Infrared imaging of Venus - 8-14 micrometers

Details Infrared imaging of Venus - 8-14 micrometers Infrared imaging of Venus - 8-14 micrometers

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976icar...27..191d&link_type=abstract

Icarus, vol. 27, Feb. 1976, p. 191-195.

Astronomy and Astrophysics

Astronomy

4

Infrared Astronomy, Infrared Imagery, Planetary Radiation, Radiant Flux Density, Venus (Planet), Brightness Temperature, Data Processing, Limb Darkening, Planetary Surfaces

Scientific paper

High-spatial-resolution images of Venus were obtained at wavelengths between 8 and 14 microns when the planet was at a phase angle of 112 deg with the morning terminator in view. The images confirm the existence of a previously mapped flux anomaly near the south pole and show evidence of other infrared features, presumably transient in nature. Flux differences of 2-7% were measured, corresponding to brightness temperature variations of roughly 1-3 K. The images also confirm the difference between polar and equatorial limb darkening. Finally, evidence is presented for a night-day asymmetry in the flux, with the brightness temperature greater by about 2 K on the sunlit side.

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