Subject: [IGSREPORT-4773] Wk 0950 JPL Analysis Report
From: D C Jefferson
Date: Tue, 7 Apr 1998 9:40:41 PDT

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IGS Electronic Report    Tue Apr  7  9:40:41 PDT 1998      Message Number 4773
******************************************************************************

Author: D C Jefferson
Subject: Wk 0950 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0950 (DAYS 81-87, DATES 1998 Mar 22 - Mar 28)
******************************************************************************

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/0950.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09507.sum         This text file.
jpl09507.erp         Earth rotation parameters for GPS week 950.
jpl09507.snx         Ground station coordinates for GPS week 950, SINEX format.
jpl0950[0-6].sp3     GPS ephemerides for GPS week 950, sp3 format.
jpl0950[0-6].tro     Ground station troposphere estimates for GPS week 950.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 10.5 cm

We continue to deweight all data from PRN08 and PRN13.  Data from PRN08 were
found to be extremely mismodeled on day 086, and we have chosen to exclude
them completely from this day's analysis.

According to the file nanu1998.mes obtained from the IGS CBIS, PRN06 was
unusable on day 082, and we have excluded its data on this day accordingly.
Data from this satellite were also mismodeled on the previous day (081), and
we have chosen to deweight these data for this day's analysis.  Lastly, data
from PRN26 were mismodeled on day 086 and have been excluded accordingly.

A large clock discontinuity (reset) of about 53 microseconds was detected for
PRN22 at approximately 15:40 on day 083.

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: TID2 (not NRC1) used as reference clock day 084.
WARNING: MKEA (not NRC1) used as reference clock day 085.
WARNING: USNO (not NRC1) used as reference clock day 086.
WARNING: Data from PRN13 deweighted the entire GPS week 950.
WARNING: Data from PRN06 deweighted day 081, excluded day 082.
WARNING: Data from PRN08 deweighted days 081-085 and 087; excluded day 086.
WARNING: Data from PRN26 excluded day 086.
WARNING: Data from HARK, HRAO, KERG excluded day 081.
WARNING: Data from MADR, SIO3 excluded day 083.
WARNING: Data from KSTU, SIO3 excluded day 084.
WARNING: Data from KSTU, SIO3 excluded day 085.
WARNING: Data from IRKT, KSTU, LPGS excluded day 086.

