EMTAC CRUX II BTGPS, Руководство пользователя

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Glossary
Almanac data
A set of information that transmitted by each satellite on the orbits and state of every
satellite in the GPS constellation. Each GPS satellite contains and transmits the
almanac data set for the entire GPS satellite system network. Almanac data allows the
GPS receiver to rapidly acquire satellites shortly after it is turned on.
ACTIVE ANTENNA
An antenna that amplifies the GPS signal before it sends it to the receiver.
Altitude
The distance between the current position and the nearest point on WGS 84 reference
ellipsoid, usually it is expressed in meters or feet and is positive outside the ellipsoid.
Baud
Bits per second. Also referred to as a baud rate.
Channel
Channel refers to a set of hardware in the receiver that detects locks on and
continuously tracks the signal from a single GPS satellite. The more channels available,
the greater number of GPS satellite’s signals a receiver can simultaneously lock and
track. A receiver of 12 channels is the optimized design, considering the current
consumption, chip-package size and cost.
CEP - Circular Error Probable
CEP is the radius of a circle, centered at a true location, within which fifty percent of
positioning solutions fall. CEP is used to achieve horizontal accuracy.
C/N
o
Carrier-to-Noise density ratio. An indication of satellite signal strength received by the
GPS receiver.
COLD START
A condition in which the GPS receiver can arrive at a navigation solution without initial
position, time, current Ephemeris, and almanac data.