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#520
by
Elvis in Space
on 16 Oct, 2013 03:48
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Now we just wait for the footage they shot from a small plane flying near the first stage descent area...
Looks like you did not have to wait long 
I should say things like that more often, maybe I have some hithertoo unknown powers!
I'm assuming this is a screencap from the full video, so hopefully the full thing gets put up on youtube sometime soon.
It doesn't look like video screencaps - this might just be long telephoto shots. There's a chance there might not be any better ones.
The EXIF data on the pictures shows the large one to be a still photo with a Canon SLR and a 400mm lens. It was shot at a film speed of 1250 which on that particular camera would account for the noise in the background. The smaller shot is non specific but that and the histogram data lead me to believe it is a vid cap. Not certain though.
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#521
by
Lars_J
on 16 Oct, 2013 03:49
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Here's a quick comparison... A fond farewell to the distinctive tic-tac-toe layout:
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#522
by
mlindner
on 16 Oct, 2013 06:01
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It doesn't look like video screencaps - this might just be long telephoto shots. There's a chance there might not be any better ones.
I just remember hearing something about SpaceX having gotten footage of the first stage coming back in, taken from a small airplane. IIRC Elon mentioned he had seen the video but I don't remember where he (if it was even him) said it.
There's this tweet, too https://twitter.com/jeff_foust/status/384402628962451456
No mention of where the video is from however, so it might just mean the video we got today.
Elon never talked about not having seen the video. He only talked about not knowing exactly what was picked up in terms of wreckage. (See the post-launch teleconference transcript.)
Asked my friend at SpaceX and yes those photos are screen caps from a video taken by a chase plane (of some sort) and that second image is indeed just before it hits the water.
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#523
by
Silmfeanor
on 16 Oct, 2013 06:06
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It doesn't look like video screencaps - this might just be long telephoto shots. There's a chance there might not be any better ones.
I just remember hearing something about SpaceX having gotten footage of the first stage coming back in, taken from a small airplane. IIRC Elon mentioned he had seen the video but I don't remember where he (if it was even him) said it.
There's this tweet, too https://twitter.com/jeff_foust/status/384402628962451456
No mention of where the video is from however, so it might just mean the video we got today.
Asked my friend at SpaceX and yes those photos are screen caps from a video taken by a chase plane (of some sort) and that second image is indeed just before it hits the water.
wowza!
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#524
by
Comga
on 16 Oct, 2013 06:21
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Asked my friend at SpaceX and yes those photos are screen caps from a video taken by a chase plane (of some sort) and that second image is indeed just before it hits the water.
That's odd, to say the least. If the lower end is the water and the top of the gap is the bottom of the rocket, and the rocket is about 30 meters tall, the altitude is about 20 meters. If it was heading for zero velocity at zero altitude and has 2g of thrust its net acceleration upward is ~10 m/sec^2, it would cover the distance in sqrt(20*2/10)=2 sec and the velocity would be ~20 m/sec. If this image was taken the instant the engine flamed out due to the centrifuging propellants, it would have hit the water only slightly faster. Could that be fast enough to destroy the rocket so that they recover the over-wrapped pressure vessels and parts of the engines?
Or "just before it hits the water" could be on the order of tens of seconds, at several hundred meters altitude, with just some odd atmospheric plume effect that makes it look pancaked and obstructed.
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#525
by
ChrisWilson68
on 16 Oct, 2013 06:26
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Asked my friend at SpaceX and yes those photos are screen caps from a video taken by a chase plane (of some sort) and that second image is indeed just before it hits the water.
There is a contradiction between that claim and what someone else posted about the meta-data on the first of the two photos. Perhaps your friend is mistaken about the first of those two images, and only the second is a screen capture. Even working at SpaceX, he or she might not realize one of them is not from the video. It's hard to explain how else the first image would have meta data attached to it saying it was a still taken by Canon DSLR.
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#526
by
Nydoc
on 16 Oct, 2013 07:01
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Or "just before it hits the water" could be on the order of tens of seconds, at several hundred meters altitude, with just some odd atmospheric plume effect that makes it look pancaked and obstructed.
