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Unimixing and mapping of alteration zones using EO-1 Hyperion data in Erongo, Namibia

The study aims to detect and map alteration halos in Erongo Namibia using Hyperion dataset. Detail surveys and investigations are possible considering hyperspectral sensors capability to render plenty of spectral information from observing surface of earth. In the term of mineral detection there are particular challenges. Main problem is due to very small size of mineral grain comparing to even those data possessing finest ground resolution. One of the methods has been invented for objects smaller than ground resolution of dataset is linear mixture model (LMM). This allows us to estimate abundances of targets in each pixel of scene after determination of endmembers. Regarding to the challenge about mineral detection task, as a matter of fact, finding pure pixels of the data in mineralogical scale is often impossible. Therefore we are able to determine the purest pixels which are a mixture of several minerals themselves and spectral profile of them consists of absorption features of those detectable minerals.