调制传递函数是反映卫星光学相机成像性能的重要参数,针对调制传递函数多种在轨检测方法,本文在分析了可利用地面景物的基础上,结合目前卫星光学相机分辨率不断提高的现状,着重从原理和方法上介绍了利用不同亮度地块接壤的地面靶标进行检验的刃边法,同时依据实验研究成果,介绍了对原始刃边数据拟合和调制传递函数的频谱增密技术,这些技术对提高调制传递函数获取精度具有重要的作用。

Modulation transfer function(MTF) is an essential parameter which characterizes imaging quality of satellite optical camera.We present a review of techniques for modulation transfer function in-flight measurement and emphasize the technique of knife edge according to situation of developing ground sample distance.The important techniques of data fitting and frequence augment are discussed on the bases of mathematics and digital signal processing theory.These techniques are important to improve accuracy of acquired modulation transfer function.