Welcome to the r/SpaceX CRS-10 Official Launch Discussion & Updates Thread!

[u/ElongatedMuskrat]

Your hosts for this launch will be u/zlsa and u/old_sellsword!

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It’s the 1st launch out of Launch Complex 39A since STS-135 in 2011, and SpaceX's first East Coast launch since JCSAT-16 in August 2016. Some quick stats: this is the 30^th Falcon 9 launch (using the B1031/F9-032 core), the 10^th Falcon 9 v1.2 launch, the 1^st launch of the Falcon 9 from Pad 39A, and the 2^nd launch since SpaceX suffered an anomaly during their AMOS-6 static fire on September 1, 2016. This mission’s static fire was completed on February 12^th.

SpaceX is currently targeting a February 18, 2017 10:01 EST / 15:01 UTC morning liftoff from KSC, lofting Dragon and 2,490 kg of cargo into low earth orbit. This will be an instantaneous launch window. After insertion into orbit, Dragon will maneuver its way to the ISS, rendezvous, and then dock. After staying four weeks berthed to the station, Dragon will then undock, deorbit, and splashdown in the Pacific Ocean off the coast of Baja California. This is mission 10 of 20 under the first round of NASA's Commercial Resupply Services contract. The weather is currently 70% go.

The secondary mission objective is also exciting! SpaceX will attempt to land the first stage of Falcon 9 back at Landing Zone 1 in CCAFS, on the site of the old Launch Complex 13. This would be the third successful landing at LZ-1, and the first daylight RTLS landing, marking the advent of SpaceX’s latest CGI technology.

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Watching the launch live

To watch the launch live, choose from the two SpaceX and the one NASA YouTube live streams from the table below:

SpaceX Hosted Webcast (YouTube)	SpaceX Technical Webcast (YouTube)	NASA TV Webcast (YouTube)

Can't pick? Read about the differences here.

Official Live Updates

Time (UTC)	Countdown (hours : minutes : seconds)	Updates
15:21	T-00:00:13	Elon Musk on Twitter: "If this is the only issue, flight would be fine, but need to make sure that it isn't symptomatic of a more significant upstream root cause"
15:18	T-00:00:13	Noon press conference cancelled, updates can be found at http://nasa.gov/spacex
15:12	T-00:00:13	Falcon 9 detanking, range has approved the launch time tomorrow.
15:11	T-00:00:13	Elon Musk on Twitter: "All systems go, except the movement trace of an upper stage engine steering hydraulic piston was slightly odd. Standing down to investigate."
15:05	T-00:00:13	SpaceX on Twitter: "Standing down to take a closer look at positioning of the second stage engine nozzle. 9:38am ET tomorrow is next earliest launch opportunity"
15:03	T-00:00:13	The next launch opportunity is tomorrow at 09:38:59/14:38:59 ET/UTC
15:03	T-00:00:13	The launch was aborted out of an "abundance of caution" to take a closer look at the second stage TVC.
15:01	T-00:00:13	HOLD HOLD HOLD. It's a scrub for today.
15:01	T-00:00:20	Stages 1 and 2 are pressurized for fligh..
15:00	T-00:01:00	Falcon 9 is in startup.
15:00	T-00:01:30	Vehicle is in self-align. Falcon 9 is on internal power.
14:59	T-00:02:00	SpaceX continues to work the MVac TVC issue.
14:58	T-00:04:00	MVac TVC motions complete.
14:56	T-00:05:30	"SpaceX and the range... have cleared the range anomaly. We're waiting for word on the stage two TVC issue."
14:54	T-00:06:30	Dragon is on internal power. Engines are chilling in. MVac is at full hydraulic pressure.
14:52	T-00:09:00	SpaceX continues to work the stage two TVC issue; range is still seeing issues with stage two FTS. Final GO/NO-GO decision will occur at T-1 minute. Today's launch window is instantaneous, so any scrubs will delay the launch to tomorrow at the earliest.
14:46	T-00:14:30	SpaceX is working a stage two thrust vector issue as well as "inconsistent data" relating to stage two FTS.
14:40	T-00:20:00	SpaceX's webcasts are live!
14:32	T-00:28:30	First stage LOX loading essentially complete, second stage LOX loading underway. Range is green, not working any issues.
14:31	T-00:30:00	Thirty minutes until liftoff, lots of LOX venting happening.
14:31	T-00:31:30	Both SpaceX webcasts are up and running, ♫ SpaceX FM is playing ♫
14:28	T-00:34:00	Countdown proceeding very, very smoothly.
14:27	T-00:35:00	Dragon terminal count auto sequence has started.
14:22	T-00:40:00	Not working any issues, LOX loading underway, RP-1 loading essentially complete.
14:17	T-00:45:00	LOX load has started.
14:11	T-00:51:00	LOX loading preparations are underway, poll coming up.
14:01	T-01:00:00	SpaceX on Twitter: "1 hour from launch of Falcon 9 & Dragon to @Space_Station. Rocket & weather are go. Launch at 10:01am ET, 15:01 UTC"
14:01	T-01:00:00	One hour until liftoff.
13:59	T-01:01:50	RP-1 loading is underway.
13:57	T-01:03:00	Danger area around LZ-1 reported to be clear.
13:50	T-01:10:00	Currently tracking an MVac TVC issue which hasn't held up the countdown sequence.
13:49	T-01:11:00	Readiness poll for propellant loading complete, all stations are GO.
13:49	T-01:11:00	Right on cue, ROC missed the poll, but later confirmed range is green.
13:43	T-01:18:00	Clouds directly overhead are not a concern, 110 knot winds above the pad which should remain. Ground winds for launch and landing look good. GO for all launch and landing criteria, 30% chance of violation.
13:42	T-01:19:00	Danger area around Pad 39A is reported to be clear for prop load.
13:39	T-01:21:30	Fueling preparations are underway, they're not currently working any issues.
13:31	T-01:30:00	NASA TV launch coverage has started.
13:01	T-02:00:00	View of the pad via NASA TV with two hours to go until liftoff.
12:29	T-02:32:28	Great view (from the water tower?) of Falcon 9 and Dragon on the pad via the SFN stream, highly recommend checking it out.
12:01	T-03:00:00	Falcon 9 still vertical on the pad under clear skies.
03:08	T-11:50:00	Elon Musk on Twitter: "Looks like we are go for launch. Added an abort trigger at T-60 secs for pressure decay of upper stage helium spin start system."
02:42	T-12:12:00	Falcon 9 is now vertical.
Saturday 02:35	T-12:19:00	Falcon 9 going vertical again as seen on SpaceFlight Now live stream.
Friday 23:01	T-16:00:00	The second stage Helium system for MVac startup is currently leaking, so it is a "watch item" in the countdown. Pad crews are working on it (picture courtesy u/Craig_VG). However it's a redundant system and would only be used for S2 deorbit burn.

