Venus Observations at 40 and 90 GHz with CLASS

Abstract

Using the Cosmology Large Angular Scale Surveyor, we measure the disk-averaged absolute Venus brightness temperature to be 432.3 $\pm$ 2.8 K and 355.6 $\pm$ 1.3 K in the Q and W frequency bands centered at 38.8 and 93.7 GHz, respectively. At both frequency bands, these are the most precise measurements to date. Furthermore, we observe no phase dependence of the measured temperature in either band. Our measurements are consistent with a CO${}_2$-dominant atmospheric model that includes trace amounts of additional absorbers like SO${}_2$ and H${}_2$SO${}_4$.

arXiv comment7 pages, 3 figures, published in PSJ

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Cited by in corpus (5)

• QUIJOTE scientific results -- IV. A northern sky survey in intensity and polarization at 10-20GHz with the Multi-Frequency Instrument
• Four-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: On-sky Receiver Performance at 40, 90, 150, and 220 GHz Frequency Bands
• Calibration of Transition-edge Sensor (TES) Bolometer Arrays with Application to CLASS
• Cosmology Large Angular Scale Surveyor (CLASS): 90 GHz Telescope Pointing, Beam Profile, Window Function, and Polarization Performance
• Microwave Observations of Venus with CLASS