The radio emission pattern of air showers as measured with LOFAR - a   tool for the reconstruction of the energy and the shower maximum
  The pattern of the radio emission of air showers is finely sampled with the Low-Frequency ARray (LOFAR). A set of 382 measured air showers is used to test a fast, analytic parameterization of the distribution of pulse powers. Using this parameterization we are able to reconstruct the shower axis and give estimators for the energy of the air shower as well as the distance to the shower maximum. 
A. Nelles, S. Buitink, A. Corstanje, J. E. Enriquez, H. Falcke, J.R.   H\"orandel, J.P. Rachen, L. Rossetto, P. Schellart, O...
astro-ph.HE astro-ph.IM