. . "We deal with the planetary wave type oscillations on foF2 above two Japanese and two US stations over a solar cycle (1979-1989) using wavelet transforms. Waves with periods near 5, 10 and 16 days are studied and only events of duration of three wave cycles and more are analyzed. The results are compared with our previous analysis for foF2 and the lower ionosphere above Europe. Typical persistence of oscillations is 4 wave cycles for 5-day, 3.5 for 10-day, and 3 wave cycles for 16-day oscillations in all three geographic areas. The spectral distribution of persistence is too broad to make prediction of their duration possible. Longitudinal extent of oscillations increases with their periods. The persistence of oscillations in foF2 and the lower ionosphere is very similar, but the similarity in occurrence of individual events is rather poor." . "Kri\u017Ean, Peter" . . "Persistence of planetary wave type oscillations in the mid-latitude ionosphere"@en . . "Trv\u00E1n\u00ED oscilac\u00ED typu planet\u00E1rn\u00EDch vln v ionosf\u00E9\u0159e st\u0159edn\u00EDch \u0161\u00ED\u0159ek"@cs . . . "1189;1200" . "1593-5213" . . "49" . "Trv\u00E1n\u00ED oscilac\u00ED typu planet\u00E1rn\u00EDch vln v ionosf\u00E9\u0159e st\u0159edn\u00EDch \u0161\u00ED\u0159ek"@cs . . "[3DED1F47A5E5]" . "\u0160auli, Petra" . "La\u0161tovi\u010Dka, Jan" . "491821" . "12"^^ . . "IT - Italsk\u00E1 republika" . "Persistence of planetary wave type oscillations in the mid-latitude ionosphere" . . "planetary wave; oscillations; ionosphere; atmosphere; foF2"@en . "RIV/68378289:_____/06:00085428" . . "We deal with the planetary wave type oscillations on foF2 above two Japanese and two US stations over a solar cycle (1979-1989) using wavelet transforms. Waves with periods near 5, 10 and 16 days are studied and only events of duration of three wave cycles and more are analyzed. The results are compared with our previous analysis for foF2 and the lower ionosphere above Europe. Typical persistence of oscillations is 4 wave cycles for 5-day, 3.5 for 10-day, and 3 wave cycles for 16-day oscillations in all three geographic areas. The spectral distribution of persistence is too broad to make prediction of their duration possible. Longitudinal extent of oscillations increases with their periods. The persistence of oscillations in foF2 and the lower ionosphere is very similar, but the similarity in occurrence of individual events is rather poor."@en . "Z(AV0Z30420517)" . "Persistence of planetary wave type oscillations in the mid-latitude ionosphere"@en . "Persistence of planetary wave type oscillations in the mid-latitude ionosphere" . . . . "3"^^ . "RIV/68378289:_____/06:00085428!RIV08-AV0-68378289" . . "Zab\u00FDv\u00E1me se oscilacemi typu planet\u00E1rn\u00EDch vln v foF2 nad dv\u011Bmi ionosf\u00E9rick\u00FDmi stanicemi v Japonsku a dv\u011Bmi v USA za obdob\u00ED 1979-1989 s pou\u017Eit\u00EDm wavelet transformac\u00ED. Studujeme vlny s periodami okolo 5, 10 a 16 dn\u00ED a pouze p\u0159\u00EDpady trvaj\u00EDc\u00ED minim\u00E1ln\u011B t\u0159i vlnov\u00E9 cykly. V\u00FDsledky jsou srovn\u00E1ny s na\u0161\u00ED d\u0159\u00EDv\u011Bj\u0161\u00ED anal\u00FDzou pro foF2 a doln\u00ED ionosf\u00E9ru nad Evropou. Typick\u00E9 trv\u00E1n\u00ED oscilac\u00ED je 4 vlnov\u00E9 cykly pro T = 5 dn\u00ED, 3,5 vlnov\u00E9ho cyklu pro T = 10 dn\u00ED a 3 vlnov\u00E9 cykly pro T = 16 dn\u00ED ve v\u0161ech t\u0159ech geografick\u00FDch oblastech. Spektr\u00E1ln\u00ED rozd\u011Blen\u00ED trv\u00E1n\u00ED oscilac\u00ED je velmi \u0161irok\u00E9, tak\u017Ee neumo\u017E\u0148uje p\u0159edpov\u011B\u010F jejich trv\u00E1n\u00ED. D\u00E9lkov\u00FD rozsah oblasti oscilac\u00ED roste s r\u016Fstem jejich periody. Trv\u00E1n\u00ED oscilac\u00ED v foF2 a doln\u00ED ionosf\u00E9\u0159e nad Evropou je podobn\u00E9, ale individu\u00E1ln\u00ED p\u0159\u00EDpady v\u00FDskytu oscilac\u00ED si zpravidla neodpov\u00EDdaj\u00ED."@cs . . "Annals of Geophysics" . "-" . . . "3"^^ . .