What mission was this? |
What mission was this? |
Oct 24 2018, 06:59 PM
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#1
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Junior Member Group: Members Posts: 83 Joined: 19-April 05 Member No.: 251 |
When I was a teenager (45 - 50 years ago), there was a mission launched where the main parabolic high gain antenna did not open fully. What was this mission and how did they solve the antenna problem?
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Oct 27 2018, 07:52 PM
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#2
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Senior Member Group: Members Posts: 1582 Joined: 14-October 05 From: Vermont Member No.: 530 |
That tape recorder was a nightmare, too. The whole "stuck head" thing was just miserable to read about in the status reports. But at least they had lots of power to "condition" things.
I work in solid state memory development, and from afar, the reverse engineering they have to do on the Flash memories these days seems just about as painful. I'd love to hear what actually makes these things debuggable. From what I can tell, all the hopes about being "rad hard" devolve into "what now?" after a few years, so perhaps simple architectures are what's really needed. |
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Oct 27 2018, 11:26 PM
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#3
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
I'd love to hear what actually makes [space flash memory] debuggable. Paywalled, but this is the most technical description I could find. https://ieeexplore.ieee.org/document/7119257 Near as I can tell, most of these flash issues have been more about software and less about hardware. For the internal flash in our instruments on MSL, I intentionally used the simplest possible flash management code, all written in-house, instead of a more featureful but more complex file system. So far, so good. Our application, by design, is not very stressing. For example, erasing is pretty rare. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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