Filter
Top Products
Rev. D Glossary
GlossaryGlossary
Glossary Page 135
GLOSSARY
accuracy
accuracyaccuracy
accuracy:
absolute accuracy
—the accuracy of displayed lat/long coordi-
nates of your present position as compared to lat/long determined
from a chart or other reference source.
repeatable accuracy
—the ability to return to the same location
using a receiver’s previously-obtained coordinates.
acquisition
acquisitionacquisition
acquisition: The procedure during which a GPS receiver attempts to
track satellites before a position fix can be computed.
almanac
almanacalmanac
almanac: Data describing the precise orbits of GPS satellites, obtained
automatically from satellite signals and stored in a GPS receiver.
The receiver requires about 15 minutes to collect almanac data the
first time it is turned on. Thereafter, it can usually use the alma-
nac data collected previously.
chain
chainchain
chain: A group of loran transmitters comprised of a master station and
at least two secondaries.
coverage
coveragecoverage
coverage: The extent to which a geographical area is encompassed by
usable GPS or loran signals.
cursor
cursorcursor
cursor: The display panel indicator that shows which character or char-
acter field is ready to be changed, acknowledged, or entered by
the user. It is activated and positioned by the user when required.
The 941X’s cursor will appear as an arrow or a flashing block, de-
pending on whether you are choosing or entering data.
ephemeris
ephemerisephemeris
ephemeris: Data used to calculate exact satellite positions, continually
updated and derived from information relayed to the 941X in each
satellite’s data stream.