****************************************************************************** dorisreport 24-May-2006 22:49:02 Message No 0594 ****************************************************************************** Author: Pascal Willis Subject: IGN/JPL DORIS Report for week 1371 = 06106 ============================================================== Summary report for weekly DORIS IGN/JPL Analysis solution GPS week number: 1371 from 16-04-2006 to 22-04-2006 DORIS name (using day of start): 06106 Days of year: from 2006/106 to 2006/112 ============================================================== Author: Pascal Willis 1) Contacts =========== Email pascal.willis@ign.fr Phone 1-818-393-4748 FAX 1-818-393-4965 2) Products =========== All the following products are available at the CDDIS data center ftp cddis.gsfc.nasa.gov weekly sinex in free-network pub/doris/products/sinex_series/ignwd/ign06106wd05.snx.Z weekly sinex in ITRF2000 pub/doris/products/sinex_series/ignwd/ign06106wd04.snx.Z geocenter series pub/doris/products/geoc/ign03wd01.geoc.Z Earth Orientation Parameters time series pub/doris/products/eop/ign03wd01.eop.Z 3) Analysis Strategy ==================== The DORIS data have been processed using the Gipsy/Oasis software at the Jet Propulsion Laboratory Suggestions on which solutions should be used or not can be found in pub/doris/products/sinex_series/ign.snx.readme Complete description files can be found at CDDIS at weekly sinex in free-network pub/doris/products/sinex_series/ignwd/ignwd05.snx.dsc weekly sinex in ITRF2000 pub/doris/products/sinex_series/ignwd/ignwd04.snx.dsc geocenter series pub/doris/products/geoc/ign03wd01.geoc.dsc Earth Orientation Parameters time series pub/doris/products/eop/ign03wd01.eop.dsc For references, the following papers are recommended : Willis, P., M. Heflin (2004), External validation of the GRACE GGM01C gravity field using GPS and DORIS positioning results, Geophys. Res. Lett., 31(13), L13616, DOI:10.1029/2004GL020038. Willis, P., C. Boucher, H. Fagard, Z. Altamimi (2005), Applications geodesiques du systeme DORIS a l'Institut Geographique National, Geodetic applications of the DORIS system at the French Institut Geographique National, C.R. Geoscience, 337(7), 653-662, DOI:10.1016/j.crte.2005.03.002. Last changes in the time series data analysis: Week 678 = 93003 : See DORISMail #0288, start of the time series Week 1281 = 04207 : Estimate DORIS wet tropospheric delay per measurement using a randomwalk approch (Psigma = 5 cm per day) no horizontal gradients used yet. See DORISMail #0345 Week 1287 = 04249 : Start using cumulative solution ign04d02 to perform the ITRF2000 transformation (when needed) Week 1293 = 04291 : Start using actual mass information for all satellites (as provided in the new *mass.txt files) instead of nominal values as before Week 1341 = 05261 : Do not estimate the constant term of the relativity correction (this is already done by CNES by modifying the on-board oscillator, exactly like for GPS). Use a cutoff angle of 15 degrees (before that, no cutoff angle was used but now CNES is delivering data at very low elevation. Do not estimate tropospheric correction as random walk anymore. Use 1 parameter per hour (maximum) + 2.5 cm@ 1d as constraint. 4) Global Statistics ==================== GPS week number 1371 from 16-04-2006 to 22-04-2006 Total number of stations = 45 Total number of satellites = 4 Combinations (daily to weekly) CHI2 / DOF = 1.67 The following table only counts DORIS data that have passed CNES preprocesing step Individual daily DORIS statistics Day total_obs rejected valid_obs %_rejected -------------------------------------------------------- 16-04-2006 16727 16 16711 0.1 17-04-2006 16753 12 16741 0.1 18-04-2006 16836 12 16824 0.1 19-04-2006 19699 11 19688 0.1 20-04-2006 21349 67 21282 0.3 21-04-2006 21172 22 21150 0.1 22-04-2006 21356 9 21347 0.0 5) Individual Statistics per satellite ====================================== The following table includes all data that have been kept in the solution (after pre and post-processing) 5.1) Number of observations per satellite ----------------------------------------- day1 day2 day3 day4 day5 day6 day7 --------------------------------------------------------------- ENVISAT 0 0 0 3218 4697 4740 5054 SPOT2 4653 4487 4614 4271 4446 4632 4326 SPOT4 4827 4919 4899 5025 4956 4755 4720 SPOT5 7231 7335 7311 7174 7183 7023 7247 5.2) Doppler residuals per satellite in mm/s -------------------------------------------- day1 day2 day3 day4 day5 day6 day7 -------------------------------------------------------------- ENVISAT 0.000 0.000 0.000 0.416 0.393 0.429 0.378 SPOT2 0.417 0.419 0.438 0.410 0.419 0.463 0.408 SPOT4 0.409 0.409 0.408 