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)

datum

Telecommunications; GPS (global positioning system)

A math model which depicts a part of the surface of the earth. Latitude and longitude lines on a paper map are referenced to a specific map datum. The map datum selected on a GPS receiver needs to ...

differential positioning

Telecommunications; GPS (global positioning system)

Also known as Relative Positioning. Precise measurement of the relative positions of two receivers tracking the same GPS signals. Maybe considered synonymous with DGPS, or the term may be reserved ...

distance

Telecommunications; GPS (global positioning system)

The length (in feet, meters, miles, etc.) between two waypoints or from your current position to a destination waypoint. This length can be measured in straight-line (rhumb line) or great-circle ...

dithering

Telecommunications; GPS (global positioning system)

The introduction of digital noise into the system. "Clock dithering" is the process by which the U.S. Department of Defense (DoD) degrades the accuracy of the Standard Positioning Service (i.e. ...

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.

doppler-aiding

Telecommunications; GPS (global positioning system)

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 ...