NorthStar MX500 Operator's & Installation Manual page 262

Operator's Manual
FILTER TIME
FLUX GATE COMPASS
FM
FORCE HEALTHY
FORCE UNHEALTHY
FUNCTION
FUNCTION KEY
GEODETIC
248
If the GPS signals are distorted by Selective Availability (S/A) the
COG and SOG readings will be unstable, especially at low speeds.
In order to smooth out the readings you can adjust the COG/SOG
filter time (CFG 1, COG SOG)
A magnetic compass sensor without needle or card, whose two- or
three-phase sinusoidal output is a heading reference. Interfaced to
the navigator via the NMEA interface.
Frequency Modulation – The method by which a signal offsets
the frequency in order to modulate it on a data link.
A feature of the navigator that permits the user to override the data
flag in the almanac that tells the navigator that the quality of the
data from a satellite is inadequate for navigation. This feature
should be used only with the greatest care.
A feature of the navigator that permits the operator to inhibit a
satellite position update even though the quality of the data from
that satellite apparently is acceptable.
A specific operational capability of the navigator.
A key on the front panel of the navigator that selects a specific
function.
Associated with the science of Geodesy, which includes the means
of determining absolute position with uniform accuracy at all points
on the Earth's surface.
Glossary
Version 3.0