Speaker
Description
The amplitude, polarization, frequency spectrum, and energy fluence of the electric field at a given measurement position are crucial parameters for extracting primary information from radio signals generated by extensive air showers. Therefore, accurate reconstruction of the electric field from recorded antenna signals is therefore essential for advancing radio detection techniques. Traditional methods primarily target electric field reconstruction using antennas with two horizontal polarizations. In this study, we present an analytical least-squares reconstruction method that works for both two- and three-polarization configurations, enabling accurate electric field reconstruction at each antenna. The method has been validated for both simplified and realistic antenna responses, with particular attention to inclined air showers. It achieves a reconstruction accuracy better than 4% for the amplitude and better than 6% for energy fluence estimation, with minimal bias. The approach is robust across nearly all arrival directions, and the directional dependence has been thoroughly investigated. Notably, incorporating vertically polarized antennas significantly improves reconstruction precision, yielding more accurate electric field estimations for inclined air showers. This method enhances the extraction of cosmic-ray properties from detected radio signals, offering critical advancements for current and future experiments.
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