Subject: [IGSREPORT-3926] Wk 0912 JPL Analysis Report
From: D C Jefferson
Date: Thu, 10 Jul 1997 17:02:52 PDT

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IGS Electronic Report    Thu Jul 10 17:02:52 PDT 1997      Message Number 3926
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Author: D C Jefferson
Subject: Wk 0912 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0912 (DAYS 180-186, DATES 1997 Jun 29 - Jul 05)
******************************************************************************

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/0912.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09127.sum         This text file.
jpl09127.erp         Earth rotation parameters for GPS week 912.
jpl09127.snx         Ground station coordinates for GPS week 912, SINEX format.
jpl0912[0-6].sp3     GPS ephemerides for GPS week 912, sp3 format.
jpl0912[0-6].tro     Ground station troposphere estimates for GPS week 912.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 12.0 cm

A large clock discontinuity of about 1.4 microseconds was detected for ALGO
at approximately 00:10 UT on day 180.  Hence, this site was not used as a
reference clock for this nor the previous day (179).

Data from PRN15 did not meet our initial orbit convergence criteria on days
181 through 183.  Data from PRN10 were similarly anomalous on days 183 and
184.  Consequently, no data from these satellites were included in the
analyses of the corresponding days.

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: NLIB (not ALGO) used as reference clock day 180.
WARNING: Data from PRN15 not used on days 181-183.
WARNING: Data from PRN10 not used on days 183 and 184.
WARNING: Data from CAGL, LHAS, METS, STRL, TAEJ excluded day 180.
WARNING: Data from LHAS, LMNO, METS, NYAL excluded day 181.
WARNING: Data from CLAR, CSN1, KELY, LHAS, METS, POTM, SNI1, TAIW excluded
         day 182.
WARNING: Data from CSN1, KELY, SOL1, TAIW excluded day 183.
WARNING: Data from DAV1, KELY excluded day 184.
WARNING: Data from CRO1, CSN1 excluded day 185.
WARNING: Data from CRO1, CSN1, SANT excluded day 186.