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 950 (1998 Mar 22 - Mar 28)
     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
50894.50  -9552  23350    50315  2040    3    3    11     11 37 22 27 -222  117 
50895.50  -9715  23473    48298  1994    3    3    11     11 37 23 26 -152  117 
50896.50  -9831  23612    46310  1981    3    3    11     11 37 22 27 -151  193 
50897.50  -9969  23794    44315  2009    3    3    10     10 37 26 27 -161  191 
50898.50 -10119  23991    42267  2088    3    3    11     11 37 25 27 -144  197 
50899.50 -10248  24180    40220  2005    3    3    11     11 37 27 25 -180  176 
50900.50 -10460  24383    38221  1994    3    3    11     11 37 21 27 -187  207 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 950:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 950 (1998 Mar 22 - Mar 28)
      98  3 22   98  3 23   98  3 24   98  3 25   98  3 26   98  3 27   98  3 28
prn   3d rss (cm)
  1       9         10          9         12         13         15          4   
  2      25         12         10         22         27         25         14   
  3       7          8         15         19         14          8         12   
  4      10          6          8          6          8         10         11   
  5       4          8          7         12          8         13         14   
  6     402                    13         14         28         14         13   
  7       5         10          7          9          7          6          8   
  8      68         76         72         84         90                   147   
  9       6         13         10         22          7         13          8   
 10      10          7          8          8         11         12         11   
 13      50         84        111         74         64         65         57   
 14       7         13         12         13          7         11         22   
 15       5         10          6         17         14         14          9   
 16       8          7         11         10         10          9         18   
 17       5          9         14          5         10         10         11   
 18       8          7          4          5          7         10         15   
 19      14          9          9         17         27         28         22   
 21      14         27         33          9         11         18         14   
 22       9         12          9          7         19         10         13   
 23      17         16         19         18         18         21         18   
 24       9          6         11         10          9         10         10   
 25       7          6          8          9         16         14          6   
 26      18         18          6          6          4                    42   
 27       7          8         12          6          6          8         10   
 29       7          9         11         11         10         14          9   
 30      11         10         11          9          7         10          9   
 31      21         16         14         13         10         10         18   
_______________________
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 950 (1998 Mar 22 - Mar 28)
 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    .942       -.764        54.6        4.31        2.36    
AREQ*  5.0    124.        .146        70.8        4.22        1.66    
ASC1   4.6    .580e+04    .259        64.6        5.17        1.29    
AUCK   3.0    91.9        .272        43.0        4.00        1.98    
BAHR   5.5    .115e+05    144.        40.0        4.39        2.29    
BOGT   5.5    401.        .137        66.5        5.00        1.50    
CAS1   4.7    .679e+07   -.127e+05    38.6        5.82        .932    
CASA   3.0    12.9        61.1        44.1        6.67        2.68    
CHAT   1.0    95.0        .117        82.0        5.00        2.40    
COCO   5.9    180.       -.145e+05    55.2        6.23        2.26    
CRO1   1.0    181.       -.259        60.0        6.00        1.82    
DAV1*  6.9    139.        .159          .         5.00        1.40    
DGAR   4.3    .125e+04    .116        66.6        6.08        1.60    
DRAO   1.0    .119       -.893        36.0        4.00        2.83    
EISL   7.0    126.        .134        60.7        5.15        2.25    
FAIR*  7.0    .977        .150e-01    37.3        4.60        1.69    
FORT*  7.0    .955       -.420e-01    87.9        6.31        1.53    
GOL2*  6.7    108.        .887        54.7        4.27        1.49    
GUAM*  7.0    122.        .966e-01    71.1        5.77        1.82    
HARK*  6.0    11.5       -.789e-02    60.0        5.10        2.46    
IISC   5.8    186.        .190        78.4        5.36        1.75    
IRKT*  4.9    .164        .620        55.0        4.21        2.01    
KELY    .6    .409e+04   -1.88          .         5.00        1.54    
KERG*  3.7    .329e+04    .232e+04      .         6.25        2.46    
KIT3*  2.6    174.        .225e-01    75.6        4.00        2.20    
KOKB*  7.0    1.08       -17.1        83.2        5.30        2.09    
KWJ1*  6.8    227.        .122        78.9        5.72        1.77    
LHAS*  4.0    108.        .224        66.2        4.54        2.00    
LPGS   2.7    325.        .219        60.4        4.72        2.11    
MAC1*  5.8    86.8        .143        44.5        4.20        1.66    
MAD2*  6.9    427.        .999        56.9        5.34        1.75    
MAG0    .9    .289e+06    487.        31.0        4.00        2.27    
MALI*  7.0    99.2       -175.        98.1        7.44        1.61    
MCM4   2.0    92.5        .117        42.5        4.49        .861    
MDVO   1.0    .645        563.        70.0        6.00        1.99    
MEDI    .8    .552e-01   -4.21        33.0        4.00        2.92    
METS   1.0    31.7        20.1        68.0        3.00        2.35    
MKEA   3.9    .869e-01   -.371        69.5        4.00        1.91    
