Highly Elliptical Orbit 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 descent from apogee.... geosynchronous orbit
Geosynchronous orbit
A geosynchronous orbit is an orbit around the Earth with an orbital period matching the Earth's sidereal day rotation period. This synchronization means that for an observer at a fixed location on Earth, a satellite in a geosynchronous orbit returns to exactly the same place in the sky at exactly the same time each day.... with a high inclination
Inclination
Inclination in general is the angle between a reference plane and another plane or Axis_of_rotation of direction. The axial tilt is expressed as the angle made by the planet's axis and a line drawn through the planet's center perpendicular to the orbital plane.... (usually near 63.4°) and an orbital period
Orbital period
The orbital Periodicity is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars.... of one sidereal day (almost 24 hour
Hour
The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI.... s). A satellite placed in this orbit spends most of its time over a chosen area of the Earth
Earth
Earth is the third planet from the Sun. Earth is the largest of the terrestrial planets in the Solar System in diameter, mass and density. It is also referred to as the World and Wiktionary:Terra.Note that by International Astronomical Union convention, the term "Terra" is used for naming extensive land masses, rather... , a phenomenon known as apogee
Apsis
In celestial mechanics, an apsis, plural apsides is the point of greatest or least distance of the elliptical orbit of an object from its center of attraction, which is generally the center of mass of the system.... dwell. The ground track
Ground track
A ground track or ground trace is the path on the surface of the Earth directly below an aircraft or satellite. In the case of a satellite, it is the 3D projection of the satellite's orbit onto the surface of the Earth .... of a satellite in a tundra orbit is a closed "figure-eight" lemniscate
Lemniscate
In algebraic geometry, lemniscate refers to any of several figure-eight or 8 shaped curves, of which the best known is the Lemniscate of Bernoulli.... .
A Molniya orbit is a type of highly elliptical orbit with an inclination of 63.4 Degree s and an orbital period of about 12 hours. Molniya orbits are named after a series of Soviet Union/Russian Molniya communications satellites which have been using this type of orbit since the mid 1960s.... s which have the same inclination but half the period (about 12 hours).
Highly Elliptical Orbit 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 descent from apogee.... geosynchronous orbit
Geosynchronous orbit
A geosynchronous orbit is an orbit around the Earth with an orbital period matching the Earth's sidereal day rotation period. This synchronization means that for an observer at a fixed location on Earth, a satellite in a geosynchronous orbit returns to exactly the same place in the sky at exactly the same time each day.... with a high inclination
Inclination
Inclination in general is the angle between a reference plane and another plane or Axis_of_rotation of direction. The axial tilt is expressed as the angle made by the planet's axis and a line drawn through the planet's center perpendicular to the orbital plane.... (usually near 63.4°) and an orbital period
Orbital period
The orbital Periodicity is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars.... of one sidereal day (almost 24 hour
Hour
The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI.... s). A satellite placed in this orbit spends most of its time over a chosen area of the Earth
Earth
Earth is the third planet from the Sun. Earth is the largest of the terrestrial planets in the Solar System in diameter, mass and density. It is also referred to as the World and Wiktionary:Terra.Note that by International Astronomical Union convention, the term "Terra" is used for naming extensive land masses, rather... , a phenomenon known as apogee
Apsis
In celestial mechanics, an apsis, plural apsides is the point of greatest or least distance of the elliptical orbit of an object from its center of attraction, which is generally the center of mass of the system.... dwell. The ground track
Ground track
A ground track or ground trace is the path on the surface of the Earth directly below an aircraft or satellite. In the case of a satellite, it is the 3D projection of the satellite's orbit onto the surface of the Earth .... of a satellite in a tundra orbit is a closed "figure-eight" lemniscate
Lemniscate
In algebraic geometry, lemniscate refers to any of several figure-eight or 8 shaped curves, of which the best known is the Lemniscate of Bernoulli.... .
A Molniya orbit is a type of highly elliptical orbit with an inclination of 63.4 Degree s and an orbital period of about 12 hours. Molniya orbits are named after a series of Soviet Union/Russian Molniya communications satellites which have been using this type of orbit since the mid 1960s.... s which have the same inclination but half the period (about 12 hours). The only current user of tundra
Tundra
In physical geography, tundra is an biome where the tree growth is hindered by low temperatures and short growing seasons. The term tundra comes from Kildin Sami tund?r, which means "uplands, treeless mountain tract." There are two types of tundra: Arctic tundra and alpine tundra.... orbits is Sirius Satellite Radio
Sirius Satellite Radio
Sirius Satellite Radio is a satellite radio service operating in the United States and Canada, owned by Sirius XM Radio. Headquartered in New York City, with smaller studios in Los Angeles and Memphis, Tennessee, Sirius was officially launched on July 1, 2002 and currently provides 69 streams of music and 65 streams of sports, news and ente... , which operates a constellation
Satellite constellation
A group of Electronics satellites working in concert is known as a satellite constellation. Such a constellation can be considered to be a number of satellites with coordinated ground coverage, operating together under shared control, synchronised so that they overlap well in coverage and complement rather than interfere with other satelli... of three satellite
Satellite
In the context of spaceflight, a satellite is an Physical body which has been placed into orbit by human endeavor. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon.... s.
