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EQUATORIAL CIRCULAR ORBIT [2 records]

Record 1 2004-03-26

English

Subject field(s)
  • Spacecraft
  • Launching and Space Maneuvering
OBS

Classification of satellite orbits : 1. Type of orbit :Circular(with centre of the circle at the centre of the earth), Elliptical(with the earth's centre as one of the two foci of the ellipse). 2. Plane of orbit :Equatorial orbit(directly above the earth's equator), Polar orbit(passes over both poles). Inclined orbits(any other orbit). 3. Altitude of the communications satellite : GEO(geostationary orbit), MEO(medium earth orbit), LEO(low earth orbit).

French

Domaine(s)
  • Engins spatiaux
  • Lancement et manœuvres dans l'espace
CONT

Tous les satellites de télécommunication (transmission de données, d'images et de sons) sont placés sur une orbite circulaire équatoriale. La raison en est simple : ainsi placés, ils peuvent facilement «arroser» différentes zones du globe et relayer des données provenant de deux points très éloignés. C'est cette localisation équatoriale qui explique l'orientation au sud d'une antenne parabolique installée depuis la France et plus globalement l'hémisphère nord.

Spanish

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Record 2 1985-02-04

English

Subject field(s)
  • Facilities and Instruments (Astronomy)
  • Astrophysics and Cosmography
CONT

The proposed mission would study these [X-ray] phenomena with four instruments : a large-area proportional counter, a phoswich detector, a four-component all-sky wide-field camera array and a gamma-burst detector. The instruments will be mounted on a free-flying spacecraft placed in a low altitude(600 km) circular equatorial orbit.

French

Domaine(s)
  • Installations et instruments (Astronomie)
  • Astrophysique et cosmographie

Spanish

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