Subject: [IGSREPORT-3162] Wk 0878 JPL Analysis Report
From: D C Jefferson
Date: Fri, 15 Nov 1996 16:20:18 PST

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IGS Electronic Report    Fri Nov 15 16:20:18 PST 1996      Message Number 3162
******************************************************************************

Author: D C Jefferson
Subject: Wk 0878 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0878 (DAYS 308-314, DATES 1996 Nov 03 - Nov 09)
******************************************************************************

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/0878.  These files have also been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl08787.sum         This text file.
jpl08787.erp         Earth rotation parameters for GPS week 878.
jpl08787.snx         Ground station coordinates for GPS week 878, SINEX format.
jpl0878[0-6].sp3     GPS ephemerides for GPS week 878, sp3 format.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 18.0 cm

Since GPS week 878, we have been heavily deweighting data from PRN10 and
PRN30.  Beginning this week, we weight data from both satellites normally.
Data from PRN10 appears to still be mismodeled, particularly on day 311,
and we have chosen to exclude its solution from this day's orbit product
(jpl08783.sp3).

According to the file nanu1996.mes obtained from the IGS CBIS, PRN28 is
unusable for an indefinite period beginning day 309.  Data from this satellite
were used only in the analyses of this and the previous day, 308.

Beginning this week, we add three new candidate stations.  As with most sites,
these are 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)
DUBO (Lac du Bonnet, Canada)     -417603.4463  -4064529.8923   4881432.3754
OBER (Oberpfaffenhofen, Germany) 4186556.3037    835029.2732   4723762.6366
RCM6 (Richmond FL, USA)           961334.7807  -5674074.1839   2740535.1463

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 FORT, WETT excluded day 308.
WARNING: Data from FORT, MEDI, WINT, YAR1, ZWEN excluded day 309.
WARNING: Data from SANT excluded day 310.
WARNING: Data from NYAL, SANT excluded day 311.
WARNING: Data from TROM excluded day 312.
WARNING: Data from ASC1, MADR, MAS1 excluded day 313.
WARNING: Data from TROM excluded day 314.

