Subject: [IGSREPORT-206] JPL Analysis Report (week 688)
From: D. Jefferson
Date: 8 APR 1993 08:23:11

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IGS Electronic Report      8-APR-1993 08:23:11       Message Number 206
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From: D. Jefferson
Subj: JPL Analysis Report (week 688)
------------------------------------

Submitted by

J F Zumberge, G Blewitt, M B Heflin, D C Jefferson, 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
______________________________________________________________________________
jpl06887.sum           This text file.
jpl06887.erp           Earth rotation parameters for GPS week 688.
jpl06880.sp1,sp3       GPS ephemerides for Sun, Mar 14, sp1 and sp3 formats
jpl06881.sp1,sp3       GPS ephemerides for Mon, Mar 15, sp1 and sp3 formats
jpl06882.sp1,sp3       GPS ephemerides for Tue, Mar 16, sp1 and sp3 formats
jpl06883.sp1,sp3       GPS ephemerides for Wed, Mar 17, sp1 and sp3 formats,
                       (no PRN18)
jpl06884.sp1,sp3       GPS ephemerides for Thu, Mar 18, sp1 and sp3 formats,
                       (no PRN18)
jpl06885.sp1,sp3       GPS ephemerides for Fri, Mar 19, sp1 and sp3 formats,
                       (no PRN22)
jpl06886.sp1,sp3       GPS ephemerides for Sat, Mar 20, sp1 and sp3 formats,
                       (no PRN22)
______________________________________________________________________________

We continue to deweight data from PRN11/GPS08; orbit repeatabilites for this
spacecraft remain at the meter-level. Also, according to the file gpsn1.txt
obtained from tycho.usno.mil, PRN18/GPS18 was scheduled unusable for up to 8
hours on March 17 (day 076), beginning at 15:15 UT (a maneuver). With this
information, and conforming to our 30-hr data processing interval, we have
chosen to delete PRN18 on days 076 and 077 as well.

We continue to deweight data for the new satellite PRN22/GPS22. However, no
broadcast ephemeris data was available for PRN22/GPS22 on March 19 and 20;
therefore, we have excluded this satellite from our processing for these two
days. Lastly, although PRN03 was deweighted on March 19, there is no evidence
of anomolous behavior for this satellite.

Data from MCMU have been excluded for the entire week of analysis in accordance
with IGS Message Nos. 209. Tracking data from FAIR has be re-instated to our
analyses for this week, after being cleared for usage by JPL GPS Network
Operations. Finally, data from NLIB has been weighted normally for the entire
week of analysis.

WARNING: Data from PRN03/GPS11 have been deweighted for day 078 (Mar 19).
WARNING: Data from PRN11/GPS08 have been deweighted for the entire GPSweek 688.
WARNING: Due to the maneuver of PRN18/GPS18, data from this satellite have               been deleted for days 076 and 077 (Mar 17,18).
WARNING: Data from PRN22/GPS22 have been deweighted for days 073 and 075-077             (Mar 14,16-18); data from this satellite have been deleted for days             078 and 079 (Mar 19,20) as no broadcast data were available.
WARNING: Data from MCMU have been excluded for the entire GPSweek 688.

