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Mean winds at the cloud top of Venus obtained from two-wavelength UV imaging by Akatsuki

Imamura, Takeshi; Takagi, Masahiro; Yamazaki, Atsushi +9 more

Venus is covered with thick clouds. Ultraviolet (UV) images at 0.3–0.4 microns show detailed cloud features at the cloud-top level at about 70 km, which are created by an unknown UV-absorbing substance. Images acquired in this wavelength range have traditionally been used to measure winds at the cloud top. In this study, we report low-latitude win…

Initial products of Akatsuki 1-µm camera

Imamura, Takeshi; Ando, Hiroki; Ueno, Munetaka +25 more

The status and initial products of the 1-µm camera onboard the Akatsuki mission to Venus are presented. After the successful retrial of Venus' orbit insertion on Dec. 2015 (5 years after the failure in Dec. 2010), and after a long cruise under intense radiation, damage in the detector seems small and fortunately insignificant in the final qu…