From David Fri Mar 4 11:55:25 1994 From: David (David) Date: Fri, 4 Mar 1994 11:55:25 PST Subject: [IGSREPORT-0822] JPL Analysis Report (week 737) Message-ID: ****************************************************************************** IGS Electronic Report Fri Mar 4 11:55:25 PST 1994 Message Number 0822 ****************************************************************************** Author: David C. Jefferson Subject: JPL Analysis Report (week 737) ****************************************************************************** JPL ANALYSIS REPORT GPS-WEEK 0737 (DAYS 51-57, DATES 1994 Feb 20 - Feb 26) ****************************************************************************** Submitted by the JPL IGS/FLINN Analysis Team: J F Zumberge, D C Jefferson, M B Heflin, M M Watkins, F H Webb all at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109. Files listed below are available in Unix compressed format and can be retrieved using anonymous ftp to sideshow.jpl.nasa.gov (128.149.70.41), directory pub/jpligsac/0737. These files have also been sent to the CDDIS. ______________________________________________________________________________ filename contents ______________________________________________________________________________ jpl07377.sum This text file. jpl07377.erp Earth rotation parameters for GPS week 737. jpl0737[0-6].sp3 GPS ephemerides for GPS week 737, sp3 format. ______________________________________________________________________________ Anti-spoofing has been in effect since day 031 (Jan 31). All analyses were done using our current A-S strategy; see jpl07347.sum for details. According to IGS Mail Message #510, "ALGO Domes # 40104M002 was down from Feb 23 (DOY 54) 12:00 UT to Feb 25 (DOY 56) 14:00 UT." For these three days, FAIR was used as the reference frequency standard instead of ALGO. Also, ALGO was not used as a fiducial during this period. This week's analysis includes the processing of data from two new global network stations: AREQ (Arequipa, Peru) and TSKB (Tsukuba, Japan). The following nominal coordinates were assumed, and the station locations were estimated (unconstrained) each day: AREQ: X = 1942790.4000 m, Y = -5804032.5000 m, Z = -1796910.7000 m TSKB: X = -3957197.5268 m, Y = 3310201.2519 m, Z = 3737714.9041 m Beginning this week, we have changed the method of calculating percentages of data used in our Ground Station Inclusion Table. Previously, these values were calculated based on a fixed number of expected measurements per site, which was arrived at by monitoring trends in several weeks of analyses (see jpl06787.sum for original