Dawn Framing Camera Q&A, Ask your questions to the Framing Camera Operations Team |
Dawn Framing Camera Q&A, Ask your questions to the Framing Camera Operations Team |
Jun 29 2011, 09:02 PM
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Junior Member Group: Members Posts: 50 Joined: 27-June 11 From: Katlenburg-Lindau, Lower Saxony, Germany Member No.: 6038 |
Dear all,
We are amazed, and a bit flattered, by the interest that the Dawn mission has awaken throughout the internet and particularly in this forum, and we would like to thank you for it. Space imagery is frequently subject of discussion and even re-work in these pages, but the field of space operations does not seem to be covered very often. That is why we have decided to offer you all the posibility to ask your questions to the team, that we will gladly reply within the limitations provided by our working agreements with JPL/NASA and the Dawn Science Team. We would like to request in advance your understanding if we do not reply promptly (or not at all) to some of your questions. We are in a busy and exciting time, and we intend to share this excitement with you as much as we can. Thank you all for making a great site out of UMSF and for your participation in this topic. Regards, Pablo Gutiérrez-Marqués Framing Camera Operations Manager -------------------- |
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Jul 1 2011, 05:29 PM
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Director of Galilean Photography Group: Members Posts: 896 Joined: 15-July 04 From: Austin, TX Member No.: 93 |
Have you guys solved any interesting problems?
As an engineer myself, I like hearing about "war stories" from others. Once recent one for me was customers returning boards because they couldn't program the flash and it turned out that we had purchased these NAND flashes from brokers (kinda grey-market-ish), and when we scanned them, we found text strings like "Discovery Channel, Disney, etc". Apparently they were originally programmed for a set-top box and were remaindered, and our manufacturing program didn't erase them, because the spec for the NAND said they would come erased. Whoops! Then there's the story about the chip that wouldn't boot properly the second time you powered it on, because a certain power rail decayed so slowly that 3 seconds after power off, it was still a couple of hundred millivolts, and when the processor turned on, it corrupted the internal state enough to cause a crash. That one was a real head-scratcher for me, first time I'd seen a problem caused by a power supply not powering down fast enough! -------------------- Space Enthusiast Richard Hendricks
-- "The engineers, as usual, made a tremendous fuss. Again as usual, they did the job in half the time they had dismissed as being absolutely impossible." --Rescue Party, Arthur C Clarke Mother Nature is the final inspector of all quality. |
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Jul 2 2011, 09:43 PM
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Junior Member Group: Members Posts: 50 Joined: 27-June 11 From: Katlenburg-Lindau, Lower Saxony, Germany Member No.: 6038 |
Have you guys solved any interesting problems? It is a general rule of politeness, that one should not talk about the war while it is still going on, but since Marc Rayman, the mission engineer, already talked about it in the mission blog, I would like to call your attention about the intelligent solution that the mission team envisioned to save the propellent hydrazine. Regards, Pablo -------------------- |
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