TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

... any one of a number of asteroids that occupy a stable Lagrangian point in a planet's orbit around the Sun.  3, record 1, English, - Trojan%20asteroid

Record number: 1, Textual support number: 1 OBS

In theory, any planet can have Trojan asteroids, but in practice the powerful gravitational pull of Jupiter means that it absolutely dominates the Trojan population.  4, record 1, English, - Trojan%20asteroid

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Les troyens représentent une classe d'astéroïdes qui partagent la même orbite qu'une planète, ils se situent juste devant ou juste derrière elle. Ils ne risquent cependant pas d'entrer en collision avec l'astre qu'ils précèdent ou poursuivent, car leurs orbites sont considérées comme stables.  1, record 1, French, - ast%C3%A9ro%C3%AFde%20troyen

Record number: 1, Textual support number: 1 OBS

La majorité des astéroïdes troyens se trouvent sur l'orbite de Jupiter.  2, record 1, French, - ast%C3%A9ro%C3%AFde%20troyen

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

… a full moon occurring near or at the time when the Moon is at the closest point in its orbit around Earth.  1, record 2, English, - perigean%20full%20moon

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

La Lune est apparue légèrement plus grosse et plus brillante que d'habitude durant la nuit de mardi à mercredi. Ceux qui ont levé les yeux vers le ciel pouvaient ainsi observer une superlune. Ce terme est utilisé pour décrire une pleine lune à son périgée, c'est-à-dire quand elle est à sa plus petite distance de la Terre.  3, record 2, French, - pleine%20lune%20p%C3%A9rig%C3%A9enne

Record number: 2, Textual support number: 1 OBS

Le phénomène de superlune [...] se produit en moyenne de quatre à six fois par an.  3, record 2, French, - pleine%20lune%20p%C3%A9rig%C3%A9enne

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A geographically or electronically defined location used in stationing aircraft in flight during tactical operations when predetermined pattern is not established.  1, record 3, English, - orbit%20point

Record number: 3, Textual support number: 1 OBS

orbit point : designation and definition standardized by NATO.  2, record 3, English, - orbit%20point

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Point de référence défini géographiquement ou électroniquement utilisé pour mettre en attente des aéronefs en vol dans les opérations tactiques lorsqu'un circuit prédéterminé n'a pas été prévu.  2, record 3, French, - point%20d%27orbite

Record number: 3, Textual support number: 1 OBS

point d'orbite : désignation et définition normalisées par l'OTAN.  2, record 3, French, - point%20d%27orbite

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 DEF

Posición definida geográfica o electrónicamente que se emplea para situar las aeronaves en vuelo durante las operaciones tácticas cuando no se ha previsto un tipo de vuelo determinado.  1, record 3, Spanish, - punto%20de%20%C3%B3rbita

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The Zarya control module, also known by the technical term Functional Cargo Block and the Russian acronym FGB, was the first component launched for the International Space Station and provides the station's initial propulsion and power.... The U. S.-funded and Russian-built Zarya, which means Sunrise when translated to English, is a U. S. component of the station although it was built and launched by Russia.... The Zarya module is 41. 2 feet long and 13. 5 feet wide at its widest point. It has an operational lifetime of at least 15 years. Its solar arrays and six nickel-cadmium batteries can provide an average of 3 kilowatts of electrical power. Using the Russian Kurs system, the Zarya will perform an automated and remotely piloted rendezvous and docking with the Service Module in orbit. Its docking power will accommodate Russian Soyuz piloted spacecraft and unpiloted Progress resupply spacecraft. Each of the two solar arrays is 35 feet long and 11 feet wide. The module's 16 fuel tanks combined can hold more than 6 tons of propellant. The attitude control system for the module includes 24 large steering jets and 12 small steering jets. Two large engines are available for reboosting the spacecraft and making major orbital changes.  6, record 4, English, - Zarya%20control%20module

Record number: 4, Textual support number: 2 CONT

The Zarya module now provides orientation control, communications and electrical power attached to the passive Unity module while the station awaits launch of the third component, a Russian-provided crew living quarters and early station core known as the Service Module ... The Service Module will enhance or replace many functions of the Zarya. Later in the station’s assembly sequence, the Zarya module will be used primarily for its storage capacity and external fuel tanks.  6, record 4, English, - Zarya%20control%20module

Record number: 4, Textual support number: 1 OBS

Zarya control module; FGB: term and abbreviation officially approved by the International Space Station official approval Group (ISSOAG).  7, record 4, English, - Zarya%20control%20module

Record number: 4, Textual support number: 1 PHR

Zarya -Y nadir port  7, record 4, English, - Zarya%20control%20module

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

[...] Zarya [«lever de soleil»] est un remorqueur, un véhicule orbital autonome qui contient les systèmes initiaux de propulsion, de guidage, d'orientation, de communications, d'alimentation électrique et de thermorégulation nécessaires au maintien de la Station spatiale internationale pendant ses premiers mois dans l'espace. Au fil des mois, le module Zarya est devenu ni plus ni moins qu'un couloir menant la station, un port d'amarrage et un réservoir de carburant. Construit par la Russie dans le cadre d'un marché américain, Zarya appartient aux États-Unis.  2, record 4, French, - module%20de%20contr%C3%B4le%20Zarya

Record number: 4, Textual support number: 2 CONT

Le module russe Zarya et le nœud américain Unity sont reliés par l'Adaptateur 1 [...] Ce module, jadis appelé FGB, est la salle des machines de la station et assure les fonctions de propulsion, d'alimentation électrique et d'orientation du futur complexe spatial.  9, record 4, French, - module%20de%20contr%C3%B4le%20Zarya

Record number: 4, Textual support number: 1 OBS

module de contrôle Zarya; FGB : terme et abréviation uniformisés par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).  2, record 4, French, - module%20de%20contr%C3%B4le%20Zarya

Record number: 4, Textual support number: 1 PHR

système de photopiles du module russe Zarya  2, record 4, French, - module%20de%20contr%C3%B4le%20Zarya

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

The argument of pericenter, for example, is defined as follows. There is a line through space which is fixed by convention as a reference. If one body orbits another(for instance the Moon orbiting around the Earth) the argument of pericenter associated with this orbit is the angle in the plane of the orbit between the reference line and the closest point of the orbit to the focus. The angle described above is measured from the focus of the orbit and in the direction which the object orbits.  5, record 5, English, - argument%20of%20pericenter

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Angle ayant pour sommet le centre de masse du corps principal et dont les côtés passent respectivement par le nœud ascendant et le périastre.  3, record 5, French, - argument%20du%20p%C3%A9riastre

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

The point in the orbit where the spacecraft crosses the equatorial plane moving from the northern hemisphere to the southern hemisphere.  2, record 6, English, - descending%20node

Record number: 6, Textual support number: 1 OBS

descending node: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, record 6, English, - descending%20node

