Performance Analysis of Software RSIM for Maritime DGPS

Abstract

This paper focuses on the performance analysis of software RSIM for maritime DGPS. This includes the analysis on the performance requirement of RTCM SC-104 document for DGPS service. It details the configuration of current hardware Reference Station and its performance, and also discribes the next generation Nationwide Differential GPS (NDGPS) architecture of the U. S. Coast Guard and the performance. In order to achieve this study, this paper designs the software Reference Station (RS) and Integrity Monitor (IM) architecture, operational module for control and monitor of GPS receivers, module for generating the Differential GPS corrections and converting to RTCM format, and it then broadcasts the Differential GPS corrections to user receivers using MSK modulator. Finally, this paper will present the performance analysis results of the proposed software RSIM.