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SpaceX Jason-3 Live Webcast
- nerdy 11y agoLiftoff still 15-20 minutes out.
- deleted 11y ago[deleted]
- zackboe 11y agoYouTube link: https://www.youtube.com/watch?v=ivdKRJzl6y0 https://www.youtube.com/watch?v=ivdKRJzl6y0
- deleted 11y ago[deleted]
- nerdy 11y agoThere are two YouTube links, from the SpaceX page: SpaceX webcast will go live here and on YouTube at about 1:15pm ET/10:15am PT. For our full hosted webcast, use this link https://www.youtube.com/watch?v=ivdKRJzl6y0 https://www.youtube.com/watch?v=ivdKRJzl6y0 For views of rocket, launch countdown audio and telemetry info, use this link: https://www.youtube.com/watch?v=vkz_lclGXNg https://www.youtube.com/watch?v=vkz_lclGXNg
- harshreality 11y agoThe spacex.com video page uses livestream which seems to require flash for desktop browsers. Easiest fix would probably be to embed the youtube video instead.
- deleted 11y ago[deleted]
- vanattab 11y agovideo locked up right before landing....
- 51Cards 11y agoI'm thinking there may have been a video delay and it locked up because the landing might not have gone well. i.e. Taken out the video hardware. Just a guess... hoping to be wrong.
- deleted 11y ago[deleted]
- sixQuarks 11y agoI don't know, I think we would have seen something if it knocked out the video. A flash of light, or spark, or something.
- DougWebb 11y agoIf it was just the video that got taken out, they'd still have telemetry and they'd know what happened. They must have lost the satellite uplink, either by losing the equipment on the ship or by knocking the ship out of position so the antenna isn't aimed correctly.
- grecy 11y agoThere was an orange flash on the deck just a second or two before the video cut out...
- ufmace 11y agoMy more conspiracy-minded thoughts have wondered about this. Yeah, it's probably a satellite connection and they can be flaky, especially at sea, but isn't it awfully convenient that the feed cut off mere moments before a bad landing? SpaceX PR is quite good indeed...
- mikeash 11y agoThey've put out videos of past landing failures. No reason to think they'd be shy about this one.
- grecy 11y agoEdit: Not sure now
- jcurbo 11y agoOf course Murphy's Law is in full effect, as the video on the drone ship cuts out right before the first stage lands. On another note, I really like the orbital animation they're using, it reminds me of Kerbal Space Program. The ballistic arc turning into an orbit is a really good visualization for laypeople, I think.
- vanattab 11y agoThey are saying over at r/spacex that it crashed on landing
- grecy 11y agoIt said that for a brief moment, now it says "No word on landing yet"
- vanattab 11y agoI love this comment from over at r/spaceX "Schrodinger's rocket: simultaneously landed and not landed at the same time." - retiringonmars Edit: someone opened the box...it crashed Edit2: What's up with the downvotes? Are you not supposed to re-post a quote?
- nerdy 11y agoIt'll be back on in ~40 mins after coast phase for spacecraft separation.
- arbabu 11y agoDid you mean the landing will happen after ~40 mins?
- harshreality 11y agoNo, boostback and (attempted) landing was ~10 mins. GP is in reference to the polar orbit insertion burn for the stage that's in orbit.
- deleted 11y ago[deleted]
- grecy 11y agoFrom webcast just now: - Landing was on target - hard landing - landing leg broke - not standing upright. footage later (in a few hours)
- atroyn 11y agoI wonder if it exploded this time, last time they didn't stay upright the remaining fuel ignited and it blew up.
- agumonkey 11y agoGood point, no fuel no boom.
- greglindahl 11y agoWith some left-over LOX and kerosene, of course it blew up. Rockets don't stay in one piece after they fall over.
- atroyn 11y agoI wonder how much of both there was left though. If they can salvage the engine it still might be a success. It would also depend on when the leg broke - do they vent any unspent LOX/Kerosene after they land?