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

[...] endroit où la projection de l'orbite sur le globe terrestre coupe le plan de l'équateur [dans le sens nord-sud].  2, record 6, French, - n%26oelig%3Bud%20descendant

Record number: 6, Textual support number: 1 OBS

Il existe pour chaque orbite un nœud ascendant et un nœud descendant. [...] Ces deux références sont généralement exprimées en degrés par rapport au méridien de Greenwich.  2, record 6, French, - n%26oelig%3Bud%20descendant

Record number: 6, Textual support number: 2 OBS

noeud descendant : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  3, record 6, French, - n%26oelig%3Bud%20descendant

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

The angle or arc from the ascending node to the closest approach of the orbiting body to the focus or perigee point, as measured at the focus of an elliptical orbit, in the orbital plane in the direction of motion of the orbiting body.  1, record 7, English, - argument%20of%20perigee

Record number: 7, Textual support number: 1 OBS

argument of perigee: term and definition provided by the Canadian Hydrographic Service.  1, record 7, English, - argument%20of%20perigee

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

L'arc ou l'angle entre le nœud ascendant et le point d'approche minimale du foyer, ou périgée, d'un satellite tel que mesuré au foyer d'une orbite elliptique dans le plan de l'orbite et dans la direction du déplacement du satellite.  1, record 7, French, - argument%20de%20p%C3%A9rig%C3%A9e

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

A manoeuvre by which a spacecraft is taken out of orbit around a celestial body in order to land it on given point of the body's surfaces, or to crash it.  9, record 8, English, - deorbiting

Record number: 8, Textual support number: 1 OBS

deorbiting; deorbitation; deorbit manoeuvre: terms officially approved by the RADARSAT-2 Terminology Approval Group (RTAG) and by the International Space Station Official Approval Group (ISSOAG).  5, record 8, English, - deorbiting

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Manœuvre consistant à éjecter un engin spatial de l'orbite qu'il décrit autour d'un astre pour l'amener à s'y poser, en un point donné, ou pour en provoquer l'écrasement.  5, record 8, French, - d%C3%A9sorbitation

Record number: 8, Textual support number: 1 OBS

désorbitation; désatellisation : termes uniformisés par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR); manoeuvre de désorbitation : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).  5, record 8, French, - d%C3%A9sorbitation

Record number: 8, Textual support number: 1 PHR

amorcer la désorbitation  5, record 8, French, - d%C3%A9sorbitation

Record number: 8, Textual support number: 2 PHR

phase de désorbitation  5, record 8, French, - d%C3%A9sorbitation

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 DEF

The point nearest to the Earth on the apse line of a central orbit having the Earth as a focus.  2, record 9, English, - perigee

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 DEF

Point de l'orbite d'un satellite le plus proche du centre de la Terre.  2, record 9, French, - p%C3%A9rig%C3%A9e

Record 9,  Textual support,  Spanish

Record number: 9, Textual support number: 1 DEF

Punto de la órbita de un astro más cercano a la Tierra.  2, record 9, Spanish, - perigeo

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 DEF

The point at which a spacecraft in lunar orbit is nearest to the moon...  3, record 10, English, - perilune

Record number: 10, Textual support number: 1 OBS

... according to some, ... ’-lune’ [is reserved] for an object launched from the moon and ’-cynthion’ for an object launched from elsewhere.  2, record 10, English, - perilune

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 DEF

Point de l'orbite d’un satellite de la lune le plus proche du centre de celle-ci.  1, record 10, French, - p%C3%A9rilune

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 DEF

The point in the moon's orbit which is closest to the Earth.  1, record 11, English, - lunar%20perigee

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 DEF

Point de l'orbite de la lune où celle-ci est le plus proche de la Terre.  1, record 11, French, - p%C3%A9rig%C3%A9e%20lunaire

Record 11,  Textual support,  Spanish

Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 DEF

The point in the moon's orbit that is farthest from the Earth.  1, record 12, English, - lunar%20apogee

Record 12,  Textual support,  French

Record number: 12, Textual support number: 1 DEF

Point de l'orbite de la lune où celle-ci est le plus loin de la Terre.  1, record 12, French, - apog%C3%A9e%20lunaire

Record 12,  Textual support,  Spanish

Record 13,  Textual support,  English

Record number: 13, Textual support number: 1 DEF

A horizontal plane represented in profile by a line between the lowest point on the margin of the orbit and the highest point on the margin of the auditory meatus.  1, record 13, English, - Frankfort%20horizontal%20plane

Record 13,  Textual support,  French

Record number: 13, Textual support number: 1 DEF

Plan horizontal d'orientation du crâne, qui est déterminé par les bords supérieurs des trous auditifs externes (porions) et les points déclives des rebords orbitaires (points orbitaires).  1, record 13, French, - plan%20orbito%2Dauditif

Record 13,  Textual support,  Spanish

Record 14,  Textual support,  English

Record number: 14, Textual support number: 1 DEF

That point in an orbit at which the moon or an artificial satellite is most distant from the earth; the term is sometimes loosely applied to positions of satellites of other planets.  2, record 14, English, - apogee

Record number: 14, Textual support number: 1 CONT

Viewed from above the north pole of the Earth, the moon travels counter-clockwise in a slightly elliptical path around the Earth ... at farthest distance (apogee) it is 406,697 km away.  3, record 14, English, - apogee

Record 14,  Textual support,  French

Record number: 14, Textual support number: 1 DEF

Position occupée par un astre (ou un satellite artificiel) au cours de sa révolution autour de la Terre lorsque sa distance par rapport à la Terre est maximale (s'oppose à périgée).  2, record 14, French, - apog%C3%A9e

Record number: 14, Textual support number: 1 CONT

À l'autre extrémité du même axe, où à l'apogée, la distance est au contraire maximum et le diamètre apparent est le plus petit.  3, record 14, French, - apog%C3%A9e

Record 14,  Textual support,  Spanish

Record number: 14, Textual support number: 1 DEF

Punto en la órbita de un cuerpo celeste más alejado de la tierra.  2, record 14, Spanish, - apogeo

Record 15,  Textual support,  English

Record number: 15, Textual support number: 1 DEF

The point of a planet's or comet's orbit most distant from the sun.  2, record 15, English, - aphelion

Record number: 15, Textual support number: 1 OBS

aphelion: ... opposed to perihelion.  2, record 15, English, - aphelion

Record number: 15, Textual support number: 2 OBS

Plural form: aphelia.  2, record 15, English, - aphelion

Record 15,  Textual support,  French

Record number: 15, Textual support number: 1 DEF

Point de l'orbite d'une planète, ou d'une comète, qui est le plus éloigné du Soleil.  2, record 15, French, - aph%C3%A9lie

Record 15,  Textual support,  Spanish

Record number: 15, Textual support number: 1 DEF

Momento en el que la órbita de un planeta está en el punto más alejado del sol.  1, record 15, Spanish, - afelio

