気温分布の遠隔計測のための回転ラマン散乱方式レーザレーダの開発

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  • キオン ブンプ ノ エンカク ケイソク ノ タメ ノ カイテン ラマン サンラ
  • Development of a Rotational Raman Laser Radar for Remote Atmospheric Telnperature Profiling

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For measuring atmospheric temperature profiles in the lower troposphere,a rotatio na1 Raman Laser Rader (lidar) was developed. For high sensitive rotational Raman scattering measurements,the double grating polychromator was designed and a high Mie rejection ratio over 3 x 106 was obtained with a high overall transmittance of 39%. Using a second harmonic beam of the Nd:YAG laser,random error of the temperature measurement due to signal-to-noise ratio was reduced to土0.5 K at a height of 1 km. Comparisons were made with radiosonde profile data and the result showed good agreement. Various systematic errors were analyzed and reduced by careful system analysis.

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