boundary="_000_25CDFAC1A563514A82FC2E7BD9609F2F91A65B59TWMBXP03cnesnet_" ****************************************************************************** dorismail 13-Sep-2016 10:18:03 Message No 1042 ****************************************************************************** Author: Ferrage Pascale Subject: TR: [Jason-2] : decision to move the satellite to the interleaved De : Guinle Thierry [mailto:Thierry.Guinle@cnes.fr] Envoy=E9 : mardi 13 septembre 2016 12:12 =C0 : ostst; Marsal Olivier; Livio.Mastroddi@eumetsat.int; Yuhas, Cheryl L.= (HQ-DK000); Vanessa Griffin Cc : Guinle Thierry Objet : [Jason-2] : decision to move the satellite to the interleaved orbit Dear OSTST Investigators, After approval by the Joint Steering Group held yesterday (12 Sept 2016), t= he OSTM/Jason-2 satellite will be moved to a new ground track early October= after the end of repeat cycle 303, after more than 8 years of service on t= he nominal ground track. The Jason-3 satellite will continue the long term = climate data record on the primary Topex, Jason-1, and OSTM/Jason-2 ground = track. The OSTM/Jason-2 satellite will be moved to the same interleaved orbit that= was used by Topex from 2002-2005 and Jason-1 from 2009-2012. Several maneu= vers will be performed beginning on October 2nd , 2016, with the interleave= d orbit achieved by October 14, 2016. Please note the following regarding the new OSTM/Jason-2 orbit. 1) OSTM/Jason-2 will use the same pass numbering scheme adopted by Topex an= d Jason-1 in the interleaved ground track. However, the start time of the O= STM/Jason-2 and Jason-3 repeat cycles will differ by approximately 5 days. 2) The first OSTM/Jason-2 repeat cycle on the new interleaved ground track = will be numbered repeat cycle 305. 3) The OSTM/Jason-2 altimeter will be placed in wait mode during the transi= tion to the new ground track. This may have some impact on the calibration = of the AMR, due to changes in the spacecraft thermal environment. Re-calibr= ation of AMR will be performed if necessary. 4) Data production (OGDR, IGDR and GDR) will be stopped during the transit = to the interleaved orbit. It will restart during cycle 305 with the same re= quirements for data latency and quality. This is the initial plan as approved by the Joint Steering group. Next mess= ages will confirm the start of activities and also when the satellite will = be back to nominal operations. T. Guinle on behalf the OSTM/Jason-2 project managers from CNES, JPL, NOAA = and EUMETSAT