Subject: [IGSREPORT-593] JPL0720.SUM
From: [email-masked]
Date: 12 NOV 1993 16:34:57

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IGS Electronic Report     12-NOV-1993 16:34:57       Message Number 593
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From: [email-masked]
Subj: JPL0720.SUM
-------------------------------

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JPL ANALYSIS REPORT   GPS-WEEK 0720 (DAYS 297-303, DATES 24-10-93 TO 30-10-93)
******************************************************************************

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
______________________________________________________________________________
jpl07207.sum           This text file.
jpl07207.erp           Earth rotation parameters for GPS week 720.
jpl0720[0-6].sp1       GPS ephemerides for GPS week 720, sp1 format.
jpl0720[0-6].sp3        "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

Anti-spoofing was turned on for days 302 and 303 (October 29, 30). Our analyses
of these days were done using our A-S strategy (data acquired in cross-
correlated mode were inadvertently omitted for day 302); see jpl07147.sum for
details.

According to IGS Mail Message #358, a change in receivers occured at ALBH
(Alberthead, Canada) on day 298 (October 25).  We have chosen to delete data
from this site for the analysis of 298, and deweight it on day 299 (October 26).
Additionally, tracking data from HOBA (Hobart, Tasmania) caused an excessive
number of outliers in our solutions beginning with day 298.  We have therefore
deweighted data from this site for the analyses of days 298-301, and deleted
them for days 302 and 303.

An atypically small amount of broadcast ephemeris data was available for PRN09/
GPS39 on day 303. This is indicated by the (n/a) in the Broadcast Ephemeris
Comparison table for this satellite and day. Also, the larger-than-normal
values of orbit repeatabilty for PRN's 20 and 31 on day 303 are due to de-
weighting of data from these satellites on the following day.

WARNING: Data from ALBH have been excluded for days 298 and 303 (October 25,             and 30). Data from this site have been deweighted for day 299 (Oct 26).
WARNING: Data from HOBA have been excluded for days 302 and 303 (Oct 29, 30)
         and deweighted for days 298-301 (October 25-28).

JPL LODR TABLE                               GPS week 720 (1993 Oct 24 - Oct 30)
  MJD       LODR     +/-
          (ms/day)
 49284.5    2.88     0.05
 49285.5    2.69     0.05
 49286.5    2.66     0.05
 49287.5    2.64     0.05
 49288.5    2.69     0.05
 49289.5    2.71     0.02
 49290.5    2.68     0.02
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 720 (1993 Oct 24 - Oct 30)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49284.5  -.07767   .41174   .37218  .00012  .00012  .00000  .0  .04  .00  .00  39 25  0
 49285.5  -.07659   .41308   .36785  .00012  .00013  .00000  .0  .03  .00  .00  38 25  0
 49286.5  -.07573   .41502   .36541  .00012  .00012  .00000  .0  .03  .00  .00  40 25  0
 49287.5  -.07459   .41677   .36297  .00012  .00012  .00000  .0  .02  .00  .00  38 25  0
 49288.5  -.07393   .41836   .36052  .00013  .00013  .00000  .0  .03  .00  .00  36 25  0
 49289.5  -.07334   .42035   .35808  .00013  .00014  .00000  .0  .08  .00  .00  37 25  0
 49290.5  -.07391   .42130   .35563  .00010  .00011  .00000  .0  .04  .00  .00  35 25  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 720:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 720 (1993 Oct 24 - Oct 30)
      93 10 24   93 10 25   93 10 26   93 10 27   93 10 28   93 10 29   93 10 30
prn   3d rss (m)
  1       0.17       0.17       0.15       0.14       0.21       1.98       1.45
  2       0.26       0.27       0.21       0.23       0.60       0.67       0.70
  3       0.42       0.43       0.35       0.49       0.42       0.32       0.58
  5       0.31       0.30       0.20       0.18       0.14       1.07       1.03
  7       0.34       0.36       0.34       0.40       0.58       0.89       0.83
  9       0.36       0.54       0.14       0.12       0.40       0.94       0.54
 12       0.17       0.23       0.27       0.44       0.32       0.78       0.30
 13       0.37       0.29       0.21       0.23       0.37       0.41       0.32
 14       0.46       0.35       0.28       0.28       0.19       0.33       0.51
 15       0.38       0.35       0.16       0.32       0.31       0.71       0.33
 16       0.40       0.41       0.36       0.58       0.60       1.40       1.08
 17       0.19       0.41       0.34       0.43       0.23       0.69       0.25
 18       0.36       0.48       0.29       0.32       0.18       0.62       0.74
 19       0.38       0.25       0.17       0.30       0.29       0.65       0.56
 20       0.39       0.28       0.19       0.20       0.19       1.12       5.05
 21       0.14       0.26       0.20       0.23       0.35       0.33       0.57
 22       0.21       0.15       0.25       0.14       0.45       0.54       1.01
 23       0.36       0.47       0.34       0.36       0.33       0.72       1.61
 24       0.36       0.28       0.24       0.33       0.43       0.52       0.38
 25       0.15       0.15       0.10       0.24       0.27       0.85       0.64
 26       0.18       0.21       0.13       0.28       0.36       1.72       1.48
 27       0.23       0.26       0.21       0.23       0.29       0.64       0.69
 28       0.24       0.25       0.36       0.26       1.13       1.74       1.83
 29       0.17       0.19       0.10       0.11       0.26       0.56       0.72
 31       0.38       0.47       0.45       0.40       0.45       1.23       7.14
_______________________
#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 10 24   93 10 25   93 10 26   93 10 27   93 10 28   93 10 29   93 10 30
prn   3d rss (m)
  1      10.3        9.9       10.9       11.6       12.1       11.3       12.0 
  2       7.4        8.3        8.1        6.6        7.8        9.5        4.2 
  3       8.3        8.1        9.0        9.8        9.4       10.1        9.9 
  5      12.6       13.9       16.2       17.0       17.3       17.8       17.9 
  7       5.5        7.0        7.3        8.1        6.8        6.3        6.5 
  9      38.8       44.1       49.6       56.0       65.1       72.8       (n/a)
 12       2.8        2.4        2.3        3.2        3.5        3.7        4.4 
 13       5.4        5.1        5.4        5.2        6.8        8.7        9.9 
 14       3.4        3.9        6.2        5.3        3.7        3.6        0.0 
 15       4.2        4.7        4.1        5.7        5.6        3.3        2.7 
 16       6.0        5.6        6.0        6.0        6.3        7.6        7.9 
 17       2.5        2.8        2.9        4.6        3.5        2.7        2.4 
 18       9.8       12.5        7.4        6.8       13.8       11.4       10.8 
 19       5.8        5.4        6.8        4.5        4.1        7.0        5.1 
 20       6.2        5.8        4.9        5.7        5.7        5.8        4.9 
 21       5.9        3.1        4.5        2.7        3.3        3.3        2.9 
 22       5.3        4.7       10.0       10.8        8.2        5.7        7.4 
 23       1.5        2.6        2.7        2.7        3.0        2.5        2.7 
 24       8.2        8.7        7.5        7.2        8.0       10.0       12.6 
 25       9.1        7.0        4.7        5.2        6.9        6.8        7.2 
 26       7.2        6.5        6.2        4.5        3.3        4.8        4.1 
 27       8.1        7.7        6.4        7.4        7.2        6.3        6.3 
 28       3.4        4.2        7.4        9.1        7.3        8.4        6.6 
 29       8.6        8.3        9.9        9.5        8.9        8.1        7.4 
 31       8.1        5.7        5.8        7.0        9.1       14.4       13.2 
_______________________
#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 720 (1993 Oct 24 - Oct 30)
      93 10 24   93 10 25   93 10 26   93 10 27   93 10 28   93 10 29   93 10 30
Fiducials 8.5        8.8        9.0        8.5        8.9        6.2        7.1
Total    40.1       38.9       40.2       37.9       35.0       23.6       27.8
END SITE SUMMARY TABLE

