Asus R300 User Manual page 165

Elevation: When the GPS receiver can see at least four GPS satellites, it can determine
its current position in three dimensions. In this case the elevation is calculated together
with the latitude/longitude position. Note that some older GPS units may provide incorrect
elevation data because they use a simple ellipsoidal earth model rather than a database
that contains local sea levels. You should also be aware that the elevation value is
generally less accurate (by at least a factor of 2) than the horizontal position. See also
2D/3D GPS Reception.
ETA (Estimated Time of Arrival): A frequently used expression in navigation. It represents
the time when you will reach your destination based upon calculations using the remaining
part of the route and available information of the roads used. This estimation can only
be used as a general reference. It will not be able to take into account your future speed
or the traffic delays. In ASUS GO this value is shown as 'Estimated Arrival' on the Route
Information screen.
ETE (Estimated Time Enroute): Another frequently used expression in navigation. It
represents the time needed to reach your destination based upon calculations using the
remaining part of the route and available information of the roads used. This estimation
can be used only as a general reference. It will not be able to take into account your future
speed or the traffic delays. In ASUS GO this value is shown as 'Time left' on the Route
Information screen.
GPS: Abbreviation of Global Positioning System. This system is operated by the DoD
(the Department of Defense of the Unites States Government). It consists of 24 satellites
orbiting Earth, and several ground stations to keep the satellites in sync. To calculate your
position, your GPS device uses the signals received from those GPS satellites that are
currently visible at your location. You can use this service free of charge.
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