Aerosol extinction profiles are measured using lidar backscatter. The lidar utilizes a frequency doubled output from a flashlamp pumped Q-switched Nd:YAG laser for the laser transmitter. The laser output has 100 mJ pulses with a pulse duration of 9.9 ns and a pulse repetition frequency of 20 Hz. A 28 cm diameter Schmidt-Cassegrain telescope and a gated photomultiplier tube (PMT) yield a full-angle field-of-view of 2 mrad, allowing for aerosol extinction retrievals up to 20 km with 0.75 m vertical range resolution set by a 14 bit 200 MHz two channel digital (A/D) data logger.
Updated: June 3, 2013 17:14