GPS (global positioning system)

GPS (global positioning system)

Of or referring to a space based navigation system that provides location, time, and weather conditions on earth.

Industry: Telecommunications

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GPS (global positioning system)

Atomic clock

Telecommunications; GPS (global positioning system)

A very precise clock that operates using the elements cesium or rubidium. A cesium clock has an error of one second per million years. GPS satellites contain multiple cesium and rubidium clocks.

Doppler shift

Telecommunications; GPS (global positioning system)

The apparent change in the frequency of a signal caused by the relative motion of the transmitter and receiver.

A signal processing strategy that uses a measured Doppler Shift to help the receiver smoothly track the GPS signal. This allows for more precise velocity and position determination, especially when ...

Double-difference

Telecommunications; GPS (global positioning system)

A data processing procedure by which the pseudo-range or carrier phase measurements made simultaneously by two GPS receivers are combined so that, for any measurement epoch, the observations from one ...

Downlink

Telecommunications; GPS (global positioning system)

A transmission path for the communication of signals and data from a communications satellite or other space vehicle to the earth.

Dual-frequency

Telecommunications; GPS (global positioning system)

Refers to the instrumentation that can make measurements on both L-Band frequencies, or to the measurements themselves (e.g., L1 and L2 pseudo-range or carrier phase measurements). Dual-frequency ...