Investigation of influence of season alternance and terrain undulation on scene matching guidance

摘要

The influence of season and terrain on the performance of the scene matching end guidance is studied, respectively. Seasonal changes would result in the regular transformation of surface vegetation, especially the ratio of water, which could change the electromagnetic characteristics of the ground. Complex permittivity changes regularly according to the liquid water storage per unit, while the quantity of signal attenuation increases with the transmitting frequency. On the other hand, the status of the surface of the earth as well as internal elements of the radar will influence the precision of height measurement, which can bring indirect influence for the image matching. Undulating terrain can also cause changes of the electromagnetic characteristics, which lies in the translation of image points, and there is a close relationship between the position offset and the altitude of the image area.