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21 September 2007 High-resolution imaging through strong turbulence
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Abstract
Random fluctuations in the index of refraction, caused by differential heating and cooling of the atmosphere, can severely limit the quality of ground-based observations of space objects. Techniques such as adaptive optics can help compensate for the deleterious effects that turbulence has on the images by deforming the telescope mirror and thus correcting the wave-front. However, when imaging through strong turbulence such techniques may not adequately correct the wave-front. In such cases blind restoration techniques - which estimate both the atmospheric turbulence characterized by the atmospheric point-spread-function and the object that is being observed - must be used. We demonstrate high quality blind restorations of object scenes, obtained when observing through strong turbulence, by using a sequence of images obtained simultaneously at different wavelengths and prior information on the distribution of the sources of regions of low spectral power in the data.
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Douglas A. Hope, Stuart M. Jefferies, and Cindy Giebienk "High-resolution imaging through strong turbulence", Proc. SPIE 6697, Advanced Signal Processing Algorithms, Architectures, and Implementations XVII, 66970C (21 September 2007); https://doi.org/10.1117/12.734956
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