The author has verified a new trigonometric leveling method which proceeds measures as follows:It is based on ATR(Automatic Target Recognition),avoids vertical refractional influence through reciprocal observation at the same time, designs observational routes to form spanning quadrilaterals across obstacle and adopts a new weight factor from precision estimation.

Simultaneous observations of optical and electrical signals and pattern recognition in lightning flashes classification;

This paper discusses the method of the optimization of GPS network executing scheme at high precision and large-scale in network form design,districting of simultaneous observation area,sequence of observation,operating mode of control and adjusting.