SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: DECEMBER YEAR: 2006 Observing Station: OBSERVATORY U P I C E CZECH REPUBLIC Lat.: 50 30 26.6 N Sea level: 416 m Long.: 16 00 43.5 E Frequency: 27 kHz Band pass: 308 Hz a 3 dB Chart speed: 3.4 cm/H Recorder time constant: 27 sec Date Start End Max. Imp. Def. Dur. Type REMARKS UT UT UT SEA min. 4 1130 1241 1204U 1 2 71 3 5 0955 1348 1033 2 3 233 5 6 1257 1342 1302 2 3 45 5 9 1208 1240 1214 1 3 32 5 11 1717 1738 1720 1 2 21 5 UNCERTN 12 0914 0952 0931 1 2 38 3 13 0903 1044 0932U 1 2 101 3 UNCERTN 14 1220 1347 1248U 1 2 87 3 UNCERTN 15 1059 1124 1109 1 2 25 5 UNCERTN 1238 1351 1302U 1 2 73 3 UNCERTN 19 1052 1133 1100U 1 2 41 5 1302 1416 1327U 1 2 74 3 23 0904 0942 0922U 1 2 38 3 UNCERTN 1136 1205 1141 1 2 29 5 UNCERTN 31 0705 0738 0708 1 2 33 5 1004 1055 1006 1 2 51 5 UNCERTN The evaluation is not available for a strong radio disturbation: Date From To Date From To Date From To 01 0605 1555 02 0610 1055 03 0610 1400 04 0555 1100 04 1300 1525 05 0625 0930 06 0715 1040 07 0610 1155 08 0605 1200 11 0915 1710 25 0550 0715 27 0620 1200 28 0655 1115 29 0535 0615 Evaluated by L.Krivsky and J.Klimes