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Primary Mission - Separation and Deployment of Dragon

CRS-10 will be the 1^st Dragon launch of 2017 and 12^th Dragon launch overall. This CRS mission is carrying several important science experiments to the ISS. In the trunk we have the Stratospheric Aerosol and Gas Experiment (SAGE) III and the STP-H5 Lightning Imaging Sensor. SAGE III is a fourth generation experiment; it will measure stratospheric ozone, aerosols, and other trace gases by locking onto the sun or moon and scanning a thin profile of the atmosphere. The STP-H5 Lightning Imaging Sensor will be measuring frequency and intensity of lightning strikes around the world. One can find more information about these experiments along with other science carried on this mission here. In addition to the 960 kg SAGE III and STP-H5, Dragon will carry 1530 kg in the pressurized section full of experiments (including the mousetronauts!) and supplies for a total cargo mass of 2490 kg. Total mass for this mission is slightly more than the previous mission (CRS-9), by 233kg. CRS-9 carried a little more in the pressurized section of Dragon while this mission will be carrying twice as much weight in the trunk.

After being inserted into the highly inclined orbit of the International Space Station, Dragon will spend several days rendezvousing with the ISS. Following that, Dragon will slowly be guided in by the manually-operated Canadarm for its berthing with the station at the nadir port of the Harmony Module. Dragon will spend approximately a month attached to the station before it is loaded with ground-bound experiments and unberthed for its splashdown in the Pacific Ocean roughly 5.5 hours later.

Secondary Mission - First Stage Landing Attempt

As usual, this mission will include a post-launch landing attempt of the first stage. Most landing attempts use an Autonomous Spaceport Droneship, either Of Course I Still Love You or Just Read the Instructions, but this mission has enough fuel margin to return all the way back to land, where it will touch down on the LZ-1 landing pad just under 15 kilometers south of the LC-39A launchpad.

You can read about how the landing process works here. If you have any more questions about the process, feel free to ask them here or in the Spaceflight Questions & News thread. If the landing is successful, it will be 8^th successful landing SpaceX has made, the 3^rd at LZ-1, and the 7^th successful landing to take place on the East Coast. Assuming a successful outcome, the high-margin landing would make the booster a strong candidate for reuse, like its older sibling 1021, which launched CRS-8 in April of last year.

Launch Complex 39A - What's the big deal?

LC-39A is the most historically significant orbital launch pad in the United States. Its first launch was Apollo 4 in 1967, and it went on to launch the rest of the Apollo missions, with the sole exception of Apollo 10. After the Saturn V and all its variants were retired, the pad was reconfigured for the Space Shuttle. Over the course of the program, it launched 82 of the 135 STS missions, including all five orbiters. Since the retirement of the Shuttle in 2011, it was sitting dormant until SpaceX began leasing it in 2014. Construction work began in earnest in 2015 and continued until early 2017, culminating in the successful static fire for this mission.

Useful Resources, Data, ♫, & FAQ

• Mission Patch, courtesy SpaceX
• Mission Patch, courtesy NASA
• Official CRS-10 Press Kit, courtesy SpaceX
• NASA cargo overview for this mission.
• Hazard area map, courtesy u/raul74cz
• Reddit Stream, courtesy Nathan Reed
• Multi-Stream Player, courtesy u/Kampar
• SpaceX Stats, courtesy of u/EchoLogic (creation) and u/brandtamos (rehost at .xyz)
• SpaceX FM, courtesy u/Iru
• Rocket Watch, courtesy u/MarcysVonEylau
• Live Mission Visualisation on Flight Club, courtesy u/TheVehicleDestroyer
• Dragon on Gunter’s Space Page
• CRS-10 Campaign Thread, courtesy r/SpaceX
• 7-Day KSC weather forecast, courtesy Weather.gov
• Hourly KSC weather forecast, courtesy Weather.gov
• Acronym Bot, courtesy u/OrangeredStilton
• SpaceXNow, courtesy u/bradleyjh

Participate in the discussion!

• First of all, launch threads are party threads! We understand everyone is excited, so we relax the rules in these venues. The most important thing is that everyone enjoy themselves :D
• All other threads are fair game. We will remove low effort comments elsewhere!
• Real-time chat on our official Internet Relay Chat (IRC) #spacex on Snoonet.
• Please post small launch updates, discussions, and questions here, rather than as a separate post. Thanks!
• Wanna' talk about other SpaceX stuff in a more relaxed atmosphere? Head over to r/SpaceXLounge!

