Leica MX400 Operating Instructions Manual page 219

Operator's Manual
MOTION DYNAMICS
Characteristics of changes in attitude and location of a moving
object according to its application and/or environment. For
example, vessels at sea in rough waters may have low forward
velocity but high-rate, short-term changes in attitude due to yaw,
pitch and roll.
NAVIGATION SOLUTION
The mathematical derivation of navigation components (for
example, speed, heading, set, drift) from a series of satellite
position updates plotted over time.
NMEA
National Marine Electronics Association. The NMEA electron-
ics interface specifications have been developed under the
auspices of the Association. The NMEA 0183 is an internation-
ally recognized specification for interfacing marine electronics.
NMEA 0183 version 2.1 is identical to IEC 1162-1.
PARALLEL
The perimeter of a parallel plane in the earth's ellipsoid. The
parallels define latitude. A special case parallel is the equator,
whose latitude is 0 degrees and to which all other parallels are
referenced.
PARITY BIT
A bit added to, or subtracted from, a binary coded message for
parity checking purposes.
PARITY CHECK
A simple statistical operation performed by the software that
monitors binary coded data being transmitted to verify that the
received message is the same as the transmitted message.
PARITY CONVENTION
In checking message parity (refer to PARITY CHECK), the
software may be designed to check either odd parity or even
parity. The choice is called parity convention: either odd or
even parity convention. Under odd parity convention rule, the
binary-coded message has the parity bit set to make up an odd
number of message bits. Under even parity convention rules,
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Glossary
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