GIS支持下的像元地面方向反射几何参数计算

Principles and methodology for geometrical parameter calculation of BRDF by GIS

像元地面方向反射几何参数的计算在地物BRDF的遥感反演研究和多角度遥感数字图像的处理中有重要意义。对卫片像元地理位置和地面坡度、坡向以及高度的变化对像元与太阳、像元与卫星的相对几何取向和相互位置的影响进行了讨论。并完成了由任意卫片像元地面太阳入射方位角、入射角、反射方位角 (卫星视方位角 )、反射角 (视角 )

This paper presents a method to calculate the geometrical parameters of the ground pixels in remote sensing image for BRDF. Relationship of the geometric position and orientation between the ground pixel (such as pixel location, slope, surface height etc.) and sun-sensor is discussed. Calculations show the effects from zenith and azimuth angles of the pixel towards the sun and satellite sensor, and other geometrical parameters of BRDF.