Spectral Calibration, Spatial Mapping and Flat Fielding Studies of the Dark HORSE 1 (DH1) March Data Collection
NAVAL RESEARCH LAB WASHINGTON DC ADVANCED CONCEPTS BRANCH
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Recently researchers at the Naval Research Laboratory NRL have successfully demonstrated autonomous, real time, hyperspectral detection of airborne and military ground targets. Real-time autonomous cueing of a high-resolution imager, and designation of targets with pointing optics and a pulsed aser was also demonstrated. The work was performed under NRLs Dark HORSE effort, the culmination of a four-year Multispectral Overhead IREO Surveillance MOVIES program to develop real-time hyperspectral detection, cueing, target location, and target designation capabilities. The program will provide enabling technology for future manned, reconnaissance, and Uninhabited Combat Air Vehicle UCAV systems. The following describes the spectral calibration and flat fielding studies performed on a recently collected data set of the Dark HORSE 1 DH1 visible hyperspectral sensor. The procedures used for spectral calibration and mapping of the sensors focal plane array FPA are described and a real-time algorithm for corrective re-mapping of the image data is presented in detail. Also, procedures used for pre and post-flight flat fielding of the sensors radiometric response are described with an emphasis on the potential advantages and disadvantages of each. Results of these efforts are discussed and appropriate conclusions are drawn.
- Optical Detection and Detectors