Preliminary Infrared Radiometry of Venus from Mariner 10

Details Preliminary Infrared Radiometry of Venus from Mariner 10 Preliminary Infrared Radiometry of Venus from Mariner 10

Mar 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974sci...183.1291c&link_type=abstract

Science, Volume 183, Issue 4131, pp. 1291-1292

Computer Science

5

Scientific paper

The intensity of emission at 45 micrometers, measured with high spatial resolution along a single crossing of the Venus disk, is presented. On the average, the observed darkening toward the limb varies nearly linearly with the cosine of the emission angle. The brightness temperature, extrapolated to normal emission, is 255 degrees K. The limb darkening curve, interpreted in a linear approximation, implies that the atmosphere is quite opaque, with an absorption coefficient of 0.24 per kilometer. Changes in curvature present in the limb darkening curve suggest the existence of thermal inhomogeneities with scale comparable to that of the dark markings shown by ultraviolet images.

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