From: Wolfgang Soehne Author : W. Soehne Date: 04 Dec 1998 17:47:31 Subject: [IGEXMail-0102] Subject ****************************************************************************** IGEX Electronic Mail 04-Dec-1998 17:47:31 Message No 0102 ****************************************************************************** Author: Wolfgang Soehne Subject: Subject: Wk 0983 GFZ IGEX Analysis Report Dear colleagues, we like to present our results of GLONASS orbits for GPS week 0983. Although the computed orbit overlaps are not very good, in general, a comparison of the GFZ GLONASS orbits with the CODE GLONASS orbits for few days of GPS week 0981 shows a better agreement: RMS for DAY PRN 298 299 300 ---------------------- 3 19 63 50 4 25 42 58 6 74 76 66 9 220 26 42 10 - - - 11 48 63 75 12 21 50 50 13 19 23 23 14 - - - 15 58 40 12 16 - - - 17 121 53 39 18 161 93 23 20 51 102 182 21 - - - 22 17 19 43 Author : W. Soehne Subject: Wk 0983 GFZ IGEX Analysis Report ****************************************************************************** GFZ IGEX ANALYSIS REPORT GPS-WEEK 0983 (DAYS 312-318, DATES 08-11-98 TO 14-11-98) ****************************************************************************** Submitted by: GeoForschungsZentrum Potsdam (GFZ) Telegrafenberg A17, D-14473 Potsdam, Germany e-mail:gendt@gfz-potsdam.de fax: (0331) 288 1111 tel: (0331) 288 1114 SOLUTION CHARACTERISTICS - Software used : EPOS.P.V2 - Data used: - undifferenced carrier phases - 24 h arc solutions - only stations with combined GPS and GLONASS dual frequency measurements or with GLONASS dual frequency measurements are used - Earth rotation parameters are fixed to their initial values - GPS orbits from the IGS final solution are introduced and fixed (except eclipsing GPS satellites - Coordinates of only one station are fixed to their initials in the determination of ORBITS - Adjusted parameters: - state vector of GLONASS satellites (and eclipsing GPS satellites) - coordinate corrections - tropospheric zenith path delay (4 h) - y-bias, solar radiation scaling factor - ambiguities - STA and SV clock parameters of each observation epoch - one clock bias per station and day CLOCK ESTIMATION: KR0G is used as time reference no offset and trend correction is performed ORBITS REPEATABILITY (cm): (mean component error rms =sqrt((xrms**2 + yrms**2 + zrms**2)/3) ) DAY 1 (24 h) pred. DAY 2 (24 h) |------------------------|--------| |------------------------| 7.75-hour overlap: |xxxxxxxx| --------------------------------------------------- RMS for DAY PRN 312 313 314 315 316 317 318 319 ------------------------------------------------------- 3 2175 42 98 - 112 150 257 289 4 323 494 25 60 - 187 151 258 6 635 343 277 356 128 103 - 133 9 141 359 235 303 138 319 98 63 10 - - - - - - - - 11 1366 243 59 81 49 40 119 529 12 - - - - - - - - 13 754 459 161 17 46 92 59 112 14 - - - - - - - - 15 516 646 20 437 257 83 42 78 16 - - - - - - - - 17 155 161 194 128 151 195 83 128 18 8 18 88 112 56 38 19 37 20 262 389 102 85 175 194 68 173 21 - - - - - - - - 22 121 316 279 20 126 111 164 509 STATIONS USED BY GFZ (P - processed) Sampling rate: 5 minutes IGS INTERNAL CODE STA# 311 312 313 314 315 316 317 318 319 ---------------------------------------------------- wtzg 951001 P P P P P P P P sang 962001 P thu2 963001 P P P P P P zimz 965001 P P P P P P P P P brug 967001 P P P P P P P P P borg 968001 P P P P P P P P godz 969001 P P P P P P P csir 970001 P reyz 971001 P P dlra 972001 P P P P P P P P 3sna 973001 P P P P P irkz 976001 P P P P P P P P P khab 977001 P P P P P P P herp 979001 P gatr 980001 P P P P P P P P krog 982001 P P P P P P P P P metz 983001 P P P P mtka 987001 P P P P lds1 988001 P P P P P P P vsld 990001 P P P P P P lrba 991001 P P P P P P P yarr 992001 P P P P P os0g 993001 P P P P P sl1x 995001 P P P P P P P P P usnx 996001 P nplc 997001 P P bipd 999001 P P P P P P P P P