Subject: [IGSREPORT-4888] Wk 0956 JPL Analysis Report
From: D C Jefferson
Date: Thu, 14 May 1998 17:15:16 PDT

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IGS Electronic Report    Thu May 14 17:15:16 PDT 1998      Message Number 4888
******************************************************************************

Author: D C Jefferson
Subject: Wk 0956 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0956 (DAYS 123-129, DATES 1998 May 03 - May 09)
******************************************************************************

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/0956.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09567.sum         This text file.
jpl09567.erp         Earth rotation parameters for GPS week 956.
jpl09567.snx         Ground station coordinates for GPS week 956, SINEX format.
jpl0956[0-6].sp3     GPS ephemerides for GPS week 956, sp3 format.
jpl0956[0-6].tro     Ground station troposphere estimates for GPS week 956.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 8.0 cm

STRATEGY UPDATE
---------------
Beginning day 126, we have relaxed the apriori constraint on X and Y pole
rates from about 18 to 50 10**-5"/d.

GENERAL
-------
According to the file nanu1998.mes obtained from the IGS CBIS, PRN13 was
unusable days 122 through 128.  Data from this satellite were mismodeled
on days 127 and 128, and have been excluded from the analyses of these days
only.

A large clock discontinuity (reset) of about 118 microseconds was detected
for PRN03 at approximately 12:45 on day 126.

Please note that due to local computer maintenance, this report is being
submitted prior to the availability of the solution for day 130 (May 10;
week 957, day 0).  Hence, the orbit repeatabilities presented for day 129
in the overlap table are indicative of comparisons with day 128 only.

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 USNO) used as reference clock day 123.
WARNING: PIE1 (not USNO) used as reference clock days 125 and 126.
WARNING: Data from PRN13 excluded days 127 and 128.
WARNING: Data from LHAS excluded day 123.
WARNING: Data from BAHR, DAV1, KSTU, LHAS, TROM excluded day 124.
WARNING: Data from BILL, DAV1, KELY, LHAS, PIN1, TROM excluded day 125.
WARNING: Data from COCO, SANT excluded day 126.
WARNING: Data from NYA1, NYAL, SUTH, TROM excluded day 127.
WARNING: Data from MAD2, NYAL excluded day 128.
WARNING: Data from KSTU, POTS excluded day 129.

