- Characteristics
- Orbiting objects that receive, amplify and transmit signals
- Use radio frequencies to communicate with ground stations
- Require line of sight between satellite and receiver
- Uses
- Determine location, speed and time using satellite signals
- Provides turn-by-turn directions for travel
- Collect, analyse and display spatial data
- Satellite television
- Broadcast TV signals via satellite
- Satellite phone
- Provide communication in remote areas
- Global Positioning Systems (GPS)
- Satellite navigation
- Geographic Information Systems (GIS)
- Media communication systems
How does sat nav work?
- The position/location of the car is calculated using GPS software
- Data is transmitted every few seconds
- An algorithm calculates the speed/location of the car
- The map is updated every few seconds
