Abstract:

The low orbit dual-satellites passive location of the ground fixed emitter by measuring the TDOA and FDOA is discussed in this paper.The dual-satellites TDOA/FDOA location formula consists of the TDOA localization formula,FDOA localization formula and WGS-84 ellipsoid earth model.An iterative method is used to improve the precision of location.By the combination of the positioning error algorithm and GDOP method,the main factors influencing the precision of location are systemically analyzed by simulation and comparison.The results are of significance to the dual-satellites positioning system application.

Key words: passive location;TDOA/FDOA;WGS-84;the precision of location