By applying nonlinear modeling to multiband radiometric data, one can mathematically extract radiation characteristics of certain classes of optically unresolvable sources. This paper considers sources whose signatures are composed of blackbody, graybody, and known non-Planckian radiation. Algorithm sensitivity in the presence of white noise has been investigated using Monte Carlo techniques and is also presented. The paper also develops the theoretical basis and implementation of the method and demonstrates the ability of the algorithm to determine the number of graybodies in an unresolved source.
R. D. Tippets,
D. M. Wilcox,
"A Method For The Resolution Of Multiple Graybodies From Spectrally Sampled Optical Systems," Optical Engineering 18(3), 183313 (1 June 1979). https://doi.org/10.1117/12.7972373