SUDDEN  IONOSPHERIC   OF  DISTURBANCES  - SID

Month: APRIL      YEAR: 2017      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    0845    1009    0919     1     2      84      2a          
   2    0753    0925    0800     2     4      92      5                   
        1218    1239    1228     1     2      21      2a                  
        1255    1438    1336     2     4     103      5                 
        1457    1556    1510     1     4      59      5
        1622    1711    1630     1     3      49      5             
   3    0635    0705    0642     1     3      30      5
        0810    0840    0815     1     4      30      5
        1108    1240    1114     1     3      92      5
        1304    1316    1307     1     2      12      5
        1320    1416    1326     2     4      56      5
        1419    1535    1426     2     4      76      5
   4    0705    0724    0711     1     2      19      5
  18    0935    1033    0948     2     3      58      5
  23    1430    1458    1435     1     3      28      5    negat. efekt
        1629    1653    1631     1     3      24      5    negat. efekt

        NO OBSERVATION    6. 0623 1547    13. 0830 1505
                         20. 0830 1524    27. 0830 1537

        Evaluated by J.Klimes