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Rob Verdann,
Afterdark Removalist
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Each GPS satellite transmits a signal down to Earth where it can be received by anyone with a GPS radio receiver.
A GPS receiver that can simultaneously track more than one satellite signal using a dedicated signal electronics channel for each satellite.
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Dave Simons,
Internet Entrepeneur
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These satellite navigation systems use GPS technology coupled with street level mapping and routing capabilities.
GPS functionality on phone uses global positioning satellites to calculate worker location.
Navtrak utilizes GPS satellites to communicate vehicle speed and position to small boxes called mobile managers which are installed in your vehicles.
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Dan Toomey,
Computer Salesman
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GPS is a dual-use, satellite-based system that provides accurate location and timing data to users worldwide.
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Arthur Dawkins,
Astro-physicist
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The GPS concept is predicated upon accurate and continuous knowledge of the spatial position of each satellite in the system with respect to time and distance from a transmitting satellite to the user.
GPS receivers with antennas located in a position to clearly view the satellites pick up these signals and use the coded information to calculate a position in an earth coordinate system.
A GPS unit incorporates relativistically corrected time calculations in its analysis of signals received from orbiting satellites.
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Josh Hogan,
Commander
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GPS is a worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations.
The GPS satellites are owned and controlled by the US Department of Defence and this agency has the perogative to degrade the accuracy for purposes of national defence.
A GPS unit works by simultaneously receiving signals from a number of satellites circling the earth and calculating the position and the altitude of the unit.
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