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 956 (1998 May 03 - May 09)
     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
50936.50 -11353  33316   -33690  1976    2    3     9      9 37 18 27  -17  196 
50937.50 -11378  33522   -35611  1867    2    3     9      9 37 22 27    1  168 
50938.50 -11401  33757   -37462  1835    2    3     9      9 37 22 27  -39  240 
50939.50 -11418  34001   -39322  1884    2    2     8      8 37 21 27   19  188 
50940.50 -11420  34215   -41205  1883    2    3     9      9 37 24 26    0  176 
50941.50 -11415  34436   -43063  1832    3    3     9      9 37 24 26   -8  131 
50942.50 -11387  34634   -44915  1872    2    2     8      8 37 23 27   41  161 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 956:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 956 (1998 May 03 - May 09)
      98  5  3   98  5  4   98  5  5   98  5  6   98  5  7   98  5  8   98  5  9
prn   3d rss (cm)
  1      16          4          5         15          6          9          5   
  2       6          5          5          5          6         10          6   
  3       4          5          6          5         13          7          5   
  4       7          7          5         13         10          9          4   
  5       9         10          9          7          5         10          6   
  6      10         30         18          7          8          5         11   
  7      18          8          9          8          5         13         12   
  8      10         15         10          5          7          6          6   
  9      10          9         10         15          7          8          7   
 10       8         12          6          9         11          5          3   
 13       8          8          4          8                                    
 14      24         11          9          9          6         10          8   
 15      14         12         12         10          6          8          6   
 16      11          9          7          5          8          9         10   
 17      13          9          4          5          9          9          4   
 18      11          5          6          9          8          9          8   
 19      15          5         11         11          4          6          4   
 21      24          5          3          8          7         10          4   
 22       4          4          9          6          7          4          4   
 23      16         23         17         13         11         16          4   
 24       4          5          8         12          9         10         13   
 25       5          6          5          5          7          6          6   
 26      14         21          9          9          8          6          4   
 27       9          4          4          7          7          8          3   
 29       9         11          9          5          9          8          4   
 30       8         18          6         12          6          6          4   
 31      17          8          8         13          9         10          7   
_______________________
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 956 (1998 May 03 - May 09)
 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    .183        .456        61.4        4.59        2.49    
AREQ*  1.0    93.8       -.203        51.0        4.00        2.27    
ASC1   6.4    264.       -.184        77.9        5.22        1.39    
AUCK   5.9    86.2       -.184        41.8        4.69        2.83    
BAHR   2.0    .535        130.        46.5        4.00        3.14    
BARB   1.7    103.       -.288        34.0        7.51        3.34    
BRUS   1.0    .778        8.11        61.0        4.00        3.04    
CAS1   5.7    .811e+07   -.151e+05    36.3        5.84        1.19    
CASA   2.0    38.8        10.5        45.5        6.00        2.58    
CHAT   1.0    104.       -.240        81.0        6.00        2.89    
COCO   4.9    110.       -.203e+05    46.0        6.49        2.89    
CRO1   5.0    500.       -.169        61.3        5.28        2.00    
DAV1*  2.8    125.       -.203          .         5.00        1.34    
DGAR   6.7    852.       -.277        73.0        6.21        1.72    
DRAO   1.0    .167       -.197        38.0        5.00        3.06    
EISL   6.6    145.       -.202        60.1        5.00        2.88    
FAIR*  6.9    5.28       -.227        60.1        5.01        1.81    
FORT*  6.9    .902e+04   -27.7        80.9        6.45        1.67    
GALA   3.8    141.       -.169        76.5        6.26        1.53    
GOL2*  7.0    .311        .964        55.2        4.91        2.19    
GUAM*  7.0    128.       -.206        62.6        6.45        2.37    
HARK*  4.9    993.       -4.71        54.6        4.23        2.63    
HRAO   3.0    43.1       -1.43        39.7        3.70        2.58    
IRKT*  4.8    .304        .130        58.8        5.00        2.68    
KELY   2.9    105.       -.214          .         5.00        1.42    
KERG*  4.6    .390e+04    981.          .         5.21        2.31    
KIT3*  6.8    132.       -.188        75.5        4.46        2.17    
KOKB*  7.0    .299       -.523e-01    76.5        5.00        2.46    
KWJ1*  7.0    139.       -.193        79.9        6.15        1.91    
LHAS*  2.0    117.       -.228          .         5.00        2.63    
LPGS    .9    192.       -.150        51.0        5.00        3.00    
MAC1*  5.8    95.9       -.181        36.9        4.50        1.96    
MAD2*  1.6    464.        1.56        66.4        6.38        1.79    
MAG0   2.0    .289e+06    485.        34.0        5.00        2.31    
MALI*  5.5    .701e+05   -891.        91.5        7.00        1.86    
MAS1*  3.8    312.        .439e-01    58.0        4.00        2.44    
MATE*  3.0    .139       -2.06        45.3        5.09        3.02    
MCM4   3.9    105.       -.163        36.1        4.80        1.16    
MDVO   1.8    .398        502.        73.5        6.52        2.18    
