2050
User Guide
lat
see latitude.
latitude (lat)
the north/south component of the coordinate of a point on the surface on the earth;
expressed in angular measurement from the plane of the equator to a line from the center of the
earth to the point of interest. Often abbreviated as Lat.
LED
acronym for Light Emitting Diode
LEMO
a type of connector.
LES
Land Earth Station
the point on the earth’s surface where data is up linked to a satellite.
logging interval
the frequency at which positions generated by the receiver are logged to
data files
long
see longitude.
longitude (
long
)
the east/west component of the coordinate of a point on the surface of the earth;
expressed as an angular measurement from the plane that passes through the earth’s axis of
rotation and the 0°
meridian
and the plane that passes through the axis of rotation and the point of
interest. Often abbreviated as
Long
.
Mean Sea Level (
MSL
)
a vertical surface that represents sea level.
meridian
one of the lines joining the north and south poles at right angles to the equator, designated
by degrees of longitude, from 0° at Greenwich to 180°.
meteorological (.YYm) files
one of the three file types that make up the
RINEX
file format. Where
YY indicates the last two digits of the year the data was collected. A meteorological file contains
atmospheric information.
MSL
see
Mean sea level
multipath error
a positioning error resulting from interference between radio waves that has
traveled between the transmitter and the receiver by two paths of different electrical lengths.
navigation (.YYn) files
one of the three file types that make up the
RINEX
file format. Where YY
indicates the last two digits of the year the data was collected. A navigation file contains satellite
position
and time information.
observation (.YYo) files
one of the three file types that make up the
RINEX
file format. Where YY
indicates the last two digits of the year the data was collected. An observation file contains raw
GPS
position
information.
C&C P/N
Part Number
P-code
the extremely long pseudo-random code generated by a
GPS
satellite. It is intended for use
only by the U.S. military, so it can be encrypted to Y-code deny unauthorized users access.
parity
a method of detecting communication errors by adding an extra parity bit to a group of bits.
The parity bit can be a 0 or 1 value so that every byte will add up to an odd or even number
(depending on whether odd or even parity is chosen).
PDA
Personal Digital Assistant
PDOP
see
Position
Dilution of Precision
.
Glossary-64
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