P4 Physics pg 94
- Created by: Abigail Swann
- Created on: 04-04-13 12:28
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- Satellites and Radio/microwaves
- Communication satellites stay over the same point on Earth
- Quite a high orbit over equator
- Stay above the same point
- because they stay at the same point, transfer signals from one side of the Earth to the over
- Some satellites are in low polar orbits
- In a low polar orbit, satellites moves over both poles while the Earth rotates
- They move faster because there is a stronger pull of gravity
- The whole surface of the Earth can be monitored
- Weather/Spying satellites need a low orbit
- Microwaves are used for satellite communication
- Signal from the transmitter is sent to space where its recieved by the dish
- The satellite dish transmits the signal to Earth where its recieved by a dish
- Or the signal is sent to other satellites
- Signal from the transmitter is sent to space where its recieved by the dish
- Microwaves have higher frequencies than radio waves
- Satellite signals weaken as they travel (from interfernce or loss of intensity)
- Digital signals are used as they're high quality
- Microwaves pass easily through the atmosphere to satellites
- Satellite signals weaken as they travel (from interfernce or loss of intensity)
- Communication satellites stay over the same point on Earth
- Geostationary artificial satellites, ideal for telephone, tv, radio
- Communication satellites stay over the same point on Earth
- Quite a high orbit over equator
- Stay above the same point
- because they stay at the same point, transfer signals from one side of the Earth to the over
- Communication satellites stay over the same point on Earth
- Microwaves are used for satellite communication
- Signal from the transmitter is sent to space where its recieved by the dish
- The satellite dish transmits the signal to Earth where its recieved by a dish
- Or the signal is sent to other satellites
- Signal from the transmitter is sent to space where its recieved by the dish
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