NLIB*  1.0    .204        .540        53.0        6.00        2.57    
NRC1   5.1    .193       -.362        78.1        4.10        2.25    
NTUS    .8    316.        .156        92.0        6.00        1.57    
NYAL   5.4    36.5       -.912e-02    71.6        5.14        1.33    
OHIG*  5.6    .793e+06    2.25        64.9        4.84        1.12    
ONSA*  6.8    811.       -1.61        39.7        3.30        1.70    
PETR   2.9    93.6        .267        45.0        5.00        2.52    
PIE1*  1.0    .155       -.242        47.0        5.00        2.65    
POL2   1.9    76.7        .114        62.5        4.00        2.43    
RCM6   1.0    96.8        .948e-01    89.0        4.00        1.42    
REYK   1.0    94.4        .806e-01    57.0        6.00        1.26    
SANT*  2.1    .357e+07    154.        48.4        4.00        1.11    
TAHI    .8    162.        .164        84.0        6.00        2.68    
TID2*  7.0    767.        .297        38.7        5.09        1.90    
TSKB*  7.0    1.67       -1.64        52.0        4.31        2.51    
USNO   1.0    .           .           61.0        5.00        2.73    
USUD   5.0    148.        1.28        52.0        4.00        2.15    
WES2   3.0    .367        1.19        69.8        4.35        2.48    
WTZR*  7.0    .950        .864        63.0        4.15        2.38    
WUHN   1.0    5.28       -877.        55.0        5.00        1.31    
XIAN   1.0    97.7       -.234        54.0        4.00        2.96    
YAKA    .9    119.        .132        56.0        4.00        2.29    
YAKZ   1.0    .288e+06    442.        42.0        5.00        2.08    
YAR1*  7.0    91.2        .134        39.5        3.87        1.81    
YELL*  7.0    31.5        8.56        43.1        4.60        1.20    
PRN01  7.0    78.2        43.0        55.6        4.86        2.16    
PRN02  7.0    82.3       -468.        66.6        5.00        1.97    
PRN03  7.0    82.6        112.        58.4        5.00        2.14    
PRN04  7.0    81.4        18.6        61.9        4.87        1.91    
PRN05  7.0    82.9        142.        63.5        4.60        2.41    
PRN06  5.0    81.5       -.129        62.9        5.00        1.95    
PRN07  7.0    82.5        773.        61.1        4.87        2.01    
PRN09  6.9    82.4       -34.7        62.3        5.00        1.99    
PRN10  7.0    79.0        20.1        63.8        5.00        1.93    
PRN14  7.0    79.3        28.2        54.9        5.00        2.31    
PRN15  7.0    3.10        538.        65.0        5.00        2.04    
PRN16  7.0    78.7        54.9        57.9        5.00        2.19    
PRN17  7.0    80.5       -176.        64.6        5.00        1.95    
PRN18  7.0    80.9        12.5        61.8        5.16        1.92    
PRN19  6.7    81.7        388.        66.5        5.31        1.88    
PRN21  7.0    80.4        30.5        56.3        5.15        2.30    
PRN22  6.9    .471e+04    24.0        58.2        5.00        2.04    
PRN23  7.0    81.7        11.5        57.6        5.00        2.16    
PRN24  7.0    81.2        821.        64.4        4.61        2.10    
PRN25  6.8    83.4       -6.66        57.9        5.00        2.02    
PRN26  6.0    82.6       -139.        57.5        5.18        2.06    
PRN27  6.8    83.0        22.4        66.3        5.47        1.89    
PRN29  7.0    81.7        341.        55.3        4.87        2.35    
PRN30  7.0    81.5       -30.9        60.2        5.03        2.19    
PRN31  6.9    80.6        2.55        63.0        5.00        2.10    
_______________________
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
      98  3 22   98  3 23   98  3 24   98  3 25   98  3 26   98  3 27   98  3 28
prn   3d rss (cm)
  1     706        379        470        439        314        264        241   
  2     552        223        163        288        175        232        260   
  3     547        288        282        237        233        171        304   
  4     623        566        393        404        286        855        228   
  5     340        399        422        486        266        178        165   
  6    1323                  1051        615        501        647        553   
  7     334        376        250        327        655        188        163   
  8     223        299        376        447        506                   935   
  9     249        268        384        309        636        246        268   
 10     658        567        521        382        541        435        430   
 13     722        551       1007        437        250        375        216   
 14     721        650        721        455        492        707        388   
 15     263        282        322        215        272        320        216   
 16     803        572        355        370        428        356        265   
 17     269        615        471        255        211        428        466   
 18     274        267        399        332        522        325        277   
 19     449        413        619        273        199        366        196   
 21     396        354        395        329        304        394        411   
 22     530        522        493        460        551        403        325   
 23     416        384        561        531        449        601        337   
 24     841        486        243        241        310        181        165   
 25     794        364        602        414        431        295        345   
 26     106        154        183        200        704                   153   
 27     547        506        427        728        451        388        436   
 29     228        176        246        377        224        229        296   
 30     452        264        350        329        254        170        198   
 31     527        402        584        305        282        302        418   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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