SUDDEN IONOSPHERIC OF DISTURBANCES - SID Month: OCTOBER 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. 26 1722 1754 1733 2 4 32 5 P UNCERTN 28 1602 1625 1606 2 4 23 5 N UNCERTN 29 1145 1317U 1152 1 3 92U 5 P 1630 1641 1633 1 3 11 5 P P = positive efect N = negative efect NO OBSERVATION 8. 0855 1240 15. 0700 1315 22. 0700 1405 Evaluated by J.Klimes