details). We now calculate this number on a daily basis according to the following semi-empirical formula: (1 - sin k) D m = 0.227 * T * ------------- * --- * d , (1 - sin 15) t where T is the number of satellites, k is the elevation cutoff in degrees, D is the total data arc, t is the decimation interval, and d the number of data types. [As a reminder, for our AS strategy, k = 20 degrees and d = 1 (phase only)]. WARNING: FAIR (not ALGO) was used as the reference clock for days 054-056. WARNING: ALGO was not used as a fiducial (constrained) site for days 054-056. JPL LODR TABLE GPS week 737 (1994 Feb 20 - Feb 26) MJD LODR +/- (ms/day) 49403.5 2.24 0.01 49404.5 2.30 0.02 49405.5 2.36 0.01 49406.5 2.45 0.01 49407.5 2.49 0.01 49408.5 2.62 0.02 49409.5 2.68 0.01 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 737 (1994 Feb 20 - Feb 26) MJD X Y UT1R-UTC XSIG YSIG UTSIG RMS XYC XUC YUC STA SAT PASS '' '' sec '' '' sec 49403.5 .12744 .45090 .06949 .00011 .00012 .00000 .0 .13 .00 .00 41 26 0 49404.5 .13024 .45056 .06681 .00013 .00014 .00000 .0 .02 .00 .00 45 26 0 49405.5 .13302 .44982 .06413 .00010 .00012 .00000 .0 .05 .00 .00 41 26 0 49406.5 .13578 .44988 .06144 .00009 .00010 .00000 .0 .06 .00 .00 42 26 0 49407.5 .13830 .44989 .05876 .00010 .00011 .00000 .0 .08 .00 .00 42 26 0 49408.5 .13981 .44917 .05608 .00012 .00014 .00000 .0 .05 .00 .00 40 26 0 49409.5 .14099 .44842 .05340 .00011 .00011 .00000 .0 .08 .00 .00 38 26 0 END UTPM TABLE The following table indicates the "3-dimensional orbit repeatability", as defined in IGS Mail Message 37, for GPS week 737: ["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)] JPL ORBIT REPEATABILITY TABLE GPS week 737 (1994 Feb 20 - Feb 26) 94 2 20 94 2 21 94 2 22 94 2 23 94 2 24 94 2 25 94 2 26 prn 3d rss (m) 1 0.86 0.35 0.47 0.71 0.82 0.49 0.86 2 0.80 0.69 0.71 1.04 0.77 1.07 1.00 3 0.50 0.52 0.63 0.55 0.53 0.63 0.43 4 0.62 0.74 0.33 0.77 0.40 0.81 0.68 5 1.29 1.12 0.81 0.96 0.97 1.10 0.91 7 0.57 0.73 0.61 0.75 0.63 0.89 1.02 9 0.48 0.59 0.38 0.38 0.33 0.76 0.73 12 0.56 0.58 0.33 0.24 0.29 0.71 0.65 13 0.92 0.72 0.48 0.53 0.59 0.88 0.98 14 1.44 1.24 1.17 1.14 0.68 0.70 1.60 15 0.51 0.40 0.40 0.39 0.38 0.63 0.66 16 1.54 1.40 1.31 0.97 0.64 1.50 1.96 17 0.61 0.78 0.57 0.62 0.57 0.97 0.93 18 0.47 0.52 0.53 0.52 0.57 0.82 1.25 19 0.60 0.34 0.32 0.46 0.26 0.69 0.72 20 0.98 0.83 0.54 0.48 0.77 1.15 1.11 21 0.68 0.60 0.41 0.84 0.92 0.61 0.83 22 0.97 1.00 0.93 0.64 1.14 1.53 1.41 23 0.79 1.03 0.91 1.00 0.85 0.98 0.70 24 0.61 0.43 0.45 0.70 0.24 0.77 0.45 25 1.05 1.00 1.18 0.48 0.57 1.92 1.60 26 0.83 0.69 0.79 0.72 0.39 0.81 0.67 27 0.29 0.49 0.49 