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美食流:地基差分吸收激光雷达垂直探测大气压力开端实验

大(气压力)是 最[重要]的 情景要素 <之> 一。为 <了实> 现空间《激》光“遥”感 <大气压力,> 需要“先”举行{须要的地}基‘激光’雷《达》探测实验‘研’究。以单纵“模Nd∶YAG激光”器〖的〗二倍频532 nm激“光”脉冲作 为泵浦源,[以KTP(KTiOPO4)晶体]作为非 线「性」转换介 质[的光]参 量振荡(器和)光参“量”放(大)器,〖发生〗了760.236 nm『和760.307 nm 波』长的(两种)激光脉冲,“脉”冲“能”量「为40 mJ,」采(用?350 mm)望远镜《接》收大{气的后}向散“射,从”而获‘得’了差异高 <度> 处与激“光雷”达“之间”双波长的『差分』光{学厚}度。有用《探测高度》为500~4000 m,时(间)分【辨】率「为1~5 min。实」验 结[果]表明, 差分 <光> 学「厚」度「对」应着大【气】层差异 <高> 度【处与激光】雷达间的〖压力差,〗其对应 <相关> 的《数值》表达 是[可以期待的。

]关 键‘词

Abstract

Atmospheric pressure is one of the most important meteorological parameters. In this work, to realize spaceborne laser remote sensing of atmospheric pressure, ground-based lidar measurement investigations are conducted. A 532-nm laser pulse produced by the second-frequency of a single longitudinal-mode Nd∶YAG laser is used as a pump source. An optical parametric oscillator and an optical parametric amplifier using a KTP (KTiOPO4) crystal as a nonlinear conversion medium generate two laser pulses with wavelengths of 760.236 and 760.307 nm, with the pulse energy reaching 40 mJ. A ?350-mm telescope receives the backscattering of the atmosphere, the differential optical depth of two wavelengths between different altitudes and the lidar is obtained. The effective detection altitudes range of the ground-based differential absorption lidar is 500--4000 m, and the time resolution is 1--5 min. The investigations show that the differential optical depth corresponds to the pressure difference between different altitudes of the atmosphere and the lidar, and a numerical expression of the corresponding relationship can be obtained.

(增补)资料

中【图分】类『号:TN959.4

DOI:10.3788/CJL202047.0310003

』所「属栏目:」遥感【与传】感〖器

基金项〗目: <国> 家「自」然科学基【金;

收】稿〖日〗期:2019-09-20

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