Navigation with Indian Constellation (NavIC) is designed and deployed by Indian Space Research Organization (ISRO) as an indigenous, regional navigational system to provide precise PVT information over the Indian region and surrounding areas. This paper presents a detailed analysis of NavIC visibility under open sky and constrained condition over the service region using an in-house developed simulation tool, the effects of NavIC satellite geometry on single-point solution accuracy and NavIC single and dual frequency solution performances. The results show the potential of NavIC as an alternative navigation system for India and the neighbouring countries in south and south-east Asia, and over an economically important area containing major sea-routes. Even in constrained-visibility conditions, NavIC with its typical constellation design can offer seamless navigation solution over a large region of the globe; the unique S-Band NavIC signal supports enhanced accuracy for stand-alone operation. The results would be beneficial for understanding the potential of NavIC for the user community.
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The authors thank the Space Application Center, Indian Space Research Organization (SAC/ ISRO), Ahmedabad, (Project code: NGP -28) for hardware and financial support. The authors also acknowledge the use of STK free licence and Dr. Shweta Shah, Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat, India for data support.
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Dan, S., Santra, A., Mahato, S. et al. NavIC performance over the service region: availability and solution quality. Sādhanā 45, 144 (2020). https://doi.org/10.1007/s12046-020-01375-5