In the long baseline multi-station time difference location system,the radiation source exists different flight speeds relative to the different stations,which results in the Doppler difference among the received signals from each station,therefore has an bad influence on the precise time delay measurement for the radiation source.

After a sufficient and necessary condition of phase interferometer unambiguous direction finding is proved,two methods of ambiguity resolution by combination of long baselines are presented.

The paper introduces Realization way of a long baseline acoustic positioning system for multi-targets, System have high resolution and flexible positioning way, can carry out real-time positioning, monitoring and management by map to multi-targets, The paper else introduces system’s design, component, key arithmetic way and test in sea.

However,the positioning accuracy is related to different errors because of the sparse distribution of reference points and GPS long base-line.

The long-short baselines and information of amplitude are employed to establish a method of setting stiding coarse phase according to the threshold of amplitude difference.

The minor error of baseline length and obliquity will cause high terrain larger error.

Slight errors of baseline length and orientation would result in large terrain height error.

At last an inverse calculation formula of baseline length are deduced.

Analytical calculation of several problems in maritime application of LBL system of AUV;

Under the background of Long Base Line Underwater Target Navigation and Positioning System (LBL), the dissertation discusses its key technique, researches on the wireless telecontrol base station and the PC software.

A scenario that adding the navigation function on primary LBL system is brought forward here under the ground of advanced study of "CR-02"6000 meters AUV.