NavCom SF-3050 Rev.B - Manual (Page 189)

SF-3050 User Guide – Rev B
dual-frequency a type of GPS receiver that uses
both L1 and L2 signals from GPS satellites. A dual-
frequency receiver can compute more precise
position fixes over longer distances and under more
adverse conditions because it compensates for
ionospheric delays. The SF-3050 is a multi-frequency
GNSS receiver.
dynamic mode when a GPS receiver operates in
dynamic mode, it assumes that it is in motion and
certain algorithms for GPS position fixing are enabled
in order to calculate a tighter position fix.
E1 carrier frequency a L-Band carrier to be used by
Galileo satellites to transmit satellite data. The
frequency is 1575.42MHz.
E5A carrier frequency a L-Band carrier to be used
by Galileo satellites to transmit satellite data. The
frequency is 1176.45MHz.
ECEF (Earth Centered Earth Fixed) a Cartesian
coordinate system used for GPS, sometimes known
as a "conventional terrestrial" system.
EGNOS (European Geostationary Navigation
Overlay Service) a European satellite system used
to augment the two military satellite navigation
systems now operating, the US GPS and Russian
GLONASS systems.
elevation distance above or below Local Vertical
Datum.
elevation mask the lowest elevation, in degrees, at
which a receiver can track a satellite. Measured from
the horizon to zenith, 0º to 90º.
ellipsoid a mathematical figure approximating the
earth’s surface, generated by rotating an ellipse on its
minor axis. GPS positions are computed relative to
the WGS-84 ellipsoid. An ellipsoid has a smooth
surface, which does not match the earth’s geoidal
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