Record 16,  Textual support,  English

Record number: 16, Textual support number: 1 DEF

That point in a geocentric orbit when the geometric distance is at a minimum.  2, record 16, English, - perigee

Record number: 16, Textual support number: 1 OBS

The closest approach of a body.  2, record 16, English, - perigee

Record number: 16, Textual support number: 2 OBS

perigee: term and definition provided by the Canadian Hydrographic Service.  2, record 16, English, - perigee

Record number: 16, Textual support number: 3 OBS

perigee: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, record 16, English, - perigee

Record 16,  Textual support,  French

Record number: 16, Textual support number: 1 DEF

Point d'une orbite géocentrique où la distance géométrique à l'objet en orbite est minimale.  2, record 16, French, - p%C3%A9rig%C3%A9e

Record number: 16, Textual support number: 1 OBS

Point d'approche minimale d'un corps.  2, record 16, French, - p%C3%A9rig%C3%A9e

Record number: 16, Textual support number: 2 OBS

périgée : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  3, record 16, French, - p%C3%A9rig%C3%A9e

Record 16,  Textual support,  Spanish

Record 17,  Textual support,  English

Record number: 17, Textual support number: 1 DEF

A rocket motor fired at the perigee(low point) of an orbit to establish a more elliptical one; the new orbit [having] the same perigee as the old, but a higher apogee.  6, record 17, English, - perigee%20motor

Record 17,  Textual support,  French

Record number: 17, Textual support number: 1 DEF

Propulseur équipant un satellite, dont la mise en fonctionnement au voisinage du périgée communique à celui-ci une impulsion destinée à élever son apogée.  2, record 17, French, - moteur%20de%20p%C3%A9rig%C3%A9e

Record 17,  Textual support,  Spanish

Record 18,  Textual support,  English

Record number: 18, Textual support number: 1 DEF

The velocity at which a space vehicle is moving when some part or section is separated from it.  2, record 18, English, - separation%20velocity

Record number: 18, Textual support number: 1 CONT

When the spin table rpm has been verified and the proper point in the parking orbit has been reached, redundant, debris-free, explosive bolt cutters are fired upon command from the electrical ASE(airborne support equipment) to separate the band clamp(which is mechanically retained on the spin table), and the springs provide the thrust to attain a separation velocity of approximately 3 feet per second.  3, record 18, English, - separation%20velocity

Record 18,  Textual support,  French

Record number: 18, Textual support number: 1 CONT

Ces deux parties sont reliées par un dispositif pyrotechnique et des ressorts montés à l'intérieur de la partie inférieure pour imprimer une vitesse de séparation à la partie supérieure.  2, record 18, French, - vitesse%20de%20s%C3%A9paration

Record 18,  Textual support,  Spanish

Record 19,  Textual support,  English

Record number: 19, Textual support number: 1 DEF

... the speed of a satellite in orbit around a planet.  2, record 19, English, - orbital%20speed

Record number: 19, Textual support number: 1 CONT

The orbital speed of a body, generally a planet, a natural satellite, an artificial satellite, or a multiple star, is the speed at which it orbits around the barycenter of a system, usually around a more massive body. It can be used to refer to either the mean orbital speed, the average speed as it completes an orbit, or instantaneous orbital speed, the speed at a particular point in its orbit.  1, record 19, English, - orbital%20speed

Record 19,  Textual support,  French

Record number: 19, Textual support number: 1 CONT

La vitesse orbitale d'un corps céleste, le plus souvent une planète, un satellite naturel, un satellite artificiel ou une étoile binaire, est la vitesse à laquelle il orbite autour du barycentre d'un système à deux corps, soit donc le plus souvent autour d'un corps plus massif. L'expression peut être employée pour désigner la vitesse orbitale moyenne du corps le long de son orbite ou la vitesse orbitale instantanée, en un point précis de cette orbite.  2, record 19, French, - vitesse%20orbitale

Record 19,  Textual support,  Spanish

Record 20,  Textual support,  English

Record number: 20, Textual support number: 1 DEF

The point in the orbit of a satellite or planet which is at a maximum distance from the centre of mass of the primary body.  4, record 20, English, - apoastron

Record 20,  Textual support,  French

Record number: 20, Textual support number: 1 DEF

Point de l'orbite d'un satellite ou d'une planète situé à un maximum de distance du centre de gravité du corps principal.  3, record 20, French, - apoastre

Record number: 20, Textual support number: 1 CONT

L'apoastre d'une orbite autour de la Terre s'appelle apogée, celui d'une orbite autour du Soleil, aphélie.  4, record 20, French, - apoastre

Record 20,  Textual support,  Spanish

Record 21,  Textual support,  English

Record number: 21, Textual support number: 1 DEF

The point in the orbit of a satellite or planet which is at a minimum distance from the centre of mass of the primary body.  2, record 21, English, - periastron

Record 21,  Textual support,  French

Record number: 21, Textual support number: 1 DEF

Point de l'orbite d'un objet céleste gravitant autour d'un axe pour lequel la distance des deux corps est minimale.  2, record 21, French, - p%C3%A9riastre

Record 21,  Textual support,  Spanish

Record 22,  Textual support,  English

Record number: 22, Textual support number: 1 CONT

Some future satellite programs will employ the gravity gradient orientation or stabilization system, which makes use of the fact that... a long body in orbit will always point toward the center of the Earth.  1, record 22, English, - gravity%20gradient

Record 22,  Textual support,  French

Record number: 22, Textual support number: 1 CONT

Le gradient de gravité a pour origine l'attraction différentielle qui s'exerce sur des masses situées à des distances différentes du centre de la Terre.  2, record 22, French, - gradient%20de%20gravit%C3%A9

Record 22,  Textual support,  Spanish

Record 23,  Textual support,  English

Record number: 23, Textual support number: 1 CONT

The local orbital reference system is defined at each point of the orbit by three unit vectors. These vectors are derived from the satellite position and velocity vectors : Vector L is colinear with position vector P(on the axis between the Earth's centre and the satellite). It defines the yaw axis. Vector T is perpendicular to the orbital plane(vector L, vector V). It defines the pitch axis. Vector R completes the set of orthogonal axes. It lies in the plane defined by Vectors L and V and defines the roll axis. It does not coincide exactly with the velocity vector due to the eccentricity of the orbit.  3, record 23, English, - roll%20axis

