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激光雷达研制及其探测大气气溶胶的实验研究 总被引:7,自引:2,他引:5
作为一种激光探测大气气溶胶特征的新技术,采用分子滤波技术的高光变分辨率激光雷达在国际上得到了发展,给出了对这种YAG激光雷达系统的理论分析并建立了实验装置,其接收望远镜孔径为300mm,YAG激光脉冲能量为150mJ。通过数值模拟与初步测量估计了激光雷达性能,测量了大气回向散射信号,测量结果表明实结果与理论分析一致。 相似文献
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本文在海洋辐射传递研究中建立了变换辐射传递模型,引入了信息传输的概念、理论和研究方法,运用光学信息处理、线性系统理论,较简洁地解决了与水中图象传输密切相关的海水光学传递函数、与海洋激光雷达密切相关的水中窄光束传输、与海洋光学遥感密切相关的海洋辐射传递逆问题、海洋深层特征辐射场分布等海洋光学目前所关注的问题。同时,在海洋光学实验测量方面,引入了光学信息处理方法,简便地完成了传统海洋光学所难以测定的海水小角度(0.05°—1°)散射、长距离海水光学传递函数的测量。 相似文献
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Using the US National Aeronautics and space Administration (NASA) Earth Observing-1 Mission (EO-1) hyperion hyperspectral remote sensing data, we study the shallow-water bathymetry inversion in Smith Island Bay. The fast line-of-sight atmospheric analysis of spectral hypercubes module is applied for atmospheric correction, and principal component analysis method combined with scatter diagram and maximum likelihood classification is used for seabed classification. The diffuse attenuation coefficient Kd is derived using quasi-analytical algorithm (QAA), which performs well in optically deep water. Kd obtained from QAA requires correction, particularly those derived in some coastal areas with optically shallow water and calculated by direct inversion based on radiative transfer theory to obtain the bathymetry. The direct inversion method derives the water depth quickly, and matches the results from optimized algorithm. 相似文献
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Usually, lidar detection systems are optimized for the measurement of the low intensity signal using the photon counting technique, but this approach results in the nonlinear signal response for the higher intensity signal. The problem is successfully solved by the combination of analog-to-digital (AD) and photon- counting (PC) detection. The optimized processing procedure of the signal combination of AD and PC is described, and the corrected result is analyzed and compared with the results by the dealt-time correction method. In this way, the accuracy of wind and aerosol measurement in the nonlinear range is improved. In addition, the signal-to-noise ratios (SNRs) of the two detection methods of AD and PC are compared in the overall dynamic range of signal for the performance analysis. 相似文献
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用海洋光学的辐射传递两流理论导出光学遥感探测海洋中悬浮泥沙的光学模式,并证明其准确性优于现在海洋遥感探测中应用的“对数模式”,理论方法较蒙特卡罗(Monte Carlo)方法简便。实验室水槽测量结果与这一理论模式计算结果一致。 相似文献
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本文论述用频谱面彩色滤波方法对图像进行实时的频谱和密度假彩色编码.频谱假彩色编码是用二维环形彩色滤波器进行滤波来完成的.密度假彩色编码是用双色相衬滤波器使图像反转而实现的.对ERTS(地球资源技术卫星)遥感图片和航空遥感图片进行了直接处理,实验结果证明该方法有效. 相似文献
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本文构造了一种光学-数字混合图象分析系统。整个系统包括功率谱采样、最佳特征选择和分类。对两类海洋波浪(高度相差0.1m)分类的试验结果表明,系统的性能是良好的。系统可以适用于多类浪高的自动测量。 相似文献
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