0.419 0.420 0.416 0.406 SPOT5 0.364 0.342 0.355 0.382 0.367 0.358 0.349 6) Individual Statistics per station ====================================== 6.1) Stations given in sinex solutions -------------------------------------- The following table includes all DORIS data that were used to generate the weekly DORIS sinex solutions o = station after a break in the DORIS time series day1 day2 day3 day4 day5 day6 day7 --------------------------------------------------------------- ADEB 899 924 877 1289 1247 1291 1275 AMTB 270 264 323 344 365 445 483 ASDB 240 257 246 361 244 336 370 BEMB 1071 1015 999 995 1281 1209 1242 CADB 338 346 323 467 401 384 453 CHAB 488 472 492 604 563 578 658 CROB 222 258 230 270 283 242 275 EASB 327 376 359 342 404 514 407 EVEB 205 179 164 213 263 239 211 FAIB o 639 686 628 740 806 789 856 FUTB 238 311 293 230 331 364 414 GAVB 109 129 179 287 267 189 281 GREB 263 282 296 400 403 455 490 HEMB 230 190 239 268 324 423 215 JIUB 341 375 381 385 393 478 517 KESB 382 367 346 393 499 456 463 KIUB 416 428 430 438 454 515 497 KOLB 395 383 384 533 455 438 547 KRUB 306 288 343 387 414 397 302 LICB 206 185 296 280 302 294 366 MAHB 263 244 286 356 288 305 161 MALB 314 332 304 320 402 391 335 MANB o 302 309 307 371 429 331 433 METB 452 444 480 630 637 649 660 MIAB 299 287 278 371 416 293 415 MONB 382 386 382 398 447 540 489 MORB 348 226 318 396 339 445 436 MSPB 386 329 315 469 472 457 429 PAQB 381 335 0 0 0 0 0 PDMB 334 269 384 485 453 416 441 REUB 222 273 289 302 299 296 385 REZB 433 444 364 473 553 416 550 RIPB 393 370 416 474 460 543 510 ROTB 627 634 632 755 972 854 820 SANB 294 287 359 520 462 414 575 SCRB 325 333 296 386 364 425 313 SODB o 281 325 279 350 349 298 418 SPJB 926 970 976 1203 1277 1254 1289 STJB 396 422 436 409 477 552 575 SYPB 830 826 794 982 1256 1215 1210 THUB 844 931 909 981 1123 1129 1045 TLHA 366 398 387 502 545 377 466 TRIB o 333 346 356 337 540 454 407 YASB 372 377 320 499 599 486 443 YELB 568 557 563 600 715 733 731 6.2) stations rejected from solution ------------------------------------ the following stations were not given in the output sinex solutions : day1 day2 day3 day4 day5 day6 day7 --------------------------------------------------------------- MATB 354 293 294 342 398 375 398 this is due to the lack of data or to some stations related problems as described below MATB 8 11 2005 1 1 2010 antenna fall 6.3) statistics per station and per satellite (stations in sinex) ----------------------------------------------------------------- ENVISAT SPOT2 SPOT4 SPOT5 ------------------------------------- ADEB 1661 1629 1731 3163 AMTB 361 593 612 1080 ASDB 334 522 555 811 BEMB 817 1795 1913 3499 CADB 455 738 797 875 CHAB 585 1019 1161 1327 CROB 281 442 446 723 EASB 301 847 921 907 EVEB 160 354 368 636 FAIB 568 1096 1163 2473 FUTB 270 571 633 853 GAVB 599 0 0 1035 GREB 454 589 676 1047 HEMB 331 375 448 861 JIUB 501 741 727 1143 KESB 478 740 751 1116 KIUB 328 1000 915 1207 KOLB 548 874 941 1009 KRUB 248 669 680 915 LICB 379 427 508 793 MAHB 296 401 528 825 MALB 237 672 751 884 MANB 404 620 684 960 METB 709 688 874 1834 MIAB 402 635 505 966 MONB 499 790 794 1146 MORB 320 634 773 926 MSPB 385 783 782 1071 PAQB 0 246 235 269 PDMB 291 730 757 1135 REUB 351 424 534 878 REZB 496 683 512 1615 RIPB 636 433 737 1500 ROTB 780 914 635 3146 SANB 446 925 775 942 SCRB 420 599 679 942 SODB 351 554 571 962 SPJB 1308 1517 1843 3449 STJB 511 715 941 1273 SYPB 1302 1424 1539 3110 THUB 821 1527 1726 3071 TLHA 500 519 816 1323 TRIB 343 815 835 926 YASB 464 844 997 991 YELB 753 799 896 2193 6.4) statistics per station and per satellite (deleted stations) ---------------------------------------------------------------- ENVISAT SPOT2 SPOT4 SPOT5 ------------------------------------- MATB 339 563 651 1044 7) External Comparisons ======================= (for information) 7.1) Stations coordinates ------------------------- Looking at the transformation results Comparing with solution ign04d02 at epoch of observations Weekly DORIS residuals in mm N E V ------------------- WRMS 18.3 17.8 18.5 7.2) Geocenter estimation -------------------------- Geocenter estimation as provided by 7-parameter transformation to ign04d02 TX = -21.8 +- 2.0 mm TY = 13.4 +- 1.9 mm TZ = 51.3 +- 1.8 mm 7.3) Scale factor ----------------- Scale factor / ITRF2000 using reference ign04d02 S = -1.8 +- 0.3 ppb 7.4) Earth Orientation Parameters --------------------------------- External comparison with JPL/GPS EOP values number of days compared X_POLE_RMS (mas) Y_POLE_RMS (mas) ------------------------------------------------------------------ 7 1.22 0.62 ============================================================== Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr