Subject: [IGSREPORT-541] JPL0716.SUM
From: [email-masked]
Date: 13 OCT 1993 21:23:02

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IGS Electronic Report     13-OCT-1993 21:23:02       Message Number 541
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From: [email-masked]
Subject: JPL0716.SUM
____________________________________________________________________________

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
______________________________________________________________________________
jpl07167.sum           This text file.
jpl07167.erp           Earth rotation parameters for GPS week 716.
jpl07167.sp1           GPS ephemerides for GPS week 716, sp1 format.
jpl07167.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

Anti-spoofing was on for days and 267-271 (Sep 24-28). Our analyses of days 269
through 271 were done using our A-S strategy; see jpl07147.sum for details.

Beginning this week, we include data from PRN05/GPS35, which was launched on
Aug 30, 1993 (day 242). Following our usual practices, we have deweighted all
data from this satellite for the entire week of analysis.

According to the file gpsn3.txt obtained from tycho.usno.navy.mil, PRN24/GPS24
was scheduled unusable on day 270 (Sep 27) from 14:45 UT for up to 12 hours for
repositioning. As we use a 30-hr. data interval, we have deweighted data from
this satellite for this day AND the following day (271) as well.

Data from GGAO (Greenbelt, MD, USA) and GRAZ (Graz, Austria) were excluded from
all days except day 271. These data were not well modelled for most of week 716.

WARNING: Data from PRN05/GPS35 have been deweighted for the entire GPSweek 716.
WARNING: Data from PRN24/GPS24 have been deweighted for days 270 and 271 (Sep            27 and 28).
WARNING: Data from GGAO and GRAZ have been excluded for all days of week 716             EXCEPT for day 271 (Sep 28).

JPL LODR TABLE                               GPS week 716 (1993 Sep 26 - Oct 02)
  MJD       LODR     +/-
          (ms/day)
 49256.5    2.42     0.06
 49257.5    2.36     0.06
 49258.5    2.40     0.06
 49259.5    2.34     0.05
 49260.5    2.31     0.05
 49261.5    2.35     0.05
 49262.5    2.42     0.05
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 716 (1993 Sep 26 - Oct 02)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49256.5  -.09506   .36218   .45286  .00020  .00021  .00000  .0  .00  .00  .00  40 25  0
 49257.5  -.09489   .36464   .43454  .00019  .00020  .00000  .0 -.01  .00  .00  39 25  0
 49258.5  -.09426   .36601   .43235  .00019  .00019  .00000  .0  .00  .00  .00  39 25  0
 49259.5  -.09434   .36820   .43016  .00013  .00014  .00000  .0  .02  .00  .00  41 25  0
 49260.5  -.09464   .37003   .42795  .00013  .00014  .00000  .0  .01  .00  .00  41 25  0
 49261.5  -.09469   .37197   .42574  .00013  .00015  .00000  .0  .04  .00  .00  40 25  0
 49262.5  -.09408   .37374   .42351  .00013  .00014  .00000  .0  .03  .00  .00  40 25  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 716:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 716 (1993 Sep 26 - Oct 02)
      93  9 26   93  9 27   93  9 28   93  9 29   93  9 30   93 10  1   93 10  2
prn   3d rss (m)
  1       0.61       0.34       0.21       0.09       0.17       0.11       0.17
  2       0.39       0.27       0.30       0.30       0.34       0.37       0.35
  3       1.17       0.51       0.60       0.54       0.33       0.28       0.36
  5      #1.4       #6.67      #3.27      #2.13      #4.24      #4.43     #11.08
  7       1.09       0.68       0.32       0.22       0.30       0.18       0.27
  9       0.38       0.17       0.15       0.26       0.23       0.19       0.31
 12       0.41       0.20       0.14       0.24       0.24       0.17       0.31
 13       0.95       0.46       0.40       0.42       0.35       1.51       0.43
 14       0.50       0.18       0.21       0.23       0.24       0.24       0.36
 15       0.33       0.38       0.22       0.12       0.15       0.26       0.15
 16       1.07       0.19       0.28       0.27       0.46       0.47       0.28
 17       1.06       0.58       0.30       0.22       0.17       0.18       0.26
 18       0.66       0.18       0.30       0.20       0.20       0.24       0.18
 19       0.74       0.56       0.19       0.49       0.57       0.41       0.23
 20       0.69       0.73       0.35       0.30       0.26       0.26       0.25
 21       0.39       0.21       0.22       0.22       0.27       0.25       0.14
 22       0.43       0.44       0.33       0.49       0.39       0.30       0.27
 23       0.49       0.41       0.09       0.35       0.10       0.11       0.15
 24       9.66   #8174.28  #15348.23      11.61       0.23       0.28       0.53
 25       1.10       0.78       0.25       0.19       0.23       0.18       0.13
 26       2.21       0.25       0.15       0.23       0.14       0.17       0.26
 27       0.62       0.33       0.29       0.31       0.27       0.30       0.51
 28       0.36       0.35       0.30       0.18       0.18       0.22       0.18
 29       0.26       0.35       0.31       0.15       0.13       0.12       0.27
 31       0.53       0.73       0.22       0.27       0.22       0.21       0.27
_______________________
#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 26   93  9 27   93  9 28   93  9 29   93  9 30   93 10  1   93 10  2
prn   3d rss (m)
  1       9.6        9.5        9.1        8.5        7.8        8.7        8.1 
  2       0.0        7.3       11.9       13.4       13.2       11.8       13.0 
  3       5.05       7.0        6.5        5.4        4.4        4.6        5.2 
  5      #4.1       #3.0       #4.3       #2.7       #3.1       #1.3       #1.9 
  7       7.2        5.8        6.5        6.5        7.4        7.0        5.6 
  9       7.8        7.0        3.7        4.0        4.6        2.9        3.2 
 12       2.1        3.8        4.4        3.2        4.1        2.5        2.5 
 13       6.1        3.5        4.5        8.6        4.7        6.6        9.3 
 14       6.8        6.6        0.0        3.7        3.6        3.4        3.9 
 15       4.0        2.7        5.7        8.9        9.3       12.4        8.4 
 16      11.4        8.8        8.7        8.2        8.2        6.5        9.3 
 17      10.5       12.1        5.6        4.4        2.3        5.5        8.3 
 18       9.3       10.1        8.7        9.0        7.1       12.3       10.2 
 19       5.6        4.1        4.5        5.6        5.9        5.6        5.0 
 20       6.7       11.3        4.4        6.0        4.6        4.7        4.1 
 21      10.5       12.0        6.2        6.1        5.9        4.1        3.3 
 22      15.3       12.0        9.3        7.8        7.9        6.1        4.6 
 23       7.5        4.7        2.3        9.6       11.0       14.9        9.4 
 24      10.0       #1.6       #8.2       12.8       11.4       10.5        7.6 
 25       7.0        5.3        4.7        5.0        4.8        5.4        4.5 
 26       7.1       10.5        4.0        5.1        4.0        5.4        6.5 
 27       0.0        8.7        7.7        6.1        6.3        7.5        7.2 
 28       5.4        3.0        2.8        3.9        2.7        3.6        2.7 
 29       8.8        6.9        6.2        6.1        5.7        6.2        6.7 
 31      12.1        8.2        5.2        6.0        5.0        7.1        5.6 
_______________________
#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 716 (1993 Sep 26 - Oct 02)
      93  9 26   93  9 27   93  9 28   93  9 29   93  9 30   93 10  1   93 10  2
Fiducials 6.7        6.0        6.7        8.4        8.0        8.5        8.4
Total    31.4       31.3       31.0       38.5       37.7       37.7       38.0
END SITE SUMMARY TABLE

