The open service signal in space navigation data comparison of the Global Positioning System and the BeiDou Navigation Satellite System.

Shau-Shiun Jan,An-Lin Tao

doi:10.3390/s140815182

Shau-Shiun Jan, An-Lin Tao

Open Access

https://doi.org/10.3390/s140815182

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Journal: Sensors (Basel, Switzerland)	Publication Date: Aug 19, 2014
Citations: 20	License type: CC BY 3.0

Affiliation: National Cheng Kung University

Abstract

More and more Global Navigation Satellite Systems (GNSSs) have been developed and are in operation. Before integrating information on various GNSSs, the differences between the various systems must be studied first. This research focuses on analyzing the navigation data differences between the Chinese BeiDou Navigation Satellite System (BDS) and the United States' Global Positioning System (GPS). In addition to explaining the impact caused by these two different coordinate and time systems, this research uses an actual open service signal in space (SIS) for both GPS and BDS to analyze their current system performance. Five data quality analysis (DQA) mechanisms are proposed in this research to validate both systems' SIS navigation data. These five DQAs evaluate the differences in ephemeris and almanac messages from both systems for stability and accuracy. After all of the DQAs, the different issues related to GPS and BDS satellite information are presented. Finally, based on these DQA results, this research provides suggested resolutions for the combined use of GPS and BDS for navigation and guidance.

Highlights

Due to the fact that the Global Navigation Satellite System (GNSS) has the ability to provide position, velocity and time information to all users near the Earth’s surface, many countries have focused on the development of their own Global Navigation Satellite Systems (GNSSs) for strategic considerations [1]
The Global Positioning System (GPS) ephemeris and almanac data were treated as a baseline by which to evaluate the BeiDou Navigation Satellite System (BDS) ephemeris and almanac data
The five data quality analysis (DQA) proposed in this paper successfully captured the anomalies resulting from the use of BDS navigation data to calculate the satellite information

Summary

Introduction

Due to the fact that the Global Navigation Satellite System (GNSS) has the ability to provide position, velocity and time information to all users near the Earth’s surface, many countries have focused on the development of their own GNSSs for strategic considerations [1]. System (BDS); Global Positioning System (GPS); navigation data; ephemeris; almanac 2. Data Quality Analysis 1 (DQA1): Satellite Position Difference When Ephemeris Updates

Results

Conclusion