Subject: [IGSREPORT-69] JPL analysis report
From: David C Jefferson
Date: 30 DEC 1992 12:05:56

***********************************************************************
IGS Electronic Report     30-DEC-1992 12:05:56       Message Number 69
***********************************************************************

From:    David C Jefferson
Subject: JPL analysis report
----------------------------

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
______________________________________________________________________________
jpl06757.sum           This text file.
jpl06757.erp           Earth rotation parameters for GPS week 675.
jpl06757.sp1           GPS ephemerides for GPS week 675, sp1 format.
jpl06757.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

A-S testing was not active for the duration of this GPS week, hence all seven
days are included in this report. However, according to the file 
pub/gps/gpsn4.txt obtained from tycho.usno.navy.mil, PRN28/GPS28 was scheduled
unusable for up to 8 hours on Dec 17 (day 352), beginning at 03:35:00 UT. Our
analysis confirms that the behavior of this satellite is poorly modeled on this
day. The corresponding data have thus been de-weighted, and we recommend using
the broadcast ephemeris.

Additionally, we continue to de-weight data for PRN's 11 and 32 (GPS08, GPS32),
which still produce repeatabilites on the order of a meter.
 
WARNING: PRN's 11 and 32 (GPS08 and GPS32) are poorly modelled at the meter-             level. PRN28 (GPS28) is poorly modeled on Thursday, Dec 17.

JPL LODR TABLE                               GPS week 675 (1992 Dec 13 - Dec 19)
  MJD       LODR     +/-
          (ms/day)
 48969.5    2.61     0.05
 48970.5    2.69     0.05
 48971.5    2.53     0.05
 48972.5    2.35     0.05
 48973.5    2.36     0.05
 48974.5    2.63     0.05
 48975.5    2.29     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 675 (1992 Dec 13 - Dec 19)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 48969.5   .18899   .40629   .11026  .00015  .00013  .00000  .0 -.03  .00  .00  27 20  0
 48970.5   .19048   .40421   .10795  .00015  .00013  .00000  .0 -.02  .00  .00  27 20  0
 48971.5   .19161   .40224   .10564  .00016  .00013  .00000  .0 -.01  .00  .00  27 20  0
 48972.5   .19180   .40034   .10334  .00015  .00013  .00000  .0  .02  .00  .00  28 20  0
 48973.5   .19250   .39746   .10105  .00016  .00015  .00000  .0  .05  .00  .00  28 20  0
 48974.5   .19333   .39522   .09875  .00017  .00015  .00000  .0 -.02  .00  .00  26 20  0
 48975.5   .19476   .39260   .09646  .00017  .00015  .00000  .0 -.02  .00  .00  25 20  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 675:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 675 (1992 Dec 13 - Dec 19)
      92 12 13   92 12 14   92 12 15   92 12 16   92 12 17   92 12 18   92 12 19
prn   3d rss (m)
  2       0.27       0.21       0.26       0.41       0.35       0.43       0.25
  3       0.20       0.29       0.37       0.53       0.54       0.81       0.47
 11       9.72      15.10      18.28       0.64       0.85       0.68       0.96
 12       0.43       0.50       0.46       0.44       0.43       0.36       0.44
 13       0.37       0.36       0.29       0.41       0.42       0.15       0.29
 14       0.28       0.17       0.30       0.27       0.37       0.29       0.42
 15       0.38       0.39       0.60       0.40       0.57       0.65       0.31
 16       0.46       0.36       0.40       0.62       0.90       0.89       0.83
 17       0.23       0.25       0.28       0.56       0.66       1.39       0.36
 18       0.27       0.17       0.30       0.27       0.22       0.26       0.17
 19       0.24       0.25       0.35       0.24       0.24       0.17       0.11
 20       0.64       0.74       0.50       0.44       0.50       0.61       0.76
 21       0.59       0.71       0.41       0.49       0.55       0.50       0.68
 23       0.38       0.56       0.65       0.46       0.52       0.61       1.03
 24       0.31       0.30       0.41       0.45       0.43       0.27       0.22
 25       0.33       0.28       0.33       0.43       0.49       0.34       0.30
 26       0.31       0.28       0.27       0.21       0.16       0.18       0.18
 27       0.47       0.25       0.46       0.36       0.32       0.27       0.28
 28       0.32       0.34       0.22     307.34     323.16     553.75       0.37
 32       1.32       1.27       2.15       2.90       2.30       2.12       1.85
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
      92 12 13   92 12 14   92 12 15   92 12 16   92 12 17   92 12 18   92 12 19
prn   3d rss (m)
  2       4.3        4.5        5.0        5.4        4.7        3.3        3.7 
  3      20.8       19.0       19.9       17.9       16.8       19.0       18.0 
 11      56.8       41.1        7.6        6.4        2.9        2.9        2.0 
 12       9.3        5.1        7.0        9.0        7.5       10.1        7.1 
 13       5.1        3.9        4.6        5.2        5.1        6.8        7.6 
 14       6.0        4.8        7.3        5.4        5.9        7.5        7.2 
 15       3.3        3.2        3.6        3.0        2.6        4.9        4.8 
 16       7.8        6.0        4.3        5.9        6.2        7.2        6.1 
 17       2.3        1.9        3.2        4.7        2.7        3.4        4.3 
 18       4.8        4.2        6.0        6.0        7.5        5.4        6.6 
 19       6.8        5.1        7.3        7.9        7.0        6.8        6.6 
 20       6.7        4.1        3.9        5.7        7.8        8.2        7.2 
 21       4.1        3.0        2.4        2.3        2.2        3.0        3.7 
 23       8.3        7.4        5.5        4.5        3.5        5.1        5.7 
 24       5.0        4.8        4.8        5.2        5.3        5.2        5.6 
 25       9.9       11.5       10.3       11.8        8.8       10.0       10.6 
 26       2.4        2.7        4.0        4.7        6.3        8.3        5.3 
 27      12.5       10.2       10.3       11.0       10.9       13.7       13.3 
 28      13.4        9.6        8.3        8.8      768.8       20.6        3.5 
 32      27.7       30.6       45.9       28.0       33.0       28.6       26.1 
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

