Accession Number : AD0855313

Title :   Tactical Considerations of Atmospheric Effects on Laser Propagation.

Descriptive Note : Final rept. 13 Jan 68-28 Apr 69 on Phase 3,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s) : Allen, Robert J. ; Uthe, Edward E.

Report Date : APR 1969

Pagination or Media Count : 119

Abstract : The pertinent findings of a three-year study of the effects of the atmosphere on laser propagation are presented, primarily in connection with the Remote Target Designator and Target Illumination System. In addition to data in support of the basic design of tactical weapon systems, this study has also produced information concerning available methods and techniques with which to determine the probability of completing a mission successfully by inferring atmospheric transmission properties at the 1.06-micrometer laser wavelength from on-the-spot observations. It is shown that this is best implemented by adding lidar (laser radar) capabilities to the target designator/illuminator. This addition would also permit atmospheric transmission to be determined at night, would eliminate human error and the need for specialized training, and would provide a more precise determination of atmospheric transmission in space and time coordinates. The nature of Mie scattering as investigated using Fourier techniques is reported. These studies have provided a better insight into how atmospheric scattering properties can be generally described if it is shown that empirical backscatter-extinction relations may exist for highly absorbing Mie particles, of for non-Mie particles regardless of the particle-size distribution. (Author)

Descriptors :   (*OPTICAL RADAR, LASERS), (*LASERS, LIGHT TRANSMISSION), (*LIGHT TRANSMISSION, ATMOSPHERES), (*OPTICAL TARGET DESIGNATORS, LASERS), ILLUMINATION, INFRARED RADIATION, VISIBILITY, SCATTERING, METEOROLOGICAL PHENOMENA.

Subject Categories : Lasers and Masers
      Optical Detection and Detectors
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE