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Article #121Re: nasa-celebrates-successful-mars-landing
From: Sylvia Else
Date: Tue, 07 Aug 2012 01:10
Date: Tue, 07 Aug 2012 01:10
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2546 bytes
On 7/08/2012 8:56 AM, Grant Edwards wrote: > On 2012-08-06, Don McKenzie <5V@2.5A> wrote: > >> Been there, done that :-) >> >> http://www.abc.net.au/news/2012-08-06/nasa-celebrates-successful-mars-landing/4180454 > > I thought the over-hyped commentary during the landing and especially > in pre-landing videos (like the "Seven Minutes of Terror") was > embarassing and made the design engineers and mission planners sound > incompetent. > > The commentators kept yammering on about how there was "zero margin > for error", and how "absolutely everything has to work right". > > Really? A design with _zero_ safety margin? Who signs off on a > system design or mission plan like that? > > I'm pretty sure that the "absolutely everything has to work right" is > also bullshit. I heard several people who seemd know know which way > was up talking about redundancy in the hardware design, the software > design, and in the mission planning itself. Even the animated video of the skycrane clearly shows the rockets in pairs, with only one of each pair in use. Sylvia.
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From: Sylvia Else <sylvia@not.here.invalid>
Newsgroups: sci.electronics.design,aus.electronics,comp.arch.embedded
Subject: Re: nasa-celebrates-successful-mars-landing
Date: Tue, 07 Aug 2012 11:10:20 +1000
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