Communication satellites are placed in which orbit
3 orbits
Communication satellites are located in the outermost layer of the Earth's atmosphere, known as space or the exosphere. This layer begins at an altitude of around 500 kilometers (310 miles) and extends out to the limit of the Earth's gravitational influence, which is about 10,000 kilometers (6,200 miles)..
Are communication satellites placed in circular orbit?
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. These are called geosynchronous orbits. The radius of the earth is 6.37 x 10⁶ m, and the altitude of a geosynchronous orbit is 3.58 x 10⁷ m (≈ 22,000 miles)..
How do communication satellites stay in orbit?
A satellite maintains its orbit by balancing two factors: its velocity (the speed it takes to travel in a straight line) and the gravitational pull that Earth has on it. A satellite orbiting closer to the Earth requires more velocity to resist the stronger gravitational pull..
Satellites and their uses
Communication satellites are placed in a geosynchronous orbit, i.e., in a circular orbit such that they complete one full revolution about the earth in one sidereal day (23.934 h), and thus appear stationary with respect to the ground..
Types of satellite
Communications Satellites Close the Gaps Satellites positioned in high orbits could "see" large swaths of Earth, allowing them to receive and send signals from distant places. Satellites brought radical change, filling in communication gaps and providing telephone and television connection nearly worldwide..
Types of satellite
There are three types of communication services that satellites provide: telecommunications, broadcasting, and data communications. Telecommunication services include telephone calls and services provided to telephone companies, as well as wireless, mobile, and cellular network providers..
What is the orbit called where communication satellites are parked?
A geostationary orbit is actually a type of geosynchronous orbit. The key difference between a geostationary orbit and a geosynchronous orbit is while the latter can have any inclination, the former orbit sees satellites permanently 'parked' over the plane of Earth's equator..
What is the orbital period of communication satellites?
The satellite revolves around the earth, and at the same time earth revolves around the sun; that is why it remains stationary concerning a particular point. The communication satellite is geostationary, and therefore its time period is 24 hours..
Where are the communication satellites located?
Communication satellites are located in the outermost layer of the Earth's atmosphere, known as space or the exosphere. This layer begins at an altitude of around 500 kilometers (310 miles) and extends out to the limit of the Earth's gravitational influence, which is about 10,000 kilometers (6,200 miles)..
Which orbit is suitable for satellite communication?
Geostationary orbit (GEO) A geostationary orbit is useful for communications because ground antennas can be aimed at the satellite without their having to track the satellite's motion..
Why are communication satellites placed in geostationary orbit?
Communications satellites are often placed in a geostationary orbit so that earth-based satellite antennas (located on Earth) do not have to rotate to track them but can be pointed permanently at the position in the sky where the satellites are located..
Why are satellites placed in different orbits?
The Short Answer: Satellites have different orbits because their orbits depend on what each satellite is designed to accomplish. Video showing the difference between a geostationary orbit and a polar orbit. The yellow areas shows what part of Earth each satellite 'sees' during its orbit..
Communications satellites are placed in a geostationary orbit so that the antennas located on Earth do not have to rotate to track them but can be pointed permanently at the position in the sky where the satellites are located.
How are satellites placed on Earth?
Satellites are placed from the surface to the orbit by launch vehicles, high enough to avoid orbital decay by the atmosphere. Satellites can then change or maintain the orbit by propulsion, usually by chemical or ion thrusters.
What is a communication satellite?
The first and historically most important application for communication satellites was in intercontinental long distance telephony. The fixed Public Switched Telephone Network relays telephone calls from land line telephones to an earth station, where they are then transmitted to a geostationary satellite. The downlink follows an analogous path.
Where are telecommunications satellites located?
Telecommunications satellites are usually placed in geostationary Earth orbit (GEO). GEO is a circular orbit 35 786 kilometres above Earth's equator and follows the direction of Earth's rotation. An object in GEO has an orbital period equal to Earth's rotational period, so to ground observers it appears motionless at a fixed position in the sky.
Why are satellites placed in a geostationary orbit?
Communications satellites are often placed in a geostationary orbit so that Earth-based satellite antennas do not have to rotate to track them but can be pointed permanently at the position in the sky where the satellites are located.
How do satellites get into orbit?
