Accession Number : AD0743849

Title :   Laser Beam Behavior on a Long High Path.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND WHITE SANDS MISSILE RANGE N MEX ATMOSPHERIC SCIENCES LAB

Personal Author(s) : Mason,J. B. ; Lindberg,J. D.

Report Date : APR 1972

Pagination or Media Count : 20

Abstract : Observations of the atmospheric effects on a laser beam over a unique path are discussed. The path is 80 km long and 1.3 km above the surface. Correlations are discussed between temperature lapse rate at the path level and the spreading and deflection of the beam. Beam deflection and beam spread are found to be generally consistent with result obtained by others over lower and shorter paths. Diurnal movements of the beam are not nearly as noticeable, and on one occasion a remarkable degree of collimation occurred which lasted for several hours. It is concluded that such observations could be used for monitoring lapse rate. (Author)

Descriptors :   (*COHERENT RADIATION, SCINTILLATION), (*LIGHT TRANSMISSION, ATMOSPHERES), GAS LASERS, PROPAGATION, ATMOSPHERIC TEMPERATURE, REFRACTIVE INDEX, TURBULENCE

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE