SUDDEN IONOSPHERIC OF DISTURBANCES - SID Month: SEPTEMBER YEAR: 2018 Observing Station: OBSERVATORY U P I C E CZECH REPUBLIC Transmitter coordinates: Receiver coordinates: Lat.: 63 51 1.31 N Lat.: 50 30 26.6 N Long.: 22 28 0.38 W Long.: 16 00 43.5 E Sea level: 416 m Frequency: 37.5 kHz Band pass: 308 Hz a 80 dB Chart speed: 3.4 cm/H Recorder time constant: 1 min Date Start End Max. Imp. Def. Dur. Type REMARKS UT UT UT SID min. NO EVENTS NO OBSERVATION 6. 0823 1320 13. 0828 1350 20. 0853 1011 27. 0813 1400 Evaluated by J.Klimes