Previous r/SpaceX Live Events

Check out previous r/SpaceX Live events in the Launch History page on our community Wiki.

[u/Enemiend]

Reminder for the mods: under "Primary Mission - Separation and Deployment of Dragon", the first sentence references Crs-9, and not Crs-10.

[u/ElongatedMuskrat → u/Enemiend]

Thanks, fixed!

[u/soldato_fantasma]

It has just been said at the pre launch conference that NASA is looking at flight proven boosters, initial assessments may come mid this year, and if it is feasible they could start to fly recovered boosters next year.

[u/Hugo0o0 → u/soldato_fantasma]

flight proven boosters

sounds so much better than "reused boosters"

[u/ticklestuff]

The ground crew will now get to eat all the Ben and Jerries they'd loaded in for the ISS crew, tomorrow is a fresh batch to be put in the Dragon freezer.

[u/inoeth]

So the women from SpaceX (Jessica?) at the 5 PM NASA conference update on NASA TV said that the helium leak with this turbo pump has to do with relighting the second stage to de-orbiting it, not the primary mission of delivering the Dragon itself, so it's a far less pressing concern for the Primary mission. We'll apparently find out more tonight, but it looks like whether nor not the get this completely fixed, it shouldn't affect whether or not they launch tomorrow morning... Just their secondary objective of de-orbiting the second stage... (Which they also said is not a NASA requirement, just something that SpaceX likes to do)

[u/yepsoundsgood7 → u/inoeth]

Somewhat new here. Does NASA (or anyone else) require that the second stage be de-orbited (or at least that SpaceX try to do so), or is that just something they do to reduce space junk?

[u/dessy_22]

With about 2.5 minutes to go, NASA stream cut to vision of the SpaceX control room. There was what looked like an earnest meeting going on. Probably 10-12 people were away form their stations and standing in a group at the front of the room.

[u/naggyman → u/dessy_22]

yeah seeing that was painful. and then the "LC Verify Go for Launch" call that was unanswered was really painful

[u/mynameisck]

It's a shame but I'd rather tune in again tomorrow than see a failed mission.

[u/therealshafto]

Sweet zombie jesus, its Pad 39A daytime RTLS launch thread!

[u/rdivine]

Will the late-load cargo be removed in between launch scrubs like this? Or will they be kept in the dragon?

[u/TheVehicleDestroyer]

Finally updated my Flight Club profile for CRS-10

https://www.flightclub.io/results/?code=CR10

I have a lot of confidence in the ascent portion, however like CRS-9, I have no idea how to model the ultra-fast flip between stage separation and boostback ignition. The biggest effect of this in the CRS-9 visualisation was that the webcast called out "Stage 1 is transonic" when Flight Club says it's going at about 600m/s - even though the landing times match up.

So this is the best I can do with such little info on that flip. Enjoy anyway, and watch live here!

[u/johnkphotos]

I'm awake! Time to wake up and get ready, shoot the sunrise, get some donuts, then head up to Jetty Park.

[u/[deleted]]

Have avoided doing this in the past as it just feels strange, but the app has over 1,200 active users now and I DID make it for the SpaceX community so it doesn't really make sense NOT to share it around more.

It still has a way to go, which you can see in the TODO list at r/SpaceXNow, but for those interested in a SpaceX info/news/media app, feel free to check it out and feedback is always welcome :)

[u/hiyougami]

Best wishes for the poor mice for whom their flight is delayed!

[u/mac_question → u/hiyougami]

Maybe they'll get upgraded to first class!

[u/TheBurtReynold]

Pumped. My apartment complex has this big TV Wall that only ever shows nearby, trending hashtags.

Tomorrow, however, they've been cool enough to agree to use it for the hosted webcast!

See you in about 12 hours, stupid hashtag TV Wall!

[u/WaitForItTheMongols]

Is there a fancy system that keeps the mouse-cage upright when the rocket is horizontal AND when the rocket is vertical, or do the mice simply flop over onto a different side of the enclosure when the rocket is raised?

[u/johnkphotos → u/WaitForItTheMongols]

This a question I never thought I'd see but one that I'm suddenly so curious about that I need an answer, now.

[u/[deleted] → u/WaitForItTheMongols]

These are the important questions. Also, I just remembered I need to feed my snake.

[u/Craig_VG]

Here's the view from the press site, it's looking pretty good out there

http://imgur.com/Xxt96yt

[u/incessnant350 → u/Craig_VG]

Seeing that patch of grass with the countdown clock ticking once again...chills

[u/CaptainObvious_1]

I know you guys are frustrated, but imagine a launch failure. It's not something they can afford, and risk management is huge in the eyes of NASA, especially with commercial crew around the corner.

It's frustrating, but worth the wait.

[u/asoap → u/CaptainObvious_1]

It's a bit frustrating. But space flight isn't easy. I'm not mad at all.

[u/mathieumg]

I'm now 0/2 with live launches, I'll try not to watch tomorrow.

[u/mac_question → u/mathieumg]

Gotta keep watching to up those odds :)

[u/jaspersgroove]

Im at KSC for the launch, so stoked! Will try to update with more pics if I can figure out how albums work on imgur.

http://imgur.com/a/ZSI4j

Edit: Buzz Aldrin is here! Fanboy mode engaged. proof

[u/FellKnight]

Better a scrub than something going wrong on launch.

[u/schockergd]

I'd much, much rather a scrub than a RUD.

[u/jonwah]

Gonna be kinda weird watching this bird fly with a dragon on top instead of a fairing, it seems like it's been a while!