Could be. I think the plume is actually a spray of foam from the stage hitting the water. This would imply the photo is taken from above and all the blue in the background is water. The rocket would possibly be angled towards the observer slightly.
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#527
by
R7
on 16 Oct, 2013 08:07
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The sea surface gets a prenotice when something large is falling fast but subsonic towards it.
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#528
by
padrat
on 16 Oct, 2013 11:31
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Both shots ARE from the video, which I've seen. And yes the second one is literally a sec before it hits the water.
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#529
by
kevin-rf
on 16 Oct, 2013 11:59
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Looks like quite an oblique angle, I assume caused by the pilots desire to not have the rocket land on the plane. Coming that close, means WOW!
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#530
by
dcporter
on 16 Oct, 2013 12:42
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Both shots ARE from the video, which I've seen. And yes the second one is literally a sec before it hits the water.
A) Is it awesome?
B) Does it look rough enough that we may never see it due to PR concerns (from the "the hot fire test didn't lift off! Failure!" crowd)?
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#531
by
Okie_Steve
on 16 Oct, 2013 13:04
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I've been wondering about the items recovered given that the stage hit "relatively hard". The composite tanks I understand - light weight, probably buoyant, consistent with breakup on impact . However "a number of items from the engine bay" in particular puzzles me. What could be recovered from the engine bay? If the stage broke up I would expect the engines would be history given their mass, would there be ejectable black-box data recorders floating around? Did enough of the stage float long enough to get a buoy on it for divers/robots to follow down? Does not seem likely, but "items from the engine bay" is intriguing. BTW how deep is the water at the landing site? My imagination keeps running amok with the possibilities
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#532
by
kevin-rf
on 16 Oct, 2013 13:16
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... The composite tanks I understand - light weight, probably buoyant, consistent with breakup on impact ...
What composite tanks?
I wonder if some engine components trapped air causing buoyancy.
They have used electable data recorder pods in the past. Be interesting if they have the entire rocket cam footage.
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#533
by
Proponent
on 16 Oct, 2013 13:17
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A caption in the video at 3:19 says "ground station signal acquired over Antarctica." It's little hard to parse that, but it seems to imply that there's a ground station in Antarctica. What's actually going on?
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#534
by
corrodedNut
on 16 Oct, 2013 13:20
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What composite tanks?
Composite overwrapped tanks, most likely the helium spheres.
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#535
by
Jim
on 16 Oct, 2013 13:21
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A caption in the video at 3:19 says "ground station signal acquired over Antarctica." It's little hard to parse that, but it seems to imply that there's a ground station in Antarctica. What's actually going on?
McMurdo Ground Station
http://amrc.ssec.wisc.edu/meetings/MGS/history.html
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#536
by
Elvis in Space
on 16 Oct, 2013 13:27
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Asked my friend at SpaceX and yes those photos are screen caps from a video taken by a chase plane (of some sort) and that second image is indeed just before it hits the water.
There is a contradiction between that claim and what someone else posted about the meta-data on the first of the two photos. Perhaps your friend is mistaken about the first of those two images, and only the second is a screen capture. Even working at SpaceX, he or she might not realize one of them is not from the video. It's hard to explain how else the first image would have meta data attached to it saying it was a still taken by Canon DSLR.
This may be something I need to get my ancient photographic mind wrapped around. Today you can take video with a DSLR and it looks great. Thought hadn't occurred to me until now but given the lenses available for that type of camera it makes sense.
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#537
by
mr. mark
on 16 Oct, 2013 14:14
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The fact that the first stage hit the water intact or nearly intact is definately a WOW moment.
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#538
by
Elmar Moelzer
on 16 Oct, 2013 14:57
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Even working at SpaceX, he or she might not realize one of them is not from the video. It's hard to explain how else the first image would have meta data attached to it saying it was a still taken by Canon DSLR.
Canon DSLRs take excellent Full HD video. IIRC they have full 35mm sensors and allow attachment of extremely large lenses. So I could totally see them use those for filming.
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#539
by
Falcon H
on 16 Oct, 2013 15:00
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The fact that the first stage hit the water intact or nearly intact is definately a WOW moment.
Agreed, I thought that the stage was torn to shreds.
