OBSERVATORY UPICE APRIL 2013 CZECH REPUBLIC FREQUENCY 33 MHz OBSERVING PERIOD 33 MHz 1. - 30. 0500 1700 NO OBSERVATION 33 MHz APR FREQ STATION TYPE START TIME OF DUR FLUX DENS. REMARKS 2013 TIME MAXIMUM MIN PEAK MEAN UT UT 11 33 UPIC 46 C 0706.6 0711.3 6.6 NOT 21 33 UPIC 3 S 0513.0 0513.2 0.8 CALIBRATED UNCERTN 22 33 UPIC 46 C 1026.5 1027.0 3.0 33 UPIC 45 C 1153.3 1153.4 1.5