MEDI    .9    .142       -16.7        34.0        3.00        3.08    
MKEA   3.0    .140       -.175        60.1        4.38        2.76    
NOTO    .8    .333       -2.44        34.0        4.00        3.16    
NOUM   1.0    .289e+06    501.        67.0        6.00        2.02    
NRC1   1.0    .425e-01   -.335        64.0        4.00        3.25    
NTUS    .7    739.       -.950e-01    65.0        7.00        1.48    
NYA1   5.8    46.6       -.289        41.3        5.33        1.58    
OHIG*  4.4    .155e+04   -.125e-01    64.0        5.00        1.37    
ONSA*  7.0    .211       -.102        42.3        4.00        2.26    
PETR   3.0    91.5       -.152        52.1        5.00        2.42    
PIE1*  2.0    .           .           57.6        4.54        2.79    
SANT*  5.4    634.       -.665        47.7        5.00        1.22    
SUTH   2.0    103.       -.228        37.3        4.00        2.39    
TID2*  7.0    .194        6.38        38.8        5.44        2.55    
TSKB*  7.0    1.40       -2.27        50.3        4.89        3.01    
USNO   4.3    .           .           56.9        5.53        2.74    
USUD   3.0    .542        .943        46.4        5.36        2.77    
WTZR*  6.1    .247        1.12        63.5        4.17        2.73    
WUHN   4.9    9.31       -86.4        52.4        5.22        2.45    
YAKA   2.0    108.       -.227        64.0        5.00        2.39    
YAR1*  7.0    85.4       -.194        38.6        4.16        2.26    
YELL*  7.0    .221       -.227        46.9        5.14        1.40    
ZECK   2.0    72.9       -.217        46.0        5.08        2.61    
PRN01  7.0    82.9        46.4        54.3        5.15        2.05    
PRN02  7.0    81.8       -484.        61.0        5.00        2.18    
PRN03  6.8    .865e+04    74.7        56.7        5.16        2.27    
PRN04  6.6    81.0        25.1        56.9        5.16        1.88    
PRN05  6.9    81.3        148.        59.4        5.00        2.07    
PRN06  7.0    82.2       -.422        60.2        5.45        1.97    
PRN07  6.9    93.8        777.        56.9        5.00        1.97    
PRN08  7.0    81.8        621.        58.5        5.46        1.92    
PRN09  7.0    80.4       -40.3        57.6        5.15        2.03    
PRN10  7.0    80.8        21.3        61.2        5.15        2.01    
PRN13  5.0    81.3        821.        57.4        5.22        2.06    
PRN14  7.0    80.6        29.3        53.5        5.15        2.22    
PRN15  6.6    3.66        552.        62.0        5.00        2.04    
PRN16  7.0    79.8        60.5        58.9        5.15        2.20    
PRN17  6.7    80.9       -179.        62.2        5.00        1.96    
PRN18  7.0    81.2        13.7        56.2        5.30        2.13    
PRN19  7.0    79.9        390.        59.0        5.00        2.06    
PRN21  7.0    80.1        37.6        59.4        5.00        2.02    
PRN22  7.0    82.0        1.05        57.5        5.16        2.09    
PRN23  7.0    80.5        12.7        60.6        5.89        2.05    
PRN24  6.6    81.4        839.        58.6        5.15        2.03    
PRN25  7.0    81.5       -6.74        52.4        5.00        2.07    
PRN26  7.0    80.1        31.7        56.8        5.44        2.02    
PRN27  7.0    80.7        26.4        58.2        5.00        2.11    
PRN29  7.0    80.6        455.        52.9        5.00        2.24    
PRN30  7.0    81.1       -37.5        55.8        5.33        2.10    
PRN31  7.0    81.4        3.31        58.9        5.15        2.13    
_______________________
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  5  3   98  5  4   98  5  5   98  5  6   98  5  7   98  5  8   98  5  9
prn   3d rss (cm)
  1     473        345        290        320        315        309        292   
  2     684        616        520        787        414        400        426   
  3     203        192        166        251        382        384        237   
  4     894        412        582        320        561        445        383   
  5     395        274        427        416        245        213        430   
  6     386        510        650        489        380        393        374   
  7     936        414        248        438        303        339        476   
  8     862        799        807        735        262        274        375   
  9     257        237        195        211        635        293        511   
 10     561        365        303        337        477        296        306   
 13     470        199        557        665                             2194   
 14     661        564        285        290        471        890        555   
 15     386        554        402        382        260        336        294   
 16     707       1765        391        587        248        806        463   
 17     648        393        357        255        328        352        262   
 18     328        292        287        434        596        371        489   
 19     935       1049        213        464        820        345        245   
 21     183        218        288        252        236        368        550   
 22     244        242        281        300        438        527        338   
 23     684        556        518        640        824        203        716   
 24    1295        896        458        531        293        138        245   
 25     504        349        524        519        221        280        328   
 26     166        230        309        196        335        186        274   
 27     333        580        411        566        301        377        315   
 29     183        236        287        238        252        243        321   
 30     188        346        319        419        421        217        274   
 31     372        457        339        261        342        549        159   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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