Spectral radiance of solar energy varies with location due the spatial variation in atmospheric parameters. In this work, the spatial distribution of spectral radiance of Mubi metropolis was mapped using Landsat Enhanced Thematic Mapper (Landsat 7 ETM+) satellite images. Four images correspond to the four seasons of the year were acquired and used for the study. The Pixel Digital Number (DN) of band 6.2 (thermal band) for the four images were converted to spectral radiance (in W/m2/sr/µm) using the bias and gain values of the images. A maximum spectral radiance of about 13.20 Wm-2sr-1 μm was recorded during Summer Solstice with a mean value of 11.00 Wm-2sr-1 μm while highest mean value 11
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