Subject: [IGSREPORT-230] JPL Analysis Report (week 689)
From: G. Blewitt
Date: 21 APR 1993 08:31:26

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IGS Electronic Report     21-APR-1993 08:31:26       Message Number 230
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From: G. Blewitt
Subj: JPL Analysis Report (week 689)
------------------------------------

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
______________________________________________________________________________
jpl06897.sum           This text file.
jpl06897.erp           Earth rotation parameters for GPS week 689.
jpl06897.sp1           GPS ephemerides for GPS week 689, sp1 format.
jpl06897.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

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, PRN25/GPS25 was scheduled unusable for up to 8
hours on March 25 (day 084), beginning at 20:15 UT (a maneuver). With this
information, and conforming to our 30-hr data processing interval, we have
chosen to deweight PRN25 on days 084 and 085. Except for March 21 and 22,
we have deweighted data for the still relatively new satellite PRN22/GPS22;
its orbit repeatabilities continue to be at the 10-100m level. (As a reminder,
there was no broadcast ephemeris data for PRN22 on Saturday, Mar 20, hence
the single-digit precision in orbit repeatability on Sunday, Mar21; see
jpl06887.sum for details.)

Data from MCMU have been excluded for the entire week of analysis in accordance
with IGS Message No. 209.

WARNING: Data from PRN11/GPS08 have been deweighted for the entire GPSweek 689.
WARNING: Data from PRN22/GPS22 have been deweighted for all of week 689 EXCEPT           for days 80 and 81 (March 21,22).
WARNING: Data from MCMU have been excluded for the entire GPSweek 689.