JPL GROUND STATION INCLUSION TABLE           GPS week 720 (1993 Oct 24 - Oct 30)
      93 10 24   93 10 25   93 10 26   93 10 27   93 10 28   93 10 29   93 10 30
site    % data
ALBH      111          0       #106        107        110         69          0
ALGO*     112        112        112         67        100         68         78
BRMU      110         84         93        106         89         38         80
DRAO      101        109         35         94          0         58         82
FAIR*      97        102        118        118        119         76         91
FORT      117         86         56        116        109         65         81
GODE      107        100         98         95         97         62         86
GOLD      101        102         99        101        101         64         68
GRAZ      107        108        109         66         86         39          0
HART*      91        109        111        111        111         80         93
HERS      111        111        113        100          0          0          0
HOBA      105       #107       #108       #108        #97          0          0
JPLM      111        111        110        112        112         67         35
KIRU      104        107        101          0          0         45         92
KOKB*     106        107        106        108        108         76         81
KOSG      110        113        113        112        112         80         96
KOUR      110        110        112        108        109         63         70
MADR*     110        108        110        111        109         79         89
MASP      110        113        115        114        115         78         89
MCMU      115        120        114        107         78          0         11
MDO1      111        108        111        111        110         66         74
METS      113        113        112        113        112         81         98
NLIB      106        102        107        104        102         62         58
NYAL      118        121        121        109        107         87         90
ONSA      111        110        110         99         34         74         89
PIE1       86         94         98          0          0         24         80
PINY      110        112        110         88         94         61         50
QUIN       96        101        105         99        101         57         67
RCM4        0          0          0          0          0         55         86
SANT*     111        113        113        112        112         78         88
STJO      113        109        110        110        113         72         60
TAIW        0          0        101        111        111         84         90
TIDB      114        115        115        114         90         77         96
TROM*     115        119        119        118        118         74         96
USUD      108        108        103        102        100         75         84
VNDP      111        111        110        112        111         69         89
WEST      112        110        111        103         91          0         81
YAR1*     112        113        111        105        112         87         98
YELL      117        116        117        118        117         73         83
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE