Presented is the analytic solution of both the parameter equation of localization center and the localization depth of fringes of wedge interference,analytically researched is the dependence of the localization center and the localization depth on the factors such as angle of incidence,angle of wedge,relative refractive index between two media,position of the light source.

Using velocity function in transformed depth domain to make synthetic seismograph in depth domain;

Inversion of lithologic parameters driven by neural network data in depth domain.;

This text mainly discusses organizing of long-distance air observation for warship formation,and analysis the methods of calculating observing area-depth.