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.

印度星座导航（Navro）是由印度空间研究组织（ISRO）设计和部署的，它是一种本地的，区域性的导航系统，可在印度地区及周边地区提供精确的PVT信息。本文使用内部开发的仿真工具，对在服务区域内的天空和受限条件下的NavIC可见性进行了详细分析，介绍了NavIC卫星几何形状对单点解精度和NavIC单频和双频解性能的影响。结果表明，NavIC作为印度和南亚，东南亚邻国以及经济上重要的主要航线区域的替代导航系统的潜力。即使在可见度受限的情况下，NavIC具有典型的星座设计，可以在全球大部分地区提供无缝的导航解决方案。独特的S波段NavIC信号支持独立运行的更高准确性。结果将有助于了解NavIC对用户社区的潜力。