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Devices such as telecommunications satellites, weather satellites, and broadcasting satellites rely on geostationary orbits to provide continuous coverage over a specific region on Earth. This allows for consistent and reliable communication, weather monitoring, and broadcasting services.
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What are the satellites placed 200 - 800 kilometers above earth?
Satellites placed 200 - 800 kilometers above Earth are typically used for Earth observation, communication, and scientific research. These satellites are considered low Earth orbit (LEO) satellites and offer advantages like lower latency for communication and higher resolution for imaging compared to satellites in higher orbits.
How many satellites do you need for a GPS to find your position on earth?
A GPS receiver typically needs signals from at least 4 satellites to accurately calculate your position on Earth. By triangulating the signals from multiple satellites, the GPS receiver can determine your location with high precision.
Where do geostationary satellites usually orbit?
Geostationary satellites typically orbit around the Earth's equator at an altitude of about 35,786 kilometers (22,236 miles). This high orbit allows the satellite to match the Earth's rotation speed, appearing stationary relative to a fixed point on the ground.
Why are GPS satellites easier to launch than Geostationary satellites?
The further away from the planet a satellite is, the longer the orbit. So satellites in low earth orbit - from about 120 to about 600 miles up - orbit the Earth in about 90 to 100 minutes, doing 15-18 orbits per day. The International Space Station, for example, is about 150 miles up, and appears to ZIP across the sky. The Space Shuttle can get up to "LEO" or "low Earth orbit".Higher orbits take longer. One of the most useful orbits is about 22,500 miles up, so that the satellite takes 24 hours to go around the Earth one time. The means that the satellite is orbiting the Earth at the same speed that the Earth itself is turning, so that the satellite appears to remain in the same place all the time. This is called "geo-synchronous" from the Latin words for "Earth" and "same time". Communications satellites and TV satellites are commonly in "geosych" orbits. The Shuttle cannot make it to geosynch altitude, for lack of fuel. So comsats headed to geosynch orbits are launched from the Shuttle with special booster rockets, or are launched from unmanned "heavy lift" rockets.
Why do satallites have to stay in the equotorial plane?
Satellites stay in the equatorial plane to achieve a geostationary orbit, where they match the rotation of the Earth and appear to hover over a fixed point on the equator. This allows them to maintain a consistent position relative to the surface of the Earth and provide continuous communication or observation coverage.
Are geostationary orbit and equatorial orbit same?
No. Geostationary orbits are equatorial, but equatorial orbits are not necessarily geostationary. To be geostationary, the orbit needs to be equatorial, circular and at the altitude such that one orbit takes one sidereal day (approximately 24 hours 3 minutes 56 seconds. ) An equatorial orbit need only be located above the equator, may have any period and need not be circular.
What is geostationony orbit?
A geostationary obit means the object doesn't move when observed over time. For example - the moon orbits the Earth - which is why it moves across the sky over time. Conversely - the network of GPS satellites are geostationary - because they need to remain in a fixed place in order for the receivers to measure their location accurately.
What are the types of orbits?
There are basically three types of orbits.* Sun Synchronous Orbits * Polar Orbits * Geosynchronous Orbits There are variations on these types. Visit related link below.
What has the author Enrico P Mercanti written?
Enrico P. Mercanti has written: 'Need for expanded environmental measurement capabilities in geosynchronous earth orbit' -- subject(s): Geostationary satellites, Artificial satellites in remote sensing
What are the advantages of utilizing selenosynchronous orbits for satellite communication and observation?
Synchronous orbits, such as geostationary orbits, offer several advantages for satellite communication and observation. These orbits allow satellites to remain in a fixed position relative to the Earth, providing continuous coverage of a specific area. This stability enables uninterrupted communication and observation, making it ideal for applications such as weather monitoring, telecommunications, and surveillance. Additionally, satellites in synchronous orbits experience less orbital drift, reducing the need for frequent adjustments and extending their operational lifespan.
Why are old satellites brought back from space?
Old satellites are brought back from space to avoid them becoming space debris that poses a risk of colliding with other operational satellites or spacecraft. By safely deorbiting and disposing of old satellites, it helps in reducing the amount of space debris in orbit around the Earth.
Why do satellites not need to be streamlined?
Satellites operate in the vacuum of space where there is no air resistance, so they do not need to be streamlined for aerodynamic purposes. Their design is primarily focused on functionality, efficiency, and stability in their orbits.
How does the satellite transmit tv programs inspite of the fact that it moves all the time?
Answer: A geostationary satellite is any satellite which is placed in a geostationary orbit. Satellites in geostationary orbit maintain a constant position relative to the surface of the earth. Geostationary satellites do this by orbiting the earth at approximately 22,300 miles above the equator. At this altitude, the speed of a satellite's rotation around the world is identical to the rotational speed of the world itself. While the satellite is actually moving; but moving at the same speed as the rotational speed of the world itself, it is always appears in the same azimuthal (angle); latitudinal and longitudinal position of the sky over the equator. Being geostationary allows an earth receiving & transmitting station to maintain bidirectional communications with satellites without the need of having to always reposition the earth based "dish" like antenna. A practical example is one's home whose television is connected to a unidirectional (receives only) dish antenna. If the satellite that the dish antenna is aimed at was not geostationary, people would lose the satellite's signal as soon as it deviated one degree from its position. In general, all data, audio & video satellites are launched into a geostationary orbit.
Does a satellite need fuel to keep moving?
Yes, a satellite in orbit requires fuel to make adjustments to its trajectory or maintain its position. However, satellites in geostationary orbit can maintain their position without fuel because they orbit above the same location on Earth.
Why a precise geo stationary orbit can not be obtained?
Because the geostationary orbit round the Earth is perturbed by gravity from the Sun and Moon. The biggest effect is to change the orbital plane of the geostationary satellite so that, after a while on station, in 24 hours it appears to move up and down slightly. For that reason communications satellites need motors and fuel to correct the orbit from time to time.
Why is geostationary important?
A geostationary satellite is an earth-orbiting satellite, placed at an altitude of approximately 35,800 kilometers (22,300 miles) directly over the equator, that revolves in the same direction the earth rotates (west to east). At this altitude, one orbit takes 24 hours, the same length of time as the earth requires to rotate once on its axis. The term geostationary comes from the fact that such a satellite appears nearly stationary in the sky as seen by a ground-based observer. In other words a satellite that orbits a specific part of the earth while the earth is rotating so it looks like the satellite doesn't move. For example if you put a satellite over over the geographic US it will stay over the US and turn with the earth around the axis without ever loosing site of the US.
What kind of orbit are observation satellites usually placed in?
You mean Earth observation satellites, and the answer is near-Polar low-Earth orbits. This means that as the satellite orbits from above one pole to the other, the Earth turns beneath it, and the satellite passes over the Equator, and every other point on its orbit, at a different place on each successive orbit. In this way, after enough orbits, it can view the whole Earth. Earth observation satellites are placed in low-Earth orbit because (a) they travel faster over the ground at lower altitude and (b) being closer to the ground, their telescopes do not need to be so powerful to achieve a given spatial resolution. Military observation, or spy, satellites, are often placed in a high parking orbit until they are needed, whereupon they are placed into a highly elliptical orbit to allow them to come very close to Earth (and hence see it with great detail) over the region of interest.
