Accession Number : AD0773654

Title :   An Empirical Study of Light Path Behavior, and Application of the Findings to the Design of Precise Surveying Systems for Dam Alignment.

Descriptive Note : Final rept.

Corporate Author : TOWILL INC SAN FRANCISCO CALIF

Report Date : DEC 1973

Pagination or Media Count : 67

Abstract : Two locations were studied--one in California at the Stanford Linear Accelerator site and one at Table Rock Dam on the White River in Missouri--to gain an understanding of the forces and influences that act on a precise surveying system, to attempt to identify the cause of detrimental influences, and to investigate the feasibility of minimizing these influences in practical applications. Light path behavior was studied. The effects of temperature, pressure, humidity, wind, and fog on light paths were determined. The effects of elevation on survey lines, length of line, and laser output were also studied. (Modified author abstract)

Descriptors :   *Surveying(Geographic), *Instrumentation, *Optical equipment, Lasers, Light transmission, Atmospheric disturbances, Dams

Subject Categories : Cartography and Aerial Photography
      Civil Engineering
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE