Hello; An Atlas V 401 is scheduled to launch the GPS IIF-10 satellite the 2015/07/15 at 15:36 UTC. http://www.ulalaunch.com/webcast.aspx http://www.ulalaunch.com/uploads/docs/Mission_Booklets/AV/av_gpsiif10_mob.pdf The flight azimuth will be north-east at about 45.8 degrees. Shortly after launch the vehicle will start the pitch-roll maneuvers for take direction of northerm UK (sadly its day at this moment in Europe). The Main Engine Cut-Off 1 will be at T+1022.2 seconds, at 15:53:02.2 UTC, when the rocket is on MTO transfer orbit. This is MTO transfer orbit estimation, that would be valid at MECO-1 till MES-2 (Main Engine Start-2), 3 hours and 17 minutes after launch: GPS IIF-10 #0 222 X 20356 km 1 71000U 15600A 15196.65695602 0.00000000 00000-0 00000+0 0 03 2 71000 54.9954 66.0379 6039771 92.2703 348.9227 4.03447725 04 Once done this maneuver, of about 2000 m/s since the rocket enters orbit, it will pass over UK, eastern Europe and western Asia, Arabia, and finally the pacific ocean in ballistic trajectory till reach the southerm australian sea (see the mission ground-track on the press kit), when a final burn will be made for circularize the orbit and deploy the GPS satellite near the operational slot. This TLE should start working at T+03:23:14.6 after launch, at 20:59:14.6 UTC. I've put the epoch just at this time: GPS IIF-10 #1 20463 X 20479 km 1 71001U 15601A 15196.79113426 0.00000000 00000-0 00000+0 0 08 2 71001 55.0078 67.9128 0002904 242.8547 30.0007 1.97330111 02 Once the satellite is deployed the USPACECOM will need about half day or so to publish the first official TLE, so my guess is to mantain this #1 orbit since 20:59:14 UTC till the USPACECOM publishes its first orbit. Once published my guess is to replace my TLE. Note: At ~20:42 UTC till ~20:43:30 UTC the MES-2 (Main Engine Start-2) will be made, that will be easily visible in sourthem Australia. Also, after spacecraft separation the Centaur upper stage may make its tipical fuel-venting and (maybe????) CCAVM (Collision and Contamination Avoidance Maneuver), making a nice comet-form bright cloud on the sky, usually confused as an UFO. I can't see the NOTAM for Centaur de-orbit so I doubt the Centaur will be de-orbited after SC separation. --------- Some hours later, an Ariane 5 ECA rocket is scheduled to launch the Star One C4 & MSG-4 satellites the 2015/07/15 at 21:42 UTC to GTO orbit. Target is 249 x 35904 Km, 4 degree inclination orbit. http://www.arianespace.tv/ Press kit: http://www.arianespace.com/images/launch-kits/launch-kit-pdf-eng/VA224-launchkit-GB.pdf Here is the orbit estimation for Ariane 5 ECA/Star One C4&MSG-4 satellites: Ariane 5 ECA #0 13.0 2.5 0.0 3.0 d 17 231 X 35494 km 1 70000U 15500A 15196.91042824 0.00000000 00000-0 00000+0 0 02 2 70000 4.0007 88.0982 7273455 175.8108 354.3572 2.30104411 03 The numbers at half of line zero is a very rough brightnest curve estimation in mcnames format. This data will be uploaded to satflare.com and calsky.com, I will post links later or tomorrow. Be good!! P.S: As allways those TLEs are valid only if launch occurs at planned time, at launch window open. Probably I will not be available to update them if a delay occurs. Jon. -- Jon, COSPAR 6242, 42.9453, -2.82839, 623m, Bitoriano, Basque Country. _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Tue Jul 14 2015 - 05:16:40 UTC
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