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Proceedings Paper

Laser air data system using enhanced-mode lidar
Author(s): Gary E. Halama; Clinton Meneely; James Jamieson
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Paper Abstract

This paper reports the test results for a three-axis true airspeed measurement instrument that is based on the enhanced mode lidar (EML) concept. This instrument is a continuing Goodrich development effort that builds on the single-axis homodyne concept. Our system heterodynes a reference signal with the single particle lidar return from naturally occurring atmospheric aerosols. The reference signal's frequency is shifted by an acousto-optic modulator, thereby, enabling the measurement of the positive and negative Doppler frequencies. A scan head using a wedge to direct the beam at a 15-degree angle is rotated about the original line of site to trace a cone shape. The redirected beam plus the heterodyning enables the measurement of three-axis true airspeed. The instrument was evaluated using wind tunnel measurements and the results are reported.

Paper Details

Date Published: 21 August 2003
PDF: 8 pages
Proc. SPIE 5086, Laser Radar Technology and Applications VIII, (21 August 2003); doi: 10.1117/12.519189
Show Author Affiliations
Gary E. Halama, Goodrich Corp. (United States)
Clinton Meneely, Goodrich Corp. (United States)
James Jamieson, Goodrich Corp. (United States)

Published in SPIE Proceedings Vol. 5086:
Laser Radar Technology and Applications VIII
Gary W. Kamerman, Editor(s)

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