Abstract

ABSTRACT The Air Force Research Laboratory (AFRL) Active Remote Sensing Branch has developed the Laser Airborne RemoteSensing (LARS) system for chemical detection using the differential absorption lidar (DIAL) technique. The system is basedon a high-power CO2 laser which can use either the standard '2C'602 or the '3C1602 carbon dioxide isotopes as the lasingmedium, and has output energies of up to 5 J on the stronger laser transitions. The lidar system is mounted on a flight-qualified optical breadboard designed for installation into the AFRL Argus C-135E optical testbed aircraft. The Phase Iground tests were conducted at Kirtland AFB in 1997, prior to the LARS flight tests performed in September 1997 atKirtland AFB and the Idaho National Engineering and Environmental Laboratory (INEEL). The Phase II ground tests wereconducted in 1998 to determine the optimum performance of the LARS system, after the incorporation of modifications andimprovements suggested by the flight test results. This paper will present some of the chemical detection and radiometricresults obtained during the Phase II ground tests.Keywords: Lidar, airborne lidar, laser radar, CO2 DIAL, laser remote sensing

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