Subject: [IGSREPORT-168] JPL analysis report (0684)
From: David C Jefferson
Date: 12 MAR 1993 08:50:28

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IGS Electronic Report     12-MAR-1993 08:50:28       Message Number 168
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From: David C Jefferson
Subj: JPL analysis report (0684)
--------------------------------

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
______________________________________________________________________________
jpl06847.sum           This text file.
jpl06847.erp           Earth rotation parameters for GPS week 684.
jpl06847.sp1           GPS ephemerides for GPS week 684, sp1 format.
jpl06847.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

As in previous weeks, data from PRN11/GPSO8 have been deweighted; orbit
repeatabilites remain at the meter-level. Also, data from PRN03/GPS11 were
deweighted for February 20 (day 051) only. As per IGSMESS.209, data from
MCMU have not been included for the entire week of analysis. Beginning
with February 14 (day 045), we are weighting data from VNDP normally. Data for
February 21 (day 052) have not yet been processed, hence the single-digit
precision in the February 20 column of the orbit repeatability table.

A-S testing was in effect beginning at 17:00 on February 20. The following
conservative measures were taken for these first results using AS data from the
new Rogue software on this day (051):
   (1) data from the TurboRogue receivers at HARV, PIE1, QUIN, and VNDP were
       excluded, as well as the Rogues at GRAZ, HERS, METS, and WETT;
   (2) we only accepted data above 20 degrees elevation (instead of the usual
       15 degrees);
   (3) pseudorange data were greatly deweighted relative to the carrier phase
       (relative weight ratio of 10**-8 instead of the usual 10**-4).
These measures may be loosened in future analyses, pending further investigation
into noise degradation at low elevations and into the calibration of pseudorange
biases between A/S and "normal" data, and between Rogue A/S and TurboRogue A/S.

WARNING: Data from PRN03/GPS11 and PRN11/GPS08 have been deweighted for GPS week         684.