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 878 (1996 Nov 03 - Nov 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
50390.50  18724  12805    -3692  2008    3    4     8      8 37 10 26 -226 -293 
50391.50  18385  12568    -5739  2087    3    3     8      8 37 11 26 -232 -228 
50392.50  18043  12375    -7852  2139    3    3     8      8 37 11 25 -237 -231 
50393.50  17628  12223    -9993  2143    3    3     8      8 37 11 25 -331 -166 
50394.50  17227  12020   -12131  2132    3    3     9      9 37 11 25 -289 -234 
50395.50  16828  11818   -14254  2115    4    4     9      9 37 10 25 -294 -240 
50396.50  16442  11625   -16329  2035    3    3     8      8 37 11 25 -248 -223 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 878:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 878 (1996 Nov 03 - Nov 09)
      96 11  3   96 11  4   96 11  5   96 11  6   96 11  7   96 11  8   96 11  9
prn   3d rss (m)
  1       0.22       0.22       0.20       0.21       0.28       0.29       0.31
  2       0.17       0.12       0.15       0.20       0.25       0.15       0.14
  3       0.24       0.22       0.33       0.37       0.35       0.18       0.21
  4       0.14       0.12       0.18       0.16       0.26       0.13       0.10
  5       0.14       0.12       0.19       0.12       0.21       0.14       0.09
  6       0.18       0.21       0.14       0.15       0.15       0.10       0.17
  7       0.20       0.15       0.17       0.16       0.22       0.20       0.21
  9       0.19       0.11       0.12       0.12       0.18       0.18       0.18
 10       1.28       0.79       0.79       0.92       0.82       0.67       0.64
 14       0.11       0.17       0.25       0.56       0.44       0.14       0.19
 15       0.28       0.21       0.17       0.24       0.28       0.12       0.15
 16       0.08       0.15       0.15       0.12       0.09       0.15       0.06
 17       0.12       0.12       0.12       0.14       0.33       0.21       0.13
 18       0.23       0.14       0.27       0.25       0.35       0.12       0.13
 19       0.23       0.20       0.25       0.31       0.20       0.15       0.12
 21       0.14       0.19       0.19       0.12       0.21       0.12       0.20
 22       0.12       0.09       0.10       0.17       0.20       0.12       0.09
 23       0.12       0.14       0.14       0.10       0.19       0.20       0.28
 24       0.18       0.16       0.26       0.30       0.25       0.18       0.18
 25       0.18       0.20       0.18       0.22       0.18       0.17       0.20
 26       0.18       0.23       0.15       0.16       0.16       0.23       0.14
 27       0.22       0.19       0.18       0.23       0.18       0.11       0.12
 28       0.15       0.1                                                        
 29       0.11       0.12       0.30       0.82       0.63       0.24       0.12
 30       1.10       0.40       0.37       0.42       0.43       0.37       0.48
 31       0.13       0.11       0.08       0.14       0.19       0.15       0.24
_______________________
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 878 (1996 Nov 03 - Nov 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*  6.9    .           .           48.9        4.62        3.06    
ANKR   2.8    101.       -.366        54.0        4.39        3.03    
AREQ   2.0    96.3       -.375        39.5        5.52        2.15    
ASC1   4.8    123.       -.373        85.2        4.62        1.55    
BAHR   6.0    .369        266.        49.1        4.87        3.54    
BOGT   4.6    130.       -.372        55.2        6.07        2.22    
BRAZ   3.9    156.       -.411        60.8        5.77        2.28    
BRMU   2.0    112.       -.421        39.0        5.00        2.82    
BRUS   7.0    .169        8.73        58.6        5.18        2.76    
CASA   7.0    13.4        105.        38.2        4.83        2.66    
CHAT   7.0    102.       -.386        77.3        5.30        2.88    
CRO1   1.9    180.       -.403        41.6        7.11        2.44    
DGAR   7.0    172.       -.396        70.9        5.30        1.85    
EISL   6.9    .701e+07   -.140e+05    43.1        6.15        2.99    
FAIR*  7.0    37.2       -.571        32.4        4.95        2.31    
FLIN   2.0    80.4       -.425        56.3        4.00        2.99    
FORT   2.9    .120       -.416        49.7        7.08        3.01    
GOL2*  7.0    65.2       -.439        51.9        5.75        2.99    
GUAM   4.6    110.       -.363        52.0        10.7        2.65    
HKLO    .9    .289e+06    512.        49.0        6.00        3.24    
HRAO   6.9    118.       -.391        52.6        5.03        2.75    
IISC   7.0    82.4       -.390        71.0        5.30        2.10    
IRKT   2.9    10.8       -.167        44.7        4.71        2.76    
KERG   3.9    155.        11.8          .         5.28        2.74    
KIRU   3.0    6.86       -.103        54.0        6.66        2.29    
KIT3   2.9    114.       -.409        52.7        4.33        3.13    
KOKB*  7.0    .128        .373        62.6        6.82        3.21    
KOSG*  5.8    2.81       -.546        38.7        5.07        2.32    
KOUR   2.0    3.58        .614          .         9.50        1.85    
KWJ1   7.0    76.7       -.393        53.5        7.92        1.88    
LHAS   6.7    488.       -.411        70.5        5.15        2.56    
MADR*  5.7    2.06       -.528          .         4.85        2.16    
MALI    .9    39.6       -159.          .         7.00        2.19    
