****************************************************************************** DORISMail 15-Feb-2004 19:56:02 Message No 0301 ****************************************************************************** Author: Tavernier Gilles Subject: Change in DORIS measurements processing > Dear colleagues, > > A slightly improved tropospheric delay computation algorithm has been implemented in ZOOM processing. The modification is related to the determination of the geodetic local vertical. > > The impact of this modification on a Jason orbit determination is: > - about 4 mm on the radial component > - slightly improved DORIS and Laser residuals > - slightly improved cross-overs (mean and rms) > > DORIS measurements deliveries will be processed using the new algorithm starting with: > - arc 498 for SPOT 2 > - arc 251 for SPOT 4 > - arc 65 for SPOT 5 > - cycle 417 for TOPEX/POSEIDON > - cycle 73 for Jason > - arc 77 for ENVISAT > > As ENVISAT arc 76 is the first arc of cycle 22, it was reprocessed and measurements were delivered again to Data Centers. > > Best regards, > > Gilles TAVERNIER _____________________________________________________ CNES DSO/ED/AL/MA - Bpi 2002 Phone : 33 - (0)5 61 27 37 76 18, avenue Edouard Belin Fax : 33 - (0)5 61 28 25 95 31 401 TOULOUSE CEDEX 9 Email : Gilles.Tavernier@cnes.fr _____________________________________________________ Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr