Subject: [IGSREPORT-2400] Wk 0838 JPL Analysis Report
From: D C Jefferson
Date: Mon, 12 Feb 1996 14:56:00 PST

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IGS Electronic Report    Mon Feb 12 14:56:00 PST 1996      Message Number 2400
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Author: D C Jefferson
Subject: Wk 0838 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0838 (DAYS 28-34, DATES 1996 Jan 28 - Feb 03)
******************************************************************************

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/0838.  These files have also been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl08387.sum         This text file.
jpl08387.erp         Earth rotation parameters for GPS week 838.
jpl08387.snx         Ground station coordinates for GPS week 838, SINEX format.
jpl0838[0-6].sp3     GPS ephemerides for GPS week 838, sp3 format.
______________________________________________________________________________

Mean Orbit Repeatability (see table below): 19.2 cm

As of day 030, we have made a slight change in our latest global site
selection algorithm (see jpl08347.sum).  After choosing a suitable reference
clock station, the eight sites selected are those which exhibit highly stable
clock behavior.  These are usually sites which use an H-maser frequency
reference, but in our new scheme, they are not forced to be so; other clock
standards are allowed if their daily performance meets our selection criteria.

Also beginning day 030, we regularly exclude data from PRN12 from our analyses.

According to the file nanu1996.mes obtained from the IGS CBIS, PRN20 was
unusable on day 032 for maintenance/repositioning.  Data from this satellite
did not meet our convergence criteria on this or the previous day (031), and
were excluded from both the analyses of both 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: PIE1 (not ALGO) used as reference clock on days 028-030, 033, and 034.
WARNING: Data from PRN20 excluded on days 031 and 032 due to a maneuver.
WARNING: Data from BRIB, LAMA, MAS1, MATE, SEY1, TID2, ZIMM excluded day 028.
WARNING: Data from BRIB, DAM1, GOLD, SEY1, TID2 excluded day 029.
WARNING: Data from PRN12 excluded days 030-034.
WARNING: Data from DAM1, KELY, MALI, MATE, WETT excluded day 030.
WARNING: Data from DAM1, KRAK, MATE, TROM, WETT excluded day 031.
WARNING: Data from ANKR, BRAN, KRAK, MATE, NYAL, WETT excluded day 032.
WARNING: Data from BRAN, NYAL excluded day 033.
WARNING: Data from BRAN, IISC, KELY, TROM excluded day 034.
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 838 (1996 Jan 28 - Feb 03)
     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
50110.50 -21687  27894   507038  1764    4    5    11     11 37 12 25 -129  373 
50111.50 -21842  28239   505303  1706    4    5    11     11 37 11 25 -129  364 
50112.50 -21975  28564   503579  1742    4    5    11     11 37 11 24 -116  314 
50113.50 -22093  28901   501829  1758    5    6    12     12 37 10 23  -98  322 
50114.50 -22172  29243   500062  1777    5    6    13     13 37 11 23 -104  386 
50115.50 -22230  29668   498233  1881    5    6    13     13 37 11 24  -55  352 
50116.50 -22261  30025   496327  1930    5    5    11     11 37 10 24  -23  369 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 838:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 838 (1996 Jan 28 - Feb 03)
      96  1 28   96  1 29   96  1 30   96  1 31   96  2  1   96  2  2   96  2  3
prn   3d rss (m)
  1       0.21       0.12       0.08       0.09       0.20       0.13       0.17
  2       0.14       0.23       0.15       0.15       0.16       0.09       0.12
  4       0.15       0.18       0.23       0.14       0.12       0.12       0.15
  5       0.06       0.12       0.12       0.12       0.10       0.15       0.15
  6       0.14       0.15       0.18       0.17       0.24       0.17       0.14
  7       0.11       0.06       0.23       0.19       0.18       0.16       0.12
  9       0.16       0.06       0.13       0.07       0.17       0.21       0.17
 12       0.18       0.1                                                        
 14       0.17       0.12       0.14       0.15       0.39       0.47       0.17
 15       0.33       0.23       0.21       0.26       0.44       0.34       0.22
 16       0.22       0.21       0.14       0.20       0.27       0.24       0.18
 17       0.13       0.11       0.12       0.12       0.18       0.15       0.12
 18       0.15       0.24       0.18       0.14       0.22       0.22       0.21
