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Proceedings Paper

Remote sensing of atmospheric turbulence and transverse atmospheric winds using optical reference sources
Author(s): Steven C. Koeffler; Byron M. Welsh
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Paper Abstract

In the theory of atmospheric turbulence, the strength of the spatial variations of the index of refraction n is proportional to a parameter known as the atmospheric structure constant, denoted Cn2, which is a function of position along the optical path z. The strength of the temporal variations of the index of refraction is directly related to the transverse velocity YLDV of the turbulence along z. Current optical techniques for remotely sensing Cn2 and YLDV rely primarily upon the spatial or temporal cross-correlation properties of the intensity of the optical field. In the technique proposed here, we exploit the correlation properties of the wave front slope measured from two different point sources in order to obtain vertical profiles of Cn2(z) and YLDV(z). Resolution on the order of 100 meters is possible with reference sources separated by 0.2 degrees. Additionally, signal-to-noise ratio (SNR) calculations for a single measurement of Cn2 and YLDV are presented for a Hufnagel-Valley Cn2 profile and a Bufton wind profile. The SNR results indicate the need for multiple measurements to obtain useful estimates of the desired quantities.

Paper Details

Date Published: 15 September 1993
PDF: 9 pages
Proc. SPIE 1968, Atmospheric Propagation and Remote Sensing II, (15 September 1993); doi: 10.1117/12.154826
Show Author Affiliations
Steven C. Koeffler, Air Force Institute of Technology (United States)
Byron M. Welsh, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 1968:
Atmospheric Propagation and Remote Sensing II
Anton Kohnle; Walter B. Miller, Editor(s)

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