SUDDEN IONOSPHERIC OF DISTURBANCES - SID Month: DECEMBER YEAR: 2016 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 1. 0940 1535 8. 0830 1450 15. 0830 1530 22. 0830 1515 29. 0830 1530 Evaluated by J.Klimes