摘要高空间分辨率(简称“高分”)遥感数据在小面积水体水质遥感监测中具有明显的优势。本研究以西溪湿地为研究对象,结合2013年现场实测数据获得的遥感反射率数据,对准同步的高分遥感影像WorldView-2进行FLAASH(Fast Line—of-sight Atmospheric Analysis of Spectral Hypercubes)、QUAC(quick atmospheric correction)和6S(second simulation of a satellite signal in the solar spectrum)三种大气校正处理,最后对大气校正结果进行精度评价、对比分析、综合判断,评价各种大气校正方法的适用性。结果表明,大气校正可以有效地去除大气影响;对于水体而言,红、绿波段大气校正精度较高;3种大气校正方法中,FLAASH考虑了邻近像元效应,可以减小临近非水体像元的干扰作用,更适用于小面积水体的大气校正处理。58531
Abstract High spatial resolution remote sensing data (hereinafter referred to as "high marks") has obvious advantages monitoring water quality in a small area. XixiWetland as the research object, this study combined with remote sensing reflectance which obtained from the field measurement data in 2013, the WOrldView-2 High Spatial image was done the atmospheric correction using FLAASH model、QUAC
model and 6S model。Finally, evaluating precision、analysis comparative and comprehensive judgement the results of the atmospheric correction. Results show that the atmospheric correction can effectively remove the atmosphere influence. Among three methods of atmospheric corrections, FLAASH is more applicable in processing small area of water. For water, red and green wavelengths have high remote sending refletance and atmospheric correction accuracy is higher. These bands are more suitable for the water quality and reduces the interference from adjacent pixels.
毕业论文关键词: 大气校正; WorldView-2高分影像; FLAASH; QUAC; 6S; 西溪湿地
Keyword: Atmospheric Correction; WorldView-2 High Spatial image; FLAASH; QUAC; 6S; XixiWetland
目 录
1引言 3
1.1选题背景 3
1.2研究意义 3
1.3研究现状 3
2大气校正处理方法 4
2.1 FLAASH 4
2.2 QUAC 4
2.3 6S 4
3研究成果 5
3.1 研究区域 5
3.2 数据预处理 6
3.2.1 高分影像卫星数据及预处理 6
3.2.2 实测光谱数据处理 6
3.3 处理结果分析 7
4 结语 10
5 参考文献 11
1、引言
1.1选题背景
近几十年来,人口的快速增长,工业化、城市化的迅速发展,工业废水和生活污水排放量与日俱增,给河口海岸和内陆湖泊水环境带来许多不利的影响,水环境质量日益恶化,生态系统遭到了严重的破坏。尽管地球上的水资源是可再生的,但是能被人类利用的水资源缺少之又少,环境污染日益严重,水质恶化,全球性的水资源危机对人类基本的生存生活构成严重的威胁,已引起人类的普遍关注。遥感技术具有大面积同步获取地面数据的优势,对于开展水质的遥感监测研究,控制水污染的进一步恶化具有重要的意义,大气校正研究是水质遥感监测的重要基础性工作。