A reconstruction procedure for near horizon extensive air showers based on radio signals

Understand

Very inclined extensive air showers (EAS), with both down-going and up-going trajectories, are particularly targeted by the next generation of extended radio arrays, such as GRAND.

• Methods to reconstruct the incoming direction, core position, primary energy and composition of showers with these specific geometries, remain to be developed.
• Towards that goal, we present a new reconstruction procedure based on the arrival times and the amplitudes of the radio signal, measured at each antenna station.
• This hybrid reconstruction method, harnesses the fact that the emission is observed, at the antenna level, far away from the emission region, thus allowing for a point-like emission description.