ASTER Level 1A数据产品文件解析及应用

The Analysis and Geo-location of ASTER Level 1A Data Product

深入解析了ASTER数据的结构,研究如何正确读取数据中卫星的位置、速度、时间、姿态角、姿态变化率等与影像定位有关的数据,并研究了这些数据的变化规律。根据ASTER数据的特点,给出了该数据在辐射校正及影像定位方面的应用方法,使得影像能更好的在这些方面得到应用。

ASTER consists of three different subsystems：the Visible and Near-infrared（VNIR）has three bands with a spatial resolution of 15 m,and an additional backward telescope for stereo;the Shortwave Infrared（SWIR）has 6 bands with a spatial resolution of 30 m;and the Thermal Infrared（TIR）has 5 bands with a spatial resolution of 90 m.ASTER image can be applied in many domains such as land,sea,glacier,atmosphere and so on.This paper analyzed the structure of ASTER data in-depth,gave the method of reading the satellite position,velocity,time,attitude angle and attitude rate,then researched on the changing rule of those data.The method of radiometric correction and geo-location were presented to take the full advantage of the ASTER Image.