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基于辐射度的地表二向反射因子模拟与敏感性分析

Simulation and Sensibility Analysis of Earth Surface Bidirectional Reflectance Factor Based on Radiosity

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摘要

传统的固定成像传感器多用于分析地物自身生物化学参数改变而导致的光谱变化, 而用于研究二向反射特性的计算机模拟模型受构建场景时可视因子计算量过大的限制而无法完成多类型地物的模拟, 因此两者较少有联系。针对这些问题, 在采用简化辐射度模型RAPID的基础上, 模拟了长春市御花园地区的反射率, 分析了反射率对环境因素的敏感性。结果表明:传感器视场角对热点有较大影响, 太阳天顶角和天空光比例在可见光与近红外波段各方向均有较大影响。模拟环境因素对成像光谱的影响, 可为固定成像传感器反演地物的生物化学参数提供依据。

Abstract

Conventional fixed imaging sensors are mostly used to analyze the changes of spectrum resulting from changes in the biochemical parameters of the ground objects. However, the computer simulation model used to study the bidirectional reflectance characteristics can not complete the simulation of multiple types of ground objects because of the large amount of view factors that need to be calculated when constructing a scene. Therefore, there is less connection between them. To deal with these problems, based on the Radiosity Applicable to Porous Individual objects (RAPID), we simulate the reflectance of the Yuhuayuan area in Changchun City and analyze the sensitivity of the reflectance to the environment factors. The results show that the field of view of the sensor has a strong influence on hot spot. The solar zenith angle and sky light ratio have a strong influence on all directions of the visible and near-infrared bands. Simulating the influence of environmental factors on the imaging spectrum is a good way to provide the basis for inversion of the ground objects of the biochemical parameters of fixed imaging sensor.

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中图分类号:TP751

DOI:10.3788/lop55.092802

所属栏目:遥感与传感器

基金项目:基于互联网的农业保险卫星综合应用示范项目(吉发改投资[2016]512号)、长白山学科科研项目(JJLZ[2015]54)

收稿日期:2018-03-09

修改稿日期:2018-04-17

网络出版日期:2018-04-22

作者单位    点击查看

甄治钧:吉林大学地球探测科学与技术学院, 吉林 长春 130026
陈圣波:吉林大学地球探测科学与技术学院, 吉林 长春 130026
覃文汉:吉林大学地球探测科学与技术学院, 吉林 长春 130026
李健:吉林大学地球探测科学与技术学院, 吉林 长春 130026
孟凡晓:吉林大学地球探测科学与技术学院, 吉林 长春 130026
于岩:吉林大学地球探测科学与技术学院, 吉林 长春 130026

联系人作者:陈圣波(chensb@jlu.edu.cn); 甄治钧(zhenzj16@mails.jlu.edu.cn);

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引用该论文

Zhen Zhijun,Chen Shengbo,Qin Wenhan,Li Jian,Meng Fanxiao,Yu Yan. Simulation and Sensibility Analysis of Earth Surface Bidirectional Reflectance Factor Based on Radiosity[J]. Laser & Optoelectronics Progress, 2018, 55(9): 092802

甄治钧,陈圣波,覃文汉,李健,孟凡晓,于岩. 基于辐射度的地表二向反射因子模拟与敏感性分析[J]. 激光与光电子学进展, 2018, 55(9): 092802

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