1. An imaging system comprising, in combination: an electro-optical imaging array arranged as a plurality of rows and columns of individual pixel elements, said array organized into a plurality of sub-arrays of rows of said pixels, each sub-array being responsive to incident radiation from a scene of interest; a multi-spectral or hyperspectral filter placed in registry with said electro-optical imaging array, said filter defining a plurality of individual filter bands, said filter bands arranged in optical registry with said sub-arrays whereby each of said sub-arrays receives radiation passing through one of said individual filter bands; a scanning device directing radiation from said scene of interest onto said imaging array, said array and scanning device constructed and arranged such that as said scene of interest is scanned over said array a given point in said scene of interest is sequentially imaged by each of said sub-arrays; and clocking circuitry for said imaging array for clocking individual pixel elements in each of said sub-arrays in a direction and at a rate to thereby improve the signal to noise ratio of imagery from said array.