Record number: 23, Textual support number: 2 CONT

Spacecraft axes. The three orthogonal axes of rotation : roll, pitch and yaw. If the spacecraft has a recognisable longitudinal axis or a specified forward direction of flight, the axes are analogous to those of an aircraft, where the roll axis is the longitudinal axis; the pitch axis is in the plane of the wings; and the yaw axis is the "vertical" axis, orthogonal to both the roll and pitch axes. The axes are mutually perpendicular, with an "origin" at the vehicle's centre of mass. For a winged spacecraft such as a Space Shuttle, the similarity with an aircraft is obvious. For expendable launch vehicles the roll axis is the axis which is vertical at launch and the other axes are more-or-less arbitrarily assigned since the vehicle rotates about the roll axis in flight.... The axes of a cylindrical spacecraft(e. g. Apollo, Suyuz, etc.) are similar to those of an ELV [Expendable Launch Vehicle] at launch, but one orbit assume the axis-definition of an aircraft(i. e. defined relative to the pilot's seat). The axes of a satellite mirror those of an aircraft "flying along the orbital arc" : the roll axis is aligned with the direction of travel; the yaw axis passes through the sub-satellite point; and the pitch axis is orthogonal to the other two. For a satellite in an equatorial orbit, the pitch axis is aligned approximately with the Earth's spin axis. The pitch axis is also the spin axis for the spin-stabilised satellite.  4, record 23, English, - roll%20axis

Record number: 23, Textual support number: 1 OBS

In the compilation of engineering drawings the three orthogonal axes are often labelled in Cartesian fashion: x=roll, y=pitch, z=yaw. For the three-axis stabilised spacecraft, the x-axis and y-axis are otherwise known as the east-west and north-south axes, respectively; the z-axis passes through the sub-satellite point. This leads to the definition of the box-shaped satellite’s faces as follows: the "plus-x face" faces east; the "minus-x face" faces west; +y faces south; -y faces north; +z is the Earth-pointing face; and -z is the "anti-Earth face."  4, record 23, English, - roll%20axis

Record number: 23, Textual support number: 2 OBS

roll axis; axis of roll: terms officially approved by the International Space Station official approval Group (ISSOAG) and by the RADARSAT-2 Terminology Approval Group (RTAG).  5, record 23, English, - roll%20axis

Record 23,  Textual support,  French

Record number: 23, Textual support number: 1 CONT

Le repère orbital local est défini en chaque point de l'orbite par les trois vecteurs unitaires. Ces vecteurs sont construits à partir du vecteur position et du vecteur vitesse du satellite : le vecteur L est colinéaire au vecteur position P (sur l'axe centre Terre, satellite). Il définit l'axe de lacet. Le vecteur T est perpendiculaire au plan de l'orbite (vecteur L, vecteur V). Il définit l'axe de tangage. Le vecteur R complète le trièdre. Il appartient au plan (vecteur L, vecteur V) et définit l'axe de roulis. Il ne coïncide pas exactement avec le vecteur vitesse à cause de l'excentricité de l'orbite.  1, record 23, French, - axe%20de%20roulis

Record number: 23, Textual support number: 1 OBS

axe de roulis : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI) et par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  2, record 23, French, - axe%20de%20roulis

Record 23,  Textual support,  Spanish

Record 24,  Textual support,  English

Record number: 24, Textual support number: 1 DEF

An imaginary curved line created on the ground by a series of connected subsatellite points.  4, record 24, English, - ground%20track

Record number: 24, Textual support number: 1 OBS

The inclination of a satellite, together with its orbital altitude and the period of its orbit, creates a track defined by an imaginary line connecting the satellite and the Earth's center. The intersection on the line with the Earth's surface is the subsatellite point. As the Earth turns on its axis and the satellite orbits overhead, a line is created by the satellite's apparent path over the ground(the series of subsatellite points connected). A geostationary satellite has an inclination of essentially zero, and, because its orbital period exactly matches the Earth's rotation, its ground track is reduced to an apparent stationary point on the equator.  5, record 24, English, - ground%20track

Record number: 24, Textual support number: 2 OBS

ground track: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  6, record 24, English, - ground%20track

Record 24,  Textual support,  French

Record number: 24, Textual support number: 1 DEF

Projection au sol suivant la direction géocentrique, ou par extension planétocentrique, de la courbe décrite par le centre de masse d'un véhicule aérien ou spatial.  4, record 24, French, - trace%20au%20sol

Record number: 24, Textual support number: 1 CONT

Les écarts d'orbite d'Envisat ne devraient pas engendrer d'écarts supérieurs à +/- 1 km par rapport à la trace au sol de référence.  5, record 24, French, - trace%20au%20sol

Record number: 24, Textual support number: 1 OBS

trace au sol : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  6, record 24, French, - trace%20au%20sol

Record 24,  Textual support,  Spanish

Record number: 24, Textual support number: 1 DEF

Proyección vertical de la trayectoria real de un vehículo aéreo o espacial sobre la superficie de la Tierra o de otro cuerpo.  1, record 24, Spanish, - trayectoria%20proyectada

Record 25,  Textual support,  English

Record number: 25, Textual support number: 1 CONT

The local orbital reference system is defined at each point of the orbit by three unit vectors. These vectors are derived from the satellite position and velocity vectors : Vector L is colinear with position vector P(on the axis between the Earth's centre and the satellite). It defines the yaw axis. Vector T is perpendicular to the orbital plane(vector L, vector V). It defines the pitch axis. Vector R completes the set of orthogonal axes. It lies in the plane defined by Vectors L and V and defines the roll axis. It does not coincide exactly with the velocity vector due to the eccentricity of the orbit.  2, record 25, English, - pitch%20axis

Record number: 25, Textual support number: 2 CONT

Spacecraft axes. The three orthogonal axes of rotation : roll, pitch and yaw. If the spacecraft has a recognisable longitudinal axis or a specified forward direction of flight, the axes are analogous to those of an aircraft, where the roll axis is the longitudinal axis; the pitch axis is in the plane of the wings; and the yaw axis is the "vertical" axis, orthogonal to both the roll and pitch axes. The axes are mutually perpendicular, with an "origin" at the vehicle's centre of mass. For a winged spacecraft such as a Space Shuttle, the similarity with an aircraft is obvious. For expendable launch vehicles the roll axis is the axis which is vertical at launch and the other axes are more-or-less arbitrarily assigned since the vehicle rotates about the roll axis in flight.... The axes of a cylindrical spacecraft(e. g. Apollo, Suyuz, etc.) are similar to those of an ELV [Expendable Launch Vehicle] at launch, but one orbit assume the axis-definition of an aircraft(i. e. defined relative to the pilot's seat). The axes of a satellite mirror those of an aircraft "flying along the orbital arc" : the roll axis is aligned with the direction of travel; the yaw axis passes through the sub-satellite point; and the pitch axis is orthogonal to the other two. For a satellite in an equatorial orbit, the pitch axis is aligned approximately with the Earth's spin axis. The pitch axis is also the spin axis for the spin-stabilised satellite.  3, record 25, English, - pitch%20axis

Record number: 25, Textual support number: 1 OBS

In the compilation of engineering drawings the three orthogonal axes are often labelled in Cartesian fashion: x=roll, y=pitch, z=yaw. For the three-axis stabilised spacecraft, the x-axis and y-axis are otherwise known as the east-west and north-south axes, respectively; the z-axis passes through the sub-satellite point. This leads to the definition of the box-shaped satellite’s faces as follows: the "plus-x face" faces east; the "minus-x face" faces west; +y faces south; -y faces north; +z is the Earth-pointing face; and -z is the "anti-Earth face."  3, record 25, English, - pitch%20axis

