Himawari |
Himawari |
Jul 21 2015, 05:20 PM
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Senior Member Group: Members Posts: 1632 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Here is a real-time full color view of the Earth from the Himawari satellite, updated every half hour or so. This geostationary weather satellite is stationed over the longitude of Japan. The view is complete with orange sunglint off the ocean. You can click on the link to see the latest update.
http://www.jma.go.jp/en/gms/largec.html?ar...=1&mode=UTC I previously posted this high resolution sample image in the Whole Earth Images thread. We can look around for the full resolution real-time data archive that would be about 11000 pixels wide. -------------------- Steve [ my home page and planetary maps page ]
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Sep 17 2015, 11:49 PM
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#2
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Junior Member Group: Members Posts: 23 Joined: 15-February 14 Member No.: 7141 |
Thanks a lot for the encouragement, all. Most people I mention this to give me a funny look and say something like "wait, why are you doing this?". "Because it's cool!" should be a good enough answer!
The lossless files I make are BIG, around 1 GB or more per minute of video. But they seem to compress well down to ~50-80 MB per minute without any artifacts that I can see. I could probably bring it down a bit further if I tweak some ffmpeg settings. I will probably only keep these compressed copies since my hard drive will fill up soon otherwise I'll work on finding a way to host these somewhere accessible. I would put them on Amazon S3 or something, but I don't want to be on the hook for a big bandwidth bill if the links get posted on a big website or someone hammers them with a script or something. For now I have been putting files on Mega, which gives me 50 GB to play with. It seems to work OK but not ideal. Not sure if I will be able to upload to there automatically using a script. Here's one I uploaded - Japan on 9/11/2015 (80MB), one of my favorites. (Click "download through your browser"). More to come. The most noticeable remaining artifact is the fact that sometimes the color channels on the RGB frames are misaligned by a bit, and the resulting color shift looks odd in the video. I'm not sure how to handle these frames. Detecting and realigning them automatically with a script seems difficult or maybe impossible. I could just manually tag the bad frames, drop them, and interpolate around them, but it somehow it feels wrong to just throw away the data, especially since some are only misaligned by a bit. |
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