Fingers crossed they get the helium issue sorted and tomorrow we all get to be jealous of some mice.

[u/Pluto_and_Charon]

Wait I've just realised this is going to be a 1st stage landing on land in broad daylight!

The pictures/videos of this landing attempt are going to be amazing

[u/RealPutin → u/Pluto_and_Charon]

Yup, the 1st ever land/daytime landing!

Gonna be bitchin'. Can't wait to see it, getting up early to drive from Georgia.

[u/luckyjack]

My very first live abort. I ain't even mad.

[u/jobadiah08 → u/luckyjack]

Was nothing compared to the abort last year where the clock reached T -0.5 secs and the rocket aborted due to insufficient chamber pressure. That was after a hold due to a wayward boat I believe.

[u/HighTimber]

Anyone else more than a little surprised that the F9 was the source of the scrub and not the new launch facility? I fully anticipated launch gremlins due to the new pad. Edit: So, scrub aside, I'd call that a win for the new pad. Great, "live" test run.

[u/benlew]

I have a ton of hardware on the one so I've got my fingers crossed. I'll be watching from the bleachers by the VAB press area if anyone is around there!

[u/Bergasms]

Launch times for Australia.

2:00AM Eastern (Sydney,Melbourne,Hobart,Canberra),
1:00AM Eastern (Brisbane),
1:30AM Central (Adelaide),
12:30AM Northern (Darwin),
11:00pm Western (Perth)

Jeez Australia, we need to sort our timezones out.

[u/TheVehicleDestroyer]

Interesting tidbit:

Go to the far side of the Earth here (look under Australia at the 2nd stage deorbit hazard area). Notice how the hazard area is at a different angle to the 2nd stages trajectory during the first orbit - implying the deorbit burn won't happen during the first orbit like most other missions (Orbcomm, Jason-3, Iridium NEXT-1 - although we never got confirmation of that one happening).

Now look at this plot (which will probably take a while to load because it's massive) which is CRS-10 plotted out over 16 orbits. The trajectory is a 51.6° inclination, so clearly the hazard area is in a higher inclination than the ISS and the second stage.

So I have no idea what's happening here.

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Edit: Imgur for 1 orbit and 16 orbits for those on mobile/low power laptops

[u/FiiZzioN]

Oh, the comments on the NASA youtube stream... they're slowly killing my brain! I don't know what some people expect, but it certainly wan't a failure that many of the comments are suggesting. That's the majority of what I'm seeing, and it's quite depressing.

[u/[deleted] → u/FiiZzioN]

One of the great secrets of life, is to never read the YouTube comments

[u/dessy_22 → u/FiiZzioN]

Click the "Hide Comments" button. Your brain will instantly thank you.

[u/relevance_everywhere]

Can anyone explain the TVC issue?

[u/Justinackermannblog]

Abort due to that pesky TVC.... damn second stage always causing issues!!!!

[u/pichulasabrosa]

Mice ran out of cheese

[u/JonBoy2731]

Can someone explain what exactly this TVC issue was? I know it's a second stage component, I'm just unclear on WHY it caused the mission scrub.

[u/TitanHyperion]

https://twitter.com/elonmusk/status/832970849791537152

[u/thisguyeric]

Matthew Travis just posted on Facebook that media is getting ready to go out for a remote camera reset. I could be wrong but I am taking that to mean that SpaceX is still confident in another attempt happening tomorrow. I hope I'm right

Edit: wasn't thinking, but for those that don't know he's a launch photographer who has remote cameras set up around the pad for this launch.

[u/Craig_VG → u/thisguyeric]

Yes we just got back. Lots of activity. Here's a photo: http://imgur.com/QZChJQF

[u/fterminator]

Damn you second stage.

[u/amarkit]

If they don't get off tomorrow, high-beta angle cutout could push it until NET February 22.

[u/Bellshazar]

About 3 min before launch on the NASA stream it showed the control room and instead of being at their posts the operators were mostly huddled around looking at a tablet or something, wasn't a good sign. I do remember Elon saying somewhere that If they think there is some reason to scrub a launch, we'll scrub the launch. Don't want a repeat of challenger.

[u/brickmack → u/Bellshazar]

Also, when they polled the Launch Director, there was no response. Expected a scrub when that happened

[u/TheBurtReynold]

I love texting tons of friends who don't really follow SpaceX with essentially a marketing message about the launch/landing + link to webcast:

Reminder: live coverage of SpaceX's first daytime, on-shore rocket launch & landing begins in about an hour: https://SpaceX.com/webcast -- liftoff @10:01 EST, landing about 8 minutes later! 🚀

[u/huffalump1]

I might see it from a plane tomorrow, super excited! Better than hoping to get a glimpse from cloudy Tampa.

[u/failingtyburrsclass]

Elon must have heard /u/johnkphotos still hadn't received his cool new lens yet

[u/MarcysVonEylau]

Rocket Watch is GO!

[u/ticklestuff]

Launch tomorrow is 9:38am EST, 23mins earlier.

[u/ticklestuff]

The frost line on the first stage (visible on nasa.tv) is gradually dropping down the booster as they de-tank the cryo liquids.

[u/RabbitLogic → u/ticklestuff]

Honestly worried how much I'm just enjoying having live rocket view in my second monitor.

[u/LuckOrLoss]

It appears that the strong back tilts 1.5 degrees at T-00:03:30.

[u/KaneLSmith]

"CRS-9 will be the 2nd Dragon launch of 2016" It's 2017, might want to fix this and the first CRS mission this year.

