The method research of Envisat-1 ASAR data preprocessing includes radiometric calibration, geometrical correction and speckle reduction.
主要的研究内容如下：(1)ASAR数据预处理方法研究，包括辐射定标、几何校正和斑点噪声的去除。
2
Recently, hyperspectral imagery has come into the picture, which provides a very high spatial resolution while capturing extremely fine radiometric resolution data.
最近，高光谱图像已生效的图片，它提供了一个非常高的空间分辨率，同时拍摄的极其精细的辐射分辨率数据。
3
Using the data interface of spectroradiometer, spectral radiometric calibration can be achieved for the system.