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Image transfer through cirrus clouds. I. Ray trace analysis and wave-front reconstruction.
B T Landesman1, P J Kindilien, C L Matson
1Applied Technology Associates, 1900 Randolph, SE, Albuquerque, New Mexico 87106, USA. landesma@aptec.com
Applied Optics
|March 21, 2008
Summary
A novel ray tracing technique models image transfer through cirrus clouds, considering hexagonal ice crystals. This method analyzes how cloud depth affects image quality, crucial for astronomical observations.
Area of Science:
- Atmospheric optics
- Computational physics
Background:
- Cirrus clouds significantly impact image quality in astronomical observations.
- Accurate modeling of light propagation through ice crystal clouds is essential.
Purpose of the Study:
- To develop and present a new technique for modeling image transfer through cirrus clouds.
- To analyze the modulation transfer function (MTF) for stars imaged through cirrus clouds.
Main Methods:
- Utilizes ray tracing to model beam propagation through a 3D volume of hexagonal ice crystals.
- Employs Huygens-Fresnel propagation methods for light propagation outside the cloud.
- Wavefronts are resolved into ray distributions at air-cloud interfaces for simulation.
Main Results:
- Presents simulation output from the ray trace program.
- Discusses the modulation transfer function (MTF) for stars imaged through cirrus clouds of varying depths.
Conclusions:
- The developed ray tracing technique provides a robust method for simulating image transfer through cirrus clouds.
- The study quantifies the impact of cirrus cloud depth on image quality via MTF analysis.
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