Major System Error Analysis Based on Tri-satellite TDOA Location System

To calibrate the location errors of a tri-satellite TDOA location system,a quantitative relationship between location errors and different types of measurement errors is established.Meanwhile,an analysis method that derives equivalent TDOA errors from satellite position measurement errors is put forward.Analysis finds out that the major errors are the system errors of TDOA measurement and the system errors of the relative position measurement for the associated satellite.Based on these,a tri-satellite TDOA location calibration system is designed.