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http://dx.doi.org/10.5394/KINPR.2014.38.2.121

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

Park, Byung-Woon (School of Aerospace Engineering Sejong University)
Yoon, Dong-Hwan (School of Aerospace Engineering Sejong University)
Publication Information
Journal of Navigation and Port Research / v.38, no.2, 2014 , pp. 121-126 More about this Journal
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.
Keywords
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;
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