Subject: [IGSREPORT-4255] Wk 0926 JPL Analysis Report
From: D C Jefferson
Date: Tue, 21 Oct 1997 10:08:32 PDT

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IGS Electronic Report    Tue Oct 21 10:08:32 PDT 1997      Message Number 4255
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Author: D C Jefferson
Subject: Wk 0926 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0926 (DAYS 278-284, DATES 1997 Oct 05 - Oct 11)
******************************************************************************

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 (128.149.70.41),
directory pub/jpligsac/0926.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09267.sum         This text file.
jpl09267.erp         Earth rotation parameters for GPS week 926.
jpl09267.snx         Ground station coordinates for GPS week 926, SINEX format.
jpl0926[0-6].sp3     GPS ephemerides for GPS week 926, sp3 format.
jpl0926[0-6].tro     Ground station troposphere estimates for GPS week 926.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 11.0 cm

We continue to deweight data from PRN13, and we have excluded its solution
from all of the orbit products for this week.  Additionally, PRN29 and PRN03
exhibited atypically high overlaps on days 278 and 283 respectively.  We have
chosen to remove these satellites from the corresponding day's analysis.

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 PRN29, ANKR, CLAR, TAHI excluded day 278.
WARNING: Data from ANKR excluded day 279.
WARNING: Data from ROCK, SANT, SCH2, SNI1 excluded day 281.
WARNING: Data from BLYT, IISC, LONG excluded day 282.
WARNING: Data from PRN03, MEDI, WTZR, ZWEN excluded day 283.
WARNING: Data from ALBH excluded day 284.

