Because of the complex surface and subsurface conditions, the field acquisition is difficult, and the data acquired is low in S/N ratio, and the subsurface structures difficult in imaging.

• 由于山地地表条件复杂多变，地下构造多为高陡构造，褶皱断层发育，野外施工困难，原始资料品质低，所以地下构造成像困难。