From ESOC Thu Dec 23 08:39:24 1993 From: ESOC (ESOC) Date: Thu, 23 Dec 1993 8:39:24 PST Subject: [IGSREPORT-0671] Subject Message-ID: IGS Electronic Report Thu Dec 23 8:39:24 PST 1993 Message Number 0671 ****************************************************************************** Author: ESOC IGS-team Subject: Subject: ESA07277.SUM Subject: ESA07277.SUM ------------------------- ANALYSIS CENTRE: ESA/ESOC ------------------------- OUTLINE OF THE ESTIMATION OF GPS-ORBITS AND EARTH ROTATION PARAMETERS AT THE ESOC PROCESSING CENTRE FOR IGS J.M.Dow, T.Martin-Mur, J.Feltens, C.Garcia-Martinez Description of analysis for period 1993 Dec 12 - Dec 18 (week 0727) 1. SOFTWARE USED: GPSOBS/BAHN-Version 5 2. MODELS USED AND PARAMETERS ESTIMATED/FIXED: For a description of models and parameters used ==> see IGS - Mail 51 For updates of the models and parameters used ==> see IGS - Mail 114 and see IGS - Rep. 224,277 3. REMARKS: - To be in agreement with IGS mail 414 we are fixing KOSG now in our IGS processing instead of estimating it. According to IGS mail 417 its is recommended not to fix YELL - so we esti- mating it now. This has been changed with the beginning of week 0727. As before, we using the ITRF92 coordinates (IGS mail 263). See corresponding changes of the status of KOSG and YELL in the ground stations table. To verify the influence of this change, we have also repeated week 0726 with KOSG = 'F' and YELL = 'e'. The mean RMS in position between the orbits thus obtained and the original orbits with KOSG = 'e' and YELL = 'F' are in the range of 3-5 cm and in one case 10 cm. The differences in the ERPs are between 0.01 and 0.08 masec. - SV-37/PRN07 has been manoeuvered on day 350. We estimated an along track velocity increment of +43.5 mm/sec at 09:14 UTC. - Over the days 346, 347, 348 our Yp-polar motion curve shows a deflection from a smooth curve having its maximum on day 347 with 1.5 masec. We cannot clearly recognize the reason for this. However, some stations in the pacific area show higher residuals at that days than usual. - The ESOC IGS team wishes all of you and your families a M E R R Y C H R I S T M A S * * * * o * * O * * O at O * * O@@@O * * O@@#@@O * * O@#@O * * @ * | (IIIIIIIII) IIIIIIIII IIIIIIIII IIIIIIIII IIIIIIIII IIIIIIIII \\\\\\\\\\\|/////////// \\\\\\\\\\|////////// --------------------------- and a H A P P Y N E W Y E A R 1 9 9 4 4. GROUND STATIONS: Boucher and Altamimi, IGS workshop Berne 24-27 March'93 IGS/IERS station coordinates in the ITRF91 at 1992.6 _________________________________________________________________ GPSweek|ALGO GOLD KOKB MADR PAMA SANT TROM YAR1 |f |e |t 0727___| FAIR HART KOSG MASP PERT TAIW USUD YELL |i |s |o |DAY| FORT KIRU KOUR MATE RCM5 TIDB WETT |x.|t.|t. ---|---|------------------------------------------------|--|--|-- |346| FFe FFe FFe Fee eee FeF FeF Fe |12|11|23 |347| FFe FFe FFe Fee eee FeF FeF Fe |12|11|23 |348| FFe FFe FFe Fee eee FeF FeF Fe |12|11|23 |349| FFe FFe FFe Fee eee FeF FeF Fe |12|11|23 |350| FFe FFe FFe Fee eee FeF FeF Fe |12|11|23 |351| FFe FFe FFe Fee eee FeF FeF Fe |12|11|23 |352| FFe FFe FFe Fee eee FeF FeF Fe |12|11|23 with: "F" ... coordinates of ground station kept fixed, "e" ... coordinates of ground station estimated, "-" ... ground station not included on that day. 5. ORBIT FIT MINUS EXTRAPOLATION FROM PREVIOUS DAY, RMS IN \DAY| 346 347 348 349 350 351 352 \ | \ | SAT\| ----|------------------------------------------- 02 | 55 48 62 48 52 68 55 03 | 91 42 66 73 38 61 141 12 | 60 64 85 61 84 102 185 13 | 73 64 44 51 51 61 85 14 | 29 89 124 33 49 51 171 15 | 75 119 159 52 47 64 125 16 | 54 58 46 25 49 98 58 17 | 63 43 39 67 60 57 98 18 | 39 46 52 46 66 62 73 19 | 65 75 76 69 63 67 116 20 | 93 113 78 75 70 54 53 21 | 29 53 81 80 42 81 100 22 | 72 49 190 82 122 76 121 23 | 71 45 27 82 85 83 194 24 | 63 92 52 61 60 77 87 25 | 84 93 96 60 50 61 79 26 | 36 35 27 22 21 62 111 27 | 66 83 54 101 88 80 117 28 | 57 115 152 56 78 95 108 01 | 74 44 100 48 68 59 70 29 | 74 39 51 39 61 83 170 31 | 123 60 98 105 147 88 284 07 | 84 63 80 58 ----- ----- 120 09 | 106 69 120 77 106 49 242 05 | 68 38 200 56 75 68 90 04 | 78 81 153 78 88 107 142 6. PRODUCTS GENERATED: The following products are generated and stored in CDDIS at NASA/GSFC: ESA0727*.EPH - Precise GPS orbits and clocks, * = day of the week (0-6) ESA07277.ERP - Earth rotation results for week 0727 (including DUT1R) ESA07277.SUM - This summary file End of Message