SUDDEN IONOSPHERIC OF DISTURBANCES - SID Month: APRIL 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. 6 1000 1038 1008 1 3 38 5 1641 1711 1649 1 3 30 5 9 1300 1430 1325 1 2 90 5 12 0743 0820 0754 1 2 37 5 15 1423 1535 1430 1 3 72 5 NO OBSERVATION 1. 0000 2400 2. 0000 2400 3. 0000 2400 4. 0000 0610 7. 0830 1520 14. 1000 1550 21. 0830 1515 28. 0830 1535 Evaluated by J.Klimes