From Event: SPIE Optical Engineering + Applications, 2017
Shadow imaging is a technique to obtain highly resolved silhouettes of resident space objects (RSOs) which would otherwise be unattainable using conventional terrestrial based imaging approaches. This is done by post processing the measured irradiance pattern (shadow) cast onto the Earth as the RSO occults a star. The research presented here focuses on recent developments in shadow imaging of geosynchronous (GEO) satellites with near stationary orbits approximately 36,000 km from the Earth. The fundamental resolution limits of shadow imaging are quantified analytically as a function of spectral bin width of the collected light. A set of simulated imagery is shown to agree with analytically derived resolution limits.
Dennis M. Douglas, Bobby R. Hunt, and David G. Sheppard, "Resolution limits for shadow imaging of geosynchronous satellites: analytic and simulated approaches," Proc. SPIE 10410, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017, 104100O (Presented at SPIE Optical Engineering + Applications: August 10, 2017; Published: 6 September 2017); https://doi.org/10.1117/12.2274837.
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