Record number: 25, Textual support number: 2 OBS

pitch axis: term officially approved by the International Space Station official approval Group (ISSOAG) and by the RADARSAT-2 Terminology Approval Group (RTAG).  4, record 25, English, - pitch%20axis

Record 25,  Textual support,  French

Record number: 25, Textual support number: 1 CONT

Le repère orbital local est défini en chaque point de l'orbite par les trois vecteurs unitaires. Ces vecteurs sont construits à partir du vecteur position et du vecteur vitesse du satellite : Le vecteur L est colinéaire au vecteur position P (sur l'axe centre Terre, satellite). Il définit l'axe de lacet. Le vecteur T est perpendiculaire au plan de l'orbite (vecteur L, vecteur V). Il définit l'axe de tangage. Le vecteur R complète le trièdre. Il appartient au plan (vecteur L, vecteur V) et définit l'axe de roulis. Il ne coïncide pas exactement avec le vecteur vitesse à cause de l'excentricité de l'orbite.  2, record 25, French, - axe%20de%20tangage

Record number: 25, Textual support number: 1 OBS

axe de tangage : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI) et par le Groupe de travail de la terminologie de RADARSAT-2.  3, record 25, French, - axe%20de%20tangage

Record 25,  Textual support,  Spanish

Record 26,  Textual support,  English

Record number: 26, Textual support number: 1 DEF

The rotation of a vehicle about its vertical (Z) axis, i.e. movement in azimuth.  2, record 26, English, - yaw

Record number: 26, Textual support number: 1 CONT

The local orbital reference system is defined at each point of the orbit by three unit vectors. These vectors are derived from the satellite position and velocity vectors : vector L is colinear with position vector P(on the axis between the Earth's centre and the satellite). It defines the yaw axis. Vector T is perpendicular to the orbital plane(vector L, vector V). It defines the pitch axis. Vector R completes the set of orthogonal axes. It lies in the plane defined by vectors L and V and defines the roll axis. It does not coincide exactly with the velocity vector due to the eccentricity of the orbit.  3, record 26, English, - yaw

Record number: 26, Textual support number: 1 OBS

yaw: term officially approved by the International Space Station Official Approval Group (ISSOAG) and by the RADARSAT-2 Terminology Approval Group (RTAG).  4, record 26, English, - yaw

Record 26,  Textual support,  French

Record number: 26, Textual support number: 1 DEF

Mouvement d'un corps autour d'un axe perpendiculaire aux axes de roulis et de tangage.  2, record 26, French, - lacet

Record number: 26, Textual support number: 1 CONT

Le repère orbital local est défini en chaque point de l'orbite par les trois vecteurs unitaires. Ces vecteurs sont construits à partir du vecteur position et du vecteur vitesse du satellite : Le vecteur L est colinéaire au vecteur position P (sur l'axe centre Terre, satellite). Il définit l'axe de lacet. Le vecteur T est perpendiculaire au plan de l'orbite (vecteur L, vecteur V). Il définit l'axe de tangage. Le vecteur R complète le trièdre. Il appartient au plan (vecteur L, vecteur V) et définit l'axe de roulis. Il ne coïncide pas exactement avec le vecteur vitesse à cause de l'excentricité de l'orbite.  3, record 26, French, - lacet

Record number: 26, Textual support number: 1 OBS

lacet : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI) et par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, record 26, French, - lacet

Record 26,  Textual support,  Spanish

Record 27,  Textual support,  English

Record number: 27, Textual support number: 1 DEF

Polarization in which the wave vector rotates in an elliptical orbit about a point.  2, record 27, English, - elliptical%20polarization

Record number: 27, Textual support number: 1 OBS

elliptical polarization: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, record 27, English, - elliptical%20polarization

Record 27,  Textual support,  French

Record number: 27, Textual support number: 1 DEF

Type de polarisation défini par un vecteur onde qui effectue une rotation elliptique autour d'un point.  2, record 27, French, - polarisation%20elliptique

Record number: 27, Textual support number: 1 OBS

polarisation elliptique : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  2, record 27, French, - polarisation%20elliptique

Record 27,  Textual support,  Spanish

Record number: 27, Textual support number: 1 DEF

Polarización en la cual el vector de onda rota en una órbita elíptica sobre un punto.  1, record 27, Spanish, - polarizaci%C3%B3n%20el%C3%ADptica

Record 28,  Textual support,  English

Record number: 28, Textual support number: 1 DEF

A limited period of time during which the launch of a particular spacecraft may be undertaken.  2, record 28, English, - launch%20window

Record number: 28, Textual support number: 1 CONT

For launches into Earth orbit the main constraints are the desired orbit, the point of injection into that orbit, and the possibility of a collision with other orbiting spacecraft or orbital debris. For launches to interplanetary trajectories, the time of launch is constrained by the relative positions of the planets, at the time of both launch and encounter(i. e. the spacecraft must be aimed at a point in space that the planet will have reached by the time of encounter). A spacecraft launched outside the launch window would require more propellant and/or more time to reach its target.  2, record 28, English, - launch%20window

Record number: 28, Textual support number: 1 OBS

There are also geometric windows (e.g., restrictions in launch azimuth).  3, record 28, English, - launch%20window

Record number: 28, Textual support number: 2 OBS

launch window: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  4, record 28, English, - launch%20window

Record 28,  Textual support,  French

Record number: 28, Textual support number: 1 DEF

Intervalle de temps pendant lequel le lancement [d'un engin spatial] permettant de réaliser une mission donnée peut-être effectué à tout instant.  3, record 28, French, - fen%C3%AAtre%20de%20lancement

Record number: 28, Textual support number: 1 OBS

fenêtre de lancement : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, record 28, French, - fen%C3%AAtre%20de%20lancement

Record 28,  Textual support,  Spanish

Record 29,  Textual support,  English

Record number: 29, Textual support number: 1 CONT

In astronautics and aerospace engineering, the Hohmann transfer orbit is an orbital path that moves a spacecraft from one point to another using a very low amount of energy.  6, record 29, English, - Hohmann%20transfer%20orbit

Record 29,  Textual support,  French

Record number: 29, Textual support number: 1 DEF

Opération consistant à faire passer un engin spatial d'une orbite à une autre orbite coplanaire en suivant une orbite de transfert, avec une dépense d'énergie minimale, par deux impulsions fournies aux extrémités du grand axe de cette orbite de transfert.  5, record 29, French, - orbite%20de%20transfert%20de%20Hohmann

Record number: 29, Textual support number: 1 CONT

L'orbite de transfert de Hohmann est une demi-ellipse képlérienne tangente aux extrémités de son grand axe, à l'orbite de départ et à l'orbite d'arrivée.  5, record 29, French, - orbite%20de%20transfert%20de%20Hohmann

