Abstract
Global Navigation Satellite System (GNSS) is satellite navigation system for global coverage. GNSS system includes Global Positioning System (GPS) from USA, Global Navigation Satellite System (GLONASS) from Russia, Galileo from Europe, BeiDou from China, Quasi-Zenith Satellite System (QZSS) from Japan, and Indian Regional Navigation Satellite System (IRNSS) from India. A GNSS system consist of a constellation of satellites orbiting earth, continuously transmitting signals that enable users to determine their three-dimensional position with global coverage. Software tools for GNSS provide ability to analyze the navigation system performance. To evaluate the performance of any navigation system a software tool is required. Popular GNSS software tools are discussed in this paper like RTKLIB, GPSTk, gLAB and Bernese. The aim of this study is to compare the software tools for GNSS. These software tools are compared based on their features, support for different GNSS system, support for file formats, and support for operating system platform. Comparison can be helpful to select an appropriate tool as per the requirement.
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