Author Topic: SpaceX Falcon 9/Dragon CRS-3 (SpX-3) MISSION GENERAL DISCUSSION  (Read 720294 times)

Offline justineet

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--- Continuing ---

f- (0:21) First indication of plume impinging water.
g-j- (0:22-0:23) Expansion of plume shockwave on sea surface, kicking up surf.
k- (0:23) Last frame showing sea surf and engine exhaust.
l- (0:23) Engine cutoff / contact with the sea. Surf movement visible, but not the engine plume anymore.
m-n- (0:26-0:28) Stage tipping over towards the sea, waves visible climbing up to the camera in the direction shown by arrows in "m". Stage would be falling to the upper right from the camera's point of view.

And I must say, since credit should be given when it's due, that I've criticized SpaceX's disclosure policy quite heavily in the past, but this move to get the raw video out there, with the best attempt at cleaning, is very nice on their part and deserves praise. Hopefully this will evolve into a habit of disclosing more to the interested public, and not just when they need help to publicize something.

Neat work! :) Much pareidolia, but neat work nonetheless :D

And as regards credit. Kudos to them for releasing the Raw version... but if they were going to post the raw version anyway, shouldn't they have done so ages ago? Spared their software engineers (who may not be video editing specialists) the work? Or allowed them to do the same work, by soliciting help from the very beginning? </Nitpicking> would be nice if some one does an animation of the stage entrance and landing on sea based on the video data..

Offline Comga

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From the Updates thread

The first (4:23) and second (5:55) departure burns are done with nine and twelve pulses of a pair of Draco thrusters.
Is this how they get precision on the delta V?

I am also surprised that the thrusters appear to be pointed right at the camera, which I assume means right at the station, although the close-up camera is on the arm.  I would have thought that they would have fired in the velocity direction, but that does take a while for the new lower orbit to increase the separation.
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline Thunderbird5

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Splashdown confirmed. Still curious to know how the permanent water intrusion measures worked out.