Forbush decreases registered onboard aircraft

Recent gamma background measurements at high mountain altitude

“…It has been used for radiation measurements at high mountain altitude (Spurny and Langer, 2006). The MDU Liulin demonstrated high capabilities for different problems, specifically measurements at flight altitudes and registration of solar energetic particles (Spurny and Dachev, 2001;Spurny et al, 2002Spurny et al, , 2005. Quite recently it was installed at BEO Moussala (Gelev et al, 2007;Spurny et al, 2007).…”

Liulin silicon semiconductor spectrometers as cosmic ray monitors at the high mountain observatories Jungfraujoch and Lomnický štít

“…An example of such a semiconductor detector is the Bulgarian silicon semiconductor spectrometer Liulin [9]. For example, the Liulin placed on-board a Czech Airlines commercial jet aircraft successfully registered the solar cosmic ray event on 15 April 2001 and the following Forbush decrease [10]. Several Liulin detectors have been installed at the high-mountain observatories, for instance at Moussala (Bulgaria, 2925 m), Jungfraujoch (Switzerland, 3475 m) and Lomnický štít (Slovakia, 2632 m) observatories [11][12][13].…”