A modified X-band radar system designed to detect aircraft during atmospheric lidar operations is described and characterized. The capability of the radar to identify aircraft approaching from a variety of directions was tested, and first detections were found to occur between the −10 and −3 dB perimeters of the gain horn’s antenna pattern. A model based on the radar equation projects the performance of the radar for different sizes of aircraft and at different altitude levels. Risk analysis indicates that the probability of accidently illuminating an aircraft with the laser beam during joint lidar–radar operations is low.
© 2005 Optical Society of America
Original Manuscript: September 13, 2004
Revised Manuscript: February 21, 2005
Manuscript Accepted: March 2, 2005
Published: August 10, 2005
Thomas J. Duck, Bernard Firanski, Frank D. Lind, and Dwight Sipler, "Aircraft-protection radar for use with atmospheric lidars," Appl. Opt. 44, 4937-4945 (2005)