OBSERVATORY UPICE MAY 2011 CZECH REPUBLIC FREQUENCY 33 MHz OBSERVING PERIOD 33 MHz 1. - 31. 0400 1800 NO OBSERVATION 33 MHz MAY FREQ STATION TYPE START TIME OF DUR FLUX DENS. REMARKS 2011 TIME MAXIMUM MIN PEAK MEAN UT UT NOT 33 UPIC NO EVENTS CALIBRATED