The following table, as explained in IGS Mail Message 91, indicates which
tracking sites were used in this week's analysis:

JPL GROUND STATION INCLUSION TABLE           GPS week 675 (1992 Dec 13 - Dec 19)
      92 12 13   92 12 14   92 12 15   92 12 16   92 12 17   92 12 18   92 12 19

ALBH      X          X          X          X          X          X          X
ALGO*     X          X          X          X          X          X          X
DRAO      X          X          X          X          X          X          X
FAIR*     X          X          X          X          X          X          X
GOLD      X          X          X          X          X          X          X
HART*     X          X          X          X          X          X          X
JPLM      X          X          X          X          X          X          X
KOKB*                                      X          X          X           
KOSG      X          X          X          X          X          X          X
KOUR      X          X          X          X          X                      
MADR*     X          X          X          X          X          X          X
MASP      X          X          X          X          X                      
MATE      X          X          X          X          X          X          X
MCMU      X          X          X          X          X          X          X
METS      X          X          X          X          X          X          X
ONSA      X          X          X          X          X          X          X
PAMA      X          X          X          X          X          X          X
RCM2      X          X          X          X          X          X          X
SANT*     X          X          X          X          X          X          X
STJO      X          X          X          X          X          X          X
TAIW      X          X          X          X          X          X          X
TIDB      X          X          X          X          X          X          X
TROM*     X          X          X          X          X          X          X
USUD      X          X          X          X          X          X          X
WETT      X          X          X          X          X          X          X
YAR1*     X          X          X          X          X          X          X
YELL      X          X          X          X          X          X          X
_______________________
*Indicates fiducial site.
END GROUND STATION INCLUSION TABLE