 19       0.22       0.17       0.20       0.14       0.15       0.18       0.08
 20       0.11       0.19       0.2                              0.2        0.18
 21       0.10       0.23       0.17       0.14       0.27       0.30       0.18
 22       0.21       0.19       0.26       0.20       0.26       0.24       0.23
 23       0.43       0.41       0.42       0.47       0.39       0.33       0.27
 24       0.13       0.14       0.19       0.25       0.23       0.15       0.18
 25       0.20       0.10       0.15       0.14       0.38       0.32       0.25
 26       0.11       0.10       0.19       0.22       0.20       0.15       0.09
 27       0.10       0.13       0.13       0.10       0.14       0.15       0.10
 28       0.20       0.19       0.25       0.09       0.15       0.20       0.13
 29       0.18       0.24       0.17       0.12       0.25       0.62       0.20
 31       0.32       0.37       0.24       0.33       0.33       0.30       0.18
_______________________
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 838 (1996 Jan 28 - Feb 03)
 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   7.0    2.99        74.9        39.2        3.00        2.51    
ALGO*  6.8    .250        1.09        37.5        3.88        2.83    
ANKR   1.8    96.9        .813e-01    61.9        4.00        2.28    
AREQ   7.0    85.6        .307        44.5        4.74        1.81    
AUCK   1.0    87.3        .630        39.0        5.00        2.94    
BRMU   5.0    104.        .190        37.8        5.24        2.62    
BRUS   5.0    .208        4.18        59.2        4.21        2.50    
CHAT   5.8    95.8        .265        83.9        5.54        2.54    
CICE   2.0    90.2       -.480        32.1        5.00        2.43    
CRO1   7.0    125.        .313        44.2        6.79        1.96    
EISL   4.9    .716e+07   -.157e+05    40.5        7.00        2.14    
FAI2   7.0    26.2        .244        51.9        4.16        2.19    
FAIR*  6.9    .650e+05    7.04          .         4.00        1.95    
FORT   2.0    .256e+04   -.637        50.5        7.53        3.02    
GODE   1.0    .280        2.61        45.0        4.00        2.68    
GOL2   7.0    .124        .549        50.7        4.50        3.11    
GOLD*  5.9    .182        2.96          .         3.38        2.25    
GUAM   7.0    96.0        .303        48.2        7.06        2.31    
HART*  5.9    29.5       -10.9          .         7.88        1.43    
HARV   2.0    .784e+07    .128e+05    71.6        6.11        2.01    
IISC   4.5    824.        .229        64.9        4.70        2.21    
IRKT   4.9    .327       -.171e-05    47.4        4.22        2.83    
KELY    .6    .148e+04    .668        59.0        8.00        1.40    
KERG   7.0    156.       -612.          .         5.45        2.22    
KIRU   4.0    4.31        12.4        51.5        7.76        2.06    
KIT3   4.8    119.        .181        58.2        4.43        2.95    
KOKB*  7.0    72.5        .721        47.4        5.93        2.53    
LPGS   7.0    .104e+04    .202        69.7        5.95        1.68    
MADR*  6.9    1.34       -.789          .         4.47        2.18    
METS    .8    .261       -5.62        35.0        3.00        2.21    
NLIB   4.0    .801e-01    .205        33.3        3.54        2.41    
NOTO   4.9    .131       -3.24        36.5        4.44        2.93    
OHIG   5.0    .609e+05   -2.05        56.2        4.52        .952    
ONSA   3.0    183.       -.840        36.8        3.00        2.16    
PAMA   5.9    213.        .245          .         10.2        2.06    
PERT   7.0    2.16       -3.89        51.3        4.32        3.20    
PIE1   4.9    .           .           37.0        4.43        2.54    
POTS   1.0    93.5        .645        81.0        4.00        2.71    
SANT*  7.0    .764        .935          .         5.16        1.97    
SEY1   1.0    52.5        .590          .         9.00        2.48    
SHAO   5.8    88.7        .441        51.1        3.86        2.35    
STJO   7.0    2.68        .533        38.2        4.36        2.63    
THU1   2.8    70.1        .622        45.9        4.31        2.72    
TID2   5.0    24.0        .103        40.5        4.63        2.85    
TIDB*  6.9    .231        1.99          .         4.91        2.53    
TMGO   1.0    166.       -.469        38.0        3.00        2.21    
TROM*  3.8    4.67        73.1          .         6.35        1.62    
TSKB   2.0    1.01       -.121e+04    45.0        4.00        2.70    
