****************************************************************************** dorisreport 10-May-2007 05:42:51 Message No 0869 ****************************************************************************** Author: WILLIS Pascal Subject: IGN/JPL DORIS Report for week 1421 = 07091 ============================================================== Summary report for weekly DORIS IGN/JPL Analysis solution GPS week number: 1421 from 01-04-2007 to 07-04-2007 DORIS name (using day of start): 07091 Days of year: from 2007/91 to 2007/97 ============================================================== 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/ign07091wd05.snx.Z weekly sinex in ITRF2000 pub/doris/products/sinex_series/ignwd/ign07091wd04.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. Week 1405 = 06344 : Use GIPSY/OASIS software installed at Institut de Physique du Globe de Paris 4) Global Statistics ==================== GPS week number 1421 from 01-04-2007 to 07-04-2007 Total number of stations = 52 Total number of satellites = 4 Combinations (daily to weekly) CHI2 / DOF = 8.02 The following table only counts DORIS data that have passed CNES preprocesing step Individual daily DORIS statistics Day total_obs rejected valid_obs %_rejected -------------------------------------------------------- 01-04-2007 24494 11 24483 0.0 02-04-2007 23038 9 23029 0.0 03-04-2007 22104 4 22100 0.0 04-04-2007 24480 10 24470 0.0 05-04-2007 24288 1504 22784 6.2 06-04-2007 24310 9 24301 0.0 07-04-2007 24519 2 24517 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 7010 6070 4465 6985 6098 6829 6947 SPOT2 4468 4375 4468 4559 4615 4403 4476 SPOT4 5162 5233 5404 5196 4924 5239 5288 SPOT5 7843 7351 7763 7730 7147 7830 7806 5.2) Doppler residuals per satellite in mm/s -------------------------------------------- day1 day2 day3 day4 day5 day6 day7 -------------------------------------------------------------- ENVISAT 0.403 0.397 0.387 0.395 0.606 0.412 0.419 SPOT2 0.440 0.420 0.408 0.414 0.564 0.419 0.424 SPOT4 0.423 0.414 0.412 0.416 0.519 0.411 0.397 SPOT5 0.365 0.364 0.348 0.365 0.479 0.364 0.377 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 1401 1197 1393 1522 1347 1367 1451 AMTB 579 528 455 574 527 536 523 ARFB 377 472 368 279 347 394 448 ASDB 310 289 323 288 383 302 380 BEMB 1630 1532 1352 1790 1592 1630 1718 BETB 401 302 382 418 441 424 393 CADB 81 0 0 0 0 0 0 CHAB 743 593 693 754 726 725 704 CICB 494 486 485 512 464 475 521 CROB 431 500 420 385 83 0 0 CRPB 0 0 0 0 152 516 421 DIOB 482 471 422 456 533 485 457 DJIB 469 461 349 414 461 497 480 EASB 438 462 469 466 520 473 438 EVEB 269 255 227 322 259 258 238 FAIB o 1059 872 941 1082 974 1072 1072 FUTB 396 282 356 396 404 427 419 GAVB 244 243 213 219 225 217 252 GREB 470 467 503 523 554 464 527 HBMB 533 530 454 478 429 574 503 KIUB 603 626 584 576 600 608 602 KOLB 590 406 530 643 540 545 657 KRUB 431 492 329 424 467 477 447 LICB 391 377 401 309 327 435 467 MAHB 394 362 285 274 280 380 467 MALB 361 395 306 423 471 437 351 MANB o 454 446 412 410 443 473 500 MATB 527 532 348 517 625 460 551 METB 765 657 659 670 718 733 704 MIAB 490 493 358 437 488 457 485 MONB 536 566 509 544 558 607 539 MORB 420 446 420 445 478 402 519 MSPB 528 539 561 612 524 501 546 NOWB 362 302 255 377 329 327 299 PAQB 460 493 404 521 463 454 0 REUB 420 339 340 416 366 418 435 REZB 674 662 746 717 798 694 752 RIKB 380 419 420 436 414 439 411 RIPB 662 615 524 614 598 674 690 ROTB 1103 1137 1118 1096 1025 1081 1093 SALB 502 553 473 450 550 496 448 SANB 513 503 509 548 489 480 564 SCRB 379 431 424 345 382 477 404 SODB o 469 444 425 471 399 446 514 SPJB 1378 1358 1528 1486 1515 1461 1500 STJB 700 716 657 660 759 607 698 SYPB 1396 1103 1196 1366 1297 1354 1354 THUB 1368 1153 1337 1317 1355 1459 1354 TLHA 481 426 634 584 550 549 602 TRIB o 519 524 401 542 632 498 472 YASB 568 591 555 618 579 537 491 YELB 923 797 771 872 859 945 903 6.2) stations rejected from solution ------------------------------------ all available stations were processed and given in the output sinex solutions 6.3) statistics per station and per satellite (stations in sinex) ----------------------------------------------------------------- ENVISAT SPOT2 SPOT4 SPOT5 ------------------------------------- ADEB 3716 1376 1711 3140 AMTB 1206 531 928 1187 ARFB 967 435 541 920 ASDB 795 401 485 765 BEMB 4165 1661 1891 3903 BETB 944 547 681 798 CADB 61 0 0 25 CHAB 1557 1042 1160 1312 CICB 1154 661 760 998 CROB 682 277 339 599 CRPB 418 189 138 403 DIOB 942 812 767 863 DJIB 1026 710 708 940 EASB 1003 742 894 979 EVEB 515 357 314 721 FAIB 2585 993 1239 2529 FUTB 898 509 596 848 GAVB 881 0 0 803 GREB 1328 463 645 1187 HBMB 1141 753 749 983 KIUB 1297 924 1090 1221 KOLB 1167 859 1031 1025 KRUB 1013 621 682 937 LICB 978 571 536 853 MAHB 879 418 435 894 MALB 933 480 686 832 MANB 1188 530 644 958 MATB 1219 521 793 1164 METB 1866 678 820 1758 MIAB 1057 585 622 1065 MONB 1214 771 876 1111 MORB 1001 634 696 950 MSPB 1320 718 769 1130 NOWB 798 314 417 808 PAQB 924 500 600 884 REUB 959 449 519 960 REZB 2152 605 655 1824 RIKB 1115 540 549 903 RIPB 1925 442 600 1574 ROTB 3204 806 827 3048 SALB 1115 655 952 938 SANB 1209 686 698 1170 SCRB 974 509 624 885 SODB 1169 556 672 1031 SPJB 3621 1516 1821 3495 STJB 1627 845 1056 1401 SYPB 3299 1312 1597 3117 THUB 3040 1607 1855 3059 TLHA 1625 442 704 1212 TRIB 1105 865 763 1029 YASB 1306 831 862 1111 YELB 2467 812 872 2188 6.4) statistics per station and per satellite (deleted stations) ---------------------------------------------------------------- ENVISAT SPOT2 SPOT4 SPOT5 ------------------------------------- 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 21.5 20.8 21.2 7.2) Geocenter estimation -------------------------- Geocenter estimation as provided by 7-parameter transformation to ign04d02 TX = -20.9 +- 2.6 mm TY = 10.4 +- 2.9 mm TZ = 12.1 +- 2.6 mm 7.3) Scale factor ----------------- Scale factor / ITRF2000 using reference ign04d02 S = 0.7 +- 0.4 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 10.44 5.80 ============================================================== Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr