LOPES is one the pioneering experiments for the measurement of radio emission from air showers with digital radio receivers. It is set up at the site of the KASCADE-Grande air shower array and takes data in conjunction with it. This gives us the unique possibility to combine LOPES and KASCADE-Grande data.

In its second phase LOPES has been extended to 30 antennas, which increases the detection rate of well reconstructed events. Also a new, absolute calibration of the radio antennas is now available. By correlating the measured radio pulse height with air shower parameters measured by KASCADE-Grande, we have derived a formula that describes the radio pulse height as a function of air shower geometry and primary particle energy. Thus allowing us to estimate the cosmic ray energy from radio data.

LOPES

Proceedings of the 30th International Cosmic Ray Conference; Rogelio Caballero, Juan Carlos D'Olivo, Gustavo Medina-Tanco, Lukas Nellen, Federico A. Sánchez, José F. Valdés-Galicia (eds.); Universidad Nacional Autónoma de México, Mexico City, Mexico, 2008; Vol. 4 (HE part 1), pages 83-86