Method for improving positioning accuracy by using double low-precision GPS

In order to improve the measurement accuracy of GPS, this paper proposes two methods to improve the accuracy of dual low-precision GPS positioning. First, two GPS cards of the same model are placed on the two hulls of the catamaran, and the position information of the hull is measured by the dual GPS card; Then, method 1 performs Kalman filtering processing on the position information measured by the dual GPS, and analyzes the filtering effect, and averages the two sets of data after the double GPS filtering, and the average value is the position information of the center of the hull; Method 2 obtains the mean value of the position information measured by the dual GPS, performs Kalman filtering on the mean value, and uses the filtered value as the position information of the hull center; Finally, the effectiveness of the two methods was verified by experiments. Experiments show that the two methods proposed in this paper have obvious effects on improving the accuracy of low-precision GPS positioning.