MODELING METHOD OF LOCAL IONOSPHERE DELAY MODEL AND DIFFERENTIAL SATELLITE

摘要

PURPOSE: A DGPS(differential GPS)system is provided to minimize the deviation due to the ionosphere delay by ionosphere delay model, enable the accurate positioning. CONSTITUTION: A DGPS(differential GPS)system comprises the steps of: measuring the inclined ionosphere delay(21) value on the visible GPS satellite(58); evaluating the bias between GPS receiver and L1/L2 frequency of GPS satellite,also basic model perimeter; creating the basic ionosphere delay model(31); evaluating the vertical ionosphere delay(20) value without bias; evaluating perturbation model perimeter; evaluating perturbation ionosphere delay model(32); creating the local ionosphere delay model(30).