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D-REGION [1 record]

Record 1 2002-04-18

English

Subject field(s)
  • Atmospheric Physics
  • Geophysics
DEF

That part of the ionosphere in which the D layer tends to form.

CONT

D region [is] a daytime layer of the earth's ionosphere approximately 50 to 90 km in altitude.

CONT

D Region [is] the lowest layer of the ionosphere extending from approximately 60-85 km and dominated by NO+ ions generated by absorption of Lyman-Alpha radiation. The D Region disappears at night.

Key term(s)
  • ionosphere D region
  • ionospheric D-region
  • ionospheric D region
  • ionosphere's D region

French

Domaine(s)
  • Physique de l'atmosphère
  • Géophysique
DEF

Région de l'ionosphère dans laquelle la couche D tend à se former.

CONT

La partie sous-jacente de l'ionosphère faisant interface avec l'atmosphère neutre est connue sous le nom de région D. S'étendant dans la tranche altimétrique allant de 50 à 90 km, elle se confond avec la mésosphère des aéronomistes. Depuis trois ans, [...] une station [astro-géophysique] effectue des sondages passifs de la région D en enregistrant le niveau et la phase de signaux transmis par des émetteurs de signaux horaires.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
  • Geofísica
DEF

Parte de la ionosfera en que tiende a formarse la capa D.

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