Timeline for What is the definition of a "spacecraft emergency" at the ISS, and what is the response to it?
Current License: CC BY-SA 4.0
19 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 2, 2021 at 21:57 | comment | added | uhoh | A spacecraft emergency is about 540 Scovilles (Scoville) | |
| Jul 31, 2021 at 21:57 | vote | accept | Organic Marble | ||
| Jul 31, 2021 at 1:14 | answer | added | 0xDBFB7 | timeline score: 3 | |
| Jul 30, 2021 at 13:56 | comment | added | David Hammen | I fixed that mistake, @OrganicMarble. | |
| Jul 30, 2021 at 13:55 | comment | added | Organic Marble | @DavidHammen it's actually FOD (lol) Flight Operations Directorate. Used to be MOD back in my day. | |
| Jul 30, 2021 at 13:53 | comment | added | David Hammen | What was JSC's Mission Operations Directorate is now the Flight Operations Directorate. | |
| Jul 30, 2021 at 13:40 | comment | added | Organic Marble | @DavidHammen the name of what? | |
| Jul 30, 2021 at 13:36 | comment | added | David Hammen | @OrganicMarble The name changed from Mission Control to Flight Control a few years ago. I don't know why, but it did. | |
| Jul 30, 2021 at 11:52 | comment | added | Organic Marble | @DavidHammen I would think so too, but Flight isn't usually referred to as a "controller'. | |
| Jul 30, 2021 at 11:39 | comment | added | David Hammen | @OrganicMarble Presumably the flight director. Flight ops is a hierarchical organization. | |
| Jul 30, 2021 at 11:28 | comment | added | Organic Marble | GdD "the" flight controller? Which one? | |
| Jul 30, 2021 at 10:58 | comment | added | David Hammen | @GordonD Those inadvertent firings on Gemini 8 were a huge lesson-learned in how not to design thrusters. I worked on a much later vehicle on detecting and correcting for thruster failures. I asked whether I needed to worry about thrusters failing on. I was told thrusters don't fail on. A few weeks later, the avionics team said they had found some circumstances where thrusters could fail on. This was not a happy moment for the avionics team. It was easy to find the project lead: Listen for where all the shouting was coming from. There was a lot of shouting in that meeting. | |
| Jul 30, 2021 at 8:22 | comment | added | GordonD | Thrusters firing uncommanded go all the way back to Gemini VIII. The crew only got back alive because of the skill of the Command Pilot, who three years later walked on the Moon. | |
| Jul 30, 2021 at 7:11 | comment | added | GdD | I would imagine if the flight controller says it's an emergency then it's declared one. | |
| Jul 30, 2021 at 6:00 | history | tweeted | twitter.com/StackSpaceExp/status/1420987539645767681 | ||
| Jul 30, 2021 at 4:18 | comment | added | David Hammen | I'm not ops, but I would call a thruster fail on that causes a 45 minute loss of attitude control an emergency. Thrusters are not supposed to turn on "inadvertently". And for 45 minutes? Wow. | |
| Jul 30, 2021 at 4:04 | comment | added | Organic Marble | @DavidHammen No, I don't know the answer in today's world. It was a pretty incredible scenario including a 45 minute LOAC. There hasn't been one of those in a long time. The design people swore up and down shuttle jets couldn't fail on. MLM appears to be different. | |
| Jul 30, 2021 at 3:30 | comment | added | David Hammen | I'm assuming this is an ask-to-answer type of question. I await your answer. I work on the design side rather than the ops side of things, so I can't provide a good answer. We generally design thrusters to fail off: Multiple valves in series, software and firmware that are carefully scrutinized. A failed on thruster ranks right up there in the hierarchy of bad things we do not want to ever happen in space. | |
| Jul 30, 2021 at 1:37 | history | asked | Organic Marble | CC BY-SA 4.0 |