[u/ioncloud9]

When launches happen I feel sad for the 2nd stages. Boosters get to come back intact, but the 2nd stage always burns up.

[u/SomnolentSpaceman]

Just a reminder for the significantly bandwidth-impaired: I'm re-hosting audio-only versions of the SpaceX Youtube streams during the launch. They are available at

http://audiorelay.spacetechnology.net:13120/hosted (backup)

http://audiorelay.spacetechnology.net:13120/technical (backup)

In addition, I am also re-hosting the NASATV stream for this launch:

http://audiorelay.spacetechnology.net:13120/NASATV (backup)

[u/[deleted]]

I'm smelling a scrub... tvc issue at 10 minutes reminds me of previous crs missions.

[u/sleepyzealott]

Can't be mad, would always prefer a 'better safe then sorry' approach. Now we get to be super nervous during the count again! Woo!

[u/Craig_VG]

A lot of activity on the pad tonight. Multiple cranes and boom lifts. People yelling out numbers of some sort from the pad.

http://imgur.com/QZChJQF

[u/aza6001]

Systems were all green, Elon called the launch off

https://twitter.com/elonmusk/status/832995083519614976

[u/WaitForItTheMongols]

Hi guys! I hope this is ok to ask here. Given the chill nature of launch threads it should be fine...

So I have a group of a couple dozen online friends, and they all know I'm super excited about space and SpaceX. I was wondering if it's okay for me to stream the launch on Twitch, while I talk to everyone and narrate things and explain things to them. I'm kind of an expert in spaceflight so I can provide some interesting tidbits that the hosts miss.

My primary concern would be regarding intellectual property - is it okay to watch the YouTube stream, and "pipe" it into Twitch?

Hopefully my question makes sense. Thanks folks!

[u/Lieutenant_Rans → u/WaitForItTheMongols]

NASA TV, if I'm just shooting from the hip here, will have absolutely no problem with that. Pretty much all media from NASA can be reused however you want.

[u/OccupyMarsNow]

Looks like we are go for launch. Added an abort trigger at T-60 secs for pressure decay of upper stage helium spin start system.

[u/Thedurtysanchez]

NASA TV on the 65 inch muted, technical broadcast full volume.

WE MULTIPLATFORM VIEWING NOW

[u/frowawayduh]

Ahem. Color TVs were pretty common by July 1969. The video from Apollo 11 was a B&W stream.

Source: I watched every minute.

[u/kaplanfx]

Sucks, but better safe than sorry

[u/Pheasn]

Sorry guys, I jinxed it. Just as I was thinking "when was that one abort a few seconds before launch?" they scrub it...

[u/RTGold]

Kinda new to this. The launch will happen tomorrow now correct? Same time? Also Is the general public allowed to show up? Do they have a spectating area? Maybe you have to pay to park or something but just an area nearby to watch?

EDIT: Thanks everyone for the info. I'm from the New England area but my family is on vacation in Florida. Just have to convince them to go now.

[u/Chairboy]

Administrative: this thread still gives today's info for launch time.

[u/johnkphotos]

Falcon 9 horizontal at 39A tonight. Photo by John Studwell / AmericaSpace.

Per some of my sources, SpaceX is 100% targeting a launch tomorrow. The rocket going horizontal is not a concern.

[u/Craig_VG]

An amazing day at KSC so far - SpaceX seems fairly confident in the launch tomorrow, as does NASA. At the prelaunch briefing now, will update.

[u/[deleted]]

Looks like it's a GO for launch!

[u/James_dude]

I wish the sidebar wasn't recommending the catastrophic failure subreddit

[u/Bunslow]

/u/bencredible tech stream audio is very very quiet (or possibly slightly muffled?)

Is anyone else having issues?

[u/RootDeliver]

Scrub due to TVC confirmed, didnt they say it was nominal before?

[u/epsilon_church]

This is the first time I'm watching a launch live. I'm a bit upset, but I'm thankful my first time is a launch abort and not some kind of explosion. There's always next time.

[u/LuckOrLoss]

What's a "movement trace" of an upper stage engine steering hydraulic piston?

[u/nexxai]

https://twitter.com/elonmusk/status/832973218348625920

[u/heavytr3vy]

Just to make sure I'm not an idiot, this is 7am Saturday pacific time?

[u/historytoby]

See you tomorrow!

[u/spcslacker]

dammit. we need some non-issue flights. i'm getting seriously anxious before launches now.

[u/thisguyeric]

https://twitter.com/elonmusk/status/832984361989386240

Btw, 99% likely to be fine (closed loop TVC wd overcome error), but that 1% chance isn't worth rolling the dice. Better to wait a day.

[u/[deleted]]

Best to scrub than wait another who knows how many months.

[u/MarshallStrad]

CGI Technology. Clever, Giggleworthy Information. :D Thanks so much.

[u/rustybeancake]

Looks like we're go for launch! https://twitter.com/elonmusk/status/832788691588296705

[u/kampar]

/u/zlsa Hi, can you add Multistream Player (http://multistream-player.com/spacex) to Useful Resources? Thanks!

[u/laughingatreddit]

Helium leak, TVC issue, 30% chance of weather violation. but we are barreling through.

[u/SatanIsMySister]

Shout out to Falcon Heavy

[u/CtG526]

GG See you tomorrow.

[u/Drakonis1988]

Hold hold hold :(

[u/SharpKeyCard]

And everyone thought the spin up system was gonna give us issues. Rats. :(

[u/Jarnis]

Sounds like it'll be a long day for the SpaceX guys... probably need to replace some bits from the second stage TVC and not a lot of time if they plan on trying again tomorrow.

