Subject: [IGSREPORT-4560] Wk 0941 JPL Analysis Report
From: D C Jefferson
Date: Mon, 2 Feb 1998 13:46:25 PST

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IGS Electronic Report    Mon Feb  2 13:46:25 PST 1998      Message Number 4560
******************************************************************************

Author: D C Jefferson
Subject: Wk 0941 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0941 (DAYS 18-24, DATES 1998 Jan 18 - Jan 24)
******************************************************************************

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/0941.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09417.sum         This text file.
jpl09417.erp         Earth rotation parameters for GPS week 941.
jpl09417.snx         Ground station coordinates for GPS week 941, SINEX format.
jpl0941[0-6].sp3     GPS ephemerides for GPS week 941, sp3 format.
jpl0941[0-6].tro     Ground station troposphere estimates for GPS week 941.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 12.0 cm

We continue to exclude all data from PRN13 and deweight data from PRN08 this
week.  Data from the latter satellite were mismodeled on days 022 and 023, and
have been excluded accordingly.  Data from PRN16 were similarly mismodeled on
day 024, and have been excluded on this day only.

Beginning this week we add a new candidate station.  As with other sites,
this station is given the opportunity to participate in the orbit and clock
solution as the global site distribution varies.  The following nominal
coordinates were assumed:
                                     X (m)          Y (m)          Z (m)
  BARB (Bridgetown, Barbados)   3143384.5588  -5359714.6846   1434871.5170

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 PRN13 excluded the entire GPS week 941.
WARNING: Data from PRN08 deweighted days 018-021 and 024; excluded days 022              and 023.
WARNING: Data from PRN16 excluded day 024.
WARNING: Data from KELY excluded day 019.
WARNING: Data from TAHI excluded day 020.
WARNING: Data from BOR1, PETR excluded day 021.
WARNING: Data from BOR1, PETR excluded day 022.
WARNING: Data from BOR1, PETR excluded day 023.
WARNING: Data from PETR excluded day 024.

