  The Hellenic Open University extensive air shower array (also known as
Astroneu array) is a small scale hybrid detection system operating in an area
with high levels of electromagnetic noise from anthropogenic activity. In the
present study we report the latest results of the data analysis concerning the
estimation of the shower direction using the spectrum of the RF system. In a
recent layout of the array, 4 RF antennas were operating receiving a common
trigger from an autonomous detection station of 3 particle detectors. The
directions estimated with the RF system are in very good agreement with the
corresponding estimations using the particle detectors demonstrating that a
single antenna has the potential for reconstructing the shower axis angular
direction.
