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CEILAP MULTIWAVELENGTH RAMAN LIDAR AT VILLA MARTELLI BUENOS AIRES

(Rainproof: Not yet, Remote operation: updating available in May – June 2012)

Coaxial Multiwavelength Rayleigh and Raman Tropospheric Lidar System (MWRLS) operates in the suburbs of Buenos Aires City at CEILAP (Centro de Investigaciones en Láseres y Aplicaciones). This lidar was conceived to monitor range-resolved (100 m to 13 km AGL) aerosol optical properties from the IR to the near UV spectral region in the whole troposphere. Its emission system is a 10 Hz – 600 mJ (1064 nm) solid state Nd:YAG laser (Continuum Surelite III P-IV). The fundamental laser line is doubled and tripled to obtain 532 nm and 355 nm respectively. The backscattered radiation is collected by an f/2, 1 m focal length Newtonian telescope, focused into a 1 mm diameter optical fiber to achieve a field of view of 1 mrad. The detection unit is a dichroic/interference filter-based polychromator unit that separates the elastic and Raman-shifted backscattered radiation. The detection units are photomultiplier modules (Hamamatsu H6780-03) for the ultraviolet and visible wavelengths and a detector module (LICEL) based on an NIR enhanced Si-avalanche photodiode set (EG&G) for the infrared wavelength.

Rayleigh detection: 1064, 532 and 355 nm Raman detection: 607, 408 and 387 nm (nocturnal measurement only)