- 産業: Telecommunications
- Number of terms: 1485
- Number of blossaries: 0
- Company Profile:
Garmin designs, develops, manufactures and markets a diverse family of hand-held, portable and fixed-mount GPS-enabled products and other navigation, communications and information products for the general aviation and consumer markets.
An extension of the GPS system that uses land-based radio beacons to transmit position corrections to GPS receivers. DGPS reduces the effect of selective availability, propagation delay, etc. and can improve position accuracy to better than 10 meters.
Industry:Telecommunications
A measure of how close an estimate of a GPS position is to the true location.
Industry:Telecommunications
The time it takes a GPS receiver to acquire satellite signals and determine the initial position.
Industry:Telecommunications
An antenna that amplifies the GPS signal before sending it to the receiver.
Industry:Telecommunications
The segment of a route currently being traveled. A "segment" is that portion of a route between any two waypoints in the route.
Industry:Telecommunications
Information transmitted by each satellite on the orbits and state (health) of every satellite in the GPS constellation. Almanac data allows the GPS receiver to rapidly acquire satellites shortly after it is turned on.
Industry:Telecommunications
An instrument for determining elevation, especially an aneroid barometer used in aircraft that senses pressure changes accompanying changes in altitude. The Garmin® eTrex® Vista and Summit models contain a basic GPS with a built-in barometric altimeter.
Industry:Telecommunications
The principal feature of analog signals is that they are continuous. In contrast, digital signals consist of values measured at discrete intervals.
Industry:Telecommunications
Encryption of the P-code to protect the P-signals from being "spoofed" through the transmission of false GPS signals by an adversary.
Industry:Telecommunications
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.
Industry:Telecommunications
