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Microwave observations of Venus with CLASS
Dr. Bustos-Placencia, Ricardo 
Facultad de Ingeniería 
Dahal, Sumit
Brewer, Michael
Akins, Alex
Appel, John
Bennett, Charles
Cleary, Joseph
Couto, Jullianna
Datta, Rahul
Eimer, Joseph
10.3847/PSJ/acee76
IOP Publishing
2023
We report on the disk-averaged absolute brightness temperatures of Venus measured at four microwave frequency bands with the Cosmology Large Angular Scale Surveyor. We measure temperatures of 432.3 ± 2.8, 355.6 ± 1.3, 317.9 ± 1.7, and 294.7 ± 1.9 K for frequency bands centered at 38.8, 93.7, 147.9, and 217.5 GHz, respectively. We do not observe any dependence of the measured brightness temperatures on solar illumination for all four frequency bands. A joint analysis of our measurements with lower-frequency Very Large Array observations suggests relatively warmer (∼7 K higher) mean atmospheric temperatures and lower abundances of microwave continuum absorbers than those inferred from prior radio occultation measurements.
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Venus (1763)
Brightness temperature (182)
Atmospheric composition (2120)
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