SUDDEN IONOSPHERIC OF DISTURBANCES - SID Month: MARCH YEAR: 2019 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. 20 1107 1215 1118 2 3 68 5 P 22 0759 0814U 0803 1 2 15U 5 P P = positive efect NO OBSERVATION 14. 0811 1219 21. 1227 1345 28. 0801 1328 Evaluated by J.Klimes