We present a reconstruction algorithm for extensive air showers with zenith angles between 65∘ and 85∘ measured with radio antennas in the 30-80 MHz band. Our algorithm is based on a signal model derived from CoREAS simulations which explicitly takes into account the asymmetries introduced by the superposition of charge-excess and geomagnetic radiation as well as by early-late effects. We exploit correlations among fit parameters to reduce the dimensionality and thus ensure stability of the fit procedure. Our approach reaches a reconstruction efficiency near 100% with an intrinsic resolution for the reconstruction of the electromagnetic energy of well below 5\%. It can be employed in upcoming large-scale radio detection arrays using the 30-80 MHz band, in particular the AugerPrime Radio detector of the Pierre Auger Observatory, and can likely be adapted to experiments such as GRAND operating at higher frequencies.
@article{arxiv.2208.14258,
title = {Reconstructing inclined extensive air showers from radio measurements},
author = {Tim Huege and Felix Schlüter},
journal= {arXiv preprint arXiv:2208.14258},
year = {2022}
}