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 941 (1998 Jan 18 - Jan 24)
     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
50831.50   5274  16774   182183  1841    3    3     8      8 37 10 26 -260   -3 
50832.50   4964  16807   180332  1862    4    4     9      9 37  7 26 -279   20 
50833.50   4649  16823   178459  1883    6    7     9      9 37  6 26 -319  -28 
50834.50   4342  16817   176606  1823    8    7     9      9 37  5 26 -320  -45 
50835.50   3946  16755   174771  1847    7    7     9      9 37  6 25 -346  -69 
50836.50   3621  16713   172875  1946    7    7    10     10 37  5 25 -351  -55 
50837.50   3278  16696   170931  1942    9    8    10     10 37  5 25 -301  -65 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 941:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 941 (1998 Jan 18 - Jan 24)
      98  1 18   98  1 19   98  1 20   98  1 21   98  1 22   98  1 23   98  1 24
prn   3d rss (cm)
  1      11          8          8          9         10          8         13   
  2      11          7         14         10          7          9         15   
  3       8          7         16         24          9         13         14   
  4       9         13         14         22         16         32         12   
  5       7         16         11          9         18         18         12   
  6      10         25         16         23         10         21         26   
  7       8         10         13          9         11          9         22   
  8      30         31         47         78                               14   
  9      14          9          7          9         10         11         12   
 10       7         15         27         32         23         24         28   
 14      33         17          8         12         17         38         22   
 15       7         13         11         11          9         12         11   
 16       8         12          7         10         14          6              
 17      12          9         26         15         13          9         13   
 18      14         16         15         12         34         34         17   
 19      14         18          8         12         13         17         20   
 21      10          8         16          9          9         14         12   
 22      10         18         18         11         11         12         10   
 23       6          9         21         24         20         11         17   
 24       8         16          6         14         12         19         20   
 25      14         10         13         12         19         17         12   
 26      11         17         19         22         19         15         16   
 27      10          9         10          9          9         14         13   
 29      12          6          8          8          8          6         15   
 30       8         17         12          8         18         19         19   
 31       9          9          9         17         10         13         15   
_______________________
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 941 (1998 Jan 18 - Jan 24)
 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)
 |     |      |           |           |           |           |
 |___  |__    |_______    |_______    |___        |___        |__
ALBH   4.0    6.01        6.16        42.2        3.98        2.77    
ALGO*  7.0    .120        6.63        43.1        4.00        3.13    
ANKR   4.8    160.        .104e-01    58.3        4.00        3.06    
AREQ   1.8    102.        .351e-01    51.5        5.06        2.52    
ASC1   2.7    292.        .197e-01    82.4        5.00        1.31    
AUCK    .8    87.0        .332e-01    42.0        5.00        2.36    
BAHR   7.0    .610        234.        42.6        4.45        2.96    
BRMU   5.0    116.        .280e-01    36.4        5.22        2.70    
BRUS   5.0    .316        4.94        62.4        4.67        2.40    
CAS1   3.8    .700e+07   -.138e+05    37.7        5.50        1.32    
CHAT    .9    105.        .950e-02    75.0        5.00        3.04    
CHUR   3.0    2.63       -1.16        37.0        5.00        1.78    
COCO   1.5    59.8       -.610e+04    41.0        4.53        2.23    
CRO1   4.3    541.        .561e-01    44.7        5.25        1.82    
DGAR   1.9    175.        .889e-02    73.5        7.12        1.47    
DRAO   1.0    .119       -.170        34.0        4.00        3.11    
DUBO   3.1    127.        .421e-01    36.9        3.00        2.45    
EISL   2.5    139.        .410e-01    48.6        5.39        2.88    
FAIR*  3.4    .928e-01   -.189        34.7        4.51        2.18    
FORT   7.0    .167       -.418e-01    67.6        7.15        1.45    
GALA   3.7    87.1        .198e-01    68.0        5.88        1.71    
GRAZ   1.0    .474        .220e-01    60.0        4.00        2.60    
GUAM    .6    .151e+04    .186        51.0        7.00        1.76    
HARK   5.8    64.5       -1.50        56.8        6.00        2.28    
HOB2   3.8    86.7        .325e-01    51.0        5.07        2.34    
IISC   4.6    599.       -.507e-01    67.7        5.23        1.98    
IRKT   5.8    77.2       -.199        44.9        4.86        2.05    
KELY    .6    .397e+04   -1.31          .         5.00        1.39    
KERG   4.7    216.        .121e+04      .         5.43        2.51    
KIRU   6.0    562.        1.82        52.5        6.34        1.96    
KIT3   5.8    108.        .220e-01    53.7        4.51        2.94    
KOKB*  1.8    .580e-01    .361e-01    62.6        5.00        2.34    
KOSG*  5.9    2.93       -5.30        38.5        3.19        2.32    
KOUR   3.0    3.07        .527          .         6.34        1.23    
KWJ1   2.7    117.        .108e-01    57.3        5.73        1.85    
LPGS   2.0    547.        .212e-01    58.0        5.52        3.30    
MAC1   5.5    89.7        .319e-01    47.2        4.18        2.20    
MAD2*   .9    .626e-01   -1.25        68.0        6.00        2.50    