Record 29,  Textual support,  Spanish

Record 30,  Textual support,  English

Record number: 30, Textual support number: 1 CONT

The ISS attitude will vary between +15 degrees and-15 degrees for each roll and yaw axis of LVLH [Local Vertical/Local Horizontal] and between +15 degrees to-20 degrees for the pitch axis... At any point on the ISS non-articulated portion, which means the portion excluding rotating elements such as photovoltaic arrays and Thermal Control System(TCS) radiators, the ISS will provide estimates of the ISS LVLH attitude to an accuracy of 3 degrees per axis(3 sigma) and inertial rates to an accuracy of 0. 01 degrees per second per axis(3 sigma). When controlling to the TEA [Torque Equilibrium Attitude] with non-propulsive effectors, the ISS will maintain attitude stability to 3. 5 degrees per axis per orbit.  2, record 30, English, - ISS%20attitude

Record number: 30, Textual support number: 1 OBS

ISS attitude: term officially approved by the International Space Station official approval Group (ISSOAG).  3, record 30, English, - ISS%20attitude

Record 30,  Textual support,  French

Record number: 30, Textual support number: 1 OBS

attitude de la Station spatiale : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).  2, record 30, French, - attitude%20de%20la%20Station%20spatiale

Record 30,  Textual support,  Spanish

Record 31,  Textual support,  English

Record number: 31, Textual support number: 1 CONT

this point, termed the radiant, indicates the direction of the meteor orbit as seen from the earth.  2, record 31, English, - radiant

Record 31,  Textual support,  French

Record number: 31, Textual support number: 1 CONT

à certaines époques de l'année on voit ainsi un grand nombre d'étoiles filantes émaner d'un même point radiant.  2, record 31, French, - point%20radiant

Record 31,  Textual support,  Spanish

Record 32,  Textual support,  English

Record number: 32, Textual support number: 1 CONT

Many of the antennas on board communications spacecraft in geostationary orbit are fixed. Some applications for antennas require the ability to point at different areas. These antennas could be used to support a developing regional communication system after a natural disaster or to support a mobile activity. A new spacecraft antenna pointing mechanism concept is to be investigated. The mechanism could use actuators or similar devices which are configured as a "plunger" or a single axis rotary device. The aim of the project is to configure the pointing mechanism to ensure it is capable of pointing a one metre diameter antenna, with full earth coverage.  3, record 32, English, - antenna%20pointing%20mechanism

Record 32,  Textual support,  French

Record 32,  Textual support,  Spanish

Record 33,  Textual support,  English

Record number: 33, Textual support number: 1 DEF

A circular orbit around the Earth’s equator, at a distance of 6.6 Earth radii.  3, record 33, English, - synchronous%20orbit

Record number: 33, Textual support number: 1 OBS

At this distance the orbital period is 24 hours, keeping the satellite "anchored" above the same spot on Earth. This feature makes the synchronous orbit useful for communication satellites : a satellite transmitting TV programs to the US, for instance, will always be in touch with the US if "anchored" above it, and receiving antennas on the ground only need to point to one fixed spot in the sky.  3, record 33, English, - synchronous%20orbit

Record 33,  Textual support,  French

Record number: 33, Textual support number: 1 CONT

La nature d'une orbite synchrone de 35 900 km d'altitude impose une vitesse orbitale égale à la vitesse de rotation de la Terre. Ainsi, un vaisseau placé sur une telle orbite reste apparemment fixe dans l'espace au-dessus d'un point de la Terre.  2, record 33, French, - orbite%20synchrone

Record 33,  Textual support,  Spanish

Record 34,  Textual support,  English

Record number: 34, Textual support number: 1 CONT

The SOSS(Sub-Orbital Single Stage) OA(Once-Around) RRL [Reusable Rocket Launcher].... The down-range capability of the first stage is now extended to the point where it can complete one trip around the Earth so as to land back at the launch base... The first stage therefore provides almost the total Delta V needed to reach orbit and the payload, ejected in vacuum but still at sub-orbital speed, achieves orbital velocity with its own propulsion system.  2, record 34, English, - sub%2Dorbital%20single%20stage

Record 34,  Textual support,  French

Record 34,  Textual support,  Spanish

Record 35,  Textual support,  English

Record number: 35, Textual support number: 1 CONT

The SOSS(Sub-Orbital Single Stage) OA(Once-Around) RRL [Reusable Rocket Launcher].... The down-range capability of the first stage is now extended to the point where it can complete one trip around the Earth so as to land back at the launch base... The first stage therefore provides almost the total Delta V needed to reach orbit and the payload, ejected in vacuum but still at sub-orbital speed, achieves orbital velocity with its own propulsion system.  3, record 35, English, - sub%2Dorbital%20single%20stage%2Fonce%2Daround%20launcher

Record 35,  Textual support,  French

Record 35,  Textual support,  Spanish

Record 36,  Textual support,  English

Record number: 36, Textual support number: 1 CONT

External forces on the ISS [International Space Station] during flight in low-Earth orbit require attitude adjustments using the control functions(effectors)... These forces act on the Station to produce torques that are dependent on the seasons, diurnal(daily) phase, and the solar cycle. To counter these forces the Control Moment Gyros and Gyrodynes are used to rotate the ISS in the opposite directions, until the momentum stored in these gyros reaches a maximum, or saturation. At this point, the gyros must be desaturated, or spun down, by firing the thrusters in the opposite direction. Desaturation takes valuable propulsion fuel and is programmed for a minimum of use.  1, record 36, English, - desaturation

Record 36,  Textual support,  French

Record number: 36, Textual support number: 1 CONT

On rappelle qu'en gyroscopie, la théorie est faite pour des vitesses angulaires petites et que pour [gamma] approchant de 90° ce n'est pas le cas. D'ailleurs pour les spécialistes cette position d'alignement de l'axe gyro avec celui d'une armature est une position interdite. Ainsi [gamma] augmente en module. Ce phénomène s'appelle saturation des gyros et nécessite au bout d'une certaine période une désaturation. La désaturation consiste à appliquer sur un temps court, avec en général des actuateurs à tuyères, un couple conséquent sur le satellite et à laisser le système de contrôle agir jusqu'à ce que les roues ou les gyroscopes retrouvent leur configuration d'origine.  2, record 36, French, - d%C3%A9saturation

Record number: 36, Textual support number: 2 CONT

Environ 2h30 avant la poussée du moteur, des commandes sont envoyées à la sonde pour allumer des petits moteurs embarqués pour «désaturer» ou vider les moments des volants d'inertie. Ces dispositifs sont similaires aux gyroscopes et sont utilisés pour contrôler l'orientation de la sonde - son positionnement sur 3 axes - pour qu'elle montre la face désirée. La désaturation préparent les volants d'inertie pour la tâche de tourner Odyssey dans la bonne position pour la poussée d'insertion orbitale.  3, record 36, French, - d%C3%A9saturation

