Design of a new DIAL system for tropospheric and lower stratospheric ozone monitoring in Northern Greece
Papayannis, J. Porteneuve, D. Balis, C. Zerefos and E. Galani
[περίληψη] An improved ozone Differential Absorption Lidar (DIAL) system has been designed for tropospheric and lower stratospheric ozone monitoring in Northern Greece. The system is based on a frequency quadrupled pulsed Nd:YAG laser and the Raman shifting technique in D-2 and H-2 gases. The lidar system emits simultaneously 4 wavelengths (266 nm, 289 nm, 299 nm and 316 nm) at 10 Hz repetition rate using a single low pressure Raman cell. The optical receiving system is based on a 50 cm concave telescope which is directly coupled to a specially conceived grating spectrometer. This lidar system uses analog (12 bits-40 MHz) and photon counting (250 MHz) detection systems, able to measure lidar signals up 16 km height. Ozone vertical profiles are to be measured from 0.8 km up to 15 km height, with a 30-500 m spatial and a 1-minute temporal resolution. In this paper the major technical characteristics of the improved lidar system are presented. The system is foreseen to provide the first daytime/nighttime ozone vertical profiles during early winter 1999.
[keywords] Tropospheric, stratospheric ozone
Physics and Chemistry of the Earth, 24,5, 439-442, 1999
English version
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