- JshWright 11y agoYou could vent the LOX. "Venting" the kerosene would just mean dumping it all over the deck. That doesn't seem like an awesome option... My guess is there was 'plenty' of propellant left (to use a technical term for quantity...). The rocket could have flown back to the launch site, but they weren't able to get environmental clearance. While they may have adjusted the trajectory to take advantage of the downrange landing (letting the first stage burn longer), they wouldn't have had any reason to skimp on the propellant left over for landing, so I'm sure there was a healthy margin left in the tanks. More than enough for an impressive fireball.
- 11y ago
- castratikron 11y agoA leg broke while it was landing on the barge. https://twitter.com/SpaceX/status/688799901463883776 https://twitter.com/SpaceX/status/688799901463883776
- heraclez 11y agoWhat does it mean that a leg broke? Correct me if I'm wrong cause I'm no expert, but I'd assume that there'd be some 'emergency' backup legs to address this kind of event? What does "not upright" mean? Did it crash? Or is it simply in limbo, leaning, at an x degree angle?
- atroyn 11y agoEvery extra part is extra weight, needing extra fuel, which in turn needs extra-extra-fuel because of the weight of that new fuel, and so on. There is very little redundancy on a rocket. It's unknown what exactly 'not upright' means just yet.
- heraclez 11y agoFair enough, how about some robotic arms on the drone ship ?
- atroyn 11y agoNow you have two problems. But I wonder if something much simpler, like a net, wouldn't make more sense. As soon as the rocket touches down, the net extents and wraps the rocket, keeping it upright.
- heraclez 11y agoWhat would be the two problems? How would you envision the net though? A net does sound simpler but I have a hard time picturing it
- atroyn 11y agoRobot arms are a complex control problem all on their own. To catch the rocket they'd have to be very fast, and very precise. At the same time, the rocket's control loops already have only a very small margin for error. A small miss by either system and you have a much higher chance of failure. In terms of a net, I imagine something that's lying on the deck under tension between four bendy rods. When the rocket is close enough, the rods snap over to the other side, furling the rocket in the net and holding it more or less steady.
- jacquesm 11y agoDoes anybody know why they would re-try the barge thing when they've already got a once-proven way of landing on a pad? What is the benefit of being able to land on a barge? (which to me seems to be a lot harder than landing on land, after all, now you have two craft to coordinate, one of which is only nominally under your control (lat, long, the rest is very much subject to change due to the action of the ocean).
- justin66 11y agoFuel. Edit: to elaborate, you can burn more fuel on the first stage, with all the advantages that implies, if you have a place to land down range as opposed to having to turn around and fly back. Sometimes the way to get that place to land might be to put it there.
- colechristensen 11y agoDepending on the target orbit, it is often simply not possible to propel the first stage back to dry land. Today's Vandenberg launch into polar orbit was just that.
- wolf550e 11y agoThey said during prelaunch news conference that for this mission, falcon 9 had plenty of oomph to get the first stage back to the pad (payload mass is low), but couldn't because of environmental assessment not being ready.
- sly_foxx 11y agoWhat is the point of this company? What benefits do I get from government spending my cash on the company? None. If I want Mars experience, then I'll go to some shitty place in Nevada, which is much cheaper + human body is accustomed to Earth. I really don't get the fascination with SpaceX.
- Gravityloss 11y agoEarth is the cradle of humanity, but mankind can't stay in the cradle forever.
- sly_foxx 11y agoHaven't you got the memo? You are going to die, everyone you know is going to die and when the Sun explodes, Mars is not going to be spared either. This universe will end most likely in a heat death where life and computation will not be possible. Everything that is being done is ultimately pointless.
- brianwawok 11y agoYou must be fun at parties.
- ricardobeat 11y agoThen what's the point of complaining about it?
- Liuser 11y ago"A society grows great when old men plant trees whose shade they know they shall never sit in."
- heraclez 11y agoThis is u: https://s-media-cache-ak0.pinimg.com/236x/c6/22/62/c6226219cf75186c90c7e025c42e1eef.jpg https://s-media-cache-ak0.pinimg.com/236x/c6/22/62/c6226219c...
- lutorm 11y agoIn case someone comes back: Video of landing and leg failure: https://www.instagram.com/p/BAqirNbwEc0/ https://www.instagram.com/p/BAqirNbwEc0/