Accession Number : AD0764144

Title :   Tactical Considerations of Atmospheric Effects on Laser Propagation.

Descriptive Note : Final rept. 13 Jan 67-12 Jan 68, on Phase 2,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

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

Report Date : 29 FEB 1968

Pagination or Media Count : 53

Abstract : The report describes the progress made during the second year (Phase II) of a study of atmospheric effects on laser propagation in connection with the operation of certain tactical weapon systems. Included are a detailed discussion of the fourth quarter's work and references to work previously reported in the three quarterly reports. A computer study was initiated in the fourth quarter to determine the optimum sensor depression angle and range to target as functions of the atmosphere in connection with an aircraft carrying a laser receiver. A small-volume false target (smoke, dust, etc.) was simulated and the receiver incident power levels from false and true targets as a function of the sensor depression angle and eight independent variables were calculated. Before the optimum values of depression angle and range can be determined, however, additional simulated runs are needed; these are planned during the early part of Phase III. An error analysis of the Mk VI lidar when used with the cooperative target array was completed and confirmed that lidar provides an accurate method of conducting transmission measurements. Also described is a method for injecting a calibration reference pulse into the PMT output log amplifier. (Modified author abstract)

Descriptors :   (*COHERENT RADIATION, ATMOSPHERIC MOTION), (*OPTICAL RADAR, TARGET DISCRIMINATION), LASERS, LIGHT HOMING, ATTENUATION, SCATTERING, TACTICAL WEAPONS

Subject Categories : Optical Detection and Detectors
      Infrared Detection and Detectors
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE