[IGSREPORT-184] JPL Analysis Report (week 686)
D.
D.
Wed Mar 24 09:10:27 PST 1993
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IGS Electronic Report 24-MAR-1993 09:10:27 Message Number 184
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From: D. Jefferson
Subj: JPL Analysis Report (week 686)
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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
starr at logos.jpl.nasa.gov):
______________________________________________________________________________
filename contents
______________________________________________________________________________
jpl06867.sum This text file.
jpl06867.erp Earth rotation parameters for GPS week 686.
jpl0686[0-4].sp1 GPS ephemerides for Sun, Feb 28 through Thu, Mar 4,
sp1 format - (w/PRN14).
jpl06865.sp1 GPS ephemerides for Fri, Mar 5, sp1 format - (no PRN14).
jpl06866.sp1 GPS ephemerides for Sat, Mar 6, sp1 format - (w/PRN14).
jpl0686[0-4].sp3 GPS ephemerides for Sun, Feb 28 through Thu, Mar 4,
sp3 format - (w/PRN14).
jpl06865.sp3 GPS ephemerides for Fri, Mar 5, sp3 format - (no PRN14).
jpl06866.sp3 GPS ephemerides for Sat, Mar 6, sp3 format - (w/PRN14).
______________________________________________________________________________
We continue to deweight data from PRN11/GPSO8; orbit repeatabilites for this
spacecraft remain at the meter-level. Also, according to the file gpsn1.txt
obtained from tycho.usno.mil, PRN14/GPS14 was scheduled unusable for up to 8
hours on March 5 (day 064), beginning at 14:55 UT (a maneuver). Because of
this, we have chosen to delete this satellite from our analysis of March 5, and
to deweight its data for March 6. Beginning this week, we are including results
for PRN22/GPS22, which was launched February 3 (day 034). As this is a new
satellite, its data have been deweighted for this week's analysis.
As per IGSMESS.209, data from MCMU have been excluded for the entire week of
analysis. Also, information from IGS Message Nos. 212 and 217 have prompted us
to exclude data from FAIR and DRAO respectively for the entire week as well.
However, this week's analysis includes the processing of data from two new
global network stations: NLIB (North Libery, Iowa, USA) and WEST (Haystack
Observatory; Westford, Massachusetts, USA). Keeping in line with our usual
practices, data from these stations were deweighted for week 686. The
following nominal coordinates were assumed, and the station locations were
estimated (unconstrained) each day:
NLIB: X = -130928.4000 m, Y = -4762296.8000 m, Z = 4226863.1000 m
WEST: X = 1492233.0160 m, Y = -4458088.2540 m, Z = 4296047.9700 m
According to the file gpstd.txt obtained from tycho.usno.navy.mil, A-S testing
occurred during "27 Feb 2200 UT to 28 Feb 0200 UT" (days 058, 059). All cross-
correlated data were included in our processing. Because of our 30-hour
analysis interval, the following measures were taken for February 28 and March 1
(days 059 and 060) ONLY:
(1) we only accepted data above 20 degrees elevation (instead of the usual
15 degrees);
(2) pseudorange data were greatly deweighted relative to the carrier phase
(relative weight ratio of 10**-8 instead of the usual 10**-4).
WARNING: Data from PRN11/GPSO8 have been deweighted for the entire GPSweek 686.
WARNING: Due to a the maneuver of PRN14/GPS14, data from this satellite have been deleted for day 064, and deweighted for day 065.
WARNING: Data from PRN22/GPS22 have been deweighted for the entire GPSweek 686.
WARNING: Data from DRAO, FAIR, and MCMU have been excluded for GPSweek 686.
JPL LODR TABLE GPS week 686 (1993 Feb 28 - Mar 06)
MJD LODR +/-
(ms/day)
49046.5 2.02 0.08
49047.5 2.75 0.07
49048.5 2.37 0.06
49049.5 2.18 0.06
49050.5 2.20 0.06
49051.5 2.32 0.07
49052.5 2.33 0.07