In a similar fashion, a satellite is put into orbit by being placed hundreds or thousands of kilometres above Earth’s surface (as if in a very tall tower) and then being given a ‘push’ by the rocket’s engines to make it start on its orbit
How does a communication satellite work?
It also bypasses the need for cables and uses various wavelengths of the electromagnetic spectrum in the microwave range (1 meter to 1 millimeter) to transmit information
It is important to note that a communication satellite can relay multiple signals at the same time, using the same or a separate transponder for each communication link
Where are telecommunications satellites located?
Telecommunications satellites are usually placed in geostationary Earth orbit (GEO)
GEO is a circular orbit 35 786 kilometres above Earth's equator and follows the direction of Earth's rotation
An object in GEO has an orbital period equal to Earth's rotational period, so to ground observers it appears motionless at a fixed position in the sky
×Geostationary Earth orbit (GEO)Telecommunications satellites are usually placed in geostationary Earth orbit (GEO). GEO is a circular orbit 35 786 kilometres above Earth's equator and follows the direction of Earth's rotation. An object in GEO has an orbital period equal to Earth's rotational period, so to ground observers it appears motionless at a fixed position in the sky.
Circular areosynchronous orbit in the Martian equatorial plane
An areostationary orbit or areosynchronous equatorial orbit (AEO) is a circular areosynchronous orbit (ASO) in the Martian equatorial plane about 17,032 km (10,583 mi) above the surface, any point on which revolves about Mars in the same direction and with the same period as the Martian surface. Areostationary orbit is a concept similar to Earth's geostationary orbit (GEO). The prefix areo- derives from Ares, the ancient Greek god of war and counterpart to the Roman god Mars, with whom the planet was identified. The modern Greek word for Mars is Άρης (Áris).
Communication satellites are placed in which orbit
Orbit keeping the satellite at a fixed longitude above the equator
A geosynchronous orbit is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds. The synchronization of rotation and orbital period means that, for an observer on Earth's surface, an object in geosynchronous orbit returns to exactly the same position in the sky after a period of one sidereal day. Over the course of a day, the object's position in the sky may remain still or trace out a path, typically in a figure-8 form, whose precise characteristics depend on the orbit's inclination and eccentricity. A circular geosynchronous orbit has a constant altitude of 35,786 km (22,236 mi).
A halo orbit is a periodic
Periodic, three-dimensional orbit
A halo orbit is a periodic, three-dimensional orbit near one of the L1, L2 or L3 Lagrange points in the three-body problem of orbital mechanics. Although a Lagrange point is just a point in empty space, its peculiar characteristic is that it can be orbited by a Lissajous orbit or by a halo orbit. These can be thought of as resulting from an interaction between the gravitational pull of the two planetary bodies and the Coriolis and centrifugal force on a spacecraft. Halo orbits exist in any three-body system, e.g., a Sun–Earth–orbiting satellite system or an Earth–Moon–orbiting satellite system. Continuous families of both northern and southern halo orbits exist at each Lagrange point. Because halo orbits tend to be unstable, station-keeping using thrusters may be required to keep a satellite on the orbit.
A Molniya orbit is a type of satellite orbit designed to
Type of high-latitude satellite orbit
A Molniya orbit is a type of satellite orbit designed to provide communications and remote sensing coverage over high latitudes. It is a highly elliptical orbit with an inclination of 63.4 degrees, an argument of perigee of 270 degrees, and an orbital period of approximately half a sidereal day. The name comes from the Molniya satellites, a series of Soviet/Russian civilian and military communications satellites which have used this type of orbit since the mid-1960s.
A Tundra orbit is a highly elliptical geosynchronous
Highly elliptical and highly inclined synchronous orbit
A Tundra orbit is a highly elliptical geosynchronous orbit with a high inclination, an orbital period of one sidereal day, and a typical eccentricity between 0.2 and 0.3. A satellite placed in this orbit spends most of its time over a chosen area of the Earth, a phenomenon known as apogee dwell, which makes them particularly well suited for communications satellites serving high-latitude regions. The ground track of a satellite in a Tundra orbit is a closed figure 8 with a smaller loop over either the northern or southern hemisphere. This differentiates them from Molniya orbits designed to service high-latitude regions, which have the same inclination but half the period and do not loiter over a single region.
