Laser air data system using enhanced-mode lidar

Gary E. Halama; Clinton Meneely; James Jamieson

doi:10.1117/12.519189

21 August 2003 Laser air data system using enhanced-mode lidar

Gary E. Halama, Clinton Meneely, James Jamieson

Proceedings Volume 5086, Laser Radar Technology and Applications VIII; (2003) https://doi.org/10.1117/12.519189
Event: AeroSense 2003, 2003, Orlando, Florida, United States

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.

Citation Download Citation

Gary E. Halama, Clinton Meneely, and James Jamieson "Laser air data system using enhanced-mode lidar", Proc. SPIE 5086, Laser Radar Technology and Applications VIII, (21 August 2003); https://doi.org/10.1117/12.519189

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