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license: apache-2.0
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249,058 pairs of Himawari-8 & 9 band 03(red) visible imagery, in 500m and downscaled to 2km. 
note: 500m & 2km is nadir spatial resolution, doesn't meet this at high zenith angle near the edge.  
500m in 2048x2048, with 2000x2000 in the center being data with white borders on the edge.  
2km in 512x512, 500x500 in the center being data.

Includes almost all Target Area imagery from July 2015 - Sep 2023, and a small portion of randomly sliced imagery from full disk.  
This dataset contains roughly 1/4 - 1/3 of all available data from Himawari-8 & 9.  
Suitable for training upscale models & whatever you like.  

While only a small portion of all available data has been used, we think that this dataset has a distribution close enough to the real world.   
Also due to compute & storage limitations(generating this & the rest of AI-VIS dataset used over 1.4TB of raw bz2 archives).  

For those who asks: might consider doing GOES-R series in the future, currently we are very saturated in terms of resources.