Proceedings Article | 1 May 2009
Proc. SPIE. 7312, Advanced Environmental, Chemical, and Biological Sensing Technologies VI
KEYWORDS: Transmitters, Doppler effect, Backscatter, LIDAR, Sensors, Signal attenuation, Aerosols, Calibration, Receivers, Signal detection
Optical Autocovariance Wind Lidar (OAWL) is a new direct-detection interferometric Doppler lidar approach that
inherently enables simultaneous acquisition of multiple-wavelength High Spectral Resolution Lidar calibrated aerosol
profiles (OA-HSRL). Unlike other coherent and direct detection Doppler systems, the receiver is self referencing; no
specific optical frequency lock is required between the receiver and transmitter. This property facilitates frequency-agile
modalities such as DIAL. Because UV laser wavelengths are accommodated, a single transmitter can simultaneously
support winds, Raman, fluorescence, DIAL, and HSRL receiver channels, each sampling identical spatial and temporal
volumes. LOS species flux measurements are acquired without the usual spatial and temporal sampling errors (or cost,
volume, mass, power, and logistical issues) incurred by separate lidar systems, or lidars in combination with other
remote or in-situ sensors. A proof of concept (POC) OAWL system has been built and demonstrated at Ball, and OAHSRL
POC is in progress. A robust multi-wavelength, field-widened OAWL/OA-HSRL system is under development
with planned airborne demonstration from a WB-57 in late 2010. Detailed radiometric and dynamic models have been
developed to predict performance in both airborne and space borne scenarios. OA theory, development, demonstration
status, advantages, limitations, space and airborne performance, and combined measurement synergies are discussed.
