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Updated: Jul 11, 2026

Biomolecular Detection employing the Interferometric Reflectance Imaging Sensor (IRIS)
Published on: May 3, 2011
First results from the large probe infrared radiometer experiment
Abstract:
During the descent to the surface of Venus, the large probe infrared radiometer measured the net thermal radiative flux in several spectral bandpasses. Preliminary analysis has permitted us to estimate (i) the infrared extinction coefficient profile attributable to aerosols, with respect to their visible profile, in the upper atmosphere of Venus and (ii) the water vapor mixing ratio below the clouds. An indication of the composition of a multicomponent cloud is seen in the data from the spectral bandpass from 6 to 7 micrometers.
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