JPL GROUND STATION INCLUSION TABLE           GPS week 716 (1993 Sep 26 - Oct 02)
      93  9 26   93  9 27   93  9 28   93  9 29   93  9 30   93 10  1   93 10  2
site    % data
ALBH       92         93         93        109        110        103         98
ALGO*      79         74         85        108        108        106        106
BRMU       52         66         61         71         75         69         84
DRAO       91         94         94        112        112        110        109
FAIR*      58          0         46        112        115        111        110
FORT       92         82         84        111        110        111        111
GGAO        0          0         92          0          0          0          0
GOLD       65         86         88         92         94         83         75
GRAZ        0          0         81          0          0          0          0
HART*      85         87         86        105        106        102        101
HERS       90         89         89        105        106        101         56
HOBA       88         87         88        103        104        106        106
JPLM       92         91         92        111        110        108        101
KIRU       85         81          0         93         94         87         77
KOKB*      91         91         94        105        106        110        107
KOSG        0         70          0         20         26         89         98
KOUR       89         87         93        113        109        106        106
MADR*      89         82         83        106        104        100        103
MASP       93         93         95        109        109        107        106
MATE       82         83         84         86          0         83         90
MCMU       92         99         96        107         98          0         91
MDO1       85         80         83         94         93         99        107
METS       91         91         79         99        102        103        103
NLIB       52          0          0         83        105         98        105
NYAL       83         98         97        108        102        103         90
ONSA       92         92         92        110        109        104        104
PAMA        0          0          0         93         97         91        100
PIE1       74         72         71         86         86         84         51
PINY       74         73         81         90         91         89         90
QUIN       79         78         76         88         82         91        105
RCM4       97         92         48          0         25          0          0
SANT*      88         89         91        107        108        106        104
STJO       91         74         73        106        109        106        108
TAIW       74         75         77         90         90         87         82
TIDB       89         87         91        108        106        109        106
TROM*      91         93         93         91         52        106        104
USUD       60         60         60         72         72         86        103
VNDP       90         92         93        108        109        107        107
WEST       88         86          0        108        108        106        107
WETT       82         86         91        107        107         93         84
YAR1*      89         89         91        107        105        105        103
YELL       67         91         87        113        112        109        107
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE