Abstract: The present invention relates to a method of generating intensity measurement correction coefficients for a pixel in a focal plane array of an optical sensor, wherein the correction coefficients are used to correct an intensity measurement generated by the pixel responsive to illumination. The method includes the steps of accessing past values of the correction coefficients, receiving a pixel intensity measurement indicative of illumination characterized by a reference energy density function, generating a modeled noise signal, and generating present values of the correction coefficients. The present values of the correction coefficients are generated based on the past values of the correction coefficients, the pixel intensity measurement, the modeled noise signal, and the reference energy density function.

Abstract: A remote non-contacting vehicle load and emissions compliance monitoring system includes a remote vehicle velocity detector, a remote emissions temperature sensor, a remote emissions content monitor, and a processing and computing unit connected to receive data from the sensors and compute the vehicle load based on the vehicle velocity and emissions temperature, as well as on road and environmental conditions and stored vehicle operating specifications, and to compare the observed exhaust plume content with a model emissions profile based on the computed load and vehicle characteristics.