Carrano, C. J. | Engineering Papers

DOE OSTI2013

Bispectral Speckle Imaging Algorithm Performance on Specific Simulated Scenarios

The purpose of this report is to describe the anticipated performance of LLNL’s bispectral speckle imaging algorithm on specific imaging scenarios and further evaluate the regime over which bispectral speckle imaging can be used to compensate for atmospheric turbulence. This includes investigating a number of relevant Cn2 cases and multiple wavelengths. The anticipated performance described here will be evaluated based upon simulated imagery. As with any simulation, it must be realized that the full truth of the matter will be determined when real data is analyzed. This report assumes some basic familiarity with bispectral speckle imaging.

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DOE OSTI2013

Optical system case studies

The purpose of this document is to detail the effect of various optical and camera system parameters for two different classes of surveillance imaging scenarios. We will take into account the effects of expected atmospheric turbulence and demonstrate where image enhancement techniques such as speckle imaging[1] can help. In the scenarios considered here, primary factors that determine the limiting resolutions are the range to target, wavelength, focal length, camera pixel size, and aperture size. Depending on the weather, imaging geometry, and the nature of the terrain below the imaging path, the atmospheric effects will vary. For the first scenario, we are interested in studying system parameters for imaging over shorter ranges from 2 to 8 km from very low slant angles over land or water. For the second scenario, we are interested in studying system parameters for imaging from 10 km to 60 km from low slant angles over land.

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