Laser transmission through simulated cirrus clouds Author(s): Ila L. Kolb; William . Cheng; William Cotton. Cirrus clouds regularly cover approximately 20% of the globe 1. Understanding laser and other electo-optical transmission in the presence of cirrus clouds is an important consideration for astronomical observations, various lidar systems, and new laser systems like the USAF Airborne Laser
Laser transmisison through simulated cirrus clouds by one-layer and multiple layer propagation models. Ila Kolb, William Cheng, William Cotton. Published: 11 June 2001. by American Institute of Aeronautics and Astronautics. in 32nd AIAA Plasmadynamics and Lasers Conference. 32nd AIAA Plasmadynamics and Lasers Conference ; doi:10.
Cirrus clouds regularly cover approximately 20% of the globe 1. Understanding laser and other electo-optical transmission in the presence of cirrus clouds is an important consideration for astronomical observations, various lidar systems, and new laser systems like the USAF Airborne Laser. Simulated cirrus cloud data generated by the Regional Atmospheric Modeling System (RAMS) is used as input to a laser propagation code developed at University of California at Los Angeles (UCLA). This code computes realistic laser transmission values through a 1-D cirrus cloud layer
We show some examples of real and simulated return signals of airborne and space-based LIDARs. For a space-based LIDAR even for subvisible cirrus clouds the contribution from multiple scattering is substantial, for water clouds it is absolutely dominant. For an airborne LIDAR multiple scattering is much less important. The simulations have been done using variance reduction Monte Carlo methods allowing for controlling the variance.
A near-infrared laser transmission model involving thin cirrus clouds has been developed for an aircraft– target system, primarily for tactical applications. Transmission produced by multiple scattering is. Fig.
Laser ttering through inhomogeneous cirrus clouds. Appl Opt 2002 Sep;41(27):5744-54. An IR transmission model for thin and subvisual cirrus clouds composed of hexagonal ice crystals with a specific use for target detection has been developed. To facilitate the scattering and absorption calculations for hexagonal column and plate crystals in connection with transmission calculations, we have developed parameterized equations for their single scattering properties by using the results computed from a geometric ray-tracing program.
Kolb, Ila Laser Transmission Through Simulated Cirrus Clouds Advisor: Cotton. Loechl, Erica Intraseasonal Oscillations and the Southeast Asian Monsoon Onset Advisor: Johnson. McLeod, Raymond Analysis of the 1998 Southeast Asian Monsoon and the Diurnal Cycle in the South China Sea Advisor: Johnson. Schrumpf, Bradford D. Identification of Potential Aircraft Icing Regions Through Multispectral Analysis of GOES-8 Imagery Advisor: Schubert. Stepaniak, David P. An Initial Value Problem Study of Free Waves on a Barotropic Vortex Advisor: Schubert. Stocker, Roger A. Numerical Examination of Long-Range Dispersion using RAMS with a Climatological Analysis for the MOHAVE Field Study Advisor: Pielke.
The possibility of horizontal orientation of ice crystals can enhance transmission of laser beams in the aircraft-target geometry. Transmitted energy is strongly dependent on the horizontal distance between the aircraft and the target and on the cloud optical depth.
Infrared transmission through cirrus clouds: A radiative model for target detection. Liou, K. Y. Takano, S. C. Ou, A. J. Heymsfield, and W. Kreiss, 1990: Infrared transmission through cirrus clouds: A radiative model for target detection. Applied Optics, 29, 1886-1896, doi:10. Times Viewed on OpenSky: 42 Times Downloaded on OpenSky: 0.