MALI   7.0    .137e+05   -107.          .         6.15        2.10    
MAS1   4.9    164.        .447        44.2        4.00        2.45    
MCM4   1.8    119.        .248e-01    66.1        5.00        1.50    
MDO1   3.8    40.9       -21.4        34.2        4.00        2.31    
MDVO   5.9    .164        212.        66.4        6.00        1.71    
MKEA   4.8    .673e-01   -.230        52.6        4.43        2.10    
NRC1   7.2    .           .           65.9        4.00        3.03    
OHIG   4.5    .288e+05    2.79        58.7        4.64        1.37    
ONSA   1.0    .738e-01    2.13        43.0        4.00        2.33    
PERT   7.0    16.9       -14.1        50.3        4.16        2.43    
PIE1   2.9    72.7       -.202        49.2        4.71        2.49    
QUIN    .7    .681e+05    13.8        60.0        5.00        2.40    
RCM6   6.0    94.4        .270e-01    64.2        4.55        2.59    
REYK   6.0    75.4        .291e-01    57.9        5.85        2.10    
SANT*  6.5    921.        .284        46.5        4.33        1.23    
STJO   4.9    65.9        .303        38.0        4.00        2.45    
TAEJ   1.0    3.01        950.        41.0        5.00        3.24    
TAHI   3.3    .258e+05    1.27        86.4        6.47        2.43    
THU1    .9    72.5        .100e-01    43.0        5.00        2.48    
TID2*  1.8    .533e-01   -.232e-01    39.7        6.56        2.74    
TSKB   1.0    .907       -1.27        42.0        4.00        3.28    
USUD   5.8    .837        .576        44.5        4.36        2.64    
VILL   3.0    3.13       -1.53        54.5        3.70        2.79    
WTZR*  7.0    .810e-01    1.29        66.1        4.15        2.59    
WUHN   4.9    7.27       -233.        44.6        4.21        2.24    
YAR1*   .9    83.4        .151e-01      .         4.00        2.53    
YELL*  7.0    17.5       -6.54        44.0        4.16        1.76    
PRN01  7.0    83.1        37.6        54.0        5.00        2.58    
PRN02  7.0    79.7       -447.        54.0        4.60        2.57    
PRN03  6.6    81.5        91.8        54.4        5.15        2.16    
PRN04  6.9    84.5        7.55        53.0        5.00        2.21    
PRN05  6.9    82.0        132.        49.7        4.74        2.50    
PRN06  6.7    81.1       -.178        50.9        5.16        2.11    
PRN07  6.7    81.6        767.        54.0        4.87        2.41    
PRN09  7.0    80.5       -26.9        52.5        4.62        2.36    
PRN10  6.9    78.4        17.7        53.7        5.00        2.29    
PRN14  7.0    81.5        25.9        51.4        5.00        2.40    
PRN15  7.0    3.16        515.        54.2        4.86        2.53    
PRN16  5.9    80.1        45.7        55.8        4.85        2.26    
PRN17  7.0    80.8       -171.        54.0        5.00        2.27    
PRN18  6.8    83.8        10.2        52.8        5.00        2.12    
PRN19  7.0    83.5        363.        53.4        4.74        2.14    
PRN21  7.0    79.8        18.5        51.8        5.15        2.32    
PRN22  7.0    84.1        42.3        55.0        5.00        2.17    
PRN23  7.0    83.2        8.87        53.5        5.16        2.42    
PRN24  7.0    92.3        745.        53.8        4.87        2.28    
PRN25  7.0    80.8       -6.73        50.1        5.00        2.32    
PRN26  6.8    82.6       -77.1        54.9        5.00        2.15    
PRN27  7.0    81.3        15.4        52.1        4.87        2.26    
PRN29  7.0    81.3        49.7        52.6        4.87        2.73    
PRN30  7.0    81.7       -21.4        49.9        4.61        2.35    
PRN31  6.6    80.0        .705        54.4        5.00        2.32    
_______________________
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  1 18   98  1 19   98  1 20   98  1 21   98  1 22   98  1 23   98  1 24
prn   3d rss (cm)
  1     232        451        459        196        484        417        363   
  2     172        292        289        377        382        359        208   
  3     419        466        393        560        599        234        284   
  4     558        360        153        496        695        478        287   
  5     175        222        267        270        149        212        283   
  6     677        619        536        615        562        422        661   
  7     824        761        502        298        377        369        447   
  8     451        322        233        437                             1197   
  9     319        294        394        251        300        342        318   
 10     544        317        512        601        484        318        401   
 14     940        768        650       1635       1688       1431       1029   
 15     257        324        656        425        432        261        505   
 16    1724       1013        843        919        619        769              
 17     368        646        872        355        663        710        647   
 18     389        508        382        461        483        500        455   
 19     274        402        163        225        308        729        296   
 21     384        375        452        310        278        345        246   
 22     384        727        608        816        377        467        694   
 23     844        956        557        676        500        408        464   
 24     265       1203       2066        221        337        457        456   
 25     258        224        330        320        208        189        217   
 26     635        214        611        380        284        307        179   
 27     258        230        403        271        282        336        264   
 29     218        435        192        413        282        571        255   
 30     235        148        168        138        382        212        297   
 31     544        714        653        366        502        305        456   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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