[ The following text is in the "iso-8859-1" character set. ] [ Your display is set for the "US-ASCII" character set. ] [ Some characters may be displayed incorrectly. ] ****************************************************************************** DORISMail 18-Apr-2002 11:40:54 Message No 0184 ****************************************************************************** Author: Granier Jean-Pierre Subject: ENVISAT, SPOT5 news Doris onboard Envisat The Doris instrument on board the European satellite Envisat was switch on on March, 14th 2002.This allowed the first orbit determination of the satellite by the SSALTO ground segment on March, 19th. After some adjustment on various models used, the first validation results of the produced orbits are very encouraging: 1.A precision of about 5 cms on the radial component for the production in differed time (in 3 days) was obtained on April, 4th. 2.The navigator (orbit in real time) started its activities on April 12. Envisat CALVAL phase (6 months duration) will make possible to refine these results. More info: http://www.esa.int/envisat/ SPOT5, the third satellite fitted out with a second generation DORIS receiver, should be launched on 4th of May 2002. More info: http://spot5.cnes.fr [ Part 2: "Attached Text" ] Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr