Marco, As a guess, and I haven't run the numbers, there is a window of ISS position around the orbit (with respect to the Cape, at the launch time) that can be accessed within the period after launch allowed for in the mission timeline, which seems to be around 20hrs. The ISS is within that window on the 27th, 30th and 31st, but not the 28th or 29th. The instantaneous launch window is obviously set by the ISS orbital plane and changes by a fixed period for each day. regards Richard On 28/05/2020 08:45, Marco Langbroek via Seesat-l wrote: > > Question to the hive mind... > > Does anybody know why there is a 3-day gap between yesterday and the next launch > opportunity for Crew Dragon, instead of 1 day? > > What considerations are in play there? Also because the other backup date is one > day after May 30, not 3 days. So why the 3 days between first and second > attempt, and then just 1 day between second and third attempt? > > - Marco > > ----- > Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. > e-mail: sattrackcam_at_langbroek.org > > Station (b)log: http://sattrackcam.blogspot.com > Twitter: _at_Marco_Langbroek > ----- > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > -- mob: 0771 858 8940 _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Thu May 28 2020 - 04:56:49 UTC
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