About: Power line harmonic radiation observed by satellite: Properties and propagation through the ionosphere

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present results of a systematic survey of power line harmonic radiation events observed by the low-altitude DEMETER spacecraft. Altogether, 88 events (45 with frequency spacing 50/100 Hz and 43 with frequency spacing 60/120 Hz) have been found by an automatic identification procedure and confirmed by visual inspection. Frequency-Time intervals of individual lines forming the events have been found by an automated procedure, and the corresponding frequency-time spectrograms have been fitted by a 2d-Gaussian model. It is shown that the mean time duration of the lines forming the events is 20 seconds, with median being 12 seconds (this corresponds to the spatial dimensions of 156/90 km, respectively). The full width at half maximum of the frequency range of the lines is less than 3 Hz in the majority of cases. Moreover, the lines with larger bandwidth and the lines with the largest intensities often occur off exact multiples of base power system frequency. We present results of a systematic survey of power line harmonic radiation events observed by the low-altitude DEMETER spacecraft. Altogether, 88 events (45 with frequency spacing 50/100 Hz and 43 with frequency spacing 60/120 Hz) have been found by an automatic identification procedure and confirmed by visual inspection. Frequency-Time intervals of individual lines forming the events have been found by an automated procedure, and the corresponding frequency-time spectrograms have been fitted by a 2d-Gaussian model. It is shown that the mean time duration of the lines forming the events is 20 seconds, with median being 12 seconds (this corresponds to the spatial dimensions of 156/90 km, respectively). The full width at half maximum of the frequency range of the lines is less than 3 Hz in the majority of cases. Moreover, the lines with larger bandwidth and the lines with the largest intensities often occur off exact multiples of base power system frequency. (en) Systematická studie záření elektrické sítě z dat družice DEMETER. Numerický výpočet útlumu elektromagnetických vln během šíření skrz ionosféru. (cs)
Title	Power line harmonic radiation observed by satellite: Properties and propagation through the ionosphere Power line harmonic radiation observed by satellite: Properties and propagation through the ionosphere (en) Záření elektrické sítě pozorované družicí: vlastnostni a šíření skrz ionosféru (cs)
skos:prefLabel	Power line harmonic radiation observed by satellite: Properties and propagation through the ionosphere Power line harmonic radiation observed by satellite: Properties and propagation through the ionosphere (en) Záření elektrické sítě pozorované družicí: vlastnostni a šíření skrz ionosféru (cs)
skos:notation	RIV/68378289:_____/08:00313125!RIV09-AV0-68378289
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(1P05ME811), P(GA205/06/1267), Z(AV0Z30420517)
http://linked.open...iv/cisloPeriodika	8
http://linked.open...vai/riv/dodaniDat	2009
http://linked.open...aciTvurceVysledku	Santolík, Ondřej Němec, František
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky atmosféry AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	388271
http://linked.open...ai/riv/idVysledku	RIV/68378289:_____/08:00313125
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Power Line Harmonic Radiation; PLHR; penetration through the ionosphere; fullwave; ionosphere (en)
http://linked.open.../riv/klicoveSlovo	ionosphere PLHR Power Line Harmonic Radiation fullwave penetration through the ionosphere
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[08674266EA17]
http://linked.open...i/riv/nazevZdroje	Journal of Geophysical Research
http://linked.open...in/vavai/riv/obor	BL
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Investigation of plasma waves in the magnetosphere Low-frequency wave coupling of the atmosphere, ionosphere, and inner magnetosphere of the Earth
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	113
http://linked.open...iv/tvurceVysledku	Parrot, M. Santolík, Ondřej Bortnik, J. Němec, František
http://linked.open...ain/vavai/riv/wos	000258824700005
http://linked.open...n/vavai/riv/zamer	Studium atmosférického obalu Země v interakci s pozemskými a kosmickými vlivy
issn	0148-0227
number of pages	9 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Power line harmonic radiation observed by satellite: Properties and propagation through the ionosphere Power line harmonic radiation observed by satellite: Properties and propagation through the ionosphere

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