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Proceedings Paper

Real-time wind speed measurement using wavefront sensor data
Author(s): M. B. Roopashree; Vyas Akondi; Raghavendra Prasad Budihala
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Paper Abstract

Real-time measurement of effective wind speed helps in continuous monitoring of the temporal bandwidth in adaptive optics systems. In this paper, we propose a simple and efficient method for estimating wind speed from wavefront sensor data. A small portion from the center of a wavefront arriving at time 't' is mapped at all possible positions on phase screens coming later than 't' by a time n × Δtint (Δtint-integration time, n-integer) to form correlation maps. Wind speed and direction is estimated statistically via the calculation of the vectors formed by joining the central portion and the position of maximum correlation on the correlation maps. Number of such realizations to be considered to arrive at an accurate estimate of wind speed was optimized to reduce computing time and increase accuracy.

Paper Details

Date Published: 26 February 2010
PDF: 12 pages
Proc. SPIE 7588, Atmospheric and Oceanic Propagation of Electromagnetic Waves IV, 75880A (26 February 2010); doi: 10.1117/12.841333
Show Author Affiliations
M. B. Roopashree, Indian Institute of Astrophysics (India)
Vyas Akondi, Indian Institute of Astrophysics (India)
Indian Institute of Science (India)
Raghavendra Prasad Budihala, Indian Institute of Astrophysics (India)

Published in SPIE Proceedings Vol. 7588:
Atmospheric and Oceanic Propagation of Electromagnetic Waves IV
Olga Korotkova, Editor(s)

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