0.37 0.32 0.81 0.85 28 0.84 0.85 1.05 0.86 0.61 0.94 1.4 29 0.37 0.67 0.71 0.60 0.61 0.77 0.70 31 0.74 0.93 0.75 0.65 0.63 0.76 1.02 _______________________ 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 94 2 20 94 2 21 94 2 22 94 2 23 94 2 24 94 2 25 94 2 26 prn 3d rss (m) 1 9.5 8.4 7.9 7.4 8.3 9.0 8.4 2 9.8 10.2 7.8 7.1 7.7 11.1 5.7 3 9.6 11.7 12.4 14.1 12.7 11.7 11.9 4 14.9 15.2 13.7 13.3 11.6 11.2 10.1 5 11.0 9.3 8.8 7.6 6.5 7.4 8.7 7 5.6 5.7 5.6 4.9 4.3 4.2 3.3 9 5.1 4.8 4.2 5.0 5.8 4.7 3.8 12 2.8 3.1 4.3 5.1 8.2 7.8 7.2 13 3.3 4.7 5.2 3.5 5.0 6.0 2.8 14 6.2 7.4 7.3 7.1 8.6 5.1 8.5 15 3.9 2.6 3.8 3.2 3.3 3.8 4.2 16 9.2 6.6 6.2 9.5 10.1 6.1 4.7 17 3.9 4.8 4.2 4.1 5.5 3.8 4.4 18 6.7 10.8 4.3 10.0 9.2 8.0 6.0 19 5.4 4.7 6.7 6.5 5.1 7.1 7.4 20 4.2 4.6 5.3 5.0 4.9 4.7 4.5 21 7.9 8.1 8.6 8.1 8.2 4.1 3.3 22 9.3 8.2 9.6 8.0 5.9 14.7 3.6 23 19.1 15.4 15.0 17.0 19.7 21.6 20.3 24 5.6 7.9 9.4 9.0 8.8 7.2 5.2 25 4.3 5.2 5.4 6.1 4.8 5.3 7.5 26 3.0 3.1 3.5 3.4 3.2 3.4 3.5 27 7.5 8.7 10.4 9.0 7.4 7.2 6.3 28 5.8 3.6 3.7 3.9 4.2 3.7 3.4 29 4.6 4.4 4.8 4.2 2.8 2.6 2.7 31 4.9 5.0 5.1 4.8 4.2 5.1 4.2 _______________________ END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES The following tables, as explained in IGS Report Nos. 99 and 295, indicate the amount of global network tracking data used in this week's analysis: JPL SITE SUMMARY TABLE (no. stations) GPS week 737 (1994 Feb 20 - Feb 26) 94 2 20 94 2 21 94 2 22 94 2 23 94 2 24 94 2 25 94 2 26 Fiducial 10.4 9.9 9.4 9.4 8.7 8.9 10.1 Total 34.7 37.5 35.6 35.8 34.7 31.4 29.3 END SITE SUMMARY TABLE JPL GROUND STATION INCLUSION TABLE GPS week 737 (1994 Feb 20 - Feb 26) 94 2 20 94 2 21 94 2 22 94 2 23 94 2 24 94 2 25 94 2 26 site % data ALBH 105 105 106 95 107 106 103 ALGO* 104 94 93 51 0 44 101 AREQ 0 107 0 0 0 0 0 BRMU 85 89 91 86 96 85 85 DRAO 108 108 108 97 109 109 98 FAIR* 84 77 74 80 79 64 71 FORT 0 98 99 102 44 91 94 GODE 99 99 100 102 101 101 98 GOLD^ 89 88 79 80 82 75 77 GRAZ 82 78 78 82 92 75 0 HART* 69 66 92 85 80 52 86 HERS 83 79 0 84 79 49 72 HOBA 103 102 98 97 88 97 101 JPLM 85 82 77 90 76 76 67 KIRU 105 102 101 104 94 0 0 KOKB* 84 87 99 99 77 78 72 KOSG* 93 25 0 0 0 0 10 KOUR 95 99 98 98 89 0 0 MADR* 79 83 75 37 29 67 68 MASP 92 97 99 100 90 0 0 MATE 71 65 62 42 51 60 0 MCMU 24 92 96 95 96 83 64 MDO1 105 104 107 104 103 83 86 METS 80 71 85 86 88 85 82 NLIB 75 85 88 85 85 78 44 NYAL 105 111 111 112 112 110 108 ONSA 91 101 91 0 85 83 0 PAMA 86 86 89 90 84 72 83 PIE1 92 96 102 103 103 101 98 QUIN 92 101 82 95 104 105 101 RCM5 101 97 94 104 104 73 17 SANT* 88 86 80 78 82 73 72 STJO 99 102 102 102 100 85 80 TAIW 80 70 