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POLAR CAP ABSORPTION EVENT [1 record]
Record 1 - internal organization data 2008-05-23
Record 1, English
Record 1, Subject field(s)
- Radio Waves
- Telecommunications
- Space Physics
Record 1, Main entry term, English
- polar cap absorption event
1, record 1, English, polar%20cap%20absorption%20event
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- PCA event 2, record 1, English, PCA%20event
correct
- polar cap event 3, record 1, English, polar%20cap%20event
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
polar cap absorption events: Episodes of intense absorption of HF and VHF radio waves over the polar caps caused by excess ionization resulting from an influx of solar energetic particles into the upper atmosphere. 2, record 1, English, - polar%20cap%20absorption%20event
Record number: 1, Textual support number: 1 CONT
A polar cap absorption event results from the ionisation of the D-layer of the polar ionosphere by high energy protons. A PCA causes a HF radio blackout for transpolar circuits and can last several days. PCAs are almost always preceded by a major solar flare with the time between the flare event and the onset of the PCA ranging from few minutes to several hours. 4, record 1, English, - polar%20cap%20absorption%20event
Record number: 1, Textual support number: 2 CONT
PCA events have a pronounced diurnal variation, being much more intense during daytime than at night, and typically last for two to three days. 2, record 1, English, - polar%20cap%20absorption%20event
Record 1, French
Record 1, Domaine(s)
- Ondes radioélectriques
- Télécommunications
- Physique spatiale
Record 1, Main entry term, French
- événement d'absorption dans la calotte polaire
1, record 1, French, %C3%A9v%C3%A9nement%20d%27absorption%20dans%20la%20calotte%20polaire
masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- évènement d'ACP 2, record 1, French, %C3%A9v%C3%A8nement%20d%27ACP
masculine noun
- phénomène d'absorption localisé à la calotte polaire 3, record 1, French, ph%C3%A9nom%C3%A8ne%20d%27absorption%20localis%C3%A9%20%C3%A0%20la%20calotte%20polaire
masculine noun
- phénomène d'absorption dans la calotte polaire 4, record 1, French, ph%C3%A9nom%C3%A8ne%20d%27absorption%20dans%20la%20calotte%20polaire
masculine noun
- évènement d'absorption dans la calotte polaire 5, record 1, French, %C3%A9v%C3%A8nement%20d%27absorption%20dans%20la%20calotte%20polaire
masculine noun
- événement d'ACP 5, record 1, French, %C3%A9v%C3%A9nement%20d%27ACP
masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
[...] événements associés à des particules puissantes provenant du Soleil [lesquelles] produisent une ionisation intense dans la région D (between 50 and 90 km altitude) de l'ionosphère au-dessus des calottes polaires. 1, record 1, French, - %C3%A9v%C3%A9nement%20d%27absorption%20dans%20la%20calotte%20polaire
Record number: 1, Textual support number: 1 CONT
[Les] événements d'absorption dans la calotte polaire [sont appelés ainsi] parce que l'ionisation accrue [dans la région D] absorbe les ondes radio HF et VHF. Les événements d'absorption dans la calotte polaire peuvent être étudiés à l'aide de riomètres. 1, record 1, French, - %C3%A9v%C3%A9nement%20d%27absorption%20dans%20la%20calotte%20polaire
Record number: 1, Textual support number: 2 CONT
Il est souvent impossible d'établir des radiocommunications à haute fréquence pendant la durée des évènements d'ACP. 2, record 1, French, - %C3%A9v%C3%A9nement%20d%27absorption%20dans%20la%20calotte%20polaire
Record number: 1, Textual support number: 1 OBS
évènement : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2004). 5, record 1, French, - %C3%A9v%C3%A9nement%20d%27absorption%20dans%20la%20calotte%20polaire
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Ondas radioeléctricas
- Telecomunicaciones
- Física espacial
Record 1, Main entry term, Spanish
- efecto de absorción en el casquete polar
1, record 1, Spanish, efecto%20de%20absorci%C3%B3n%20en%20el%20casquete%20polar
masculine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
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