Apollo SL50 Guide de l'utilisateur télécharger pdf (Page 121)

Glossary of Navigation Terms

A Altitude (GPS ALT): Altitude, as calculated by the

Apollo SL50/60, based upon a mathematical model

of the earth’s surface curvature. A substantial

difference between this altitude value and altitude

referenced to sea level may exist.

Almanac: Data transmitted by a GPS satellite

including orbit information on all satellites, clock

correction, and atmospheric delays.

Automatic Terminal Information Service

(ATIS): Recorded information about weather and

other conditions at an airport, periodically updated

when conditions change.

Autonav: The function that allows you to set the

SL50/60 to scroll automatically through selected

navigation displays .

Azimuth: an arc, as measured clockwise from true

or magnetic north.

B Bearing (BRG):The direction to any point, usually

measured in degrees relative to true or magnetic

north.

C Circular Error Probable (CEP): As applied to

GPS position fix accuracy, the radius of a circle

inside of which there exists a 50 percent chance of

being located.

Constellation: A group of stars or objects, such as

GPS satellites, in the heavens.

Coordinates:Values for latitude and longitude that

describe a geographical point on the surface of the

earth.

Course: The planned direction of travel between

the departure and destination waypoints.

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Glossary of Navigation Terms

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Apollo SL50 Guide de l'utilisateur Page 121