Abstract:

The GDOP (geometric dilution of precision),based on TDOA (the difference of arrival),of representative 4-Satellite of Y,inverted T,square and diamond are simulated.The influence of the satellite altitude and the length of baseline on the precision of location are analysed.The simulation results show that 4-Satellite location of Y distribution based on TDOA achieves the best precision.The increase in the length of baseline and appropriate irregular distribution contributes to improving the precision of location.

Key words: passive location;TDOA;GDOP