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 686 (1993 Feb 28 - Mar 06)
MJD X Y UT1R-UTC XSIG YSIG UTSIG RMS XYC XUC YUC STA SAT PASS
'' '' sec '' '' sec
49046.5 .17663 .21495 -.09079 .00026 .00037 .00000 .0 .16 .00 .00 30 22 0
49047.5 .17620 .21452 -.09351 .00024 .00033 .00000 .0 .16 .00 .00 30 22 0
49048.5 .17363 .21282 -.09624 .00015 .00018 .00000 .0 .13 .00 .00 31 22 0
49049.5 .17264 .21145 -.09898 .00015 .00016 .00000 .0 .11 .00 .00 32 22 0
49050.5 .17143 .21002 -.10173 .00015 .00017 .00000 .0 .10 .00 .00 32 22 0
49051.5 .16966 .20855 -.10449 .00020 .00023 .00000 .0 -.01 .00 .00 32 21 0
49052.5 .16832 .20696 -.10725 .00018 .00020 .00000 .0 .04 .00 .00 33 22 0
END UTPM TABLE
The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 686:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]
JPL ORBIT REPEATABILITY TABLE GPS week 686 (1993 Feb 28 - Mar 06)
93 2 28 93 3 1 93 3 2 93 3 3 93 3 4 93 3 5 93 3 6
prn 3d rss (m)
1 2.54 0.61 0.57 0.45 0.46 0.41 0.66
2 2.98 0.59 0.31 0.37 0.77 0.24 0.33
3 1.88 1.56 0.68 0.27 0.47 0.28 0.41
11 1.74 1.22 0.69 1.29 2.48 1.47 1.56
12 8.25 0.56 0.64 0.61 1.51 0.88 0.40
13 1.37 0.71 0.67 0.48 0.68 0.84 0.84
14 2.81 1.09 0.48 0.26 0.2 (not used) 6.5
15 1.34 0.36 0.32 0.50 0.67 0.39 0.45
16 7.13 1.30 0.26 0.47 0.39 0.15 0.50
17 5.16 1.76 0.54 0.18 0.32 0.22 1.10
18 5.97 0.61 0.84 0.45 0.34 0.23 0.83
19 5.24 0.42 0.22 0.22 0.55 0.34 0.51
20 6.71 2.10 1.31 0.59 0.49 0.53 0.86
21 1.57 0.68 0.56 0.61 1.39 0.66 0.60
22 990.1 1092.10 1540.22 80.22 1397.38 1343.28 35.69
23 2.83 0.68 0.55 0.41 0.60 0.57 0.97
24 1.86 0.77 0.54 0.40 0.39 0.53 0.67
25 4.76 1.95 3.11 0.56 0.73 0.57 0.59
26 1.99 0.88 0.30 0.26 0.56 0.29 0.38
27 3.30 0.38 0.24 0.18 0.20 0.31 0.40
28 0.65 0.27 0.84 0.28 0.86 0.42 0.66
29 2.52 1.10 1.47 0.64 0.89 0.90 0.77
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 28 93 3 1 93 3 2 93 3 3 93 3 4 93 3 5 93 3 6
prn 3d rss (m)
1 11.4 11.2 11.0 11.5 14.2 11.5 12.2
2 12.8 7.2 8.2 11.9 7.9 7.4 7.0
3 7.1 6.09 9.6 11.7 8.7 7.0 10.6
11 9.4 7.1 10.0 11.8 9.9 12.5 10.9
12 24.5 21.7 12.8 11.7 29.9 31.2 20.5
13 4.7 3.7 3.4 2.9 7.6 8.0 3.6
14 13.3 12.0 12.6 13.0 13.7 (not used) 21.5
15 3.9 4.8 8.7 4.4 3.9 6.7 7.6
16 9.9 6.9 7.7 6.7 18.7 5.2 6.6
17 9.1 7.5 6.8 11.1 7.7 7.5 7.0
18 11.8 10.1 12.7 10.3 12.3 10.2 13.1
19 7.5 3.5 6.9 6.7 5.2 3.7 3.9
20 7.1 6.6 6.6 7.4 8.0 5.8 6.0
21 8.0 8.6 7.0 5.0 6.4 7.6 8.6
22 9865.7 6549.1 561.7 271.5 462.8 717.2 824.7
23 12.3 18.7 13.2 6.8 7.1 5.6 6.2
24 9.7 10.7 11.3 13.2 9.6 6.5 7.4
25 8.4 12.1 10.4 8.2 9.3 8.6 10.2
26 8.9 6.2 4.7 5.4 10.4 6.7 8.5
27 5.2 5.2 5.0 5.2 4.9 8.8 5.7
28 8.0 9.7 4.6 10.1 7.1 6.4 4.9
29 13.9 15.4 16.6 17.6 13.1 16.7 17.7
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 686 (1993 Feb 28 - Mar 06)
93 2 28 93 3 1 93 3 2 93 3 3 93 3 4 93 3 5 93 3 6
site % data
ALBH 91 92 103 102 102 87 98
ALGO* 89 90 101 89 99 86 95
GOLD 85 91 87 89 90 82 93
GRAZ 16 81 101 101 92 47 56
HART* 91 92 104 104 104 88 92
HERS 88 90 103 104 103 89 93
JPLM 91 92 105 105 106 91 101
KOKB* 91 94 107 107 107 91 98
KOSG 88 90 104 105 104 91 99
KOUR 87 89 111 107 105 86 96
MADR* 82 59 98 99 100 63 91
MASP 84 87 99 100 100 84 91
MATE 8 78 98 99 99 77 84
METS 87 91 102 100 102 90 90
NLIB 0 0 0 5 12 71 82
NYAL 0 77 119 120 111 0 28
ONSA 82 76 91 93 95 86 84
PAMA 89 87 95 98 99 84 91
PIE1 93 94 104 103 100 83 89
QUIN 65 0 0 0 0 19 88
RCM2 77 92 105 105 87 29 85
SANT* 94 96 108 108 106 89 99
STJO 86 88 102 102 99 81 92
TAIW 93 94 108 107 103 74 83
TIDB 90 92 103 101 101 89 97
TROM* 97 99 112 111 102 60 104
USUD 88 90 106 106 106 88 96
WEST 88 88 98 100 100 86 96
WETT 88 89 102 102 102 88 96
YAR1* 0 0 63 107 109 93 102
YELL 92 94 107 106 107 92 103
_______________________
*Indicates fiducial site.
END GROUND STATION INCLUSION TABLE
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