Re: STS-131 Entry View Opportunities Over US April 19 morning local time

From: Gavin Eadie (gavin@umich.edu)
Date: Tue Apr 20 2010 - 16:08:04 UTC

  • Next message: Erkenswick, Tom M. (JSC-DM351): "RE: STS-131 Entry View Opportunities Over US April 19 morning local time"

    Maybe not the reason, but it certainly offered the opportunity for a detailed test objective (DTO) related to exploring when the hypersonic air flow on the underside of Discovery would go turbulent in the presence of a small experimental bump in the normally smooth tiles.  Photography from the ground revealed the break to a turbulent flow at about Mach 18 -- that photography would have been a lot harder over the ocean!  What I don't know is whether the DTO was added because of they were landing on a descending path anyway, or they selected the cross-US landing track in order to perform the DTO.
    
    On Apr 20, 2010, at 9:21 AM, Patrick Schmeer wrote:
    
    > STS-131 landed 13 minutes ago.
    > 
    > Why had such a landing track across the USA been chosen?
    
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