Leica apMK12, Operation & Installation Manual

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188 Version 1.5
Operation & Installation Manual Glossary
EPHEMERIDES (Singular: EPHEMERIS)
Tabulations of accurate data describing celestial position and
health of the satellites over a 24-hour period. The data is up-loaded
to the satellites every 12 hours.
ETA
Estimated Time of Arrival. Calculated on basis of the distance to
the destination and the current (or estimated) speed.
F ILTER TIME
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)
FLUX GATE COMPASS
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.
FORCE HEALTHY
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.
FORCE UNHEALTHY
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.
FUNCTION
A specific operational capability of the navigator.
FUNCTION KEY
A key on the front panel of the navigator that selects a specific
function.
G EODETIC
Associated with the science of Geodesy, which includes the means
of determining absolute position with uniform accuracy at all points
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