 The Invariant Algorithm for target detection was designed to find many possible combinations of these conditions for the image.Multiple organizations, with several reference sensors, are collecting libraries of hyperspectral signatures, starting with undisturbed areas such as deserts, forests, cities, etc.built by Hughes Danbury Optical Systems and flight tested on a Convair 580.
 a day/night, long range reconnaissance imaging testbed composed of a hyperspectral sensor system with integrated high resolution imaging

Under the HYMSMO program, there have been a number of studies to build hyperspectral imaging signatures in various kinds of terrain.