JPL LODR TABLE                               GPS week 689 (1993 Mar 21 - Mar 27)
  MJD       LODR     +/-
          (ms/day)
 49067.5    2.90     0.06
 49068.5    2.79     0.06
 49069.5    3.00     0.06
 49070.5    2.74     0.06
 49071.5    2.92     0.06
 49072.5    2.64     0.06
 49073.5    2.60     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 689 (1993 Mar 21 - Mar 27)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS
           ''        ''        sec     ''     ''      sec
 49067.5   .14438   .18425  -.14882  .00017  .00019  .00000  .0  .08  .00  .00  34 22  0
 49068.5   .14255   .18261  -.15159  .00019  .00019  .00000  .0  .07  .00  .00  35 22  0
 49069.5   .14021   .18127  -.15219  .00017  .00019  .00000  .0  .09  .00  .00  36 22  0
 49070.5   .13799   .18005  -.15500  .00018  .00021  .00000  .0  .08  .00  .00  34 22  0
 49071.5   .13515   .17877  -.15781  .00019  .00022  .00000  .0  .09  .00  .00  36 22  0
 49072.5   .13243   .17767  -.16061  .00018  .00021  .00000  .0  .08  .00  .00  36 22  0
 49073.5   .12880   .17659  -.16341  .00018  .00021  .00000  .0  .12  .00  .00  35 22  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 689:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 689 (1993 Mar 21 - Mar 27)
      93  3 21   93  3 22   93  3 23   93  3 24   93  3 25   93  3 26   93  3 27
prn   3d rss (m)
  1       0.26       0.40       0.34       0.59       0.38       0.26       0.13
  2       0.34       0.26       0.20       0.21       0.28       0.24       0.21
  3       0.40       0.29       0.38       0.30       0.39       0.43       0.38
 11      #2.17      #2.49      #0.93      #0.71      #0.85      #0.98      #1.39
 12       0.22       0.21       0.46       0.41       0.22       0.21       0.14
 13       0.34       0.39       0.32       0.79       0.50       0.27       0.41
 14       0.27       0.32       0.30       0.28       0.28       0.44       0.26
 15       0.10       0.23       0.20       0.21       0.23       0.46       0.23
 16       0.23       0.28       0.32       0.15       0.34       0.34       0.33
 17       0.17       0.31       0.27       0.19       0.40       0.33       0.19
 18       0.47       0.56       0.53       0.18       0.41       0.36       0.31
 19       0.34       0.31       0.33       0.28       0.22       0.30       0.11
 20       0.27       0.24       0.22       0.22       0.26       0.20       0.23
 21       0.39       0.44       0.34       0.45       0.38       0.16       0.19
 22       0.2       16.51     #23.66     #65.14     #90.57    #115.03    #110.94
 23       0.51       0.45       0.34       0.33       0.36       0.20       0.31
 24       0.28       0.42       0.49       0.36       0.34       0.34       0.21
 25       0.33       0.45       0.27     194.52    #521.94   #2249.59     263.89
 26       0.23       0.25       0.27       0.14       0.29       0.22       0.32
 27       0.30       0.37       0.35       0.31       0.32       0.26       0.40
 28       0.30       0.26       0.29       0.21       0.26       0.59       0.20
 29       0.47       0.59       0.60       0.57       0.97       1.20       0.74
_______________________
#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 21   93  3 22   93  3 23   93  3 24   93  3 25   93  3 26   93  3 27
prn   3d rss (m)
  1      10.0       10.1        8.8        9.4        9.8       10.3       10.0
  2       7.6        9.0        5.2        5.7        4.5        5.5        6.5
  3       7.8        8.3        8.8        9.4       11.5        9.3        8.9
 11     #13.8       #4.0       #4.9       #3.8       #3.2       #4.4       #4.7
 12       7.4        6.9        6.5        4.8        3.6        3.6        7.4
 13       2.9        3.9        3.3        3.2        3.22       3.3        3.4
 14      14.4       10.6        9.6       10.6       11.9       10.0        9.7
 15       6.4        5.1        3.2        4.4        3.0        4.3        7.6
 16       4.9        4.2        9.9        4.4        9.7        4.9        7.4
 17       5.3        6.1        5.7        6.0        8.8        8.9        7.4
 18       9.3       10.5       10.8       17.1        8.6       16.2       18.1
 19       4.0        4.9        2.9        6.1        4.2        0.0        3.2
 20       6.6        6.1        8.3        8.5        5.6        6.1        8.2
 21       8.5        5.9        5.0        8.1        8.2        5.8        7.7
 22     307.8      288.2     #118.0     #119.4     #288.1     #860.1     #465.7
 23       7.5       10.3        7.4        9.2        8.9       12.6       13.9
 24       5.1        4.6        4.6        2.9        3.6        4.0        5.2
 25       7.7        9.5        9.9       12.3     #184.5    #3939.9        9.6
 26       4.1        3.3        3.9        4.7        4.6        4.4        5.4
 27       4.2        5.6        5.0        7.4        6.0        5.3        6.1
 28       4.5        5.2        4.0        5.7        5.5        3.5        4.4
 29      11.6       12.1        8.5        9.0        9.3       10.9        9.3
_______________________
#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 689 (1993 Mar 21 - Mar 27)
      93  3 21   93  3 22   93  3 23   93  3 24   93  3 25   93  3 26   93  3 27
site    % data
ALBH      103        105        100        101         96         96         91
ALGO*     105        106        102        102         98         98         98
DRAO      103        105        102        102         98         96         95
FAIR*     101        100         98         99         93         94         98
GOLD       94         94         91         30         62         91         93
GRAZ       53         94        101        101         95         92         99
HART*     108        109        101        103         94         94        103
HERS      107        107        104         94         19         89        100
JPLM      102         98         98        100         94         95         96
KOKB*      55         28         93        103        101        100        104
KOSG      104        102         97        103        101         98         96
KOUR      101        107         95         10          0          0          0
MADR*     106        106        100         32         63         93         91
MASP      105        106         99        100         98         96         95
MATE      101        102         99        100         92         17          0
METS      110        110        106        108        100         99        106
NLIB       97        100         89         94         90         93         99
NYAL       88        123        121        122         56         63        120
ONSA       95         98         93        101         93         86         83
PAMA      102        101         98         96         94         84         18
PIE1       85         88         83         80         77         94        103
QUIN       54         16          0          0         23         98        102
RCM2        0         38        103        106        101        100        100
SANT*     110        108        106        107        103        103        106
STJO      103        102        100        103         99        100        104
TAIW      110        112        103        108         96        101        106
TIDB      107         60        103         35         65        100        105
TROM*     117        120        114        112         89        112        113
USUD      105        108        102        102         97         98        102
VNDP      100        101         99        101         97         93         99
WEST      104        102         98         97         92         92         96
WETT       72         50         48         59         78         96        102
YAR1*     112        112         91        109        102        102        109
YELL      107        108        107        107        103        102        103
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE