Tids Detection from Ship-Based GNSS Receiver. First Test on 2010 Maule Tsunami
The VARION (Variometric Approach for Real-Time Ionosphere Observation) algorithm has been successfully applied several times to TIDs (Travelling ionospheric disturbances) detection in a real-time scenario. VARION is, thus, able to estimate sTEC variations in real time and it can be applied on ship-based GNSS receiver since it is based on geometry free combination: the receiver motion does not affect the sTEC estimation process. This work is a feasibility study on the possibility to use data from ship-based GNSS receiver to detect
TIDs. In particular, data of the February 27, 2010, MW 8.8 Chilean (Maule) earthquake and tsunami were analysed.
The preliminary results show that the same TIDs are detected both from the sea (ships) and land. In conclusion, ship-based GNSS receivers could represent a real-time and cost-effective tool to enhance tsunami early warning systems, without requiring the installation of complex infrastructures in open sea.