SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: APRIL YEAR: 2016 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. 6 1000 1057 1012 1 2 57 3 9 0612 0635 0616 2 3 23 5 12 0746 0814 0755 1 2 28 6 28 1246 1317 1252 1 2 31 5 NO OBSERVATION: 1. 0000 2400 2. 0000 2400 3. 0000 2400 4. 0000 0610 Evaluated by J.Klimes