改进的拟合算法在海面辐射校正中的应用

A Modified Fitting Algorithm for Radiometric Correction of Sea Surface

应用机载成像光谱仪采集的海面红外波段遥感数据,分析了传感器对海面的观测角度、大气效应和地物的非朗伯特性理论。在此基础上,针对数据中存在的辐射量畸变,在沿扫描线方向上,认为传感器接收到的辐射强度并不严格满足余弦变化规律,并对视向角给出了一种改进的拟合算法。根据此算法,对数据进行了辐射校正处理并对结果进行了分析。在实际应用中,建立了相应校正模型及其软件模块,取得了良好的图像处理效果。

By analyzing the near infrared and thremal infrared band data of imaging spectrometer on sea surface and taking advantage of the angle observation of sensor and atmospheric effect and Non-Lambert features of the sea surface, we adopt a modified fitting algorithm above observed angle for radiometric aberrance data following on the direction of scan line. In practice, we establish a correction model and build the corresponding software with the above methods to processing of data and the results show well.