A Study on the DGPS Service Utilization for the Low-cost GPS Receiver Module Based on the Correction Projection Algorithm

Park, Byung-Woon; Yoon, Dong-Hwan

Journal of Navigation and Port Research 2014;38(2):121-126.
Published online April 30, 2014.

위성배치정보와 보정정보 맵핑 알고리즘을 이용한 저가형 GPS 수신기의 DGPS 서비스 적용 방안 연구

박병운, 윤동환

A Study on the DGPS Service Utilization for the Low-cost GPS Receiver Module Based on the Correction Projection Algorithm

Byung-Woon Park, Dong-Hwan Yoon

Abstract

This paper suggests a new algorithm to provide low-cost GPS modules with DGPS service, which corrects the error vector in the already-calculated position by projecting range corrections to position domain using the observation matrix calculated from the satellite elevation and azimuth angle in the NMEA GPGSV data. The algorithm reduced the horizontal and vertical RMS error of U-blox LEA-5H module from 1.8m/5.8m to 1.0m/1.4m during the daytime. The algorithm has advantage in improving the performance of low-cost module to that of DGPS receiver by a software update without any correction in hardware, therefore it is expected to contribute to the vitalization of the future high-precision position service infrastructure by reducing the costumer cost and vender risk.

Key Words: 위성궤도 정보 GNSS(Global Navigation Satellite System);GPS(Global Positioning System);DGPS(Differential GPS);Correction Message;Projection to Position-domain;Ephemeris Data;NMEA(National Marine Electronics Association) format