Glossary - NorthStar 951X Operator's Manual

Glossary

accuracy
absolute accuracy—the accuracy of displayed lat/lon coordi-
nates of your present position as compared to lat/lon deter-
mined 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
The procedure during which a GPS receiver attempts to track
satellites before a position fix can be computed.
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's turned on. Thereafter, it can
usually use the almanac data collected previously.
cartography
The art or technique of making maps or charts.
chain
A group of loran transmitters comprised of a master station
and at least two secondaries.
coverage
The extent to which a geographical area is encompassed by
usable GPS or loran signals.
cursor
The display panel indicator that shows which character or
character field is ready to be changed, acknowledged, or
entered by the user. It's activated and positioned by the user
when required. The unit's cursor appears as an arrow or a
flashing block, depending on whether you're choosing or
entering data.
ephemeris
Data used to calculate exact satellite positions, continually
updated and derived from information relayed to the 951/952
in each satellite's data stream.
ETA
Estimated Time of Arrival at the next waypoint, as calculated
by the 951/952 according to your present speed of advance
(SOA) and distance to the waypoint.
ETE
Estimated Time Enroute to the next waypoint, as calculated by
the 951/952 according to your present speed of advance (SOA)
and distance to the waypoint.
951/952 Operator's Manual Rev. B Page 179