DocumentCode :
3598106
Title :
Scanning Raman lidar to measure atmospheric water vapor and aerosols
Author :
Whiteman, D. ; Melfi, S.H. ; Ferrare, R. ; Evans, K.
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt, MD, USA
Volume :
2
fYear :
34881
Firstpage :
1389
Abstract :
Raman lidar is an effective tool for measuring the vertical and temporal evolution of atmospheric water vapor and aerosols. The NASA/GSFC Scanning Raman Lidar (SRL) has participated in several coordinated field campaigns since its first operation in 1991. The measurement capabilities of the SRC are discussed and representative data are presented. This lidar is based on a XeF excimer laser with an output wavelength of 351 nm. The pulsed laser beam is directed into the atmosphere using laser-hardened dichroic mirrors. The signals backscattered from the atmosphere are gathered by a 0.76 m diameter telescope and detected using photomultiplier tubes. A photon counting data acquisition system operating at 100 MHz records the return signals. Four return signals are measured: the backscatter at the laser wavelength due to Rayleigh and Mie scattering from molecules and particles and the Raman shifted returns due to molecular water vapor, nitrogen and oxygen. The system includes a large 1.1 m×0.8 m scan mirror which allows the full aperture of the telescope to be scanned from horizon to horizon in a single scan plane
Keywords :
Raman lasers; aerosols; atmospheric humidity; atmospheric measuring apparatus; atmospheric techniques; excimer lasers; humidity measurement; laser accessories; laser beam applications; laser mirrors; meteorological instruments; optical radar; remote sensing; remote sensing by laser beam; 351 nm; GSFC; NASA; SRL; XeF; aerosol; apparatus meteorological instrument; atmosphere humidity; dichroic mirror; excimer laser; laser beam; laser mirror; lidar; measurement technique; photomultiplier tube; pulsed laser beam; remote sensing; scanning Raman lidar; telescope; water vapor; water vapour; Aerosols; Atmosphere; Atmospheric measurements; Laser beams; Laser radar; Mirrors; NASA; Optical pulses; Telescopes; Wavelength measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International
Print_ISBN :
0-7803-2567-2
Type :
conf
DOI :
10.1109/IGARSS.1995.521758
Filename :
521758
Link To Document :
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