How do you get a satellite into space?
How do satallites get signals from Earth?
- First, there's the uplink , where data is beamed up to the satellite from a ground station on Earth. Next, the satellite processes the data using a number of onboard transponders (radio receivers, amplifiers, and transmitters). These boost the incoming signals and change their frequency, so incoming signals don't get confused with outgoing ones.
How far are the GPS satellites from Earth?
- The GPS satellites circle the Earth at an altitude of about 20,000 km (12,427 miles) and complete two full orbits every day.
How many GPS satellites are around the Earth?
- There are 30 fully-functional global positioning system (GPS) satellites that are in orbit around Earth as of March 23, 2010.
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