Date of Award

12-1992

Document Type

Thesis

Degree Name

Master of Science in Electrical Engineering

Department

Department of Electrical and Computer Engineering

First Advisor

Byron M. Welsh, PhD

Abstract

This thesis examines a remote sensing technique for measuring the atmospheric structure constant and the transverse atmospheric wind velocity as a function of altitude by performing temporal and spatial correlations of band pass filtered wave front slope sensor measurements. Two point sources are used to illuminate two pairs-of cc>-located wave front slope sensors. The sources and sensors are arranged to give rise to crossed optical paths. For each pair of wave front slope sensors, the output of the larger sensor is subtracted from the output of the smaller sensor. This band pass filters the smaller sensor's output. The filtered outputs are then correlated. The spatial correlation is related to the structure constant by an integral containing a path weighting function. The path weighting function is sharply peaked at the intersection altitude and decays rapidly to zero. The temporal correlation is related to the wind velocity through an integral containing a wind path weighting function which is sharply peaked at the intersection altitude and decays rapidly to zero. The vertical resolution of each path weighting function is calculated. Also, signal-to-noise ratios are calculated using generally accepted models for the structure constant and atmospheric wind profiles.

AFIT Designator

AFIT-GE-ENG-92D-22

DTIC Accession Number

ADA258855

Comments

The author's Vita page is omitted.

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