针对性对地磁辅助导航定位中基准图制备的需要，采用了建立区域地磁场模型的方法。

The method of regional geomagnetic field modeling is adopted in order to prepare for the reference map of geomagnetism-aided navigation and positioning.

youdao

图像匹配是图像导航中的关键技术，图像匹配系统在实时图和基准图之间寻找匹配位置，得到位置信息提供给航行器。

Image match is critical technique in image aided navigation. Image match system finds correspondence between real image and base image and then outputs the position parameters to the aircraft.

youdao