Leica Geosystems GPS Basics - Manual (Page 57)

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GPS Basics -1.0.0en Glossary
Sidereal day
Time interval between two successive
upper transits of the vernal equinox.
Site
A location where a receiver has been
setup to determine coordinates.
Space segment
The part of the whole GPS system that is
in space, i.e. the satellites.
Solar day
Time interval between two successive
upper transits of the Sun.
Squared reception mode
A method used for tracking GPS L2
signals which doubles the carrier
frequency and does not use the P-code.
Squaring-type channel
A GPS receiver channel which multiplies
the received signal by itself to obtain a
second harmonic of the carrier which
does not contain the code modulation.
Standard positioning service (SPS)
Level of point positioning accuracy
provided by GPS based on the single-
frequency C/A - code.
Static Survey
The expression static survey is used in
connection with GPS for all non-kine-
matic survey applications. This includes
the following operation modes:
• Static survey
• Rapid static survey
Stop & Go Survey
The term Stop & Go survey is used in
connection with GPS for a special kind of
kinematic survey. After initialization
(determination of ambiguities) on the
first site, the roving receiver has to be
moved between the other sites without
loosing lock to the satellite signal. Only
a few epochs are then necessary on
these sites to get a solution with survey
accuracy. Once loss of lock occurred, a
new initialization has to be done.
Time Zone
Time zone = Local Time - Greenwich
Mean Time (GMT). Note that Greenwich
Mean Time is approximately equal to
GPS time.
Topography
The form of the land of a particular
region.