US Patent 8003928 Method for compensating a millimeter wave imaging array

A method for compensating a plurality of sensors comprises exposing each of the plurality of sensors to a scene energy from a scene, exposing each of the plurality of sensors to the scene energy from the scene and a reference signal energy, exposing each of the plurality of sensors to a uniform signal energy, exposing each of the plurality of sensors to the uniform signal energy and the reference signal energy, obtaining reference outputs during each exposure of the plurality of sensors, and determining the scene energy received by each of the plurality of sensors relative to the reference signal energy by combining the sensor and reference outputs obtained.