Subject: [IGSREPORT-242] JPL Analysis Report (week 691)
From: J F Zumberge, G Blewitt, M B Heflin, D C Jefferson, F H Webb
Date: 29 APR 1993 08:56:30

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IGS Electronic Report     29-APR-1993 08:56:30       Message Number 242
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From: J F Zumberge, G Blewitt, M B Heflin, D C Jefferson, F H Webb
Subj: JPL Analysis Report (week 691)
------------------------------------

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

______________________________________________________________________________
filename               contents
______________________________________________________________________________
jpl06917.sum           This text file.
jpl06917.erp           Earth rotation parameters for GPS week 691.
jpl06917.sp1           GPS ephemerides for GPS week 691, sp1 format.
jpl06917.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

Beginning this week, we have stopped deweighting data from PRN11/GPS08; orbit
repeatabilities are at the sub-meter level as indicated by the corresponding
table. It was also decided that PRN22/GPS22 be deleted indefinitely, as the
mismodeling of this relatively new satellite has caused our LODR estimates
to be skewed on various days of analysis.

Additionally, we have resumed including tracking data from MCMU (McMurdo Bay,
Antarctica) as they have been cleared for usage by JPL GPS Network Operations.
Lastly, starting with April 8 (day 98), we weight data from the new site BRMU
normally.

WARNING: No warnings for GPS week 691.

JPL LODR TABLE                               GPS week 691 (1993 Apr 04 - Apr 10)
  MJD       LODR     +/-
          (ms/day)
 49081.5    2.79     0.05
 49082.5    2.64     0.06
 49083.5    2.63     0.05
 49084.5    2.99     0.05
 49085.5    2.71     0.05
 49086.5    2.63     0.05
 49087.5    3.04     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 691 (1993 Apr 04 - Apr 10)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS
           ''        ''        sec     ''     ''      sec
 49081.5   .10605   .16895  -.18564  .00015  .00016  .00000  .0  .02  .00  .00  39 21  0
 49082.5   .10269   .16817  -.18842  .00016  .00016  .00000  .0 -.02  .00  .00  39 21  0
 49083.5   .09965   .16773  -.19119  .00015  .00015  .00000  .0  .02  .00  .00  39 21  0
 49084.5   .09655   .16736  -.19396  .00014  .00015  .00000  .0  .01  .00  .00  39 21  0
 49085.5   .09317   .16693  -.19673  .00014  .00015  .00000  .0  .01  .00  .00  39 21  0
 49086.5   .09015   .16601  -.19949  .00014  .00015  .00000  .0  .01  .00  .00  38 21  0
 49087.5   .08689   .16548  -.20225  .00014  .00014  .00000  .0 -.02  .00  .00  38 21  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 691:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 691 (1993 Apr 04 - Apr 10)
      93  4  4   93  4  5   93  4  6   93  4  7   93  4  8   93  4  9   93  4 10
prn   3d rss (m)
  1       0.28       0.26       0.27       0.41       0.72       1.04       1.20
  2       0.24       0.21       0.18       0.15       0.17       0.18       0.23
  3       0.44       0.35       0.44       0.57       0.64       0.64       0.62
 11       0.39       0.30       0.32       0.35       0.25       0.29       0.36
 12       0.24       0.14       0.14       0.17       0.16       0.17       0.19
 13       0.32       0.23       0.30       0.33       0.32       0.34       0.33
 14       0.20       0.16       0.16       0.19       0.18       0.13       0.19
 15       0.22       0.28       0.35       0.30       0.25       0.22       0.22
 16       0.39       0.34       0.12       0.16       0.25       0.24       0.18
 17       0.50       0.46       0.18       0.18       0.26       0.41       0.34
 18       0.22       0.38       0.29       0.42       0.48       0.35       0.51
 19       0.16       0.15       0.11       0.16       0.30       0.23       0.28
 20       0.21       0.21       0.20       0.29       0.30       0.37       0.35
 21       0.26       0.16       0.11       0.23       0.23       0.25       0.21
 23       0.42       0.22       0.16       0.31       0.31       0.26       0.25
 24       0.20       0.17       0.14       0.16       0.21       0.17       0.16
 25       0.35       0.33       0.47       0.37       0.36       0.40       0.45
 26       0.19       0.14       0.18       0.20       0.30       0.31       0.25
 27       0.21       0.21       0.16       0.18       0.28       0.26       0.20
 28       0.29       1.07       0.70       0.22       0.12       0.22       0.27
 29       0.15       0.15       0.21       0.25       0.19       0.23       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  4  4   93  4  5   93  4  6   93  4  7   93  4  8   93  4  9   93  4 10
prn   3d rss (m)
  1       9.2        9.8        9.2       11.7       36.2       68.5       60.1
  2       5.0        5.0        4.2        4.6        6.7        3.7        3.9
  3      12.9       12.1       10.8       12.0       12.8       11.4       12.0
 11       5.2        5.7        5.1        8.0       10.1        7.2        6.3
 12       6.4        7.4       11.8        7.9        6.18       7.4        7.5
 13       3.7        5.2        6.8        6.1        3.0        6.6        6.6
 14       6.5        8.2        5.5        3.7        4.6        5.2        6.7
 15       4.1        8.1        4.5        7.8        8.9        4.6        5.8
 16       5.8        4.6        4.6        7.2        8.6        6.7        5.2
 17       5.8        7.4        6.6        7.1        9.3        7.9        7.5
 18      14.2       11.8       10.7       26.2        9.9        9.0       10.1
 19       2.8        2.9        3.2        3.2        3.9        4.4        3.8
 20       6.4        7.1        8.0        7.6        6.7       10.5       10.6
 21       3.8        3.6        3.6        5.2        7.2        4.9        5.2
 23       5.3       15.2       21.6       20.2       18.6       21.5       25.9
 24       3.5        5.6        5.8        4.5        5.4        5.0        4.6
 25       9.5        9.2        8.1        8.3       10.5        9.1        7.6
 26       4.9        9.2        7.2        6.8        6.6        5.5        5.6
 27       2.9        2.5        3.6        4.0        3.8        6.3        6.8
 28       7.4        8.4       10.3       11.4       12.3        8.8       14.3
 29       7.5        6.1        6.8        6.1        7.8        7.3        8.4
_______________________
#Indicates deweighted satellite.
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

