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Proceedings Paper

Remote sensing of atmospheric wind profiles using spatio-temporal intensity information and wavefront sensor information
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Paper Abstract

Wind profiling systems are critical for next generation, free space laser communication systems and laser designation systems, which are required to operate in the presence of severe atmospheric turbulence. The precision of the received laser beam depends greatly on the accuracy of estimation of the transversal wind along the laser beam propagation path. Two types of wind profiling techniques are investigated here. One technique is based on the reconstruction of wind velocity information from spatio-temporal intensity scintillation data measured at the optical receiver telescope. For the case of multiple phase-distorting layers located at different distances, the observed intensity scintillation pattern contains intensity spots of different spatial scales. The determination of the wind velocity for each spatial scale allows reconstruction of the wind profile along the entire propagation path. The second technique is based on simultaneous real-time characterization of the transversal wind velocity along the propagation path from the output image streams of a differential nonlinear Zernike wavefront sensor. This sensor consists of an optically addressed spatial light modulator that enables high-speed, high-resolution visualization of wind flow at each distant phase-distorting layer along the propagation path. Both preliminary experimental results and numerical simulation results are shown to validate the performance of the two types of techniques.

Paper Details

Date Published: 5 November 2005
PDF: 12 pages
Proc. SPIE 5998, Sensors for Harsh Environments II, 599808 (5 November 2005); doi: 10.1117/12.637211
Show Author Affiliations
Miao Yu, Univ. of Maryland, College Park (United States)
Mikhail A. Vorontsov, Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 5998:
Sensors for Harsh Environments II
Anbo Wang, Editor(s)

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