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SpaceX Crew Demo-1 Mission [video]
- mch82 8y agoLaunch window opens at 2:49 a.m. EST, or 7:49 UTC.
- JshWright 8y agoIt also closes at 2:49 a.m. EST (Falcon 9 launches to the ISS have instantaneous launch windows).
- antimora 8y agohttps://www.youtube.com/watch?v=u-SAdjoFVHk https://www.youtube.com/watch?v=u-SAdjoFVHk
- headmelted 8y agoThanks for posting this. I always watch the launches with my kids and I'd totally forgotten it was this morning.
- ramidarigaz 8y agoThe NASA TV feed seems to be higher quality than youtube (and has identical content). https://www.nasa.gov/multimedia/nasatv/index.html#public https://www.nasa.gov/multimedia/nasatv/index.html#public
- edvinasbartkus 8y agobut it is more delayed :)
- MertsA 8y agoThe NASA feed appears to be delayed by ~45 seconds from the YouTube feed.
- azernik 8y agoHad same quality issues - then just told YouTube to use 720p instead of auto-resolution and it got all better.
- mhsabbagh 8y agoAh, here I am, setting under the blanket and drinking a cup of tea with lemon, watching a rocket 9600km away from me that's about to go to space in few minutes. What a time to be alive.
- cheese_toasty 8y agoPretty great friday night!
- mhsabbagh 8y agoIt's Saturday 11AM here, though.
- timmyla 8y agopretty great Saturday morning!
- function_seven 8y agoPretty great Saturday morning!
- lostlogin 8y agoSaturday night here. What time zones do rockets use?
- saagarjha 8y agoProbably the one that mission control is using.
- occamschainsaw 8y agoUTC is the time zone of space missions usually.
- cheese_toasty 8y agoMan this makes me miss when I was living at UCF - we'd see shuttles taking off at Kennedy space center from East Orlando
- hoorayimhelping 8y agoI grew up in southwest Orlando. We'd go outside during elementary school to watch the launches, we'd interrupt little league games and football games to watch the launches. Kids and parents all just found it so magical and amazing. Those solid rockets were clearly visible even 70 miles away.
- goshx 8y agoI am 180+ miles South from the pad and it is visible from here! I love watching them.
- 14 8y agoThis is so exciting! I had not heard this was happening and came to my favorite site to check out some bed time reading and find this! Awesome
- hsrada 8y ago"Science is the only news." (https://www.goodreads.com/quotes/213539-science-is-the-only-news-when-you-scan-a-news https://www.goodreads.com/quotes/213539-science-is-the-only-...)
- jpatokal 8y agoLooks like they nailed the launch: first stage recovered and Dragon 2 separated successfully. Congratulations SpaceX! Docking with the ISS is scheduled ~27 hours from now on Sunday, March 3 at 10:55 UTC (5:55 EST). https://www.space.com/how-to-watch-spacex-crew-dragon-demo-1-mission.html https://www.space.com/how-to-watch-spacex-crew-dragon-demo-1...
- labster 8y agoAw man, and I really wanted to binge watch this series. Well, at least this show moves faster than Orion.
- jessriedel 8y agoAnyone know why they choose a launch time and trajectory such that the arrival at ISS is more than a day later? It seems like you could choose to arrive at the ISS almost immediately after reaching orbital velocity if you wanted.
- sitharus 8y agoSo they have time to validate the systems are working correctly. A direct launch would leave little margin for error, especially on a test flight. Edit: now I think more it also allows for variations in launch performance. Soyuz does a three day rendezvous as back when the system was designed the accuracy required wasn’t possible, though now they’ve planned a same-day docking.
- JshWright 8y agoSoyuz has done "fast track" (same day) approaches for years now.
- azernik 8y agotl;dr because the ISS orbit is not equatorial, choosing the right launch time is non-trivial and solutions are only approximate. ISS launch windows are complicated - you have to match both plane (i.e. the Earth needs to turn so that the Cape/Baikonur is under the ISS's orbit path) and phase (i.e. at the time the plane match happens, the station needs to be at the right part of its orbit for the spacecraft to meet the ISS right after launch). A launch site crosses the plane of the ISS orbit twice a day, but the phase angle at those crossings is often quite far off of optimal - you want the ISS to be a bit behind at launch so that by the time your spacecraft gets up to the right altitude/speed it's matched up. So you have to find the minimum phase angle at launch window for a targeted several weeks or so, then have the ISS make slight orbit changes to bring the phase angle closer to optimal. Once you're up and have as low of a phase-angle difference as possibly, you then have to spend a bunch of 90-ish-minute orbits getting your position in orbit matched up to the ISS. At fastest, you can get down to the single-digit-hours range, but that takes a good selection of launch window, a bit of a burn in advance from the ISS to tweak its phasing, tracking systems that don't waste an orbit determining where exactly you are, and no scrubs. This article is a good example of the process (but not the physics/geometry): https://www.nasaspaceflight.com/2018/07/progress-ms-09-super-fast-4-hour-rendezvous/ https://www.nasaspaceflight.com/2018/07/progress-ms-09-super... > The long sought attempt at launching a Russian Progress resupply vehicle to the International Space Station and having it rendezvous with the orbital complex after just two and a half orbits and just under 4 hours in space is being attempted. ... > As with the other fast track rendezvous attempts, the reboost and phasing alignment of the Space Station with the Baikonur Cosmodrome is only available for this launch day. A scrub to today’s instantaneous launch of Progress MS-09 would have resulted in the craft having to fly a two-day, 36 orbit phasing profile to the ISS on a realigned launch date later this week.
