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NAVIOR-24S
™
Appendix G
Glossary
224
NAVIOR-24S ™
Revision
V1.00 20.05.2008
relationship can be defined by six quantities, generally (but not
necessarily) the geodetic latitude, longitude, and the height of the origin,
the two components of the deflection of the vertical at the origin, and
the geodetic azimuth of a line from the origin to some other point. The
GPS uses WGS-84.
geoid
The actual physical shape of the earth which is hard to describe
mathematically because of the local surface irregularities and sea-land
variations. In geodetic terms it is the particular equipotential surface
which coincides with mean sea level, and which may be imagined to
extend through the continents. This surface is everywhere perpendicular
to the force of gravity.
GLONASS Russian
Federation’s
GLObal'naya NAvigatsionnaya
Sputnikovaya Sistema or GLObal NAvigation Satellite
System (GLONASS).
GPD
GPS with differential corrections applied.
GPS
Global Positioning System. A constellation of 24 radio navigation (not
communication) satellites which transmit signals used (by GPS
receivers) to determine precise location (position, velocity, and time)
solutions. GPS signals are available world-wide, 24 hours a day, in all
weather conditions. This system also includes 5 monitor ground
stations, 1 master control ground station, and 3 upload ground stations.
GPS antenna
An antenna designed to receive GPS radio navigation signals.
GPS processor
An electronic device that interprets the GPS radio navigation signals
(received by a GPS antenna) and determines a location solution. The
GPS processor may also be able to apply (and determine) differential
GPS corrections
GPS receiver
The combination of a GPS antenna and a GPS processor.
GPS time
The length of the second is fixed and is determined by primary atomic
frequency standards. Leap-seconds are not used, as they are in UTC.
Therefore, GPS time and UTC differ by a variable whole number of
seconds.
HDOP Horizontal
Dilution of Precision.
HOW
Handover word. The word in the GPS message that contains time
synchronization information for the transfer from C/A to P-code.
interface cable (serial)
The interface cable allows data to flow between the NAVIOR-24S and
the communication equipment. One end of the cable has a 9-pin female
RS-232 connector has a 9-pin male and the other end of this cable has a
9-pin female RS-232 connectors. interference Refers to the unwanted