The solar flares and geomagnetic storms are considered a potential threat for the upcoming Indian Regional Navigation Satellite System or Navigation with Indian Constellation (NavIC). Therefore, we investigated in detail the occurrence of tracking failure and effects on the positional accuracy of the NavIC L5-band and S-band system under direct exposure of X2.2 and X9.3 solar flare on September 6, 2017, X9.3 is the strongest event since the NavIC signals are in the service. The regional NavIC data (5–6 September 2017) from the equatorial region Trivandrum station and the Equatorial Ionization Anomaly area in India (Surat, Bombay, Hyderabad and Gandhinagar stations), are collected using the accord NavIC dual-frequency (L5-band and S-band) receivers. We have shown that the 1G NavIC signals remain in loss of lock condition for 1 h on September 6, 2017 (X2.2 and X9.3 solar flares), and as a result, positioning accuracy deviated on September 6, 2017. Hence, the solar flare event considered a potential threat for future NavIC based autonomous navigation technologies.

太阳耀斑和地磁风暴被认为对即将到来的印度区域导航卫星系统或印度星座导航（NavIC）构成潜在威胁。因此，我们在2017年9月6日X9.3直射X2.2和X9.3太阳耀斑下，详细调查了跟踪失败的发生以及对NavIC L5波段和S波段系统的定位精度的影响这是最强的事件，因为NavIC信号已投入使用。来自印度赤道地区特里凡得琅站和赤道电离异常区（苏拉特，孟买，海得拉巴和甘地纳加尔站）的区域NavIC数据（2017年9月5日至6日）是使用NavIC双频（L5波段和S波段）接收器。我们已经证明1G NavIC信号在9月6日保持1小时的失锁状态