Subject: [IGSREPORT-536] JPL report
From: [email-masked]
Date: 11 OCT 1993 15:02:53

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IGS Electronic Report     11-OCT-1993 15:02:53       Message Number 536
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From: [email-masked]

Submitted by

D C Jefferson, J F Zumberge, G Blewitt, M B Heflin, F H Webb

all at the Jet Propulsion Laboratory, California Institute of Technology, 
Pasadena, CA  91109.

The following files have been posted on BODHI (for access to BODHI contact
[email-masked]):

______________________________________________________________________________
filename               contents
______________________________________________________________________________
jpl07157.sum           This text file.
jpl07157.erp           Earth rotation parameters for GPS week 715.
jpl07157.sp1           GPS ephemerides for GPS week 715, sp1 format.
jpl07157.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

Anti-spoofing was turned on for days 260-263 and 267-271 (Sep 17-20, 24-28).
Our analyses of days 262, 263, 267 and 268 were done using our new A-S strategy;
see jpl07147.sum for details.

According to the file gpsn3.txt obtained from tycho.usno.navy.mil, PRN23/GPS23
was scheduled unusable on day 263 (Sep 20) from 09:00 UT for up to 16 hours for
repositioning.  We have therefore deweighted data from this satellite for this
day's processing.

Also, according to gpstd.txt (similarly obtained), PRN05/GPS35 was launched
on Aug 30, 1993 (day 242).  Tracking and broadcast ephemeris data were available
as early as Sep 23 (day 266), however, we have chosen to exclude data from this
satellite for this week's analysis.

Data from WETT (Wettzell, Germany) were excluded from the analysis of day 268
(Sep 25); this site's data were not well modelled on this day.

WARNING: Data from PRN23/GPS23 have been deweighted for day 263 (Sep 20).
WARNING: Data from PRN05/GPS35 have been excluded for the entire GPS week 715.
WARNING: Data from WETT have been excluded for day 268 (Sep 25).

JPL LODR TABLE                               GPS week 715 (1993 Sep 19 - Sep 25)
  MJD       LODR     +/-
          (ms/day)
 49249.5    2.41     0.06
 49250.5    2.39     0.06
 49251.5    2.41     0.05
 49252.5    2.39     0.05
 49253.5    2.44     0.05
 49254.5    2.25     0.06
 49255.5    2.39     0.06
END LODR TABLE

NOTE: In the following table, UT1R-UTC are the assumed nominal values from
IERS Bulletin-B predicts; estimated LODR values are given in the previous
table. See IGS Mail Message 97 for details.

JPL UTPM TABLE                               GPS week 715 (1993 Sep 19 - Sep 25)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49249.5  -.09568   .35167   .46710  .00020  .00023  .00000  .0 -.02  .00  .00  41 24  0
 49250.5  -.09594   .35240   .46511  .00019  .00020  .00000  .0 -.03  .00  .00  41 24  0
 49251.5  -.09601   .35321   .46309  .00013  .00014  .00000  .0  .05  .00  .00  42 24  0
 49252.5  -.09623   .35460   .46107  .00013  .00014  .00000  .0  .05  .00  .00  42 24  0
 49253.5  -.09640   .35632   .45903  .00014  .00015  .00000  .0  .09  .00  .00  42 24  0
 49254.5  -.09481   .35636   .45697  .00020  .00021  .00000  .0 -.04  .00  .00  42 24  0
 49255.5  -.09537   .36116   .45491  .00019  .00020  .00000  .0  .01  .00  .00  39 24  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 715:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 715 (1993 Sep 19 - Sep 25)
      93  9 19   93  9 20   93  9 21   93  9 22   93  9 23   93  9 24   93  9 25
prn   3d rss (m)
  1       0.44       0.15       0.14       0.20       0.56       0.63       0.84
  2       0.63       0.41       0.36       0.22       0.57       1.29       0.88
  3       0.77       0.43       0.34       0.34       0.41       0.82       1.60
  7       0.43       0.29       0.36       0.37       0.65       0.72       1.56
  9       0.29       0.33       0.23       0.11       0.39       0.41       0.61
 12       0.33       0.37       0.28       0.29       0.64       0.81       1.02
 13       0.37       0.22       0.21       0.21       0.81       0.74       1.14
 14       0.70       0.42       0.32       0.23       0.62       2.32       1.40
 15       0.50       0.25       0.17       0.27       0.78       1.26       0.83
 16       1.36       0.58       0.26       0.29       0.92       1.95       2.45
 17       0.87       0.28       0.23       0.12       0.46       0.85       0.92
 18       0.80       0.35       0.35       0.39       0.40       1.10       1.84
 19       0.50       0.46       0.34       0.59       0.63       0.72       1.51
 20       0.65       0.24       0.22       0.20       0.75       1.59       1.01
 21       0.31       0.30       0.12       0.18       0.45       0.91       0.60
 22       1.04       0.60       0.42       0.37       0.74       1.46       1.55
 23    3371.97   #2510.13    1063.54       0.26       0.26       1.43       0.48
 24       1.18       0.96       0.27       0.25       0.48       0.87       4.57
 25       0.57       0.23       0.19       0.25       0.56       3.28       3.18
 26       0.91       0.38       0.19       0.14       0.39       0.68       1.96
 27       0.57       0.69       0.35       0.28       0.65       1.52       1.31
 28       0.16       0.30       0.25       0.19       0.21       0.80       1.02
 29       0.32       0.39       0.42       0.33       0.47       2.23       0.86
 31       0.65       0.28       0.21       0.24       0.27       0.81       0.90
_______________________
#Indicates deweighted satellite.
END ORBIT REPEATABILITY 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
      93  9 19   93  9 20   93  9 21   93  9 22   93  9 23   93  9 24   93  9 25
prn   3d rss (m)
  1       0.0        5.8        6.6        7.3        7.8        7.8        8.0 
  2      15.3       15.1       12.5       11.4       10.3       11.1       13.1 
  3       4.9        4.3        4.4        4.4        4.88       6.4        7.1 
  7       8.2        9.6       12.5        8.2        5.7        6.0        7.8 
  9       2.6        4.4        9.1        4.3       12.2        9.7        6.4 
 12       4.0        3.8        3.6        3.0        3.0        4.1        4.6 
 13       8.4        4.0        7.2        5.4        6.2        5.7        0.0 
 14       5.4        4.4        4.9        4.3        4.5        4.8        4.3 
 15       4.5        2.9        5.9        6.2        5.3        4.6        5.4 
 16      11.0       14.2        8.0       10.2       12.0       11.3       10.6 
 17       7.8        5.2        3.9        6.3        5.2        3.6        3.9 
 18      10.7        9.6        7.9        7.9        8.5        8.8       10.9 
 19       4.4        5.5        6.2        5.1        5.4        5.8        7.2 
 20       4.5        7.0        6.9        5.6        5.2        4.9        4.6 
 21       7.7        5.8        7.8       11.2        6.5        6.6        7.7 
 22      10.6        9.3        6.1        7.9        7.5        9.6       14.1 
 23       5.1    #1762.2        7.1        3.4        3.1        4.7        8.0 
 24      11.3        9.3        8.6        8.8       12.0        6.6        8.0 
 25       3.9        4.7        5.3        5.3        5.1        5.7        5.4 
 26       4.8        5.0        3.5        4.5        4.1        4.3        4.5 
 27       6.6        7.5        5.1        5.3        6.5        7.3        9.4 
 28       2.8        3.5        3.9        4.1        3.0        3.6        4.1 
 29       6.6        6.5        6.8        6.2        6.5        7.4        7.5 
 31       5.1        5.2        6.6        6.0       10.1       10.4        6.9 
_______________________
#Indicates deweighted satellite.
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

