红外, 2015, 36 (5): 30, 网络出版: 2015-05-26  

π空间内土壤的偏振辐射亮度分析

Analysis of Polarized Radiance of the Soil in 2π Space
作者单位
东北师范大学地理科学学院, 吉林 长春 130024
摘要
土壤是人类生存的基础, 是对地遥感图像上反映的最重要的环境信息, 也是研究其他环境要素的基础, 因此对于土壤特性的研究具有十分重要的意义。目前关于土壤在2π空间内的偏振热辐射特性的研究较少。本文对土壤的偏振辐射亮度进行了测量。结果表明, 不同探测角、不同土壤类型的偏振辐射亮度不同。在探测角为60°时, 对土壤偏振辐射亮度的研究效果较显著。随着方位角的改变, 土壤的偏振辐射亮度会发生改变。在0 °~240 °范围内, 随着方位角的增大, 偏振辐射亮度呈现上升趋势, 而在240°~320irc范围内, 则呈现下降趋势。波段的变化会引起土壤的偏振辐射亮度值的改变, 表现为CH1>CH3>CH4>CH2。偏振角对土壤的偏振辐射亮度值会产生一定的影响, 但波动较为平缓。土壤类型不同, 偏振辐射亮度不同, 对各因素的响应程度也不相同。
Abstract
Soil is the foundation for human survival, the most important environmental information reflected in earth remote sensing images and also the basis for studying other environmental elements. So, it is of great significance to study the characteristics of soil. At present, there has been a few studies of the polarized thermal radiation characteristics of soil in 2π space. In this paper, the polarized radiance of soil is measured. The result shows that the polarized radiance of different soil types is different at different detection angles. At the detection angle of 60°, the study of the polarized radiance of soil is more effective. With the change of the azimuth angle, the polarized radiance of soil will change. In the range from 0° to 60°, the polarized radiance of soil has a rising trend with the increase of the azimuth angle. But in the range from 240° to 320°, the polarized radiance of soil has a declining trend. The change of the detection band will cause the polarized radiance of soil to be changed. The order is CH1>CH4>CH4>CH2. The polarizing angle has a certain influence on the polarized radiance of soil too, but the fluctuation amplitude is gentle. For different soil types, the polarized radiance is different and the response to different factors is also different.

刘宇, 卢珊, 赵云升. π空间内土壤的偏振辐射亮度分析[J]. 红外, 2015, 36(5): 30. LIU Yu, LU Shan, ZHAO Yun-sheng. Analysis of Polarized Radiance of the Soil in 2π Space[J]. INFRARED, 2015, 36(5): 30.

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