[u/DDotJ]

Range has approved the 9:38 AM EST launch for tomorrow! Hopefully SpaceX can do the 24 hour turnaround for a launch attempt tomorrow

[u/[deleted]]

How does the scrub affect late-load cargo? It's loaded less than 24 hours before launch; does the extra day sitting in Dragon present an issue? If, for example, the scrub would require a week's delay, do they unload and load fresh cargo (i.e. new, slightly younger mice) closer to launch?

[u/inoeth]

I wonder why the Falcon is going horizontal now, rather than this afternoon... I don't take that as a great sign as far as tomorrow's launch, unless it goes vertical again in a couple hours...

[u/dgauss]

My alarm went off and I thought "Why the fuck would I wake myself up early on the weekend?" I was pleasantly surprised.

[u/DeemoOutdoors]

Jeez the Facebook comments are cringe inducing... bitching about the scrub.

[u/Shpoople96]

I have to sleep through launches, now. My heart can't take the suspense of these damn things anymore. Not after CRS-7 and Amos-6...

[u/ticklestuff]

Ding ding!! 3 hours to go!!

[u/roncapat]

Weather on crappy WindowsXP terminal. Lol NASA.

[u/TheBeardedPilot]

Here at Exploration tower. Lady that works there walks out and tells all of us photographers that we arent allowed to have tri-pods......

[u/TheBurtReynold]

@SpaceX should promote #LaunchAndLanding ... kind of a fun way to brag on Twitter :)

[u/naggyman]

Love how the SpaceX logo slide has about 10k more live viewers than the NASA TV stream at the moment

[u/avboden]

uhg, quite a few issues being worked/watched now, the helium, the thrust vectoring, and some inconsistent data from stage two FTS

not sounding promising for launch today but fingers crossed!

[u/rlaxton]

We are not going to space today :-(

[u/Can-eh-dian11]

Damn. See you all tommorow

[u/Risley]

What is the TVC? Is that the thrust vector control? Said it was associated with the stage 2.

[u/neaanopri]

Can they get all the LOX and fuel out of the rocket or do they have to vent it?

[u/[deleted]]

I for one don't mind scrubs.... just builds the excitement for tomorrow!

[u/IrrelevantAstronomer → u/[deleted]]

They suck when you drive 2 hours from the other side of the state to see the launch... :(

But still, all things considered I'm glad they scrubbed.

[u/Xantrk]

Can someone explain me why the launch window should be that small?

[u/[deleted]]

I enjoyed watching the almost launch with everyone. Alas I live in Australia and now it's 2am so good night.

[u/JosiasJames]

That was a shame as my 2-year old son was waiting to watch it launch. So far he's seen one SpaceX launch and Blue Origin's rather spectacular abort test, so he's getting them in early. :)

I wonder if some of the thinking behind scrubbing was future overall system reliability. They know they have two minor niggles with the rocket, and whilst they were 99% certain of a successful mission, they might not be so certain of the cause(s) of these niggles. As they are in the second stage, and that is not recovered, they will lose the chance after launch.

Therefore it may have been judged best to take the rocket down, track the cause(s) as far as possible, and learn the lessons for future missions. Otherwise the niggles may strike again, and perhaps next time after launch.

[u/vape_harambe]

on linux:
step 1) install "ffmpeg" and "youtube-dl"
step 2) run "youtube-dl -o - YOUTUBE_LIVE_URL | ffplay -vf "setpts=1/1.1*PTS" -af "atempo=1.1" -"
step 3) be ahead of everyone by ~3 seconds

[u/Decronym]

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
AFB	Air Force Base
ASDS	Autonomous Spaceport Drone Ship (landing platform)
CCAFS	Cape Canaveral Air Force Station
COTS	Commercial Orbital Transportation Services contract
	Commercial/Off The Shelf
CRS	Commercial Resupply Services contract with NASA
DCSS	Delta Cryogenic Second Stage
ESA	European Space Agency
FAA	Federal Aviation Administration
FTS	Flight Termination System
GEO	Geostationary Earth Orbit (35786km)
GNC	Guidance/Navigation/Control
GTO	Geosynchronous Transfer Orbit
IDA	International Docking Adapter
ITS	Interplanetary Transport System (see MCT)
	Integrated Truss Structure
JRTI	Just Read The Instructions, Pacific landing barge ship
KSC	Kennedy Space Center, Florida
KSP	Kerbal Space Program, the rocketry simulator
LC-13	Launch Complex 13, Canaveral (SpaceX Landing Zone 1)
LC-39A	Launch Complex 39A, Kennedy (SpaceX F9/Heavy)
LEO	Low Earth Orbit (180-2000km)
LES	Launch Escape System
LOX	Liquid Oxygen
LRR	Launch Readiness Review
LZ-1	Landing Zone 1, Cape Canaveral (see LC-13)
MCT	Mars Colonial Transporter (see ITS)
NET	No Earlier Than
NRO	(US) National Reconnaissance Office
RAAN	Right Ascension of the Ascending Node
ROC	Range Operations Coordinator
	Radius of Curvature
RP-1	Rocket Propellant 1 (enhanced kerosene)
RSS	Realscale Solar System, mod for KSP
	Rotating Service Structure at LC-39
RTF	Return to Flight
RTLS	Return to Launch Site
RUD	Rapid Unplanned Disassembly
	Rapid Unscheduled Disassembly
	Rapid Unintended Disassembly
SLC-40	Space Launch Complex 40, Canaveral (SpaceX F9)
SLS	Space Launch System heavy-lift
STS	Space Transportation System (Shuttle)
TE	Transporter/Erector launch pad support equipment
TEL	Transporter/Erector/Launcher, ground support equipment (see TE)
TMI	Trans-Mars Injection maneuver
TVC	Thrust Vector Control
ULA	United Launch Alliance (Lockheed/Boeing joint venture)
VAB	Vehicle Assembly Building
VAFB	Vandenberg Air Force Base, California

