Indian Regional Navigation Satellite System(IRNSS) is India’s autonomous regional navigation satellite system with 3 Geo Stationary Satellites (GEO) and 4Geo Synchronous Satellites (GSO) satellites and state-of-the art groundsystems. GEO satellites are located at 32.5?E,83?E and 131.
5?E longitude. The remaining Geosynchronous satellites in orbitsof inclined at 29? with equator. Two of the GSOs will cross the equator at 55?Eand other two are at 111.75? E. IRNSS satellites are identified by their PRNnumbers, which range from1 to 12 with system ID is IRi1 (IRNSS ICD-2014). The inclination of IRNSS satellites with respect to equatorprovides coverage in low and higher altitudes near the poles.
IRNSSprovides Standard Positioning Service (SPS) and Restricted Service (RS) to theusers on dual frequencies in L5 (1176.45 MHz) and S1 band (2492.028MHz). Underan Memorandum of Understanding (MoU) with Space Application Centre (SAC), IndianSpace Research Organisation (ISRO), Ahmedabad, IRNSS receiver was installed atCBIT, Hyderabad, (17.39°N, 78.31°E). IRNSS receiver generates data preciselywith respect to the internal trigger with a 1 Pulse Per Second (PPS). The datais stored in two different formats, namely, raw data and NMEA data.
Raw data isa binary file that can be converted using an individual software provided byAccord Software Pvt. Ltd..
The two data formats generated by the software arenamely, Receiver Independent Exchange (RINEX) and Comma Separated Value (CSV)format. CSV files stores the tabular data in a plain text format. CSV filesallows user to convert the files into different spread sheet programs(Shafranovich,2005). The receiver provides severalparameters including 3D RMS user position (ECEF), satellite position(elevation, azimuthal in degrees) and signal strength (dB-Hz) in these CSV files.
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