STUDY ON MITIGATION OF TURBULENCE EFFECTS FOR IMAGERY IN THE ATMOSPHERIC BOUNDARY LAYER

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Authors
  1. Aitken, G.J.M.
  2. Rossille, D.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN);Queen's Univ, Kingston ONT (CAN) Dept of Electrical and Computer Engineering
Abstract
Post-detection image restoration and adaptive optics have been examined as techniques to improve imaging along horizontal and slant paths in the atmospheric boundary layer. Phase diversity appears to be a good candidate for both post-processing and as a wavefront sensor in adaptive optics. A major problem for any mode of image compensation is the small size of the isoplanatic angle at low altitudes. Current theory suggests that image improvement may be limited to less than 1 km near the ground, but at altitudes of 10-20 km may be possible to approximately 10 km. Measurements are needed to more accurately determine the atmosphere's isoplanatic and coherence properties at low altitudes so that performance of image-compensation systems can be predicted.
Keywords
Adaptive optics;Atmospheric optics;Anisoplanatic;Horizontal path;Slant path;Image quality
Report Number
DREV-CR-931 — Contractor Report
Date of publication
27 Mar 1996
Number of Pages
105
DSTKIM No
97-03765
CANDIS No
503807
Format(s):
Hardcopy;Document Image stored on Optical Disk

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