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 926 (1997 Oct 05 - Oct 11)
     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
50726.50  22217  36593   379640  2099    3    4     9      9 37 11 25   52 -276 
50727.50  22246  36318   377524  2134    3    3     9      9 37 11 26   53 -270 
50728.50  22257  36108   375380  2154    3    3     9      9 37 11 26   32 -284 
50729.50  22254  35842   373192  2221    4    4     9      9 37  9 26   51 -277 
50730.50  22250  35655   370987  2189    3    3     9      9 37 11 26   46 -247 
50731.50  22204  35411   368814  2157    3    4    11     11 37 10 25   52 -269 
50732.50  22264  35146   366647  2177    3    4     9      9 37 11 26  107 -302 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 926:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 926 (1997 Oct 05 - Oct 11)
      97 10  5   97 10  6   97 10  7   97 10  8   97 10  9   97 10 10   97 10 11
prn   3d rss (cm)
  1      15         24          8         19         13         13          7   
  2       8          5          8          7         13          9          7   
  3      26         21         18         17         22                    24   
  4       6          7          4          6         12          9          9   
  5       7          8          5          5          6          7          5   
  6       7          8          8          4         12         12          8   
  7      13         11          8          8         11         11         10   
  9      11         16         20         13         13          9          8   
 10       6          6         10         11          6          7          9   
 13      35         33         38         38         35         36         34   
 14      26         11         11         19         16         28         19   
 15      11         38         18         16         15         28         20   
 16      16          7         10         13         10         17         15   
 17      10         11          9         20         12         30         20   
 18      35          4          8         12         17         11         23   
 19      12         10         10          8         12         13         17   
 21      12         16         10         15         16         23         13   
 22       8         14          9          7         10         11         14   
 23      11         29         21         22         22         19         23   
 24       7          6          8          6          8          5          7   
 25       9         14         12          7         12         12         11   
 26      23         22         13         11         16         13         10   
 27       9          7          9          6         12          9          9   
 29                  4          8          8         10          7          7   
 30      10          7          6          5         10          8          6   
 31      14         14         18         10         17         18         19   
_______________________
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 926 (1997 Oct 05 - Oct 11)
 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    .           .           48.4        4.91        2.84    
ANKR   1.9    194.       -.771        51.5        4.00        3.15    
AREQ   2.0    99.9       -.488        55.0        4.00        2.09    
ASC1   6.8    969.       -.630        69.3        4.73        1.77    
BAHR   6.7    .704        742.        58.2        5.13        3.23    
CAS1   6.8    .391e+05    227.        62.6        6.00        1.45    
CHAT   7.0    102.       -.624        79.0        5.30        2.39    
COCO   6.9    99.0       -.122e+04    44.5        5.79        2.76    
CRO1   6.9    .124e+04   -.621        52.7        5.00        1.99    
DGAR   1.4    407.       -.660        66.8        6.62        1.46    
FAIR*  7.0    .222       -.581        36.8        5.02        1.96    
FLIN   3.0    103.       -.659        52.1        4.66        1.94    
FORT   7.0    18.9       -.635        69.4        5.44        1.59    
GOL2*  7.0    .187        .287        48.7        4.60        1.99    
GUAM   6.9    134.       -.636        63.9        7.16        2.09    
HKLO   1.0    .289e+06    498.        55.0        6.00        2.72    
IISC   2.9    96.4       -.704        77.2        6.95        2.34    
IRKT   7.0    .408e+04    84.5        56.5        4.60        2.23    
KELY    .8    .139e+06    34.7        35.0        5.00        1.84    
KERG   5.8    .213e+04    781.          .         5.00        2.37    
KIRU   1.0    2.62       -.856e-01    57.0        6.00        2.74    
KIT3   4.7    206.       -.599        68.7        4.62        2.88    
KOKB*  6.2    148.       -.552        86.4        6.29        1.75    
KOSG*  7.0    1.54       -19.6        43.5        5.35        2.51    
KOUR    .5    3.45       -.621          .         5.00        1.62    
KWJ1   7.0    112.       -.622        68.1        6.60        1.71    
LHAS   7.0    103.       -.617        59.3        4.75        2.31    
LPGS   1.0    312.       -.564        60.0        5.00        2.03    
MAC1   5.8    80.9       -.669        35.6        4.00        2.06    
MAD2   1.0    635.        1.16        96.0        6.00        1.98    
MADR*  7.0    .232       -1.10          .         6.18        2.43    
MALI   7.0    .400e+04   -21.0          .         7.30        2.02    
MAS1   1.0    2.06       -.266e-01    47.0        4.00        2.37    
MCM4   6.9    101.       -.613        39.0        5.00        1.31    
MDVO   3.9    .105e+06    411.        70.5        6.80        2.06    
MKEA   6.0    .149       -.830        57.0        5.35        2.55    
NICO   2.0    86.1       -.399        33.0        5.52        2.47    
NOTO   1.0    .108       -1.61        38.0        8.00        2.90    
PERT   5.0    .171e+04   -6.52        56.7        5.49        2.75    
POL2   2.0    87.0       -.658        47.2        3.53        2.55    
REYK   6.0    77.7       -.667        59.9        6.18        1.62    
SANT*  5.6    609.       -.556        45.5        4.43        1.58    
SFER   4.9    .620        11.4        71.7        5.81        3.06    
SHAO   1.8    96.6       -.808        66.5        4.00        2.07    
STJO   5.0    409.        1.28        39.6        4.22        2.90    
TAEJ    .9    .290e+06    489.        42.0        6.00        2.75    
TAHI   4.7    125.       -.734        81.4        5.80        2.40    
THU1   6.0    81.9       -.670        47.0        6.18        2.13    
TID2*  7.0    9.31       -.526        39.3        5.16        2.86    
TSKB   1.0    1.94       -.944        49.0        5.00        2.95    
USUD   3.0    4.37        1.32        41.4        5.40        2.66    
WTZR*  5.4    119.        1.72        61.3        5.00        2.70    
WUHN   3.9    .100e+05   -33.0        50.7        5.26        2.91    
YAR1*  5.7    85.5       -.613        37.4        4.18        2.09    
YELL*  7.0    2.83       -1.16        41.2        4.86        1.65    
PRN01  6.9    80.5        29.4        57.3        5.45        2.04    
PRN02  6.9    80.4       -411.        60.3        5.00        2.41    
PRN03  5.9    80.5        59.1        58.2        5.00        2.14    
PRN04  6.9    78.6        50.1        57.7        5.87        2.03    
PRN05  6.9    80.9        116.        54.5        5.31        2.25    
PRN06  6.9    80.4       -.976        55.8        5.30        2.34    
PRN07  6.9    82.2        756.        53.9        5.62        2.09    
PRN09  6.5    80.4       -14.6        56.7        5.45        2.01    
PRN10  6.9    79.6        13.1        57.0        5.87        2.05    
PRN14  6.8    82.7        22.2        54.5        5.31        2.34    
PRN15  6.9    3.13        476.        60.9        5.16        2.04    
PRN16  6.9    82.1        30.3        58.0        5.44        2.57    
PRN17  6.9    81.4       -162.        59.3        5.00        2.01    
PRN18  6.9    82.5        4.86        53.2        5.59        2.29    
PRN19  6.7    80.7        256.        53.9        5.00        2.39    
PRN21  6.9    79.7        84.9        58.7        5.69        2.19    
PRN22  6.9    81.7        21.2        55.7        5.15        2.22    
PRN23  6.9    82.5        3.99        58.2        5.31        2.28    
PRN24  6.9    80.6        774.        58.4        5.44        2.20    
PRN25  6.6    82.8       -6.81        54.0        5.60        1.98    
PRN26  6.9    81.4       -25.6        55.7        5.16        2.27    
PRN27  6.7    78.8        2.74        54.6        5.00        2.34    
PRN29  5.9    81.9        264.        52.5        5.00        2.29    
PRN30  6.8    80.0       -3.54        54.8        5.00        2.42    
PRN31  6.9    82.9       -1.05        56.9        5.30        2.16    
_______________________
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 10  5   97 10  6   97 10  7   97 10  8   97 10  9   97 10 10   97 10 11
prn   3d rss (cm)
  1     494        380        327        245        346        405        276   
  2     222        242        307        541        372        175        245   
  3     298        247        210        384        281                   239   
  4     315        404        284        327        354        390        438   
  5     239        264        350        384        295        446        303   
  6     431        553        826        538        440        451        407   
  7     385        449        342        496        572        350        331   
  9     216        259        402        253        305        478        523   
 10     323        304        268        311        403        539        274   
 13    1728       2471       3372       4432       5680       7110       8754   
 14     349        269        508        340        358        617        366   
 15     477        246        460        295        164        238        256   
 16     569        354        557        410        271        415        544   
 17     473        165        220        508        288        338        417   
 18     628        576        460        639        506        273        453   
 19     432        495        311        761        794        405        361   
 21     218        230        251        233        142        216        187   
 22     268        668        622        646        576        453        433   
 23     399        737        378        363        281        513        255   
 24     391        578        548        476        583        327        527   
 25     519        313        322        792        369        360        590   
 26     183        202        186        215        216        191        203   
 27     519        606        305        389        309        340        492   
 29               1784        454        535        301        452        340   
 30     382        288        433        238        344        266        585   
 31     220        172        220        273        359        229        380   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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