Title: OAWL Sound Bites: FIDDL and HOAWL
Presenting Author: Sara Tucker
Organization: Ball Aerospace
Co-Author(s): Thomas P. Delker and Carl S. Weimer

Abstract:
The Optical Autocovariance Wind Lidar (OAWL), developed by Ball Aerospace demonstrated wind measurements in both ground and airborne testing. However, the original interferometer receiver was designed to be part of a more comprehensive approach to atmospheric measurements we refer to as the Integrated Direct Detection (IDD) system. By operating at 355 nm, OAWL may be paired with a molecular backscatter double-edge channel currently being developed under the ESTO-funded Advanced Component Technology (ACT): Fabry-perot for the Integrated Direct Detection Lidar (FIDDL). FIDDL implements a Fabry-Perot etalon in a modified Double-Edge technique that will use the molecular-broadened wings of the lidar return spectrum to estimate wind speeds in low-aerosol-loading atmospheric conditions. Under the concurrent HSRL-OAWL (HOAWL) ACT, the system was upgraded to operate and measure winds from the ground at both the 355 nm and 532 nm wavelengths. In addition, algorithms were developed to retrieve aerosol properties data from the lidar returns. We will present the basic system designs and development status of the FIDDL and HOAWL ACTs (now in year 3), as well as how these ACT's fit in with the larger overall picture for OAWL.