Performance analysis of IRNSS receiver signal strength and accuracy on a moving vehicle

Abstract

Indian Regional Navigation Satellite System (IRNSS) is a indigenous and autonomous satellite navigation system being developed by Indian Space Research Organization. IRNSS operates in two frequency bands namely L5 band (1176.45 MHz) and S1 band (2492.02 MHz). The Objective of IRNSS is to develop a regional navigation and positional accuracy system for Indian applications with 1500 kms. This paper describes a methodology for performance analysis of IRNSS receiver on a probe vehicle. A vehicle is equipped with IRNSS and GPS receiver and the data collected for every second throughout the test field. From the observed data an analysis has been done with vehicle speed, satellite visibility, precision and signal strength. The vehicle speed will not affect the signal strength and accuracy of IRNSS. The precision is consistent over the Indian geographical region when compared to GPS. Though the precision is better with GPS, it's not consistent with satellite visibility over the Indian geographical region.