Predicting and Analyzing TEC Variations Using Wavelet and Hilbert Huang Decomposition for IRNSS Signals at Low Latitude Location, Surat, India

摘要

Indian Regional Navigation Satellite System (IRNSS) is designed for various navigational and timing services in India. IRNSS receiver has been installed at SVNIT, Surat which is a low latitude station. In this paper, one of the major error in satellite communication which is Ionospheric effects on satellite signals while propagating in various layers of atmosphere known as Ionospheric Scintillation and its measuring parameters are discussed. IRNSS receiver is utilized to estimate Total Electron Content (TEC), Vertical total electron content (VTEC), Elevation angle and Carrier to noise (C/N) ratio. Daubechies wavelet decomposition and Hilbert Huang decomposition (HHT) of TEC is presented.