摘要
WHI(Wide field-of-view Hyperspectral Imager)是具有5nm光谱分辨率的航空成像光谱仪,光谱范围从406nm到985nm。为评价该传感器在二类水体水质监测的性能,2006年1月9日在太湖地区进行航空飞行,并利用ASD和CE318同步测量水面光谱和大气参数。为比较准确的反演水质参数,对该传感器进行场地定标和替代定标,场地定标是对实验室定标后的辐亮度进行再次定标,替代定标利用同步点水面光谱计算的遥感反射率对图像计算的遥感反射率进行标定。最后对WHI进行大气纠正得到太湖的遥感反射率,并利用其他的准同步点进行精度检验,在532nm到750nm之间的大气纠正误差不超过5%。
Wide field-of-view Hyperspectral Imager(WHI) is an airborne imaging spectrometer with a 5nm spectral resolution,of which the spectrum ranges from 406nm to 985nm.For evaluating its application in case-Ⅱwater,a flight was carried out in Taihu in January 9,2006.Meanwhile,the in-situ measured spectra by ASD and measured atmosphere parameters by sun photometer CE318 were also accomplished.Before retrieving water-quality parameters,two crucial recalibration processes were done:Field recalibration was accomplished...
出处
《测绘科学》
CSCD
北大核心
2008年第S1期9-11,共3页
Science of Surveying and Mapping
基金
国防科工委民用航天空间应用项目"新一代环境监测高光谱卫星指标论证"
无星上定标系统小卫星辐射定标关键技术研究(2007AA12Z138)
关键词
辐射定标
大气纠正
WHI
radioactive calibration
atmosphere correction
WHI