JPL LODR TABLE                               GPS week 688 (1993 Mar 14 - Mar 20)
  MJD       LODR     +/-
          (ms/day)
 49060.5    2.84     0.06
 49061.5    2.82     0.06
 49062.5    2.80     0.06
 49063.5    2.68     0.06
 49064.5    2.83     0.06
 49065.5    2.85     0.06
 49066.5    2.79     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 688 (1993 Mar 14 - Mar 20)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS
           ''        ''        sec     ''     ''      sec
 49060.5   .16007   .19411  -.12940  .00016  .00018  .00000  .0  .12  .00  .00  33 22  0
 49061.5   .15778   .19275  -.13217  .00016  .00018  .00000  .0  .10  .00  .00  34 22  0
 49062.5   .15536   .19123  -.13494  .00017  .00019  .00000  .0  .11  .00  .00  34 22  0
 49063.5   .15282   .19024  -.13771  .00018  .00020  .00000  .0  .13  .00  .00  34 21  0
 49064.5   .14996   .18898  -.14049  .00019  .00021  .00000  .0  .11  .00  .00  34 21  0
 49065.5   .14763   .18696  -.14326  .00018  .00020  .00000  .0  .09  .00  .00  34 21  0
 49066.5   .14605   .18539  -.14604  .00018  .00020  .00000  .0  .10  .00  .00  33 21  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 688:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 688 (1993 Mar 14 - Mar 20)
      93  3 14   93  3 15   93  3 16   93  3 17   93  3 18   93  3 19   93  3 20
prn   3d rss (m)
  1       0.40       0.16       0.13       0.22       0.36       0.17       0.46
  2       0.33       0.21       0.22       0.32       0.27       0.23       0.32
  3       0.25       0.52       0.40       0.33       1.04      #0.62       0.85
 11      #1.57      #1.27      #2.18      #1.78      #1.93      #1.03      #2.93
 12       0.30       0.34       0.45       0.50       0.44       0.45       0.44
 13       0.56       0.30       0.21       0.61       0.43       0.37       0.44
 14       0.50       0.35       0.36       0.19       0.39       0.41       0.51
 15       0.21       0.17       0.18       0.20       0.17       0.22       0.30
 16       0.26       0.35       0.29       0.59       2.45       0.28       0.32
 17       0.19       0.18       0.13       0.30       0.34       0.22       0.16
 18       0.47       0.35       0.5                              0.2        0.37
 19       0.30       0.39       0.23       0.22       0.31       0.25       0.47
 20       0.63       0.58       0.26       0.17       0.44       0.32       0.31
 21       0.49       0.37       0.34       0.28       0.40       0.42       0.40
 22     #49.34      41.94     #51.41     #95.35     #34.0
 23       0.57       0.51       0.50       0.41       0.58       0.61       0.55
 24       0.45       0.48       0.27       0.38       0.43       0.34       0.43
 25       0.30       0.19       0.22       0.31       0.37       0.31       0.27
 26       0.29       0.40       0.21       0.18       0.27       0.16       0.27
 27       0.39       0.24       0.22       0.26       0.40       0.22       0.23
 28       0.38       0.46       0.14       0.15       0.23       0.43       0.56
 29       0.75       0.66       0.57       0.35       0.33       0.40       0.55
_______________________
#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  3 14   93  3 15   93  3 16   93  3 17   93  3 18   93  3 19   93  3 20
prn   3d rss (m)
  1      10.3       10.7       10.7       10.6       10.4       11.1       10.7
  2       7.6       10.4        6.4        7.3        7.9        7.5        6.8
  3       8.9        6.1        6.5        6.8       10.2       #8.3        7.8
 11      #6.1       #6.2       #6.7      #13.6       #7.1       #9.0       #9.7
 12      26.9       16.7        7.2        5.16       3.2        4.7        4.5
 13       1.9        1.8        4.0        4.1        2.9        3.0        3.2
 14      11.2       11.1        8.9       10.0       11.3       10.5       11.0
 15       4.8        7.5        4.3        9.8        3.8        4.4        3.9
 16       5.0        6.2        8.9        7.2        8.6        8.7        9.8
 17       7.4        7.6        6.6        7.3        8.6        5.2        5.7
 18      10.7       10.4       11.2                              8.9       11.4
 19       6.8        2.6        2.5        4.6        4.8        5.5        3.5
 20       6.6        7.0        6.2        5.6        6.0        5.5        5.0
 21       8.4       13.5        6.9        5.3        5.5        4.3        4.1
 22    #122.1      153.9     #238.7    #2105.1    #3808.7
 23      11.8       14.3        8.1       13.4       15.9       10.4       10.0
 24       4.9        7.5        9.9        9.7        7.0        5.6        7.8
 25      10.1       14.3       11.7        7.8        9.3        8.0        7.3
 26       5.3        6.7        5.1        4.3        4.7        4.5        4.9
 27       7.1        5.1        5.1        5.5        5.6        5.7        4.5
 28       6.4        5.6       11.0        5.4        4.3        4.0        4.6
 29      12.7       13.2       10.1       12.4        8.8       13.3       14.2
_______________________
#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 688 (1993 Mar 14 - Mar 20)
      93  3 14   93  3 15   93  3 16   93  3 17   93  3 18   93  3 19   93  3 20
site    % data
ALBH      101        106        101         95         94         93        100
ALGO*     102         96         89         91         94         96        101
DRAO      104        109        103         96         91         97        103
FAIR        0          8          0          0         95         93         99
GOLD       18         81         16         81         89         87         91
GRAZ       53         67         77         96         95         96         60
HART*     101        110        101         96         95         96        102
HERS       98        107        101         99         99         97        104
JPLM      104        109        105         99         96         94        101
KOKB*     106        106        106        100         99        101        105
KOSG      104        110        105        101         98         97        102
KOUR      110        114        103         89         84         93         20
MADR*      94        100        102         95         95         98         99
MASP       88         19         88         94         96         97        101
MATE       98        104        100         94         85         94         96
METS      106        113        106        102         98         89         99
NLIB       97        101         99         93         93         94         95
NYAL      108        125        120        105        106         60          0
ONSA       91         90         80         94         88         89         91
PAMA       97         88         97         49          8         80         96
PIE1       92         96         92         91         86         79         83
QUIN        0          0         31         50          0         28         93
RCM2       89        104        104         72         79         58          0
SANT*     107        112        107         97         89         98        108
STJO      101        106        101         93         90         89        101
TAIW      106        112        108        104        102         99        104
TIDB      101        110        104        101         99         94        104
TROM*     112        118        112        107        107        109        111
USUD      105        105        103        101        102         97        101
VNDP        0          0          0          0          0          0         77
WEST       78         83          8          9         85         94        101
WETT       45         69        101         98         94         95        101
YAR1*     108        113        109        104        103         98        109
YELL      106        113        107        101         99        102        104
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE