It looks like they take 4 exposures in quick succession: 3 chroma exposures (blue, green, red), and then luminance. This is just an artifact of seeing the plan

It looks like they take 4 exposures in quick succession: 3 chroma exposures (blue, green, red), and then luminance. This is just an artifact of seeing the plane move between the 4 exposures (and then trying to composite it back into one image)