86 88 84 92 72 TIDB* 85 81 74 73 76 70 90 TROM* 0 60 105 107 107 105 102 TSKB 0 33 82 108 106 106 104 USUD 105 108 103 102 98 95 94 VNDP 82 93 88 82 31 52 71 WEST 103 100 100 102 103 100 100 WETT* 80 65 0 73 80 76 72 YAR1* 86 70 77 84 81 83 89 YELL* 100 104 93 96 98 102 101 _______________________ *Indicates fiducial site; #indicates deweighted site. ^GOLD used as a fiducial for days 051-053, 057 only. END GROUND STATION INCLUSION TABLE As described in IGS Report No. 634, the table below indicates the repeatability of clock solutions for all satellites and stations used in this week's analysis: JPL CLOCK REPEATABILITY TABLE GPS week 737 (1994 Feb 20 - Feb 26) 94 2 20 94 2 21 94 2 22 94 2 23 94 2 24 94 2 25 94 2 26 comp log10(rms/ps) PRN01 4 4.1 6 4 3.6 8.2 8.2 PRN02 4.1 3.9 6 4 5.7 8.2 8.2 PRN03 4.2 4.5 6 4 5.1 8.2 8.2 PRN04 4.1 4.2 6 4 5.3 8.2 8.2 PRN05 4.0 4.3 6 4 5.4 8.2 8.2 PRN07 3.8 4.0 6 4 5.5 8.2 8.2 PRN09 4.2 4.2 6 4 5.7 8.2 8.2 PRN12 4.4 4.0 6 3 5.4 8.2 8.2 PRN13 4.5 4.4 6 4 5.3 8.2 8.2 PRN14 4.2 4.0 6 4 4.1 8.2 8.2 PRN15 3.7 4.4 6 5 5.5 8.2 8.2 PRN16 4.0 4.3 6 4 5.2 8.2 8.2 PRN17 4.4 4.4 5 4 4.9 8.2 8.2 PRN18 4.0 4.2 6 3 3.7 8.2 8.2 PRN19 3.9 3.8 6 3 5.1 8.2 8.2 PRN20 4.0 4.2 6 4 5.2 8.2 8.2 PRN21 3.8 4.3 6 3 4.9 8.2 8.3 PRN22 4.2 4 6 3 3.9 8.3 8.2 PRN23 3.9 3.9 6 3 5.1 8.2 8.2 PRN24 4.2 4.3 6 4 5.2 8.2 8.2 PRN25 3.9 4 6 4 3.4 8 8.2 PRN26 4.0 3.9 6 3 5.1 8.2 8.2 PRN27 3.6 3.9 6 3 5.4 8.2 8.2 PRN28 3.8 4 6 3 4.7 8 8 PRN29 4.1 4.3 6 4 4.9 8.2 8.2 PRN31 3.8 3.8 6 4 4.9 8.2 8.2 ALBH 3.6 4.0 6 4 5 8.2 8.2 BRMU 3.4 3.6 6 4 4.9 8.2 8.2 CANB 4.1 4.3 6 4 5.0 8.2 8.2 FAIR 4.0 3.9 4 FORT 4 6 4 4 8.2 8.2 GODE 3.7 3.9 6 4 5.0 8.2 8.2 GOLD 3.9 4.1 6 3 5.4 8.2 8.2 GRAZ 4 4.2 6 4 3.9 5 HART 4 4 6 4 3.8 8 8.2 HARV 3.8 4.0 6 4 5.2 8.2 8.2 HERS 3.8 3 4 5.2 8.2 8.2 HOBA 4.2 4.3 6 4 5.2 8.2 8.2 JPLM 3.6 3.9 6 4 5.4 8.2 8.2 KIRU 4 3.9 6 4 4 KOKB 4.3 4.0 6 3 4.3 8.2 8.2 KOSG 3.7 4 4 KOUR 4.1 4.1 6 4 3 MADR 3.6 3.8 6 5 8.2 8.2 MASP 4.0 4.2 6 4 4 MATE 4 4.0 6 5 5 MCMU 4 4.2 6 4 5.2 8.2 8 MDO1 3.5 4.0 6 4 5.4 8.2 8.2 METS 3.8 4.2 6 4 4.3 8.2 8.2 NALL 3.7 4.1 6 3 5.3 8.2 8.2 NLIB 3.9 3.8 7 4 6.8 8.2 8 ONSA 3.7 4 5 6 PAMA 4.4 4.4 6 4 5.3 8.2 8.2 PENT 3.7 4.1 6 4 5 8.2 8.2 PIE1 3.5 3.8 6 4 5.4 8.2 8.2 QUIN 3.5 3.9 6 3 5.2 8.2 8.2 RCM5 3.9 4.1 6 4 4.8 6 4 SANT 3.9 4.2 6 3 5.3 8.2 8.2 STJO 4.3 4.1 6 4 5.1 6 8.2 TAIS 4 4.3 6 4 5.4 8.2 8 TROM 4 6 3 4.2 8.2 8.2 TSKB 6 4 4.7 8.2 8.2 USUD 4.0 4.1 6 4 4.7 8.2 8.2 VNDP 3.9 4.1 6 4 3 8 8.2 WEST 3.6 4.0 6 4 4.9 8.2 8.2 WETB 3.7 4 4 4.9 8.2 8.3 YAR1 4.1 4.3 6 4 5.4 8.2 8.2 YELL 3.9 4.0 6 4 5.4 8.2 8.2 _______________________ END CLOCK REPEATABILITY TABLE