Accession Number : AD0767391

Title :   Preliminary Design Criteria, Performance and Limitations of an Airborne Laser Bathymetric System.

Descriptive Note : Technical rept.,

Corporate Author : SPARCOM INC ALEXANDRIA VA

Personal Author(s) : Hickman,G. D. ; Ghovanlou,A. H.

Report Date : AUG 1973

Pagination or Media Count : 56

Abstract : Many of the salient parameters have been determined which define the capability and system requirements for an airborne laser/receiver bathymetric system operating in turbid waters. Laboratory transmission/scattering measurements which had been made of a pulsed blue-green neon laser through waters of varying turbidity were used to develop an empirical model for predicting the performance of an airborne laser bathymetric system. The maximum depth measuring capability (alpha h) sub max) was determined to be approximately 15 attenuation lengths for a laser system operating at 30 kw/peak pulse from an altitude of 500 meters. The optimum scan angle of the laser transmitter was determined to be approximately 20 degrees while the scan rate for a laser pulsing at 100 pps was 0.8 seconds. Airborne and pier measurements are currently being conducted to test the validity of this empirical model. (Modified author abstract)

Descriptors :   (*OCEAN BOTTOM, DEPTH FINDING), (*OCEANOGRAPHIC EQUIPMENT, AIRBORNE), GAS LASERS, LIGHT TRANSMISSION, AIR TO UNDERWATER, UNDERWATER LIGHT, SCATTERING, PERFORMANCE(ENGINEERING)

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE