Accession Number : AD0776054

Title :   Evaluation of the Lidar Technique of Determining Slant Range Visibility for Aircraft Landings Operations.

Descriptive Note : Final rept. (Part 2), 1 Nov 72-1 Aug 73,


Personal Author(s) : Viezee,William ; Oblanas,John ; Collis,Ronald T. H.

Report Date : NOV 1973

Pagination or Media Count : 138

Abstract : The report presents and interprets the data from an experiment specifically designed to more precisely evaluate the lidar technique of measuring slant-range visibility. The evaluation experiment was conducted at Travis AFB, California, in January 1973. The primary instruments were a pulsed ruby lidar and four transmissometers installed on towers and aligned along horizontal and slant paths. Also, arrays of three passive reflectors or targets (two wire-mesh and one solid) were used to provide a measure of attenuation over the distance between targets by comparing the intensity of the target-reflected lidar signals. Single-ended lidar backscatter measurements were made alongside the transmissometer. Daytime visual range was computed from the lidar observations by the slope method. (Modified author abstract)

Descriptors :   *Aircraft landings, *Slant range, Visibility, Optical radar, Instrument landings, Data processing

Subject Categories : Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE