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Fig. 8 | Earth, Planets and Space

Fig. 8

From: Venus looks different from day to night across wavelengths: morphology from Akatsuki multispectral images

Fig. 8

A sample of full-disk dayside 2.02-µm images from the IR2 camera. The calibrated versions are shown in the left column and contrast filtered versions are shown in the right column to bring out the very low-contrast details present in the data. At this wavelength, the absorption due to CO2 is noticeable at polar latitudes where the cloud tops are lower, resulting in lower brightness values. Although the observed cloud features are believed to be at the same altitude range as those seen at 283, 365 and 900 nm, different morphologies are seen. For example, the image shown in c shows a bright band, which is more noticeable in the filtered version (d), much like the “belt” seen on Jupiter, but is not visible at the shorter wavelengths. The contrast filtered versions and normalized version of the images also show features not seen in the shorter wavelengths. The cause of these differences has not yet been explored

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