.3 ¡÷ T Positioning Principle And Positioning Errors

At first this paper introduced the principles of 3â–³t passive position-finding system. We put much attention to the key technique -- time synchronization. Then we discussed employing GPS common-view technique to realize the nanosecond-level relative time synchronization among different ground-station. The precision analysis of 3â–³t passive position-finding system and the design of time recorder are also researched in this paper. Some defects among designing and suggestions for the following jobs are raised at the end of the paper.