SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: SEPTEMBER YEAR: 2007 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. 3 0529 0558 0535 1 2 29 5 UNCERTN 0752 0828 0759 1 3 36 5 UNCERTN 15 1014 1131 1031 1 2 77 5 UNCERTN Evaluated by J.Klimes