Accession Number : ADA111837

Title :   Feasibility of Balloon-Borne Optical Measurement of (C sub n) Squared.

Descriptive Note : Final rept. 26 Mar-26 Sep 81,

Corporate Author : PHOTOMETRICS INC WOBURN MA

Personal Author(s) : Trowbridge,C A ; Davidson,G

PDF Url : ADA111837

Report Date : 26 Oct 1981

Pagination or Media Count : 29

Abstract : Investigation of an in situ method for determining altitude profiles of the optical index of refraction structure constant by balloon-borne direct optical measurement is described. Laser beam wander versus time may be determined with great precision utilizing a position sensing photodetector and the optical index of refraction structure constant derived from these measurements. The instrument configuration, components, weight, power and telemetry requirements, and probable measurement sensitivity as a function of operational altitude range and duration of flight are considered.

Descriptors :   *REFRACTIVE INDEX, *AIR, BALLOONSONDES, ATMOSPHERIC SOUNDING, PHOTODETECTORS, LASER BEAMS, VARIATIONS, TURBULENCE, POWER SPECTRA, TELEMETERING DATA, SENSITIVITY, CALIBRATION

Subject Categories : Atmospheric Physics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE