SUDDEN  IONOSPHERIC   OF  DISTURBANCES  - SID

Month: FEBRUARY   YEAR: 2021     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.
 28.    0634    0640    0706     1     2      32      5    P  U

        NO OBSERVATION    4. 0845 1405    11. 0700 1220
                         18. 0700 1130    20. 1520 1830

                         25. 0750 1245

        P pozitive efect

        Evaluated by J.Klimes