Comparison of Precise Sagnac Effect corrections for Navigation with Indian Constellation (NAVIC) Satellites and Global Positioning System (GPS) satellites

Abstract

Precise clock information helps Global Positioning System receivers to achieve high positional accuracy. One of the predominant error source on GPS time is Sagnac effect. An effect arising due to the daily movement of observer on earth because of its rotation. In this paper, the pattern of Sagnac corrections for each second is developed for a regional navigation system named Navigation with Indian Constellation (NAVIC). The clear variations for Geo-Stationary Earth orbit satellites (GEO’s) and Geo-Synchronous orbit satellites (GSO’s) in Sagnac corrections is calculated for the ephemeris received from a NAVIC receiver that is placed at low-latitude Indian region (lat:16.32° N; lon:80.44° E). The Sagnac correction for GPS satellite data recorded from a GNSS Ionospheric Scintillation and TEC Monitor (GISTM) receiver (Novatel) at KLEF, Guntur, India are also presented. The maximum Sagnac corrections for a day obtained for NAVIC and GPS satellites is also foreseen.