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by dasmoth
3354 days ago
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Video from space has been done by civilian spacecraft, e.g.: https://terrabella.google.com/
We know that the film-return satellites were working in push broom mode (or "whisk-broom", as I've seen the KH-9 cameras described). I have little doubt that the primary observation mode of the follow-on electro-optical systems is also push-broom. But not sure I'd want to rule out the possibility that the more recent blocks might also have some kind of staring mode (which could plausibly give video of small-ish areas). They're still pretty secretive birds. |
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The ground wind speed at the time of eruption was below 5 m/s, i.e. the video plays much faster then real-time.
If you’ll download the video, pause it, skip between frames, you’ll notice different parts were shot from different positions and with different resolutions.
They probably abused the fact clouds move in very predictable manner. They took several satellite images from whatever satellites happen to pass roughly above the volcano, and used creative video editing to make a smooth video from those several frames.