Flashcards in Global Positioning System Deck (6)
Receivers calculate distances to satellites as a function of the amount of time it takes for satellites to reach the ground D=s*t
Orbits are arranged so that at any time, anywhere on Earth, there are at least four satellites visible in the sky.
27 Solar Satellites, 24 in operation, 3 extra in case of failure
Orbits 12,000 miles
Receivers that decode the signals from the satellites
Task: Selecting satellites
acquiring GPS signals
Measuring and tracking
Recovering navigation data
Measures distances to satellite and send to the master control.
Determines: satellites orbits
health of satellites
-Send commands and data to the constellation