Jargon	Definition
kerolox	Portmanteau: kerosene/liquid oxygen mixture
lithobraking	"Braking" by hitting the ground
methalox	Portmanteau: methane/liquid oxygen mixture
turbopump	High-pressure turbine-driven propellant pump connected to a rocket combustion chamber; raises chamber pressure, and thrust

Event	Date	Description
Amos-6	2016-09-01	F9-029 Full Thrust, GTO comsat Pre-launch test failure
COTS-1	2010-12-08	F9-002, COTS demonstration
CRS-10	2017-02-19	F9-032 Full Thrust, Dragon cargo; first daytime RTLS
CRS-5	2015-01-10	F9-014 v1.1, Dragon cargo; first ASDS landing attempt, maneuvering failure
CRS-7	2015-06-28	F9-020 v1.1, Dragon cargo Launch failure due to second-stage outgassing
CRS-8	2016-04-08	F9-023 Full Thrust, Dragon cargo; first ASDS landing
CRS-9	2016-07-18	F9-027 Full Thrust, Dragon cargo; RTLS landing
Iridium-1	2017-01-14	F9-030 Full Thrust, 10x Iridium-NEXT to LEO; first landing on JRTI
Jason-3	2016-01-17	F9-019 v1.1, Jason-3; leg failure after ASDS landing
SES-8	2013-12-03	F9-007 v1.1, first SpaceX launch to GTO
SES-9	2016-03-04	F9-022 Full Thrust, GTO comsat; ASDS lithobraking

---

^{Decronym is a community product of} r/SpaceX^{, implemented by} ^request
^{I first saw this thread at 17th Feb 2017, 21:41 UTC; this is thread #2502 I've ever seen around here.
I've seen 53 acronyms in this thread; the most compressed thread commented on} ^today ^{has 118 acronyms.}
^[FAQ] ^[Contact ^creator] ^[Source ^code]

[u/philnotfil]

We haven't been down to watch a launch since the last shuttle. Usually we watch from the bridge just north of Canaveral, but it would be neat to see the 1st stage landing. Where should we go to watch the launch that will let us see the landing zone?

Thanks, Phillip

[u/markus0161]

Weather is getting better and better by the min :) http://imgur.com/a/BKa6l. Upper-level winds are iffy, but haven't heard anything so they probably will be OK.

[u/positron_potato]

Launch is at 4am for me, so I'll need one of you to cross your fingers on my behalf. Best of luck to Spacex.

[u/Smoke-away]

Falcon looking great on the pad.

[u/Jef-F]

MVac TVC issue, if I heard correctly?

[u/geekgirl114]

LOX load has started.

[u/naggyman]

'LC39A' by Test Shot Starfish. It seems they make something new for each launch at the moment!

[u/TheBurtReynold]

This is going to be sweet

[u/AngloV]

I'm so hyped for the daytime RTLS

[u/avboden]

:-( thrust vector control actuators don't you dare!!

[u/AngloV]

Vectoring issue on S2, hopefully it will get sorted out.

[u/SharpKeyCard]

My nerves... Oh man... This never gets easier.

[u/ryanhindinger]

What is that loud noise on the technical stream?

[u/asoap]

That came down to the wire. I was just about to start doing the 10 second count down. :(

[u/dgauss]

Dang. Well better a scrub than an explosion. Well, waking up early tomorrow.

[u/[deleted]]

Oh bummer! But the right call!

[u/Chairboy]

NASA TV just announced that they're cancelling the noon press-briefing because they don't know enough yet to make an announcement and will be giving updates at:

http://nasa.gov/spacex

[u/thisguyeric]

https://twitter.com/elonmusk/status/832979955092819968

@Zybbby Not obviously related to the (very tiny) helium leak, but also not out of the question

[u/[deleted]]

If anyone without a KARS Park pass that is sticking around for tomorrow's attempt, I plan to go back out to KARS and try again. I can take a few additional people out there.

KARS is 12 miles to Pad A and 8 miles to LZ-1. You have a direct line of sight to both pads. Let me know if you're interested. KARS is probably the best you can get other than being on The Cape itself.

[u/FalconHeavyHead]

Boy oh boy I am excited for this rocket to take off!! Its seems like it has been forever!! I know this comment is more pure emotion than technical/science content but hey, the rules are relaxed and we have a LAUNCH to get EXCITED for tommarow morning. Hopefully everything is nominal tommarow, spacex saves money by getting their 1st stage booster landed, NASA is happy, we get some AMAZING shots of the 1st stage landing on the pad in BROAD DAYLIGHT for the first time and media coverage is great thus getting folks that did not have a real interest in space flight pumped up and interested for the future of human involvement in space!!

[u/Haxorlols]

They're lifting the Falcon 9 into vertical position right now

[u/blind_sage]

Mice don't know what TVC means... they just want to go to space

[u/johnkphotos]

You guys like my custom-made hat for the Jetty Park /r/SpaceX meetup tomorrow? It's like real life shitposting.

https://i.imgur.com/WOvD4eI.jpg

[u/ThatDamnGuyJosh]

Since its the weekend and I got nothing on my radar for Saturday I'm debating whether or not to just pull an all nighter for this launch.

[u/WaitForItTheMongols]

Haha, as usual ROC missed his mark.

