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What is the differenceperiod and orbit radius near earth and geostationary satellites?
(Assuming sattelite mass is small enough compared to that of earth so it can be
ignored in the calculations)
Basically, the nearer you are, the faster you have to go.
CALCULATING ORBITAL VELOCITY (v) (radius given)
G = newtons gravitational constant (6.673 * 10-11)
M = mass of earth ( 5.974 * 1024 kg)
r = orbital radius
v = orbital velocity
For any given orbital radius, only one velocity will sustain stable orbit.
(Acceleration due to gravity) = (Acceleration due to centripetal force)
(G*M / r2) = (v2 / r)
For stable orbit velocity, first choose orbital radius.
Rearrange (G*M / r2) = (v2 / r) to isolate v (stable orbit velocity)
v = square root ( (G* M) / r
Example:
The minimum altitude where you will be free of atmosphere gases, and thus air resistance is about 100 km (100 000 metres), from earths centre thats
= 6 471 000 metres
The velocity required to produce stable orbit = square root ((G*M) / r)
= 7849 metres per second (17 558 mph)
Orbital time = ((2*pi*r) / v) seconds
GEOSYNCHRONOUS ORBIT
A 360 degree rotation of the earth ( sidereal day ) takes 23.934 hours
( 86164 seconds), for geostationary orbit only one orbital radius is suitable that will result in equalling this time.
by trial and eror:
example radius (r), calculate v, then: time (seconds) = (2*pi*r) / v
repeat until time = 86164 seconds
works out at approx 42 164 000 metres radius
What else can I help you with?
What is a geostationary satellite?
Geostationary is the moving orbit in the plane of the equator. Geostationary satellites are 22,300 miles above the Earths surface, and remain stationary at a fixed point. Weather and communication satellites are examples of geostationary satellites.
How far above the earth is geostationary orbit?
Geostationary satellites are in an orbit that's 22,282 mi (35,786 km) above the surface of the Earth. For more on Geostationary satellite orbits, visit http://www.idirect.net/Company/Satellite-Basics/How-Satellite-Works.aspx
What are true of a geostationary weather satellite except that it?
Orbiting the Earth above the equator is true of geostationary weather satellites and they have infrared sensors to transmit images of the entire hemisphere continuously. All of those things are true except that while they are moving in orbit they appear motionless.
What are the main differences between geostationary orbit and polar orbit?
A polar orbit is an Orbit in which a Satellite passes above or nearly above both of the Geographical poles of the body (usually a planet such as the Earth, but possibly another body such as the Sun being orbited on each revolution. It therefore has an Inclination of (or very close to) 90 degrees to the Equator. Except in the special case of a polar Geosynchronous orbit, a satellite in a polar orbit will pass over the equator at a different Longitude on each of its orbits.A geostationary orbit (GEO) is a circular orbit directly above the Earth's Equator From the ground, a geostationary object appears motionless in the sky and is therefore the Orbit of most interest to operators of Communication Satellites. Their orbital periods (time taken to revolve around earth) is exactly the same as the planet's (such as Earth's) rotational period. The Geosynchronous orbit is approximately 36,000 km above Earth's surface.geostionary satellites are positioned at an exact height above the earth, at this height they orbit the earth at the same speed at which the earth rotates on its axis whereas polar satellites have a much lower orbit, orbiting the earth quite quickly, scanning different areas of the earth at fairly infrequent periods.
Why doesnt a geostationary satellite trace a path over the surface of the earth?
A geostationary satellite does not trace a path over the surface of the earth because that is what geostationary means - the satellite is stationary over a point on the Earth.
What is the radius of a geostationary orbit around Earth?
The radius of a geostationary orbit around Earth is approximately 42,164 kilometers.
How are satellites stationed?
The time for one (stable) orbit is directly linked to the orbital radius. At one particular radius (geostationary), the resultant stable orbit velocity is exactly enough to match the rotation of the earth, keeping the satellite overhead at all times. This geostationary radius is approximately 42 000 km from earths centre and most geostationary satellites are roughly in the equatorial plane.
Can five satellites cover the whole surface of the earth?
Actually only 3 geostationary satellites are enough to cover the earth.
Why are all geostationary satellites the same distance above the earth?
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Why does a satellite travel over different parts of the earth?
Because most satellites are not 'geostationary'. A geostationary satellite orbits the Earth at the same speed that the Earth spins on its axis - such as the GPS grid, or TV relay satellites. Most satellites travel faster or slower than the Earth spins.
What is a geostationary satellite?
Geostationary is the moving orbit in the plane of the equator. Geostationary satellites are 22,300 miles above the Earths surface, and remain stationary at a fixed point. Weather and communication satellites are examples of geostationary satellites.
How many miles above the Earth are satellites typically positioned?
Satellites are typically positioned around 22,236 miles above the Earth in a geostationary orbit.
Do all space satellites stay in the thermosphere?
No. That only applies to low Earth orbit. Geostationary satellites orbit beyond it.
What is isochronous satellites?
An isochronous satellite is one that orbits the earth in one day. So it orbits the earth as the same speed as the earth rotates. Most satellites that are isochronous are infact geostationary satellites as they also stay in the same position above the earth. However these satellites occupy a very specific orbit above the equator. It is possible to have isochronous satellites that aren't geostationary however getting them to remain in orbit would prove difficult.
What is a non Geo stationary satellite?
Non Geo stationary satellite is that satellite which has different angular velocity from earth and not placed on the height of 36000 Km from the earth. If you use Geo stationary satellite than only 3 satellites are enough to cover whole world. most of satellite are geostationary and they are(most of them) active satellites too.
How far above the earth is geostationary orbit?
Geostationary satellites are in an orbit that's 22,282 mi (35,786 km) above the surface of the Earth. For more on Geostationary satellite orbits, visit http://www.idirect.net/Company/Satellite-Basics/How-Satellite-Works.aspx
Do the satellites orbit earth in the exosphere?
Satellites orbit Earth in the thermosphere and exosphere, which are the upper layers of the Earth's atmosphere. The exosphere is the outermost layer of the atmosphere where most satellites, particularly those in geostationary orbit, are found.
