NavCom SF-3050 Rev.A - Manual (Page 163)

SF-3050 User Guide – Rev A
Glossary-161
parity a method of detecting communication err
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
ors by
Position Dilution of Precision.
height
ed
nter height can be calculated by adding the
e
en
a
error is often associated with a
easure of
errors in
the same period of time. Variations in
ormed after you have
he office, rather
PDOP mask the highest PDOP value at which a
receiver computes positions.
phase center the point in an antenna where the
GPS signal from the satellites is received. The
above ground of the phase center must be measur
accurately to ensure accurate GPS readings. The
phase ce
height to an easily measured point, such as the bas
of the antenna mount, to the known distance betwe
this point and the phase center.
Position the latitude, longitude, and altitude of
point. An estimate of
position.
Position Dilution of Precision (PDOP) a m
the magnitude of Dilution of Position (DOP)
the x, y, and z coordinates.
Positronic a type of data or power connector.
Post-processing a method of differential data
correction, which compares data logged from a
known reference point to data logged by a roving
receiver over
the position reported by the reference station can be
used to correct the positions logged by the roving
receiver. Post-processing is perf
collected the data and returned to t
than in real time as you log the data, so it can use
complex, calculations to achieve greater accuracy.