Fig. 4
From: Development and in-flight calibration of IR2: 2-μm camera onboard Japan’s Venus orbiter, Akatsuki
Limb-darkening curves at 2.02 μm: Sensitivity of cloud-top altimetry in the 2.02-μm filter is demonstrated. Three model curves with the reflecting surface (RS) at 68, 70, and 72 km altitudes are shown. Also shown with dashed line is the 70-km RS model but with aerosols (\(\tau = 5\)) uniformly mixed in the 70–72 km layer. This shows the effectiveness of limb-darkening analysis to infer the cloud-top structures