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Satellites transmit signals using highly directional electromagnetic waves.
Electromagnetic waves are used all the time in today's technology; microwaves use microwaves which are the same as mobile phones, televisions use ultrahigh frequency waves, visible light is in fact electromagnetic waves.....
Where our mobile phones use multi-directional antenna satellites use parabolic dishes to produce unidirectional signals which are transmitted to receiver stations on the earth. A sky box is an example of one such receiver where only a download link can be established, i.e you cannot use your set top box to control the satellite.
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In Addition (added by another user)
Microwaves are used because their wavelength is long and thin, they don't refract much making them accurate. Furthermore, radio waves cannot be used as when under 30 MHz they reflect of the ionosphere and if they are above, their wavelength makes them refract too much. Strong signal strengths are needed as when above 30 GHz things like rain, dust etc reduce signal strength.
Hope this helped.
What else can I help you with?
Why is solar flare important?
they send magnetic energy which can effect the radio waves, television satellites, cellphone satellites, and different things like that on earth.
Why is the moon call the naturail sattilite?
Because the moon orbits the earth just like the satellites we send in space do.
Does the Earth have more natural or more artificial satellites?
Earth has one natural satellite and more than a thousand artificial satellites.
Which plant has fewer satellites earth or Uranus?
i meant planet Earth has fewer because Earth has only 1 satellite and Uranus has 27 satellites.
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 do television satellites work?
there are satellite transmitters in space that send singnals to earth
How do satellites get the weather?
Satellites take pictures and accumulate other information into the computer. They analyze the data and send it back to weather stations on earth.
Why do weather satellites orbit closer to the earth than other types?
Those satellites be closer to earth than other satellites because then it can find out about earth's weather because if it's close to earth then it get in the way of weather so it can send message about the weather faster than others
Where do artificial satellites come from?
Artificial satellites come from all over the world. Each country send their own satellites into space.
Why is solar flare important?
they send magnetic energy which can effect the radio waves, television satellites, cellphone satellites, and different things like that on earth.
What does orbiting satellites that send radio signals to a receiver on Earth make up?
GPS system
Why is the moon call the naturail sattilite?
Because the moon orbits the earth just like the satellites we send in space do.
What are the artificial satellites of the Earth?
All the satellites, communications, exploratory, military etc. are artificial satellites of Earth.
What direction do we send out satellites?
Up.
How do satellites send images and data back from space?
Satellites send images and data back to Earth using radio waves. The satellite collects the information with its sensors and cameras, processes it, and then transmits it to ground stations on Earth. The ground stations receive the data and images, often through large antennas that are pointed at the satellite as it passes overhead.
Does the earth have two satellites or Mars?
Mars has two natural satellites. Earth has one.
How does the gps update stores locations?
Satellites orbiting around earth send information to the GPS , so they detect the change & fix it in their memory.
