RAMSES: German Meteorological Service autonomous Raman lidar for water vapor, temperature, aerosol, and cloud measurements

被引:110
|
作者
Reichardt, Jens [1 ]
Wandinger, Ulla [2 ]
Klein, Volker [3 ]
Mattis, Ina [2 ,4 ]
Hilber, Bernhard [5 ]
Begbie, Robert [1 ]
机构
[1] Richard Assmann Observ, Deutsch Wetterdienst, D-15848 Lindenberg, Germany
[2] Leibniz Inst Tropospher Res, D-04318 Leipzig, Germany
[3] Kayser Threde GmbH, D-81379 Munich, Germany
[4] Meteorol Observ Hohenpeissenberg, Deutsch Wetterdienst, D-82383 Hohenpeissenberg, Germany
[5] Loritus GmbH, D-80538 Munich, Germany
关键词
BACKSCATTER; EXTINCTION; VALIDATION; MOISTURE; FACILITY;
D O I
10.1364/AO.51.008111
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The Raman lidar for atmospheric moisture sensing (RAMSES) for unattended, continuous multiparameter atmospheric profiling is presented. A seeded frequency-tripled Nd:YAG laser serves as the light source. A nine-channel polychromator, nonfiber coupled to the main telescope (790 mm diameter), is used for far-range measurements. Near-range observations are performed with a three-channel polychromator, fiber coupled to a secondary telescope (200 mm diameter). Measurement parameters are water-vapor mixing ratio (MR), temperature, and the optical particle parameters, which are extinction coefficient, backscatter coefficient, lidar ratio, and depolarization ratio at 355 nm. Profiles of water-vapor MR are measured from close to the surface up to 14 km at night and 5 km during the day under favorable atmospheric conditions in 20 min. Temperature profiles of the troposphere and lower stratosphere are determined with the rotational-Raman technique. For the detection of the rotational Raman signals, a new beamsplitter/interference-filter experimental setup is implemented that is compact, robust, and easy to align. Furthermore, the polychromator design allows two independent methods for calibrating measurements of depolarization ratio. RAMSES optical design concept and experimental setup are detailed, and a description of the operational near-real-time data evaluation software is given. A multiday observation is discussed to illustrate the measurement capabilities of RAMSES. (C) 2012 Optical Society of America
引用
收藏
页码:8111 / 8131
页数:21
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