基于超光谱成像仪Hyperion的交叉定标方法  

Cross-Calibration Method Based on Hyperspectral Imager Hyperion

作　　者：徐文斌[1] 郑小兵[1] 易维宁[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室,安徽合肥230031

出　　处：《光学学报》2013年第5期279-286,共8页Acta Optica Sinica

基　　金：民用航天"十二五"预先研究项目(D040103)资助课题

摘　　要：介绍了一种新的交叉定标方法。利用超光谱成像仪Hyperion为参考传感器,以Terra/MODIS为待定标传感器,选择敦煌场为目标,考虑了交叉定标过程中视场、时相、几何和光谱等要素的匹配,并预测了MODIS 14个通道的入瞳辐亮度。将预测值与对应通道的实测值进行了比较。结果表明,13个通道的差异不超过7.7%,第9通道的差异为11.9%。交叉定标合成不确定度优于7.7%。初步验证了这一新方法的原理可行性。A new cross-calibration method is proposed. In this method, hyperspectral imager Hyperion is used as reference sensor, Terra and MODIS are used as sensor to be calibrated, and Dunhuang site is selected as target, with matching elements including field, time, geometry and spectrum considered in the process of cross-calibration. At- sensor radiances of fourteen bands of MODIS are predicted, and the predicted values are then compared with the measured values of corresponding bands. The results show that the differences of thirteen bands are no more than 7.7%, and the difference of the ninth bands is 11.9 %. The total uncertainties of cross-calibration are superior to 7.7 %. The principle feasibility of the new method is validated.

关 键 词：遥感 交叉定标 超光谱 匹配 不确定度 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] TP701[自动化与计算机技术—控制科学与工程]