Op 5-2-2016 om 9:47 schreef Jon . via Seesat-l: > Some days ago some rumours appeared about a possible new launch of DPRK. > Those rumours has been confirmed by NOTAMs and HIDROPACs. North Korea's original letter of Feb 2 to the IMO on which these Area Warnings are based is here: https://assets.documentcloud.org/documents/2702891/SN-1-Circ-332-INFORMATION-on-the-LAUNCH-of-an.pdf > Assuming a similar orbit than in previous launch and same Descending Node, > the launch window would start the 2016/02/07 _at_ 01:26:03 UTC. Every day the > rocket should be launched 28 seconds before than previous day for achieve > same Sun-Satellite RAAN. The 2012 launch was almost exactly 2 hours after Pyongyang sunrise. If that pattern repeats (pointing to a sun-synchronous orbit with daily overfly time around ~9h a.m. local time), launch will be around 00:24 to 00:41 UT rather than your 01:26 UT (00:24 UT if a similar solar elevation is aimed for; and 00:41 UT if they merely aim for 2 hours after Pyongyang sunrise). There is also some indication that the timing of the 2012 launch was (at least partially) dictated by a suitable window lacking overflights by western reconnaissance satellites. The launch window starts around local daybreak and ends just short of local noon, indicating a desire for an orbital plane resulting in morning passes. See also http://sattrackcam.blogspot.nl/2016/02/north-koreas-upcoming-satellite-launch.html - Marco ----- Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. e-mail: sattrackcam_at_langbroek.org Cospar 4353 (Leiden): 52.15412 N, 4.49081 E (WGS84), +0 m ASL Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL Station (b)log: http://sattrackcam.blogspot.com Twitter: _at_Marco_Langbroek ----- _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Fri Feb 05 2016 - 03:57:17 UTC
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