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 912 (1997 Jun 29 - Jul 05)
     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
50628.50   1284  53567  -467858   940    3    3     8      8 37 10 25  440   74 
50629.50   1726  53621  -468818   980    3    3     8      8 37 10 24  450  115 
50630.50   2170  53695   530213   958    3    3     8      8 36 10 24  403   32 
50631.50   2571  53724   529280   908    4    4     8      8 36 10 23  405   65 
50632.50   2960  53720   528390   872    4    4     8      8 36 10 24  398    6 
50633.50   3329  53696   527523   861    3    3     8      8 37 10 25  395   36 
50634.50   3712  53668   526633   920    3    4     7      7 36  9 25  366   55 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 912:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 912 (1997 Jun 29 - Jul 05)
      97  6 29   97  6 30   97  7  1   97  7  2   97  7  3   97  7  4   97  7  5
prn   3d rss (cm)
  1      10          9         18         35         19         13          7   
  2      10         26         29          9          8          6         10   
  3      12         19         17         16         12         14         12   
  4      13         15         10         10         11         12         12   
  5      18         28         20         14         20         43         34   
  6      20         16         11         15         17         19         18   
  7       7         11          8         20         20         20         25   
  9      15         16         16         14          8         17          9   
 10       9          8         11                                6         17   
 14      11         12          9         14         14         19         13   
 15      10                                          11          7         12   
 16       8         15          9         13         11          7          7   
 17      11         14          9         15         14         15         20   
 18      10          8          9          9          7          7         13   
 19      15         12         11         11         10         12         11   
 21      16         13         14         14         14         11         13   
 22      13          8          9         11         19         21          8   
 23      11         13         12         18          9          7         10   
 24      12         14         13          7         13         20         16   
 25      11         12         10         14         18         24         10   
 26       9         10          5         11          6         10          8   
 27       9          9          7         10          9          7          9   
 29      11         10          7         10         12         16          7   
 30      17         21         23         21         18         46         37   
 31      15         17         16         12          6         14         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 912 (1997 Jun 29 - Jul 05)
 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*  6.9    369.       -3.20        49.5        6.34        3.03    
AREQ   2.0    102.       -.425        36.0        5.00        2.39    
ASC1   6.9    91.2       -.759        74.6        5.73        1.67    
BAHR   7.0    .528        129.        53.7        4.87        4.00    
BRAZ   1.0    167.       -.306        51.0        4.00        3.77    
BRMU   2.0    121.       -.386        38.5        6.00        2.90    
BRUS   1.0    .844e-01    5.08        61.0        4.00        2.56    
CAS1   1.9    8.42        .358e+04    38.0        5.00        2.19    
CASA   3.0    17.3        106.        38.7        4.69        3.26    
CHAT   6.0    107.       -.811        77.2        5.18        2.73    
CICE   1.0    521.       -.200e-01    32.0        4.00        2.53    
CRO1   5.0    169.       -.872        47.5        5.21        2.21    
DAV1   2.0    89.8        681.        30.5        4.52        1.56    
DGAR   7.0    86.5       -.753        50.6        5.76        1.84    
FAIR*  7.0    2.94       -.243        39.4        5.59        2.54    
FLIN   2.0    82.3       -.428        47.5        5.52        2.93    
FORT   7.0    33.2       -1.15        49.2        6.37        3.17    
GUAM   7.0    122.       -.753        72.2        8.46        2.38    
HARK   5.0    5.80        18.2          .         4.00        2.94    
HARV   2.0    .868e+07    .149e+05    68.6        5.00        2.74    
IRKT   4.9    .217       -.946        65.4        5.23        2.55    
KELY   1.0    98.4       -.579e-01    43.0        6.00        1.81    
KERG   5.0    101.       -2.24          .         5.82        2.56    
KIRU   4.0    78.4       -.752        54.0        6.52        2.29    
KIT3   7.0    150.       -.745        52.1        4.75        2.93    
KOKB*  6.3    189.       -.655        61.7        6.50        1.58    
KOSG*  7.0    .711       -26.0        45.6        4.90        2.59    
KWJ1   7.0    105.       -.747        54.2        7.64        1.76    
LHAS    .6    .970e+04   -1.02          .         4.00        1.93    
MAC1   3.7    81.3       -1.18        30.5        3.29        2.41    
MAD2   3.0    196.       -.447        102.        6.00        2.05    
MADR*  6.9    .854       -.437          .         6.33        2.20    
MALI   7.0    .661e+05   -399.          .         8.59        2.69    
MAS1   2.9    .148e+04    3.52        41.3        4.38        2.28    
MCM4   6.0    88.0       -.807        31.2        4.00        2.02    
MDVO   1.0    .567        560.        68.0        7.00        1.97    
MKEA   6.0    .746e-01   -.847        40.0        5.85        2.87    
MOIN   7.0    89.3       -.748        62.2        6.88        1.94    
NLIB   1.0    .           .           56.0        9.00        2.90    
PERT   7.0    11.2       -4.47        55.6        4.77        2.85    
PIE1   1.0    .861e-01   -.210e-01    52.0        4.00        2.95    
RCM6   1.0    144.       -.309        54.0        10.0        2.49    
REYK   6.0    79.4       -.852        57.5        6.18        2.33    
SANT*  4.8    .164e+04   -1.15        33.7        5.52        1.37    
STJO   7.0    9.76       -.577        40.7        4.91        2.91    
TAHI   5.9    122.       -.828        74.0        5.68        2.47    
THU1   3.9    73.2       -1.10        44.3        5.25        2.73    
TID2*  7.0    13.0       -.641        37.5        5.00        3.03    
TOUL   3.0    .497       -.121        56.1        5.00        2.88    
USUD   7.0    3.00        .459        38.5        6.05        2.93    
WTZR*  6.6    362.       -2.03        63.4        5.16        2.44    
WUHN   5.9    6.38       -.511e+04    48.9        6.49        2.85    
XIAN   1.0    99.6       -.457        42.0        5.00        2.96    
YAR1*  7.0    2.29        5.24          .         4.22        2.41    
YELL*  7.0    51.3       -.772        43.1        5.04        1.97    
PRN01  6.9    81.1        22.3        55.8        5.86        2.21    
PRN02  7.0    78.9       -380.        57.4        5.59        2.40    
PRN03  7.0    81.0        28.0        54.6        5.87        2.70    
PRN04  7.0    82.2        34.2        52.3        5.87        2.54    
PRN05  7.0    79.8        101.        52.8        5.45        2.46    
PRN06  7.0    82.2       -.850        50.0        6.15        2.41    
PRN07  7.0    80.1        748.        56.1        5.60        2.22    
PRN09  7.0    81.0       -3.45        52.8        5.59        2.49    
PRN10  4.7    78.5        9.07        55.3        5.82        2.23    
PRN14  6.7    81.6        19.2        52.0        5.89        2.35    
PRN15  4.0    4.40        442.        53.8        6.27        2.20    
PRN16  6.6    83.0        17.2        54.8        5.59        2.24    
PRN17  7.0    81.2       -153.        53.0        5.87        2.32    
PRN18  7.0    81.9        1.04        47.7        5.60        2.45    
PRN19  7.0    80.6        71.8        53.2        5.31        2.30    
PRN21  6.8    80.9        63.6        53.9        6.15        2.38    
PRN22  7.0    81.1        .791e-02    48.9        6.00        2.44    
PRN23  6.8    83.2        .367        57.3        6.31        2.52    
PRN24  7.0    80.4        616.        55.5        5.87        2.30    
PRN25  7.0    77.6       -6.34        50.7        6.00        2.22    
PRN26  7.0    82.0       -200.        53.6        5.73        2.59    
PRN27  7.0    81.1        33.4        51.4        5.87        2.47    
PRN29  7.0    81.5        170.        52.7        5.30        2.74    
PRN30  6.9    84.8       -66.3        55.5        5.15        2.44    
PRN31  7.0    81.1        467.        52.6        6.00        2.50    
_______________________
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 29   97  6 30   97  7  1   97  7  2   97  7  3   97  7  4   97  7  5
prn   3d rss (cm)
  1     489        545        492        461        427        324        429   
  2     341        551        556        242        256        366        354   
  3     696        406        316        544        312        324        557   
  4     733        639        509        607        535        464        546   
  5     527        495        566        535        470        576        468   
  6    1004        664        775        750        950        760        741   
  7     467        521        731        343        293        428        363   
  9     226        276        232        284        297        290        347   
 10     359        417        578                              496        523   
 14     419        639        528        425        321        401        952   
 15     367                                         222        317        294   
 16     289        518        621        448        286        672        445   
 17     570        401        310        321        277        306        304   
 18     520        556        656        287        316        532        857   
 19     331        573       1455        499        685        566        245   
 21     490        398        489        686        633        510        568   
 22     698        520        549        541        540        610        828   
 23     565        606        439        553        609        455        568   
 24     542        450        689        464        632        467        507   
 25     783        416        427        443        702        970        444   
 26     326        638        363        396        370        301        392   
 27     211        265        190        159        152        340        196   
 29     784        857        695        456        433        438        482   
 30     218        334        332        225        318        323        374   
 31     300       1009        502        217        240        258        231   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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