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Glossary – GLOBALSAT GH-625XT v3.0 User manual User Manual

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11.Glossary

GH-625XT

Activity

Relates to data being transmitted from GH-625. Activity is a history or log

of events. Activity data includes time or distance updates.

Waypoint

Waypoints are sets of coordinates that identify a point in physical space. For
the purposes of terrestrial navigation, these coordinates usually include
longitude and latitude, and sometimes altitude (particularly for air
navigation).

Trackpoint

The current moving trace.

Navigation

The act of determining the course or heading of movement.

2D Operating

Mode

A “two-dimensional GPS position fix” includes only horizontal coordinates.

It requires a minimum of three visible satellites.

3D Operating
Mode

A “three-dimensional GPS position fix” includes horizontal coordinates, plus

elevation. It requires a minimum of four visible satellites.

Weak Signal

GPS signal is weak (GPS is fixing).

Receiving

Can’t find GPS (GPS turned off or broken down).

WAAS/EGNOS

Wide Area Augmentation System / European Geostationary Navigation
Overlay Service. These are two satellite-based systems that can be used to
increase the accuracy of GPS position fixes.

IPX7

An IPX7 designation means the GPS case can withstand accidental

immersion in one meter of water for up to 30 minutes.

GMT

Greenwich Mean Time (GMT) is a term originally referring to mean solar
time at the Royal Observatory, Greenwich in England. It is now often used
to refer to Coordinated Universal Time (UTC) when this is viewed as a time
zone, although strictly UTC is an atomic time scale which only approximates
GMT in the old sense. It is also used to refer to Universal Time (UT), which
is the astronomical concept that directly replaced the original GMT.

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