Design, Development and Realisation of a Tri-Band (L1, L5 and S) Reference Receiver for NavIC Ground Segment

Aakanksha Avnish Bhardwajan, Prem Ranjan Dubey, Rajath Sadasivan, Suresh Dakkumalla, T Subramanya Ganesh, Sharda Vashisth, Amitava Sen Gupta

Peer Reviewed

Abstract:	Navigation with Indian Constellation (NavIC) is an independent regional navigation satellite system, designed to provide accurate position and time information in the Indian subcontinent and the immediate neighborhood extending to around 1500 kilometers from the Indian geopolitical boundary. Since its inception in 2013, NavIC services have been offered on two frequency bands, namely L5 (centered at 1176.45 MHz) and S (centered at 2492.028 MHz). With the launch of NVS-01 on May 29, 2023, NavIC has entered into a new era with its services being augmented on an additional frequency band namely the L1 (centered on 1545.42 MHz). With the augmentation of space segment, a need arose for the corresponding augmentation of the NavIC ground segment, in particular the IRNSS Range and Integrity Monitoring Stations (IRIMS). IRIMS are equipped with NavIC reference receivers, which are the fundamental measurement engines for the NavIC ground segment. The one-way range measurements generated by these reference receivers are used for orbit determination and time synchronization (ODTS) of the NavIC satellites and also for the ionospheric modelling over the Indian region. Since the launch of first NavIC satellite in 2013, IRIMS have supported the NavIC operations with imported dual-band reference receivers which carry out one-way ranging to NavIC satellites in L5 and S bands. In order to support the additional downlink signals of NavIC starting from NVS-01, it was decided to augment the IRIMS with in-house designed and developed NavIC triband reference receivers. In this paper, the design aspects of the developed and now operational NavIC Tri-band reference receiver are discussed. The performance of the in-house designed and developed NavIC Tri-band reference receiver with that of the existing dual-band reference receiver is also compared.
Published in:	Proceedings of the 2024 International Technical Meeting of The Institute of Navigation January 23 - 25, 2024 Hyatt Regency Long Beach Long Beach, California
Pages:	1007 - 1020
Cite this article:	Bhardwajan, Aakanksha Avnish, Dubey, Prem Ranjan, Sadasivan, Rajath, Dakkumalla, Suresh, Ganesh, T Subramanya, Vashisth, Sharda, Gupta, Amitava Sen, "Design, Development and Realisation of a Tri-Band (L1, L5 and S) Reference Receiver for NavIC Ground Segment," Proceedings of the 2024 International Technical Meeting of The Institute of Navigation, Long Beach, California, January 2024, pp. 1007-1020. https://doi.org/10.33012/2024.19554
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