Abstract

Optically-based velocimetry techniques have the potential to provide critical data for the maneuverability and control of supersonic/hypersonic aircraft under conditions where conventional sensors are unreliable. For example, at high speed, the calibration of pitot-pressure devices is uncertain. Recently, High Spectral Resolution Lidar (HSRL) incorporating a barium atomic vapor filter has been used to determine atmospheric temperature and backscatter ratio (1). In this paper, we present a concept for an air-born Optical Air Data System (OADS) based on a Doppler-shifted HSRL approach which we have termed Spectrally Filtered Rayleigh Scattering (FRS) (2).

© 1993 Optical Society of America