Abstract Details

Name: Deepthi Ayyagari
Affiliation: IIT Indore
Conference ID: ASI2020_302
Title : Investigating Positional Accuracy during Intense Geomagnetic Storms using NavIC
Authors and Co-Authors : Deepthi Ayyagari, Abhirup Datta
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : This paper presents an observational analysis of the accuracy of the position estimates of NavIC(IRNSS satellites) at Indore. Indore is a low latitude region which is located near the equatorial anomaly crest of Indian sub continent. As a matter of fact the positional accuracy of any satellite based navigation system is predominantly affected by the ionospheric time delay, which in turn is a function of Total electron Content(TEC). During a geomagnetic storm or any ionospheric disturbance period there is a significant enhancement in the TEC especially in the low latitude regions of Indian Subcontinent which has a significant influence over ionospheric time delay and can definitely affect the positional accuracy. However, this is only affects the single frequency position estimations as the real-time actual ionospheric corrections can be possible using dual frequencies. Since the dual frequency receivers are usually used for safety critical and precise positioning applications, it is essential to evaluate the performance of NavIC system as an alternative of existing GPS navigation system. In order to validate the above mentioned statement the position measurements(lat-lon-alt:co-ordinates) for one instant of geomagnetic storm period(September 8 2017) is analyzed with respect to the ionospherically quiet day(September 9, 2017) observed during same month.