.63    
PRN29  7.0    80.9        6.08        35.9        5.16        2.92    
PRN30  7.0    80.0       -35.4        39.7        5.30        2.72    
PRN31  6.6    81.9        211.        38.3        6.05        2.53    
_______________________
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  2  9   97  2 10   97  2 11   97  2 12   97  2 13   97  2 14   97  2 15
prn   3d rss (cm)
  1     700        648        571        563        626        691        705   
  2     360        440        420        414        395        443        396   
  3     492        656        579        614        576        594        623   
  4     426        326        291        283        323        448        284   
  5     351        366        356        287        336        328        309   
  6     692        757        689        650        701        722        741   
  7     687        762        746        731        737        777        869   
  9     210        218        343        363        287        342        455   
 10     689        682        587        682        487        451        464   
 14     703       1600       1424        294        819        562        669   
 15     544        330        361        412        364        383        452   
 16     283       2388       1095        959        399        416        316   
 17     518        449        534        672        486        435        556   
 18     438        834        609        585        514        532        655   
 19     232        848        280        228        200        224        285   
 21     528        725        620        523        601        626        364   
 22     460        357        612        473        433        368        749   
 23     418        523        477        592        955       1031        622   
 24     705        600        484        471        486        517        527   
 25     383        343        387        367        368        353        412   
 26     218        228        267        349        194        366        236   
 27     194        337        328        449        360                         
 29     279        259        342        289        255        315        326   
 30     264        483        150        274        508        504        216   
 31     608        437        371        513        679        536        439   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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