Ground-Based Ultraviolet Differential Absorption Lidar (DIAL) System and Measurements

Techniques for laser remote sensing of the environment

“…The plant is located 3 km to the right of the system. Units are parts per billion (Hawley et al, 1983).…”

“…In Figure 13 a PPI display of SO 2 concentration is shown, observed by the mobile DIAL system of SRI in the vicinity of a power plant (Hawley et al, 1983). A pair of frequency doubled Nd:YAG pumped dye lasers was used and the two UV beams were transmitted within 100 us; this interval was selected to be shorter than the mean atmospheric fluctuation period of about 1 ms.…”

A Survey of Laser and Selected Optical Systems for Remote Measurement of Pollutant Gas Concentrations

“…These include ground mobile systems developed at SRI International, 20 an airborne system in Sweden, 21 developed by NASA Langley Research Center, 22 - 23 and a fixed, ground based system in France. 24 These systems have helped considerably to demonstrate the usefulness of lidar systems for the remote sensing of atmospheric pollutant gases.…”

“…The system developed by SRI International under contract with the Electric Power Research Institute (EPRI) 20 uses a pair of NdrYAG-pumped dye lasers. The system also includes a steerable transmit/receive mirror, a receiving telescope, and a minicomputer for data storage and processing, all mounted in a large truck trailer.…”