First results of the CROME experiment
  It is expected that a radio signal in the microwave range is produced in the atmosphere due to molecular bremsstrahlung initiated by extensive air showers. The CROME (Cosmic-Ray Observation via Microwave Emission) experiment was built to search for this microwave signal. Radiation from the atmosphere is monitored in the extended C band (3.4--4.2 GHz) in coincidence with showers detected by the KASCADE-Grande experiment. The detector setup consists of several parabolic antennas and fast read-out electronics. The sensitivity of the detector has been measured with different methods. First results after half a year of data taking are presented. 
R. Smida, H. Bluemer, R. Engel, A. Haungs, T. Huege, K.-H. Kampert, H.   Klages, M. Kleifges, O. Kroemer, S. Mathys, J. Raut...
hep-ex astro-ph.HE physics.ins-det