Is communication use of man made satellites?

Answer 1

The advantages of space satellites are:

- Communication.

Satellites have greatly improved communication, not just nationally, but internationally. Nowadays a call can be placed from the United Kingdom to China in a matter of seconds.

Satellites also enable us to have mobile phones, without satellites, mobile phones are just a useless plastic square with numbers on it.

Satellites have also improved military communications (see below).

- Military and Security.

Military-controlled spy satellites are constantly scanning and keeping an eye on hostile territories around the globe, providing images, video and even voice recordings(!) to military command and intelligence agencies.

Satellites have also improved communication on the battlefield. Rather than using carrier pigeon services, wired phones and short-range wireless phones (which are not reliable), troops overseas now have satellite phones which can be used to contact friendlies, their headquarters, an allied aircraft carrier hundreds of miles away for air support and so on with rarely any complications.

(It is also theoretically possible to store missiles in space satellites and launch them at Earth. However such practices have been deemed illegal by the United Nations. An ordinary missile entering Earth from space will cause roughly the same amount of damage as a nuclear bomb, according to the Kinetic Bombardment Theory).

- Science and Discovery.

Satellites have the capability to carry scientific instruments through space, such as atmospheric readers, cameras and so on. These satellites roam space and beam images and scientific data back to Earth, enabling us to learn more about the planets in our solar system as well as about space itself.

- Navigation, Tracking and Mapping.

Satellites make it possible for us to have satellite navigation systems (better known as Global Positioning System, or GPS).

This enables us to have a device in our cars to tell us exactly where we need to go. They are also found in planes and ships to tell the pilots where they need to go and where they are.

Many new mobile phones have tracking devices in them, which is useful for parents who need to keep track of where their children are and to the police if a person goes missing.

The black boxes of aeroplanes (which believe it or not, are actually orange, not black) are embedded with a tracking device so it can be located after a plane crash, even if it ends up at the bottom of an ocean.

Tracking devices are also fitted to official, government and military vehicles for security reasons, such as preventing a bank van being hijacked or tracking a stolen military vehicle so jets can be sent in to destroy it.

Because of satellites, we now have access to a global map of the planet. We now know exactly what the planet looks like, providing us with the most accurate maps and atlases that have ever been produced before satellite mapping.

- Entertainment.

Yes, that's right, entertainment.

Satellites enable us to have satellite and digital television for everyday entertainment. Our daily and live television is beamed to us through satellites. Particularly if you live in the United Kingdom, where every television in the country is now digital.

Satellites also help digitally spread radio waves and even wireless internet.

The reason you can see friends on webcams from thousands of miles away, is mostly because of satellites feeding the webcam recording directly to your wireless router or internet modem.

- Weather, Meteorology, Geology and Climatology.

Satellites enable us to watch atmospheric changes in the Earth's atmosphere, enabling us to predict and forecast the weather.

They can also enable us to spot the early warning signs of a developing hurricane, for example, predict the path of the hurricane and organise evacuation of the areas that are going to be affected.

Satellites also enable us to scan the surface of the Earth for geological research and geological analysis. Particularly to predict when an active volcano is about to launch, to, again, organise evacuation.

Satellites also have the capability to forecast temperatures and gasses in our atmosphere. Which enables climatologists to update us about the progression of Global Warming on our planet.

- Earth's Shape and Earth's Distance.

Because of the shape of the Earth (sphere) and the vast size of the planet, it would normally be very difficult for ordinary wireless radio signals to reach one end of the globe to the other without receiving some form of interference. However, because of a system of satellites around the Earth these wireless signals, whether they be communication, television images and so on, can be bounced between the system of satellites and reach their required destination, without the normal interference that we would experience from wireless communication in the early 1900's.

There are of course some disadvantages to artificial satellites. They are very costly to launch and maintain. Abandoned satellites contribute to space junk making it dangerous for space shuttles to leave and enter the atmosphere. And so on.

However, the advantages of satellites far, far, outweigh the disadvantages.

Answer 2

No. Yes the metal satellites that we use around our planet are man made, but the word satellite means: --noun 1. Astronomy. a natural body that revolves around a planet; a moon.

2. a country under the domination or influence of another.

3. something, as a branch office or an off-campus facility of a university, that depends on, accompanies, or serves something else.

4. an attendant or follower of another person, often subservient or obsequious in manner.

5. a device designed to be launched into orbit around the earth, another planet, the sun, etc. --adjective 6. of, pertaining to, or constituting a satellite: the nation's new satellite program.

7. subordinate to another authority, outside power, or the like: summoned to a conference of satellite nations.

Answer 3

No satellite is stationary.

However, a few satellites travel in orbits that appear relatively motionless compared to other things.

IF a satellite is placed in an orbit with the proper major-axis, and IF the orbit is perfectly circular, and
IF the orbit is in the plane of the equator, then the satellite APPEARS stationary over a point on the equator.
Such a satellite is in a geostationary orbit (a kind of geosynchronous orbit), also called Clarke Orbit.
You can point a satellite dish at such a satellite and it will stay pointing at it, no motors needed.


A few observatory satellites are in orbits near the L1 Lagrange point.
From Earth, such satellites appear to stay nearly stationary relative to the sun.

Answer 4

At 35,786km is a special orbit for Geo-stationary satellites. Since they orbit the earth in the same time that it takes the earth to spin once on its axis, it means that the satellite can stay in roughly the same spot over the earth.

The main advantage is that they appear to stay in the same spot in the sky, meaning that satellite dishes can be fixed onto them, rather than having to track them accross the sky.

Their orbit is quite high, so they do not experience as much atmospheric drag - their orbits may be a lot more stable.

The main disadvantage is that it takes more energy to get them to this height, so more fuel is needed.

Another disadvantage of this special orbit, is that their may be loads of satellites, so the chances of a collision are increased.

Answer 5

The many uses of Satellite Technology include: TV, Internet, Cell Phone, and Radio Services, to collect and send data to NASA and Weather Stations across the World, and uses for Military Communications Applications, such as Global Command and Control Systems.

Answer 6

"Geosynchronous" only means it circles the Earth every 24 hours, but if it's not

also in an equatorial orbit, then it would appear to bob up and down, north and

south in the sky, every day.

I think you're really asking about "geostationary" orbit, which, in addition to

having a 24-hour period, is also over the equator, and appears motionless in

the sky.

The advantage is that anyone on the ground in the appropriate continent with

a satellite dish can mount the dish on a little tripod on their garage, and receive

signal from that satellite any time, 24/7/365. They don't need complicated and

expensive machinery to track the satellite and constantly move the dish to keep

it pointed at the bird.

Also, if the satellite moves in the sky, then for any individual person you choose,

that satellite will be down, set, not in his sky, for large portions of the time, and

the satellite is of no use to him.

If you place your satellite in an orbit that's not geosynchronous and geostationary,

then you should expect not too many paying customers to sign up for your

movie service.

Answer 7

Satellites let you do things not available by other methods. See related links for various types and uses of satellites.

Answer 8

Man-made satellites are used for communication, navigation, collecting information about changes seen from above, e.g. weather, military, and much more.

Answer 9

by satellites we can know about the things happening on earth at a time.

Answer 10

Man made satellietes is important because it used for communication,space exploration,observation of earth,and weather patterns