USUD   5.0    2.62        1.17        34.8        4.22        2.81    
VILL   4.0    736.        1.61        63.2        4.00        2.62    
WETT*  4.0    .111        4.24          .         6.11        2.39    
YAR1*  7.0    10.2        1.16          .         4.32        2.35    
YELL*  7.0    .116       -.711        39.3        4.00        1.98    
ZWEN   2.9    .226e+05    .341        52.3        4.00        2.70    
PRN01  6.7    82.0        529.        48.0        5.47        2.48    
PRN02  6.9    80.8       -228.        48.9        5.15        2.41    
PRN04  6.9    82.2        9.21        47.5        5.44        1.90    
PRN05  6.9    83.0        22.6        47.8        4.87        2.58    
PRN06  6.9    79.5        6.07        46.6        5.00        2.52    
PRN07  6.9    81.4        716.        49.1        5.15        2.24    
PRN09  6.9    82.0       -9.53        50.6        5.00        2.22    
PRN12  2.0    .618e+05   -273.        53.5        5.00        3.02    
PRN14  6.3    82.5        12.8        51.3        5.04        1.82    
PRN15  6.9    3.41        267.        51.9        5.00        1.86    
PRN16  6.7    80.1       -173.        51.8        5.59        2.21    
PRN17  6.9    80.0       -105.        48.5        5.16        2.59    
PRN18  6.8    78.6       -5.89        50.4        5.00        2.14    
PRN19  6.8    78.5        344.        48.1        4.47        2.30    
PRN20  4.9    81.0        3.20        49.5        5.00        2.66    
PRN21  6.6    81.1       -12.6        49.2        5.00        2.41    
PRN22  6.7    82.1        283.        52.3        5.16        2.10    
PRN23  6.6    80.9        6.78        46.0        5.74        2.25    
PRN24  6.9    85.0        160.        49.6        6.03        2.17    
PRN25  6.7    80.2       -.311        48.8        5.15        2.13    
PRN26  6.9    81.3       -143.        48.4        5.15        2.51    
PRN27  6.9    82.4        17.8        47.8        4.47        2.34    
PRN28  6.9    2.13        63.2        58.2        4.46        2.59    
PRN29  6.6    80.6        6.32        46.2        4.87        1.67    
PRN31  6.9    80.6        274.        48.7        5.16        2.46    
_______________________
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  1 28   96  1 29   96  1 30   96  1 31   96  2  1   96  2  2   96  2  3
prn   3d rss (m)
  1       2.5        2.2        2.3        5.4        6.4        7.8        4.0 
  2       6.8        6.1        6.6        9.6        8.2        4.5        6.8 
  4       2.6        2.8        3.9        6.7        5.4        2.6        2.7 
  5       7.7        8.7        7.3        8.2        8.6        6.9        7.8 
  6       6.6        6.1        6.3        8.2        8.4        5.2        4.9 
  7       5.4        5.7        5.4        5.1        6.3        4.3        5.3 
  9       6.4        5.1        3.1        7.8        7.2        3.7        5.7 
 12       2.5        3.7                                                        
 14       5.4        6.8        5.9        7.3       10.5        7.0        9.7 
 15       4.3        3.7        4.7        6.8        6.8        4.9        4.4 
 16       4.0        5.1        4.4       10.1        8.0        4.5        6.3 
 17       3.9        4.1        4.0        6.0        9.0        7.7        4.4 
 18       4.0        5.3        4.2        5.9        7.1        8.2        4.0 
 19       6.9        5.6        4.2        5.1        7.2        3.5        9.2 
 20       5.1        5.5        5.9                             11.2        2.9 
 21       8.3        7.1        7.3        7.6        7.3        8.2       10.2 
 22       4.8        6.2        5.0        5.1        4.8        3.7        5.2 
 23      22.0       16.9       17.0       15.8        8.7       16.0       22.8 
 24       4.0        3.2        3.3        7.4        7.5        4.4        3.1 
 25       7.8        5.6        5.5        6.4        8.2        3.4        4.0 
 26       3.9        3.2        2.8        2.8        4.2        2.3        3.5 
 27       3.9        3.8        3.4        4.0        5.1        3.3        4.2 
 28       4.1        3.5        3.5        4.9        6.9        5.5        4.3 
 29       3.7        4.0        3.9        3.7        6.5        4.1        2.4 
 31       3.0        2.8        3.0        4.1        6.1        3.0        4.9 
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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