JPL LODR TABLE                               GPS week 684 (1993 Feb 14 - Feb 20)
  MJD       LODR     +/-
          (ms/day)
 49032.5    2.45     0.06
 49033.5    2.19     0.06
 49034.5    2.69     0.06
 49035.5    2.46     0.06
 49036.5    2.53     0.06
 49037.5    2.45     0.06
 49038.5    2.31     0.08
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 684 (1993 Feb 14 - Feb 20)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS
           ''        ''        sec     ''     ''      sec
 49032.5   .19941   .24494  -.04967  .00016  .00018  .00000  .0  .11  .00  .00  33 21  0
 49033.5   .19871   .24243  -.05546  .00017  .00019  .00000  .0  .10  .00  .00  33 21  0
 49034.5   .19761   .23959  -.05483  .00016  .00018  .00000  .0  .13  .00  .00  34 21  0
 49035.5   .19754   .23688  -.06078  .00017  .00018  .00000  .0  .09  .00  .00  34 21  0
 49036.5   .19656   .23527  -.06347  .00015  .00017  .00000  .0  .12  .00  .00  34 21  0
 49037.5   .19610   .23328  -.06618  .00016  .00017  .00000  .0  .10  .00  .00  34 21  0
 49038.5   .19761   .23210  -.06889  .00028  .00031  .00000  .0  .13  .00  .00  25 21  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 684:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 684 (1993 Feb 14 - Feb 20)
      93  2 14   93  2 15   93  2 16   93  2 17   93  2 18   93  2 19   93  2 20
prn   3d rss (m)
  1       0.39       0.46       0.27       0.24       0.35       0.73       1.4
  2       0.16       0.13       0.25       0.18       0.27       0.95       0.9
  3       0.20       0.24       0.21       0.32       0.32       4.12      16.9
 11       1.28       1.59       1.36       1.36       1.17       1.16       2.1
 12       0.44       0.74       0.51       0.45       0.48       0.89       0.5
 13       0.81       0.81       0.93       0.95       0.95       0.82       0.8
 14       0.36       0.24       0.28       0.47       0.73       0.65       1.1
 15       0.64       0.93       0.33       0.32       0.25       0.57       0.5
 16       0.34       0.21       0.33       0.26       0.12       0.65       0.9
 17       0.25       0.26       0.20       0.15       0.28       1.41       1.1
 18       0.14       0.12       0.21       0.30       0.32       0.46       0.4
 19       0.17       0.16       0.18       0.23       0.34       0.62       1.1
 20       0.62       0.53       0.46       0.52       0.67       1.98       1.3
 21       0.34       0.40       0.19       0.42       0.39       1.70       1.2
 23       0.40       0.28       0.29       0.34       0.52       0.93       0.6
 24       0.68       0.81       0.96       0.81       0.78       1.60       0.8
 25       0.62       0.77       0.56       0.47       0.37       1.42       1.2
 26       0.17       0.24       0.18       0.37       0.17       0.60       0.5
 27       0.24       0.18       0.22       0.20       0.19       0.39       0.9
 28       0.28       0.30       0.12       0.20       0.36       0.41       0.7
 29       0.61       0.38       0.62       0.68       0.57       0.60       0.6
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  2 14   93  2 15   93  2 16   93  2 17   93  2 18   93  2 19   93  2 20
prn   3d rss (m)
  1       9.0        8.6        8.5        8.1        7.4        7.8        7.4
  2       8.8        8.4        7.8        7.4        9.4       13.1       11.6
  3       7.0        6.9        6.4        6.2        6.4        7.2       12.9
 11      12.0       10.8       11.6       10.4       13.4       17.5       11.3
 12       7.9        9.0        8.7        9.0        9.3       10.3        7.5
 13       3.5        5.2        6.5        6.1        3.5        3.3        3.9
 14       7.6        6.3        8.4        8.2        6.9        9.4        6.9
 15       6.0        3.1        4.9        6.4        5.1        4.2        5.1
 16       9.8        6.4        5.8        5.8        6.2        5.2        7.7
 17       7.0        7.7        4.1        3.5        5.9        8.0        5.6
 18       7.7        5.3        8.6        6.7        7.6        8.7        5.4
 19       5.3        4.6        3.7        4.7        5.3        5.2        3.0
 20      11.2       10.7       10.8       12.8       12.6       11.5       10.9
 21       4.3        3.0        3.3        5.1        3.0        3.6        4.1
 23      17.1       12.2        7.1        7.3        7.1        6.4        7.5
 24      12.5       10.2       13.2       15.0       13.8       14.4       12.2
 25       8.1       10.9        7.9        6.4        7.5        6.5        6.3
 26       5.1        5.0        5.1        6.5        7.8       10.0        7.3
 27       8.4        9.0        7.3        7.5        9.2        8.8        8.3
 28      10.7        3.8        5.7        5.9        7.6        9.6        6.4
 29      11.5       13.2       12.6        9.6       14.1       20.5       13.2
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 684 (1993 Feb 14 - Feb 20)
      93  2 14   93  2 15   93  2 16   93  2 17   93  2 18   93  2 19   93  2 20
site    % data
ALBH      103         99        103        104        104        101         85
ALGO*      84         82         93        101        102         98         57
DRAO      105         99        105        106        105        103         86
FAIR*     109         99         98        100        100         97         81
GOLD       95         94         98         98         97        100         85
GRAZ       52         47         91        102        102         97          0
HART*     104        102        105        106        105        102         86
HARV      106         98        102        102         72         25          0
HERS      100         91        104         99         94         92          0
JPLM      107        102        106        107        107        106         88
KOKB*      83        100         96         27         89        101         73
KOSG      104         98        105        103        102         88         15
KOUR      104         98        106        109        109        104         83
MADR*      85         83         97         96         96         91         76
MASP       99         91        100        102        102         96         81
MATE      100         96        102        102        101         95         84
METS      105        100        104        101        105         97          0
NYAL        0          0         49        121        121         65         14
ONSA       93         93        100        102        102        100         72
PAMA       97         96         99         99         99         98         81
PIE1       95         92         99         99        100         93          0
QUIN       91         86         88         84         89         95          0
RCM2       98         95         26         45         99         99         87
SANT*     106         98        106        106        107        106         89
STJO       98         92         99         99         99         97         81
TAIW      106        103        105        104         98        103         81
TIDB       94         91        103        102        100         99         83
TROM*     117        112        117        118        117        114         93
USUD      106        102        106        106        105        104         84
VNDP      107        102        106        107        107        105          0
WETT       97         84         97         99        103         98          0
YAR1*     106        103        107        107        108        105         27
YELL       75         97         75        109        111         99         66
_______________________
*Indicates fiducial site.
END GROUND STATION INCLUSION TABLE