A system and method for providing an apparatus for detecting radiance at a plurality of wavelengths is disclosed. The system and method includes an arrayed pixel sensor with a plurality of sub-pixel sections including a first sub-pixel section configured to detect radiance received from a radiating body at a first wavelength and a second sub-pixel section configured to detect radiance received from the radiating body at a second wavelength. The system and method also determines a ratio of the radiance detected at the first wavelength and the radiance detected at the second wavelength to determine a temperature of the radiating body based on the ratio.