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242 | Simrad MX500

GDOP (Geometric Dilution of Precision)

An indicator of the accuracy in position (latitude, longi-

tude, altitude, and time). See DILUTION OF PRECISION.

GFSK

Gaussian-Filtered-Shift-Keying – A standardized method

of modulating digital data prior to transmission on a data

link.

GMSK

Gaussian-Minimum-Shift-Keying – GFSK using BT-

products and modulation index which optimizes the

modulated signal.

GNSS

Global Navigation Satellite System – A common label for

satellite navigation systems (such as GPS and GLONASS).

GLOBAL POSITIONING SYSTEM (GPS)

The NAVSTAR Global Positioning System, which consists

of orbiting satellites, a network of ground control sta-

tions, and user positioning and navigation equipment.

The system has 24 satellites plus 3 active spare satellites

in six orbital planes about 20,200 kilometers above the

earth.

GLONASS

A satellite navigation system developed and operated by

Russia.

GMT

Greenwich Mean Time. See also UNIVERSAL TIME

COORDINATED.

GPS LOG

A feature of the navigator that measures the sailed

distance based on the GPS signals rather than a water

distance sensor.

GPS SYSTEM TIME

Time corrected to Universal Time Coordinated (UTC) and

used as the time standard by the user segment of the

GPS system.

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Memorex RX 1 Smart Installationshandbuch Seite 243