SUDDEN IONOSPHERIC OF DISTURBANCES - SID Month: MAY 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. 1 0917 0947 0923 1 3 30 5 NO OBSERVATION 2. 0620 2400 3.- 31. 0000 2400 Evaluated by J.Klimes