https://www.space.com/spacex-demo-2-astronaut-launch-delay-explained.html Its hard find accurate information... or thrusted On Thu, May 28, 2020 at 3:39 PM pmafer <pmafer_at_gmail.com> wrote: > During yesterday broadcast from NASATV, one commentator refers exactly > about subject. > > I don't recall exact time on video but your can search it on > https://www.youtube.com/watch?v=rjb9FdVdX5I after launch scrub. > > I remember that its more than one factor. Orbital mecs, of course, > weather, ISS work schedule, etc. > > cheers > Paulo > > On Thu, May 28, 2020 at 11:34 AM Marco Langbroek via Seesat-l < > seesat-l_at_satobs.org> wrote: > >> Op 28-5-2020 om 11:56 schreef Richard Cole: >> > 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. >> >> >> I think Richard is on the right track >> >> Upon further analysis: >> >> The choosen launch dates, assuming a similar 19-hour time-window between >> launch >> and docking, all result in docking while on the nightside of earth. While >> the >> two dates inbetween result in docking on the dayside of the earth. >> >> So illumination concerns seem to guide the choice here. Daytime might be >> avoided >> so as not to be blinded by the sun, perhaps. >> >> - Marco >> >> >> PS: my question was sparked because it popped up in a Zoom launchparty >> with a >> bunch of Dutch science writers and space people which I participated in >> yesterday. Nobody had a clear answer right away, but I think we have an >> answer >> now! Thanks to the hive mind! >> >> >> ----- >> 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 - 09:58:39 UTC
This archive was generated by hypermail 2.3.0 : Thu May 28 2020 - 14:58:39 UTC