Revealing the dynamics of Earth’s lower ionosphere
The lower ionosphere is an ionised region in Earth’s upper atmosphere that extends from 60 to 90 km. Unexpected strong phenomena in this region can dramatically influence the performance and reliability of navigation and communication systems, but their impact is hard to accurately quantify. Funded by the Marie Skłodowska-Curie Actions programme, the ORACLE project will utilise very low frequency (VLF) radio waves as they propagate between Earth’s surface and the ionosphere with low attenuation. Researchers will investigate whether ozone variability affects daily VLF signal variability, probe the yet unknown generation mechanism of VLF emissions with banded structures and improve the detection of galactic gamma-ray bursts in the region.