The following table, as explained in IGS Report No. 99, indicates the amount
of data from each tracking site used in this week's analysis:

JPL GROUND STATION INCLUSION TABLE           GPS week 691 (1993 Apr 04 - Apr 10)
      93  4  4   93  4  5   93  4  6   93  4  7   93  4  8   93  4  9   93  4 10
site    % data
ALBH       93        103        103        104        105        104        105
ALGO*     108        105        106        107         93         97        108
BRMU     #108       #106       #108        #86         59        103        104
DRAO       58         95        105        107        107        106        105
FAIR*     103        102        100        104         85        105         85
GOLD       93         96         96         97         99         94         95
GRAZ       22         56         56         98        109        109        109
HART*     105        103        103        107        106        106        105
HERS      107        104         94         52         11          0          0
HOBA      #98         70         64         92         99         86         73
JPLM       51         47        107        101         65         96         70
KOKB*     108        108        106        108        109        109        109
KOSG      108        104        110        112         98         83        105
KOUR      115        112        113        113        115        114        114
MADR*      76         12         84        106        107         78         62
MASP      107        105        107        108        111        112        111
MATE       99         89         94         94         93        105        103
MCMU      119        124        121        124        123        122        118
METS      111        111        112        113        113        111        111
NLIB       99        100        108        108        109        104        103
NYAL      126        126        125        127        125        126        124
ONSA       94         89         32          9         95        110        104
PAMA       99        103         95        102        102         99        103
PIE1      109        105        109        109        105        104        104
QUIN       95        101        104        100         96         95        100
RCM2      108        106        107        110        108        107        106
SANT*     109        109        106        110        112        113        112
STJO      110        107        110        110         94         90        111
TAIW       84        106        105        108        109        110        110
TIDB       97         22         96        109        107        109        109
TROM*     120        113        120        120        109        117        121
USUD      106        108        104        108        107        107        101
VNDP       99        103        102        103        103        104        104
WEST      109        105        108        106         99         97         98
WETT       23         71         74        108         77         47         67
YAR1*     112        110        109        112        111        111        111
YELL      113        110        111        103        114        114        113
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE