Geophysical Centre in Dourbes

Pilot Network for Identification of Travelling Ionospheric Disturbances in Europe (Net-TIDE)

A new international project - Pilot Network for Identification of Travelling Ionospheric Disturbances in Europe (Net-TIDE) - with RMI ionospheric research team participation and NATO Science for Peace and Security Programme funding, commenced in November 2014 (NATO HQ News). The objective is to develop a prototype system that provides in real-time an assimilative electron density model of the ionosphere with the required sensitivity to identify and track Travelling Ionospheric Disturbances (TIDs). The system will make use of the existing network of DPS-4D digital ionospheric sounders in Europe which will be trained to diagnose the TIDs applying the Frequency and Angular Sounding (FAS) technique. The FAS technique is based on measuring the variations of the angles-of-arrival and Doppler frequencies of ionospherically-reflected HF radio signals. It offers a possibility of using transmissions from broadcasting stations as probing signals, leading to reduced overall system costs by using a single receiving site to monitor several transmitters making measurements over a large area. The project aims at testing and implementing for the first time a novel experimental technique for identification and tracking TIDs over a specific region, such as Europe, using high precision ionospheric DPS-4D sounders operated by the participating nations. The performance of this technique is expected to be much more reliable than other (indirect) methods since it is based on direct observations, which is one of the novel aspects of the project. This will lead to the development of a robust, effective, and inexpensive system for remote detection and diagnostics of this type of ionospheric irregularities that can provide information and warnings directly exploitable by the users in support of their developments of mitigation techniques.

Funding: NATO Contract Ref. NATO-SPS-984894