Record 36,  Textual support,  Spanish

Record 37,  Textual support,  English

Record number: 37, Textual support number: 1 CONT

Temporal resolution refers to how often the same geographic area is revisited by a sensor. Temporal resolution is governed by the orbital characteristics of the satellite vehicle. A sun-synchronous orbit means that the satellite travels on multiple pole to pole orbits coordinated with the circle of illumination(hemisphere of the Sun's incident light), such that the satellite collects at approximately the same time of day at every point on the Earth for every orbit.  2, record 37, English, - temporal%20resolution

Record number: 37, Textual support number: 1 OBS

temporal resolution: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, record 37, English, - temporal%20resolution

Record 37,  Textual support,  French

Record number: 37, Textual support number: 1 DEF

Intervalle de temps qui sépare des observations successives de la même surface ou des mêmes objets.  2, record 37, French, - r%C3%A9solution%20temporelle

Record number: 37, Textual support number: 1 OBS

L'intervalle entre les prises de vue d'un même lieu [dépend] de l'orbite du satellite.  3, record 37, French, - r%C3%A9solution%20temporelle

Record number: 37, Textual support number: 2 OBS

résolution temporelle : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, record 37, French, - r%C3%A9solution%20temporelle

Record 37,  Textual support,  Spanish

Record 38,  Textual support,  English

Record number: 38, Textual support number: 1 DEF

Space, with as many dimensions as there are degrees of freedom, in which the state of a dynamic system is represented by a point and its evolution by an orbit.  1, record 38, English, - dynamic%20phase%20space

Record 38,  Textual support,  French

Record number: 38, Textual support number: 1 OBS

On utilise la lettre X pour l'énergie car, plus bas, une configuration d'énergie correspondra à un point dans l'espace de phase de notre système dynamique.  2, record 38, French, - espace%20de%20phase%20d%27un%20syst%C3%A8me%20dynamique

Record number: 38, Textual support number: 2 OBS

L'espace de phase est le recensement des états possibles d'un système dynamique. On peut également le définir comme un espace abstrait dont chaque variable représente une dimension nécessaire à la description du système à un moment donné.  3, record 38, French, - espace%20de%20phase%20d%27un%20syst%C3%A8me%20dynamique

Record number: 38, Textual support number: 3 OBS

Espace des phases. Il est possible de suivre l'évolution de l'état d'un système physique dans le temps. Pour cela, on construit d'abord un modèle avec les lois physiques et les paramètres nécessaires et suffisants pour caractériser le système. Ce modèle est constitué par des équations différentielles. On définira, à un instant donné, un point dans un «repère». Ce point caractérisera l'état du système dans l'espace à cet instant. Cet espace est appelé «l'espace des phases». Lorsque le temps s'écoule, le point figurant l'état du système décrit en général une courbe dans cette espace. On parle alors de son orbite.  4, record 38, French, - espace%20de%20phase%20d%27un%20syst%C3%A8me%20dynamique

Record 38,  Textual support,  Spanish

Record 39,  Textual support,  English

Record number: 39, Textual support number: 1 CONT

The location accuracy provided by the new RADARSAT-1 orbit maintenance was evaluated using the location of the Alert weather station as a reference point.  3, record 39, English, - location%20accuracy

Record 39,  Textual support,  French

Record 39,  Textual support,  Spanish

Record 40,  Textual support,  English

Record number: 40, Textual support number: 1 CONT

External forces on the ISS [International Space Station] during flight in low-Earth orbit require attitude adjustments using the control functions(effectors)... These forces act on the Station to produce torques that are dependent on the seasons, diurnal(daily) phase, and the solar cycle. To counter these forces the Control Moment Gyros and Gyrodynes are used to rotate the ISS in the opposite directions, until the momentum stored in these gyros reaches a maximum, or saturation. At this point, the gyros must be desaturated, or spun down, by firing the thrusters in the opposite direction. Desaturation takes valuable propulsion fuel and is programmed for a minimum of use.  1, record 40, English, - saturation

Record 40,  Textual support,  French

Record number: 40, Textual support number: 1 CONT

On rappelle qu'en gyroscopie, la théorie est faite pour des vitesses angulaires petites et que pour [gamma] approchant de 90° ce n'est pas le cas. D'ailleurs pour les spécialistes cette position d'alignement de l'axe gyro avec celui d'une armature est une position interdite. Ainsi [gamma] augmente en module. Ce phénomène s'appelle saturation des gyros et nécessite au bout d'une certaine période une désaturation. La désaturation consiste à appliquer sur un temps court, avec en général des actuateurs à tuyères, un couple conséquent sur le satellite et à laisser le système de contrôle agir jusqu'à ce que les roues ou les gyroscopes retrouvent leur configuration d'origine.  1, record 40, French, - saturation%20des%20gyros

Record 40,  Textual support,  Spanish

Record 41,  Textual support,  English

Record number: 41, Textual support number: 1 DEF

Orbit in which an equatorial satellite revolves about the Earth at the same angular rate as the Earth rotates on its axis. From the Earth, the satellite thus appears to be stationary over a point on the Earth.  1, record 41, English, - stationary%20orbit

Record 41,  Textual support,  French

Record number: 41, Textual support number: 1 DEF

Orbite sur laquelle un satellite équatorial se déplace autour du globe avec la même vitesse angulaire que celle de la Terre tournant autour de son axe. Vu d'un point de la Terre, le satellite paraît donc immobile.  1, record 41, French, - orbite%20stationnaire

Record 41,  Textual support,  Spanish

Record number: 41, Textual support number: 1 DEF

Órbita que describe un satélite ecuatorial girando alrededor de la Tierra, a la misma velocidad angular que la de rotación de la Tierra. Desde la Tierra, dicho satélite parece permanecer estacionario sobre un punto de ésta.  1, record 41, Spanish, - %C3%B3rbita%20estacionaria

Record 42,  Textual support,  English

Record number: 42, Textual support number: 1 DEF

Point in the orbit that is closest to the central attracting body(called perigee for orbits about the earth and perihelion for orbits about the sun).  3, record 42, English, - pericenter

Record 42,  Textual support,  French

Record 42,  Textual support,  Spanish

Record 43,  Textual support,  English

Record number: 43, Textual support number: 1 DEF

An attractor that consists of a single point in phase space and describes a stationary state of a system.  2, record 43, English, - attractor%20point

Record number: 43, Textual support number: 1 CONT

Let us first examine the simplest attractor : a point. The "orbit" following the motion of a small ball put inside a funnel begins with wiggles that depend on its initial position and velocity, but converges eventually to the funnel' s tip; if the ball is bigger than the funnel aperture it comes to rest at the tip. The tip is a stable equilibrium point, or stable fixed point, for the ball.... The funnel' s tip is called an attractor point.  7, record 43, English, - attractor%20point

Record number: 43, Textual support number: 2 CONT

The point attractor is a solution which is independent of time that is, a steady state attractor. The system does not evolve.  6, record 43, English, - attractor%20point