The following tables, as explained in IGS Report Nos. 99 and 295, indicate the
amount of global network tracking data used in this week's analysis:

JPL SITE SUMMARY TABLE (no. stations)        GPS week 715 (1993 Sep 19 - Sep 25)
      93  9 19   93  9 20   93  9 21   93  9 22   93  9 23   93  9 24   93  9 25
Fiducials 6.8        7.2        8.6        8.6        8.0        7.0        7.3
Total    32.4       34.1       40.9       41.5       38.3       33.9       32.1
END SITE SUMMARY TABLE

JPL GROUND STATION INCLUSION TABLE           GPS week 715 (1993 Sep 19 - Sep 25)
      93  9 19   93  9 20   93  9 21   93  9 22   93  9 23   93  9 24   93  9 25
site    % data
ALBH       93         92         98        108        100         93         94
ALGO*      85         89        110        110        100         89         96
BRMU       85         90         89         71         99         96         71
DRAO       91         91        109        112        103         95         97
FAIR*      77         93        113        116        106         93         87
FORT       75         90         78         95         97         65         92
GOLD       59         81         96         97         90         78         83
GRAZ       94         91        108        107        100         83          0
HART*      75         83        105        107         97         82         91
HERS       92         89        106        106         96         90         90
HOBA       67         91        103        105         89         84         89
JPLM       93         90        106        106         96         93         93
KIRU       89         89         98         98         90         76         84
KOKB*      94         93        108        107         97         89         89
KOSG       93         90        107        106        100         82          0
KOUR       88         91        112        114        103         88         92
MADR*      85         80        101         96        100         90         90
MASP       82         74        103        109        102         79         84
MATE       82         84         96         96         90         81         84
MCMU       87         99        115        117        107         93         96
MDO1       89         79         96         98         90         84         86
METS       85         90        107        108        102         88         94
NLIB       90         89         99        100         86         72         54
NYAL       96         99        109        109         98         78         88
ONSA       95         91        110        110        103         95         97
PIE1       74         69         87         88         77         74         76
PINY        0         72         90         91         82         82         75
QUIN       90         83         96         95         87         79         81
RCM4       97         92        111        112        101         95         99
SANT*      95         94        105        105         96         87         91
STJO       57         83        107        108         99         89         84
TAIW       78         77         88         90         82         76         79
TIDB       34          0         75        105         97         87         91
TROM*      88         94        113        113        107         87         95
USUD       77         76         90         87         73         63         61
VNDP       95         91        109        108         98         91         92
WEST       81         86        108        110         95         89         92
WETT       91         89        102        106         97         85          0
YAR1*      78         92        108        107         97         86         92
YELL       64         93        114        114        104         82         82
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE