【摘要】：為實現(xiàn)水平非均勻分布的低層大氣氣溶膠光學(xué)特性的遙感探測,提出一種基于雙掃描激光雷達的氣溶膠精細探測方法.該方法以掃描激光雷達為遙感探測工具,通過雙激光雷達相向交叉掃描工作模式,實現(xiàn)對同一空域近地表氣溶膠全視野剖面的交叉探測,從而提供雙激光雷達方程組以精確求解氣溶膠消光和后向散射系數(shù).在數(shù)據(jù)反演過程中,通過對交叉掃描區(qū)域進行坐標(biāo)化和網(wǎng)格化處理、網(wǎng)格像素單元的初值預(yù)設(shè),以及雙掃描激光雷達方程組的數(shù)值逼近反演得到氣溶膠消光.利用長距離掃描激光雷達的數(shù)據(jù)對該方法進行驗證,結(jié)果表明,該方法與多角度方法反演所得到的結(jié)果隨高度變化的趨勢具有高度的一致性;同時雙掃描激光雷達可提供交叉掃描區(qū)域剖面的氣溶膠濃度分布,相比于單條廓線具有較大的優(yōu)勢.
[Abstract]:In order to detect the optical properties of aerosols in the lower atmosphere with horizontal non-uniform distribution, a method of fine aerosol detection based on dual-scanning lidar is proposed. In this method, scanning lidar is used as a remote sensing detection tool, and the cross detection of aerosol full field profile near the ground surface in the same airspace is realized by using dual laser radar phase cross scanning mode. In order to solve the aerosol extinction and backscattering coefficient accurately, the double lidar equations are provided. In the process of data inversion, aerosol extinction can be obtained by coordinate and grid processing of cross scanning region, initial value presupposition of grid pixel unit and numerical approximation inversion of double scanning lidar equations. The method is verified by the data of long range scanning lidar. The results show that the results obtained by this method are consistent with the trend of height change. At the same time, dual scanning lidar can provide aerosol concentration distribution in cross-scanned area profile, which is superior to single profile.
【作者單位】： 西安理工大學(xué)機械與精密儀器工程學(xué)院;
【基金】：國家自然科學(xué)基金(Nos.41627807,41305023,41775035) 中國博士后基金(No.2014M560799) 陜西省自然科學(xué)基金(Nos.2014JQ5174;2014KJXX-64)資助~~
【分類號】：TN958.98
，

本文編號：2132869