摘要
遥感影像获取时受传感器本身、太阳高度角、大气、地形等因素对地面光谱反射信号的影响,导致多时相影像上同一目标的光谱特征差异很大.为了进一步的应用研究,必须要先进行辐射校正.以黑龙江省海伦市及其周边地区作为研究区,将太阳高度角校正、辐射校正、日地距离校正和相对辐射校正方法结合使用,将其它因素引起的光谱值差异减小到最小值,在一定程度上提高了校正精度,达到预期目的.
Remote Sensing Images which were effected by sensors, solar elevation angle, atmosphere and topographty, impacted spectral signal acquired in the gRound so that the same objects had a large difference of spectral characters on the multitemporal images. Before we studied soil, we must made radiometric calibration. We combined solar elevated angle, radiometric calibration and solar-earth distances calibration with relative radiometric calibration in Hailun municipal region of Heilongjiang Province. These method in the article decreased to the smallest spectral differences arose by other factors, and improved calibration precision largely.
出处
《新疆地质》
CAS
CSCD
2007年第3期323-326,共4页
Xinjiang Geology
基金
中国国土资源航空物探遥感中心资助项目(1212010510613)资助
关键词
相对辐射校正
ASTER
多时相影像
Relative radiometric calibration
ASTER
multitemporal images
