SUDDEN  IONOSPHERIC   OF  DISTURBANCES  - SID

Month: DECEMBER   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.
  2     1452    1527    1504     1     3      35     5     P
 10     0917    1022    0930     1     2      65     5     P UNCERTN
 25     1222    1234    1225     1     3      12     5     N    
 27     1251    1432    1306     2     4     101     5     P

        NO OBSERVATION    2. 0920  1315   09. 0840  1400
                         16. 0825  1230   23. 0800  1140
                         30. 1040  1300

        P - POZITIVE EFECT                         
        N - NEGATIVE EFECT

        Evaluated by J.Klimes