I had an initial question rattling in my head of how come the next attempt is not a multiple of approx 90-mins based on the ISS orbit time as simplistically the Dragon is on catch-up, Then I realised the precession around the globe means they have to coordinate launch with ISS position, say, 24 hours later. I guess there are also local (Florida) issues with day/night launch times plus maybe NASA want the meet up to be over a specific part of the globe. Does anyone know the proper answer? Tim Collins UK (for the foreseeable future) -----Original Message----- From: Seesat-l <seesat-l-bounces+twcc=btinternet.com_at_satobs.org> On Behalf Of Marco Langbroek via Seesat-l Sent: 28 May 2020 09:45 To: satelliet lijst (SeeSat) <SeeSat-L_at_satobs.org> Subject: Launch window question 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 _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Thu May 28 2020 - 04:18:38 UTC
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