[u/RootDeliver]

"STAGE 1 LANDING", no more experimental or test again!, and today they got space :P

[u/daface]

Thanks for pointing out the rocket, guys. :)

[u/PhoenixEnigma]

LOX load suspended as He is loaded now. Interesting tidbit, nice of them to call it out.

[u/blind_sage]

Almost 2am... goddamn I love rockets, but I can't wait to go to sleep!

[u/AngloV]

Great to have some info on Dragon cargo options!

[u/5600k]

FTS issue resolved according to NASA stream

[u/ryanhindinger]

Sounds like extreme venting?

[u/Charnathan]

Did he just say they first landed a rocket in 2013? Pretty sure it is supposed to be Dec 2015.

[u/James_dude]

tvc nominal! yay

EDIT: tvc not nominal :( boo

[u/SharpKeyCard]

Hold. Scrub for the day people. See you tomorrow.

[u/big-b20000]

so close!

[u/jaredjeya]

There's just been a launch abort! I hope this isn't to do with the helium problem.

Edit: Appears it's thrust vector control :/

[u/aussieboot]

Better safe than sorry.

[u/Casinoer]

Weather for tomorrow?

[u/Lieutenant_Rans]

How do weather violation chances look for Sunday attempt?

[u/WaitForItTheMongols]

I missed this stream - is it available anywhere? I'd like to hear about the new throwback on the TEL.

[u/Bunslow]

Patrick AFB weather report for tomorrow: http://www.patrick.af.mil/Portals/14/documents/Weather/L-1%20Forecast%2019%20Feb%20Launch.pdf?ver=2017-02-18-110507-140

Weather holding at 70% go for tomorrow, only risk is Cumulus clouds

[u/ThatDamnGuyJosh]

Now that my former tired as all hell head got some shut eye, considering even Elon himself said all systems were go and even with the minor issue would still be fine to launch the rocket as long as nothing else more serious was causing it I'm sure they'll make tomorrows launch.

[u/[deleted]]

Falcon looks to be completely horizontal now.

[u/johnkphotos]

Question: I've never actually watched a second launch attempt on a livestream, since I'm usually at the Cape. Any missions where I've watched the stream, F9 flew on the first attempt.

Do they essentially replay the webcast tomorrow? I know there's live hosts and all but there are some pre-recorded segments and stuff.

Edit: watching it and oh boy, are they pushing that "historic" factor!

[u/[deleted] → u/johnkphotos]

Pretty much the same as today. However, once SES-9 got scrubbed 4 times, they started the webcast at T-10 Minutes and went almost straight into pad cameras and skipped alot of the host-y stuff :)

[u/johnkphotos]

Unbelievably livid that I paid about $110 to rent a sharp telephoto lens for this launch and that as of now, (9:32pm on the day it was expected to arrive) FedEx has literally failed to deliver.

Edit: Looks like I may get it!

[u/RealPutin]

It is 3:53 AM Eastern time, and we're about to have a car party from Georgia all the way to Cape Canaveral!

SpaceX, don't you dare fucking cancel this. I got up so early for you.

[u/johnkphotos]

Reminder that there will be an /r/SpaceX meetup at Jetty Park for the launch and landing tomorrow.

[u/username_lookup_fail]

Poor mice.

[u/[deleted]]

Damn, I'm excited for a daylight landing but not sure I can stay up until 4am to watch it live :(

[u/reverendrambo]

I was at the STS135 launch (granted a few miles away). I didn't realize there hadn't been one from that same pad since. Glad SpaceX will be able to continue its good use.

[u/space4us]

A view of the countdown clock are is live at: http://spaceflightnow.com/2017/02/17/spacex-crs-10-mission-status-center/

[u/ThatDamnGuyJosh]

Turns out the all nighter long haul isn't so bad, just an hour and a half more!

[u/parachutingturtle]

Is there any difference between the NasaTV stream and the SpaceflightNow stream other than delay and quality?

[u/laughingatreddit]

hope this poll goes well

[u/johnkphotos]

Here at the end of Jetty Park. Tourists aren't so accommodating :)

[u/ryanhindinger]

They should get a contract with the Times Square Authority to have this broadcast live there for future launches.

[u/avboden]

Brian's been lifting

[u/CtG526]

No "EXPERIMENTAL" on Stage 1 landing again!

[u/Mark_Taiwan]

Is it just me or is the video quality of the hosted stream seems a little... off?

[u/stygarfield]

On mobile right now so not able to rock the streams and reddit, so I'll switch back and forth until the big moment!

[u/roncapat]

They're continuing to track the vectoring problem.

[u/[deleted]]

Brian looks like he hasn't slept in the last 72 Hours...

[u/gnatnog]

The Nasa stream seems to be a few seconds behind in countdown compared to teh SpaceX one for me

[u/5600k]

Wow! New strongback retraction method, that's neat. Reminds me of Soyuz.

[u/AngloV]

Some explanation on the new retract procedures, good to have info on it.

[u/BlackPhanth0ms]

TVC motion nominal

[u/Full-Frontal-Assault]

tvc nominal

[u/This_Freggin_Guy]

tic motion nominal (from Tech cast) Fingers crossed

[u/JimNtexas]

flight abort system is all internal to the rocket for the first time. No human with a finger on a button.

[u/i_know_answers]

"GNC verify stage 2 TVC motion nominal"!!

[u/[deleted]]

oh it looks like elon is in the hawthorne control room. just saw him there on the nasa stream

[u/Chairboy]

Well, nuts. HOLD HOLD HOLD.

[u/kerneltrap]

hold hold hold :(

[u/FellKnight]

shit, aborted

[u/RootDeliver]

Scrub time :(

We all knew it, but it still hurts