****************************************************************************** dorismail 26-Nov-2010 13:36:22 Message No 0714 ****************************************************************************** Author: "Ferrage Pascale" Subject: ENVISAT orbit change / DORIS DATA delivery Dear colleagues, As it was annonced in the DORISMAIL 703, the ENVISAT orbit has changed thanks to 3 pairs of in-plane maneuvers (OCMs) performed between October 22 and November 2, 2010. During that period, the DORIS instrument was still operational, and the DORIS data are delivered with no interruption. Nevertheless, please note the following changes in the the cycle/ arc number and length of the delivered DORIS data : TRANSITION PHASE: (from 19/10/2010 to 27/10/2010) ----------------------- [Cycle 94 (7 days)] ARC 436 from 19/10 to 25/10 (7 days) no arc #437, #438, #439 [Cycle 95 (transition cycle)] ARC 440 from 25/10 to 27/10 (2 days) AFTER ORBIT CHANGE : (from 28/10/2010) -------------------------- [Cycle 96 (30 days)] ARC 441 from 28/10 to 03/11 (7 days) ARC 442 from 04/11 au 10/11 (7 days) ARC 443 from 11/11 au 17/11 (7 days) ARC 444 from 18/11 au 24/11 (7 days) ARC 445 from 25/11 au 26/11 (2 days) [Cycle 97 (30 days)] 4 7-day arcs + 1 2-day arc And so on... NB1: no data gap between arc 436 and arc 440 NB2: orbit maneuvers on 22/10/2010 (6:36 to 9:35) and 26/10/2010 (13:49 to 16:42) NB3: The choice of such pattern ( 4 consecutive arcs of 7 days, then, one arc of 2 days, and so on...) takes into account the new cycle duration of 30 days, existing processing capabilities, and the constraint of not overlapping. Best Regards, Pascale FERRAGE _____________________________________________________ CNES - International DORIS Service (IDS): http://ids-doris.org/ DCT/ME/OT- Bpi 612 Phone : 33 - (0)5 61 28 30 66 18, avenue Edouard Belin Fax : 33 - (0)5 61 28 25 95 31 401 TOULOUSE CEDEX 9 Email : Pascale.ferrage@cnes.fr _____________________________________________________ Cliquez sur l'url suivante https://www.mailcontrol.com/sr/wmlACP4KeyDTndxI!oX7UkccJfXxjPVWdRep1WflWCESxSCRdi!4ULmj5KHvHT3EfxoBRqvSue4jYo47nA1+0g== si ce message est indésirable (pourriel). Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr