SUDDEN IONOSPHERIC OF DISTURBANCES - SID Month: MAY YEAR: 2020 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. 29 0721 0804 0726 1 4 43 5 P 1046 1136 1047 1 4 50 5 P 1420 1433 1426U 1 2 13 6 P P = positive efect NO OBSERVATION 7. 0800 1330 14. 0930 1210 21. 0920 1350 28. 1015 1445 Evaluated by J.Klimes