Fig. 3From: Initial products of Akatsuki 1-μm cameraImage acquisition status for Dec. 2015–Dec. 2016. Each box represents 1 month. The vertical axis is for the number of available images, and the horizontal for the day in a month. Dayside is shown by gray and nightside by black vertical bars. A set of three nightside images are taken nearly simultaneously, and the black bar indicates total number of nightside images, so that one-third of the black bars belongs to one wavelength. The 10-day periodicity seen is due to Akatsuki’s orbital motion, and nightside images are concentrated around periapsisBack to article page