NavCom SF-3050 Rev.A - Manual (Page 157)

SF-3050 User Guide – Rev A
Glossary-155
dual-freque
both L1 and ncy a type of GPS receiver that uses
L2 signals from GPS satellites. A dual-
ensates for
y
enabled
2MHz.
uency a L-Band carrier to be used
own
nventional terrestrial" system.
at
e to
frequency receiver can compute more precise
position fixes over longer distances and under more
adverse conditions because it comp
ionospheric delays. The SF-3050 is a multi-frequenc
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
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 1575.4
E5A carrier freq
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 kn
as a "co
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,
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 relativ
the WGS-84 ellipsoid. An ellipsoid has a smooth
surface, which does not match the earth’s geoidal