RE: Launch window question

From: twcc--- via Seesat-l <>
Date: Thu, 28 May 2020 10:17:21 +0100
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 <> On Behalf
Of Marco Langbroek via Seesat-l
Sent: 28 May 2020 09:45
To: satelliet lijst (SeeSat) <>
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.

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Received on Thu May 28 2020 - 04:18:38 UTC

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