Record number: 43, Textual support number: 1 OBS

See dynamical dissipative system, basin of attraction, limit cycle, torus. Compare to repelling point, saddle-point.  8, record 43, English, - attractor%20point

Record 43,  Textual support,  French

Record number: 43, Textual support number: 1 DEF

Le plus simple type d'attracteur. Point singulier correspondant à une solution stationnaire de l'équation du mouvement et caractérisant un système qui évolue toujours vers un état unique.  4, record 43, French, - point%20attracteur

Record number: 43, Textual support number: 1 CONT

Quand le module initial de z est assez petit, le point représentatif tend vers un point particulier; quand le module initial est assez grand, il croît indéfiniment, et l'infini joue alors le rôle d'attracteur. Le premier point attracteur et l'infini constituent donc deux orbites attractives pour les points du plan complexe (...)  6, record 43, French, - point%20attracteur

Record number: 43, Textual support number: 1 OBS

Le point d'équilibre unique d'une pendule amortie en est l'exemple classique de ce type d'attracteur. S'oppose à répulseur, point répulsif.  7, record 43, French, - point%20attracteur

Record 43,  Textual support,  Spanish

Record 44,  Textual support,  English

Record number: 44, Textual support number: 1 DEF

Point in the orbit that is farthest from the central attracting body(called apogee for orbits about the earth and aphelion for orbits about the sun).  1, record 44, English, - apocenter

Record 44,  Textual support,  French

Record 44,  Textual support,  Spanish

Record 45,  Textual support,  English

Record number: 45, Textual support number: 1 DEF

Recurring at equal intervals of time.  2, record 45, English, - periodic

Record number: 45, Textual support number: 1 CONT

A subset P of X is periodic of period m if it coincides with the set obtained by adding m to each of its elements.  3, record 45, English, - periodic

Record number: 45, Textual support number: 1 PHR

periodic binary number, crystal, function, motion, orbit, point, solution, window.  4, record 45, English, - periodic

Record 45,  Textual support,  French

Record number: 45, Textual support number: 1 DEF

Se dit de ce qui revient à des moments déterminés, à intervalles réguliers; cyclique, alternatif.  2, record 45, French, - p%C3%A9riodique

Record number: 45, Textual support number: 1 OBS

Un sous-ensemble X de Z est appelé périodique de période m, s'il coïncide avec l'ensemble obtenu en ajoutant m à chacun de ses éléments.  3, record 45, French, - p%C3%A9riodique

Record 45,  Textual support,  Spanish

Record 46,  Textual support,  English

Record number: 46, Textual support number: 1 CONT

The Sierpinski points... form what is called the invariant set of the map : once a Sierpinski point, always a Sierpinski point. If you start with a Sierpinski point with irrational coordinates, its orbit may look completely chaotic, but the succession of image points is fully determined by the coordinate values of the initial point. This is why such behavior, which abounds in nature, is called deterministic chaos....  1, record 46, English, - Sierpinski%20point

Record 46,  Textual support,  French

Record 46,  Textual support,  Spanish

Record 47,  Textual support,  English

Record number: 47, Textual support number: 1 CONT

A homoclinic point, together with its backward orbit... and its(finite) forward orbit, is called a homoclinic orbit.  1, record 47, English, - homoclinic%20orbit

Record number: 47, Textual support number: 1 OBS

Degenerate homoclinic orbit, nondegenerate homoclinic orbit.  2, record 47, English, - homoclinic%20orbit

Record 47,  Textual support,  French

Record 47,  Textual support,  Spanish

Record 48,  Textual support,  English

Record number: 48, Textual support number: 1 CONT

Altitude is stabilized at this point by means of mono-propellant thrusters, whereupon the fourth stage apogee motor ignites to burn for 30 seconds to inject the payload into the desired elliptical orbit.  1, record 48, English, - mono%2Dpropellant%20thruster

Record 48,  Textual support,  French

Record number: 48, Textual support number: 1 CONT

L'altitude est stabilisée par des moteurs de type monoergol, et le quatrième étage s'allume alors et injecte le satellite sur l'orbite elliptique désirée.  1, record 48, French, - moteur%20de%20type%20monoergol

Record 48,  Textual support,  Spanish

Record 49,  Textual support,  English

Record number: 49, Textual support number: 1 DEF

The time between two consecutive passages of a satellite through a characteristic point on its orbit.  1, record 49, English, - period%20of%20revolution

Record 49,  Textual support,  French

Record number: 49, Textual support number: 1 DEF

Intervalle de temps compris entre deux passages consécutifs d'un satellite en un point caractéristique de son orbite.  1, record 49, French, - p%C3%A9riode%20de%20r%C3%A9volution

Record 49,  Textual support,  Spanish

Record 50,  Textual support,  English

Record number: 50, Textual support number: 1 DEF

In celestial mechanics, the angle between the radius vector to an orbiting body from its primary(the focus of the orbital ellipse) and the line of apsides of the orbit, measured in the direction of travel, from the point of closest approach to the primary(perifocus).  1, record 50, English, - anomaly

Record 50,  Textual support,  French

Record number: 50, Textual support number: 1 DEF

Angle caractérisant la position d'une planète sur son orbite, repérée par rapport au grand axe de l'orbite.  1, record 50, French, - anomalie

Record 50,  Textual support,  Spanish

Record 51,  Textual support,  English

Record number: 51, Textual support number: 1 OBS

... the angle measured from the center M of the elliptic orbit between the perihelion and the point G’, where G’ is the point of intersection of the perpendicular dropped from G on to the line connecting perihelion and aphelion A and the circle described about the center of the ellipse with radius equal to the semi-axis major of the ellipse.  2, record 51, English, - eccentric%20anomaly

Record 51,  Textual support,  French

Record number: 51, Textual support number: 1 OBS

Angle formé au centre de l'ellipse par le grand axe et le rayon du cercle construit sur le grand axe et aboutissant à la perpendiculaire abaissée du lieu vrai sur cet axe.  1, record 51, French, - anomalie%20excentrique

Record 51,  Textual support,  Spanish

Record 52,  Textual support,  English

Record number: 52, Textual support number: 1 CONT

... a ballistic entry from an earth orbit must commence at the point of retrothrust initiation.  1, record 52, English, - point%20of%20retrothrust%20initiation

Record 52,  Textual support,  French

Record number: 52, Textual support number: 1 CONT

[...] une rentrée balistique après une orbite terrestre doit commencer au point de départ des opérations de rétropoussée [...]  1, record 52, French, - point%20de%20d%C3%A9part%20des%20op%C3%A9rations%20de%20r%C3%A9tropouss%C3%A9e

Record number: 52, Textual support number: 1 OBS

rentrée balistique.  1, record 52, French, - point%20de%20d%C3%A9part%20des%20op%C3%A9rations%20de%20r%C3%A9tropouss%C3%A9e

Record 52,  Textual support,  Spanish