MAS1   5.8    .388e+04   -43.7        43.0        4.52        2.70    
MCM4   7.0    100.       -.392        47.2        4.87        1.73    
MKEA   5.9    .956e-01   -.589        45.8        6.52        2.61    
MOIN   1.0    85.7       -.456        63.0        11.0        1.86    
OHIG   5.1    .173e+05   -1.97        46.9        4.52        1.17    
PAMA   3.9    183.       -.364          .         9.50        2.27    
PERT   6.9    2.56       -1.27        50.9        4.74        2.84    
POL2    .9    80.8       -.378        43.0        5.00        2.79    
REYK   4.0    83.1       -.427        64.5        6.52        2.14    
SANT*  4.8    162.        .958e-01    40.7        5.00        2.34    
STJO   4.0    33.5       -.401        35.1        3.78        2.43    
THU1   7.0    71.0       -.385        42.5        5.62        2.65    
TID2*  7.0    19.5       -.356        40.9        5.45        3.01    
TROM*  3.8    6.55        22.2          .         5.06        1.86    
USUD   7.0    17.2        1.99        34.9        5.79        2.86    
WTZR*  6.1    .134        1.01        60.0        4.18        2.59    
WUHN   3.6    5.04       -412.        44.6        5.00        3.00    
YAR1*  4.9    .266e+06    74.2          .         4.84        2.34    
YELL*  7.0    .177       -1.98        40.0        4.48        2.01    
PRN01  7.0    81.2        6.02        55.0        5.46        2.31    
PRN02  7.0    81.6       -306.        55.3        5.45        2.44    
PRN03  7.0    80.7        68.1        52.2        5.29        2.57    
PRN04  6.8    82.1        52.5        52.1        5.87        2.02    
PRN05  7.0    81.7        66.3        53.0        5.60        2.54    
PRN06  7.0    82.1        2.76        48.2        5.15        2.71    
PRN07  7.0    81.8        730.        54.0        5.59        2.34    
PRN09  6.6    78.9       -16.8        55.6        5.46        2.22    
PRN10  7.0    81.8        303.        51.9        5.89        2.37    
PRN14  7.0    84.6        15.4        51.5        5.47        2.45    
PRN15  6.8    3.50        357.        58.6        5.76        2.28    
PRN16  7.0    83.1        31.5        51.1        5.65        2.59    
PRN17  6.8    81.4       -131.        51.9        5.64        2.26    
PRN18  7.0    82.8        15.3        45.9        5.79        2.49    
PRN19  6.8    82.1        179.        52.0        6.06        2.44    
PRN21  7.0    82.0        6.78        55.0        5.30        2.28    
PRN22  7.0    81.5        348.        50.3        5.73        2.56    
PRN23  7.0    81.2        5.46        52.5        5.31        2.46    
PRN24  6.8    82.7        345.        51.8        6.59        2.15    
PRN25  6.7    81.4       -4.23        48.4        5.89        2.25    
PRN26  7.0    81.2       -65.0        51.0        5.16        2.50    
PRN27  6.8    77.9        7.16        51.9        6.15        2.72    
PRN28  1.7    2.40        115.        59.8        5.00        2.84    
PRN29  7.0    80.0        2.31        46.8        6.24        2.81    
PRN30  7.0    80.4       -10.0        51.9        6.00        2.71    
PRN31  7.0    81.5        42.9        54.4        5.62        2.28    
_______________________
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
      96 11  3   96 11  4   96 11  5   96 11  6   96 11  7   96 11  8   96 11  9
prn   3d rss (m)
  1       5.5        4.8        5.3        6.1        6.0        6.2        4.0 
  2       4.8        2.7        3.0        4.0        3.3        3.3        3.1 
  3       4.2        3.2        3.7        3.5        3.4        3.7        4.5 
  4       5.9        4.6        4.0        4.5        5.5        5.1        4.2 
  5       3.7        3.5        3.0        3.8        3.6        3.1        3.1 
  6       6.4        6.5        6.6        6.2        5.8        5.6        6.4 
  7       4.3        4.6        4.6        4.1        4.3        5.2        5.5 
  9       3.5        2.1        2.3        2.1        3.0        3.7        4.4 
 10       5.7        6.6        7.2        7.3        6.5        6.8        4.6 
 14       5.5       27.6        3.6        3.9        5.0        7.8       13.7 
 15       4.6        4.2        4.0        4.5        5.0        4.8        5.0 
 16       2.6        2.5        7.2       10.7        4.9        4.6        5.2 
 17       3.9        3.6        3.6        4.8        3.6        4.9        5.8 
 18       3.9        3.1        2.9        1.8        2.3       11.9        4.0 
 19       2.5        2.1        2.2        7.6        5.0        3.2       16.6 
 21       2.9        2.2        3.1        3.4        1.9        2.4        5.8 
 22       5.7        6.9        8.0        8.7        7.6        8.2        6.4 
 23       2.5        1.9        2.6        2.8        1.9        1.7        2.0 
 24       4.9        5.2        5.5        5.4        5.1        5.4        6.3 
 25      10.7       10.3        8.8        8.7        9.4        9.8        9.4 
 26       4.5        5.6        5.3        3.6        2.9        3.3        5.6 
 27       8.7        7.1        7.4        8.8        8.1        9.4        9.0 
 28       4.0        2.9                                                        
 29       4.8        3.5        2.7        3.9       21.0        4.5        2.4 
 30       4.8        5.0        5.5        5.4        5.3        5.4        4.5 
 31       2.6        2.4        3.5        2.4        2.8        2.2        2.6 
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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