- deleted 8y ago[deleted]
- function_seven 8y agoGoosebumps when stage 1 stuck that landing. Godspeed, Ripley!
- zedgerman 8y agoSame here. Watching rockets land from orbit will maybe never get old. Awesome job to everyone at SpaceX! Godspeed for the rest of the mission!
- sidcool 8y agoEverything went well so far. Lift off, stage separation, first stage Landing, Dragon separation. They have honed these steps over the past several years. The ISS rendezvous is going to be just as successful. Great going SpaceX/NASA.
- slim 8y agotl;dr no crew onboard (still a great achievement)
- amayne 8y agoI’m at Kennedy Space Center on the causeway across from the launch pad. Just watched it from approximately 5 miles away. Insane.
- smdyc1 8y agoAmazing footage. The precision Landing of stage 1 was something I hasn't expected.
- JshWright 8y agoThis was actually one of the less precise landings. Generally it's right on the X. It looks like it may have slid a bit after touchdown.
- primordialsoup 8y agoI am an engineer who builds with a computer. And when I see such things as this, I sometimes spend a minute or so marveling and thinking about the complexity of building and orchestrating such a launch. In fact, I really cannot comprehend how something like this can be successfully done, given how so many things could go wrong. Yes, I understand the idea of redundancy, I understand gravity, I understand that physics and chemistry goes into this, but still, the engineer in me wonders how on earth can we make all of this work together. Really, kudos to spaceX, kudos to NASA, and and kudos to those who believe in science.
- mandeepj 8y agoTo help you with not feeling overwhelmed - they are doing it since May 6, 2002. It has taken a lot of time, of a lot of people to get here. There was a lot of failures also, along the way.
- bsaul 8y agoI remember reading here a document about C programming guidelines for military / space software ( basically no dynamic memory allocation ever), but that was set a long time ago. I wonder if spaceX reinvented some parts of the software stack, or if they went along the traditional way. I don’t expect seing rust code in the shuttle, but maybe formal proof with custom functionnal languages...
- danpalmer 8y agoFrom what I understand, they are pushing the boundaries on the hardware front, i.e. relatively recent, typical Linux computers onboard, and just relying on having a few redundant ones and short flight times, rather than very radiation hardened systems like those used in satellites or real-time operating systems. However on the SpaceX software side I think they’re fairly conservative and “boring”, so I’d guess C and similar guidelines to what you’ve mentioned.
- biesnecker 8y ago
- rasikjain 8y agoKudos to the entire team of SpaceX, Nasa and Ripley (dummy) for this mission. This takes a great amount of co-ordination and integration to make this complex mission successful. Living in great era of innovation and advancement in space.
- WestCoastJustin 8y agoPost Launch Interview w/ Elon Musk & NASA Team Discuss SpaceX Dragon 2 Launch Success @ https://www.youtube.com/watch?v=HuXPLtJXd14 https://www.youtube.com/watch?v=HuXPLtJXd14
- Symmetry 8y agoFrom Eric Berger's twitter[1] >If the first stage lands tonight, SpaceX will have successfully landed 35 of its 69 launches, meaning that MORE THAN HALF of its rocket launches will have safely returned. [1]https://twitter.com/SciGuySpace/status/1101752352317628416 https://twitter.com/SciGuySpace/status/1101752352317628416
- aboutruby 8y agoSame thing happened to NASA, started at 43.6% success rate for 1950s then 85.1% for 1960s, etc. etc. https://space.stackexchange.com/questions/1659/what-is-the-success-rate-of-nasa-launches https://space.stackexchange.com/questions/1659/what-is-the-s...
- 420codebro 8y agoRemember the SpaceX statistic is counting number of returned, versus the NASA one is number of successes getting into orbit. I know I'm glossing over the fact that SpaceX benefits from the work NASA did for the past 60+ years, but just wanted to point that out (as it speaks kudos to SpaceX for mastering such a brand-new thing so quickly, on a budget).
- GhostVII 8y agoImportant to note that for many of their launches they weren't trying to land. They had 42 landing attempts, so over 80% success rate.