SUDDEN IONOSPHERIC OF DISTURBANCES - SID Month: JANUARY 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. 26 1316 1337 1321 1 2 21 5 P NO OBSERVATION 3. 0812 1309 10. 0906 1355 17. 0838 1302 24. 1114 1216 31. 0845 1120 P = positive efect N = negative efect Evaluated by J.Klimes