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F2 layer [1 record]
Record 1 - internal organization data 2004-03-19
Record 1, English
Record 1, Subject field(s)
- The Earth (Astronomy)
- Atmospheric Physics
- Space Physics
Record 1, Main entry term, English
- F2 layer
1, record 1, English, F2%20layer
correct, see observation
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
Upper layer of the F region, centred generally at a height of some 300 km. 2, record 1, English, - F2%20layer
Record number: 1, Textual support number: 1 CONT
[The] F2 layer ... provides long-range hf communications. Very variable, [the] height and density [of the F2 layer] change with time of day, season, and sunspot activity. 3, record 1, English, - F2%20layer
Record number: 1, Textual support number: 1 OBS
F2 layer 4, record 1, English, - F2%20layer
Record 1, Key term(s)
- F2-layer
- ionosphere's F2 layer
- ionosphere's F2-layer
- ionospheric F2 layer
- ionospheric F2-layer
Record 1, French
Record 1, Domaine(s)
- Terre (Astronomie)
- Physique de l'atmosphère
- Physique spatiale
Record 1, Main entry term, French
- couche F2
1, record 1, French, couche%20F2
correct, see observation, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Couche supérieure de la région F, centrée généralement à une altitude d'environ 300 km. 2, record 1, French, - couche%20F2
Record number: 1, Textual support number: 1 CONT
La région ionisée principalement responsable des communications à longue distance c'est la couche F. Elle s'ionise au lever du soleil, atteint très rapidement son maximum pour diminuer progressivement au coucher et atteindre son minimum juste avant le lever du jour. Au cours de la journée, la région F se divise en deux : la couche F1 (de 150 à 200 km du sol) [détectable de jour seulement et] la couche F2 (de 250 à 400 km du sol)[. C'] est la première couche qui supporte les communications en haute fréquence. Au cours de la journée, comme nous l'avons vu auparavant, elle est relativement mince étant donné la présence de F1. Par contre, au cours de la nuit, cette couche double ses dimensions, étant directement sous l'influence des rayonnements solaires, elle est très dense et permet des communications à plus de 1500 km en un seul bond. 3, record 1, French, - couche%20F2
Record number: 1, Textual support number: 1 OBS
couche F2 4, record 1, French, - couche%20F2
Record 1, Key term(s)
- couche F2 de l'ionosphère
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Tierra (Astronomía)
- Física de la atmósfera
- Física espacial
Record 1, Main entry term, Spanish
- capa F2
1, record 1, Spanish, capa%20F2
see observation, feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record number: 1, Textual support number: 1 DEF
Capa superior de la región F, centrada generalmente a altitudes próximas a 300 km. 2, record 1, Spanish, - capa%20F2
Record number: 1, Textual support number: 1 OBS
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