RadioBEAR (Radio BErkeley Atmospheric Radiative-transfer) calculates the brightness temperature of planetary atmospheres in the meter-to-millimeter wavelength range. The code assumes the atmosphere is in local thermodynamic equilibrium; it can calculate the RT-derived brightness temperatures of a planet on each location on the planet and create 2D model maps of the planet's disk.
https://ui.adsabs.harvard.edu/abs/2014Icar..237..211D , https://ui.adsabs.harvard.edu/abs/2019Icar..322..168D