SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: SEPTEMBER YEAR: 2006 Observing Station: OBSERVATORY U P I C E CZECH REPUBLIC Lat.: 50 30 26.6 N Sea level: 416 m Long.: 16 00 43.5 E Frequency: 27 kHz Band pass: 308 Hz a 3 dB Chart speed: 3.4 cm/H Recorder time constant: 27 sec Date Start End Max. Imp. Def. Dur. Type REMARKS UT UT UT SEA min. 1 0752 0844 0816U 1 2 52 3 1014 1104 1046 1 2 50 3 3 0930 1016 0956U 1 2 46 3 1343 1448 1353U 1 2 65 3 7 0700 0725 0709 1 2 25 6 9 1518 1626 1532U 1 2 68 3 10 0959 1028 1011 2 3 29 5 14 1638 1736 1650 1 3 58 5 20 1609 1638 1625 1 2 29 6 Evaluated by L.Krivsky and J.Klimes