N. Stoffle, L. Pinsky, M. Kroupa, S. Hoang, J. Idarraga, C. Amberboy, R. Rios, J. Hauss, J. Keller, A. Bahadori et al.: Timepix-based radiation environment monitor measurements aboard the International Space Station. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 782, 143-148 (2015). doi:10.1016/j.nima.2015.02.016