[PPS04-P06] The global variation of Venus cloud observed by IR1 camera onboard AKATSUKI
Keywords:Venus, NearInfraRed, cloud
Near infrared (0.986 µm) dayside image of Venus has taken by solid state imaging (SSI) of the Galileo spacecraft (NASA). It appears almost flat, there are some small scale features with a contrast of 3 % [Belton et al., 1991]. In Takagi et al. (2011), it may be calculated that the source of the contrast of the order of 3 % in near infrared Venus dayside image is due to variation in the cloud optical thickness.
On December 7, 2015, AKATSUKI (JAXA) approached Venus and the Venus orbit insertion was successful. After the Venus orbit insertion, many 0.90 µm Venus dayside images were taken by the 1 µm near infrared camera (IR1) onboard AKATSUKI.
In this study, cloud optical thickness variation are investigated from 0.90 µm Venus dayside images taken by IR1 camera and radiative transfer calculation globally. Furthermore, we will examine Venus meteorological some change that contribute to cloud variation.