From gend at gfz-potsdam.de Wed Jan 28 23:39:52 2004 From: gend at gfz-potsdam.de (Gerd Gendt) Date: Thu, 29 Jan 2004 08:39:52 +0100 (CET) Subject: [IGSMAIL-4812]: New Report on IGS Ultra products Message-ID: ****************************************************************************** IGS Electronic Mail 28 Jan 23:40:07 PST 2004 Message Number 4812 ****************************************************************************** Author: Gerd Gendt Dear IGS community, The IGS is generating since several years Ultra Rapid products. The products comprises adjusted solutions (for a 24 hour data part) for orbits, ERPs and clocks, and predictions of those parameters for the next 24 hours. The update cycle is now 12 hours and therefore the first half of the prediction is the most interesting part (a switch to a 6 hour repetition is planned in near future). To give the user community an overview over the quality of the predicted orbits, the most used product, starting with week 1250 reports showing the orbit quality will be distributed as an IGS Report each week. For all satellites the SP3 files contain accuracy codes, which should be used for weighting. It is especially important for the Ultra predicted orbits, because of their larger variation in quality compared to the other IGS orbit products (Rapids and Finals). For users, which are interested in the adjusted data part, it should be mentioned that those products have already a high quality (e.g. orbit differences to the Rapids of about 2 to 3 cm for all satellite). Best regards Gerd Gendt ------------------------------------------------------------------------------------------ Example for week 1251 Author: AC Coordinator / GFZ Potsdam Ultra Rapid IGS Orbit Comparison - Week 1251 (2003 DOY:362) Contacts: G. Gendt (gendt-potsdam.de), Th. Nischan (nisn-potsdam.de) Table 1. Weekly summary of the comparison between IGS Ultra Rapid predicted orbits and IGS Rapid orbits. Eclipsing satellites are flagged with "E" beside the PRN number "MED" stands for median of the satellite RMS. (only the first 12 hours of the prediction are considered) (for more information see www.gfz-potsdam.de/igsacc) Units: cm. --------|----------------------------------------------------------------| date/PRN| 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 17 | --------|----------------------------------------------------------------| 12510_00| 9E 3 4 12E 2 6 3 3 8 2 8E 6 8 25E 2 14E| 12510_12| 11E 1 9 8E 4 3 3 4 5 1 6E 4 4 24E 4 15E| 12511_00| 6 1 4 10E 2 4 4 2 3 4 8E 4 6 28E 3 10E| 12511_12| 12 5 5 19E 2 4 4 3 4 2 8E 6 4 31E 3 15E| 12512_00| 9 6 3 17E 6 7 4 4 3 3 5E 3 6 24E 2 10E| 12512_12| 12 6 4 15E 3 3 2 3 2 2 6E 2 4 23E 5 10E| 12513_00| 3 5 2 14E 3 7 4 2 5 4 7E 3 7 26E 2 11E| 12513_12| 8 3 5 15E 3 3 6 2 2 5 6E 3 6 25E 3 15E| 12514_00| 3 4 6 21E 2 3 5 3 7 3 3E 4 6 39E 3 12E| 12514_12| 3 3 11 19E 3 5 2 2 2 2 7E 2 5 38E 2 14E| 12515_00| 4 3 5 15E 2 5 3 8 6 5 10E 4 8 42E 2 15E| 12515_12| 5 1 5 17E 2 2 2 2 3 3 8E 3 2 34E 3 14E| 12516_00| 4 2 3 21E 4 7 3 3 4 4 8E 4 5 46E 3 16E| 12516_12| 3 4 7 32E 3 3 5 3 12 4 5E 2 4 43E 4 21E| --------|----------------------------------------------------------------| --------|----------------------------------------------------|------------| date/PRN| 18 20 21 22 23 24 25 26 27 28 29 30 31 |RMS WRMS MED| --------|----------------------------------------------------|------------| 12510_00| 3 3 10E -- 9 10E 4 35 3 4 32 6 4 | 12 5 6| 12510_12| 4 3 5E -- 7 35E 4 6 6 5 30 4 3 | 11 8 5| 12511_00| 4 3 5E -- 8 18E 3 6 3 7 67 4 5 | 15 6 4| 12511_12| 3 5 6E -- 5 7E 1 7 3 6 35 2 5 | 11 5 5| 12512_00| 3 5 7E -- 7 6E 1 6 3 7 23 7 9 | 9 5 6| 12512_12| 3 4 9E -- 7 5E 3 3 2 6 25 3 4 | 8 5 4| 12513_00| 3 3 10E -- 10 5E 2 3 2 5 17 3 5 | 8 5 5| 12513_12| 5 3 16E -- 10 8E 3 2 5 6 7 3 5 | 8 5 5| 12514_00| 6 4 10E -- 10 10E 7 4 2 8 4 4 4 | 10 6 4| 12514_12| 3 5 6E -- 8 6E 4 4 6 4 4 2 3 | 9 5 4| 12515_00| 3 2 9E -- 14 7E 2 4 11 5 22 3 3 | 11 7 5| 12515_12| 4 3 4E -- 11 15E 3 6 3 5 >> 3 5 | 32 38 4| 12516_00| 3 3 10E -- 15 13E 3 9 8 4 >> 2 4 | 162 9 4| 12516_12| 6 2 31E -- 8 4E 2 5 7 4 -- 4 3 | 13 6 4| --------|----------------------------------------------------|------------| ****************************************************************************** * Gerd Gendt * * _/_/_/ _/_/_/_/_/_/ GeoForschungsZentrum * * _/ _/ _/ Department Geodesy and Remote Sensing * * _/ _/_/ _/_/ _/ Telegrafenberg A17 * * _/ _/ _/ _/ D-14473 Potsdam , GERMANY * * _/_/_/ _/ _/_/_/ Phone : ++49 331 288 1114 Fax :++49 331 288 1759 * * E-Mail: gendt at gfz-potsdam.de * * http://www.gfz-potsdam.de/pb1/igs/index_IGS.html * * IGS Analysis Coord.: AFTP://ftp.gfz-potsdam.de/pub/igsacc * * IGS GFZ AC : AFTP://ftp.gfz-potsdam.de/pub/igsprod * ******************************************************************************