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PSEUDO NOISE CODE [1 record]

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Record 1 2002-11-05

English

Subject field(s)
  • Range Measurements (Telecommunications)

French

Domaine(s)
  • Mesures à distance (Télécommunications)
CONT

L'orbite géostationnaire est soumise à de multiples perturbations qui obligent à mesurer régulièrement la distance du satellite aux stations sol. Jusqu'en 1989, ces mesures utilisent les techniques classiques de modulation et mobilisent les deux canaux de diffusion huit fois par jour. Les nouvelles techniques, modulation à bande étalée et code pseudo-aléatoire, permettent d'effectuer les mesures de distance sans avoir à interrompre la mission de diffusion, sa disponibilité devient permanente, le gain obtenu est supérieur à une heure par jour.

Key term(s)
  • code pseudo aléatoire

Spanish

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