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. Author manuscript; available in PMC: 2022 Jan 12.
Published in final edited form as: Space Sci Rev. 2020 Oct 26;216:122. doi: 10.1007/s11214-020-00751-1

Fig. 9.

Fig. 9

Cylindrical projection of Saturn’s thermal emission at 2.2 cm wavelength, obtained by the Cassini RADAR in passive (non-transmitting) mode. The dark band at the equator is due to the rings, which are colder than the planet itself. The top two panels show the planet before the great storm. The lower panel shows warm emission at the location of the storm. Ammonia is the principal absorber at 2.2 cm wavelength, so the warm emission is due to ammonia depletion allowing radiation from deeper levels to reach the detector (Janssen et al. 2013)