Tundra orbit


Tundra orbit

Tundra orbit is a type of highly elliptical geosynchronous orbit with a high inclination (usually near 63.4°) and an orbital period of one sidereal day (almost 24 hours). A satellite placed in this orbit spends most of its time over a chosen area of the Earth, a phenomenon known as apogee dwell. The ground track of a satellite in a tundra orbit is a closed "figure-eight" lemniscate.

These are conceptually similar to Molniya orbits which have the same inclination but half the period (about 12 hours). The only current user of tundra orbits is Sirius Satellite Radio, which operates a constellation of three satellites.

References

* [http://www.cubesat.auc.dk/documents/Mission_Analysis_Example.pdf Sample Mission Analysis] from the Danish Space Research Institute (see page 8).

ee also

*List of orbits


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Tundra-Orbit — Ein Tundra Orbit ist die hoch elliptische Umlaufbahn eines geosynchronen Satelliten mit einer Inklination von meist 63,4°. 3 geostationäre Satelliten erfassen die gesamte Erde, aber lediglich bis zu einer geografischen Breite von maximal 81,3°.… …   Deutsch Wikipedia

  • Orbit — This article is about orbits in celestial mechanics, due to gravity. For other uses, see Orbit (disambiguation). A satellite orbiting the Earth has a tangential velocity and an inward acceleration …   Wikipedia

  • Orbit of the Moon — Not to be confused with Lunar orbit in the sense of a selenocentric orbit, that is, an orbit around the Moon The Moon completes its orbit around the Earth in approximately 27.3 days (a sidereal month). The Earth and Moon orbit about their… …   Wikipedia

  • Orbit equation — In astrodynamics an orbit equation defines the path of orbiting body around central body relative to , without specifying position as a function of time. Under standard assumptions, a body moving under the influence of a force, directed to a… …   Wikipedia

  • Orbit phasing — In astrodynamics orbit phasing is the adjustment of the time position of spacecraft along its orbit, usually described as adjusting the orbiting spacecraft s true anomaly. This is predominantly used in satellite positioning, especially if the… …   Wikipedia

  • Geocentric orbit — Earth orbit redirects here. For the motion of the Earth around the Sun, see Earth s orbit. Earth orbiter redirects here. For the shuttle simulator, see Earth Orbiter 1. The following words may have more than one definition or other non Earth… …   Wikipedia

  • Molniya orbit — For other uses, see Molniya (disambiguation). Figure 1: The Molniya orbit. Usually the period from perigee + 2 hours to perigee + 10 hours is used to transmit to the northern hemisphere Molniya orbit is a type of highly elliptical orbit with an… …   Wikipedia

  • Elliptic orbit — A small body in space orbits a large one (like a planet around the sun) along an elliptical path, with the large body being located at one of the ellipse foci …   Wikipedia

  • Geostationärer Orbit — geostationäre Umlaufbahn Eine geosynchrone Umlaufbahn ist ein Satellitenorbit mit einer Umlaufzeit um die Erde, die der Rotationsdauer der Erde um ihre eigene Achse (23 Stunden, 56 Minuten, 4,09 Sekunden = 1 siderischer Tag) entspricht. Seine… …   Deutsch Wikipedia

  • Highly Elliptical Orbit — (HEO) is an elliptic orbit characterized by a relatively low altitude perigee and an extremely high altitude apogee. These extremely elongated orbits can have the advantage of long dwell times at a point in the sky during the approach to and… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.