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ELLIPSOIDE REVOLUTION [6 records]

Record 1 2013-01-11

English

Subject field(s)
  • Cartography
  • Mathematical Geography
DEF

A theoretical figure whose dimensions closely approach the dimensions of the geoid; the exact dimensions are determined by various considerations of the section of the earth's surface concerned.

French

Domaine(s)
  • Cartographie
  • Géographie mathématique
DEF

Ellipsoïde de révolution aplati, d’axe parallèle à la ligne des pôles terrestres, de grand axe et d’excentricité choisis de telle sorte que ses normales coïncident convenablement en moyenne avec les verticales sur toute la zone qu'on se propose d’utiliser.

Spanish

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Record 2 2013-01-11

English

Subject field(s)
  • Cartography
  • Mathematical Geography
DEF

... a geometric surface produced by rotating an ellipse about one of its two axes and having circular plane surfaces perpendicular to the axis of revolution.

French

Domaine(s)
  • Cartographie
  • Géographie mathématique
DEF

Solide engendré par une ellipse tournant autour d’un de ses axes [...]

Spanish

Save record 2

Record 3 2012-05-04

English

Subject field(s)
  • Astronomy
  • Mathematical Geography
  • Geophysics
DEF

The angle between the geodetic meridian and the tangent to the geodesic at the observer, measured in the plane perpendicular to the ellipsoidal normal of the observer, preferably clockwise from south.

French

Domaine(s)
  • Astronomie
  • Géographie mathématique
  • Géophysique
DEF

Angle dièdre formé par les demi-plans limités par la normale à l'ellipsoïde passant par le point de station et contenant respectivement la direction considérée et l'axe de révolution de l'ellipsoïde.

Spanish

Campo(s) temático(s)
  • Astronomía
  • Geografía matemática
  • Geofísica
DEF

Acimut definido por el meridiano geodésico y el vertical geodésico del punto que se considera.

Save record 3

Record 4 2009-03-13

English

Subject field(s)
  • Theoretical Astronomy
  • The Moon (Astronomy)
CONT

The moon's diameter is about 2,160 mi (3,476 km) at the moon's equator, somewhat more than 1-4 the earth's diameter.

Key term(s)
  • Moon's equator

French

Domaine(s)
  • Astronomie théorique
  • Lune (Astronomie)
CONT

Les mesures seront meilleures près de l’équateur lunaire.

OBS

Équateur d’un astre : Grand cercle de la surface d’un astre, considéré comme un ellipsoïde de révolution, perpendiculaire à son axe de rotation.

Spanish

Save record 4

Record 5 2002-11-27

English

Subject field(s)
  • Astrophysics and Cosmography
  • Geophysics
  • Descriptive Geometry
  • Flight Instruments and Equipment (Aeroindustry)
DEF

The surface or ellipsoid generated by rotating an ellipse about one of its axes so that the diameter of its equatorial circle exceeds the length of the axis of revolution.

CONT

Alignment of Inertial Platforms... The distance of the platform from the center of the earth is computed using latitude in an equation which defines the surface of the earth as an oblate spheroid. The origin of the platform coordinate set relative to the center of the earth is thus completely specified by the values of latitude and longitude entered at the start of the alignment.

French

Domaine(s)
  • Astrophysique et cosmographie
  • Géophysique
  • Géométrie descriptive
  • Instruments et équipement de bord (Constructions aéronautiques)
DEF

Ellipsoïde de révolution engendré par la rotation d’une ellipse autour de son petit axe.

CONT

Au XVIIe siècle, Newton et Huygens, en étudiant la période d’un pendule à Paris et à Cayenne, émirent l’opinion que la Terre est un ellipsoïde aplati.

Spanish

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Record 6 1981-03-24

English

Subject field(s)
  • Analytical Geometry
  • Mathematics
CONT

An ellipsoid of revolution (or spheroid) is an ellipsoid generated by revolving an ellipse about one of its axes (...). This is an ellipsoid whose sections by planes perpendicular to one of its axes are all circles.The axis passing through the centers of these circular sections is the axis of revolution.

French

Domaine(s)
  • Géométrie analytique
  • Mathématiques
CONT

Surface de révolution. - Surface engendrée par une courbe, appelée directrice, tournant autour d’une droite fixe appelée axe de révolution.

CONT

Le lieu des points R est un ellipsoïde de foyers A et B, d’axe de révolution AB et centré au point S milieu de AB.

Spanish

Save record 6

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