NavCom RT-3020 Rev.A - Manual (Page 52)

RT-3020 User Guide
Glossary-50
accurately to ensure accurate GPS readings. The phase
center height can be calculated by adding the height to
an easily measured point, such as the base of the
antenna mount, to the known distance between this
point and the
phase center .
Position the latitude, longitude, and
altitude of a point.
An estimate of error is often associated with a position .
Position Dilution of Precision (PDOP) a measure of
the magnitude of Dilution of Position (
DOP ) errors in
the x, y, and z coordinates.
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 same period of time. Variations in the position
reported by the reference station can be used to correct
the positions logged by the roving receiver . Post-
processing is performed after you have collected the
data and returned to the office, rather than in real time
as you log the data, so it can use complex, calculations
to achieve greater accuracy.
Precise code see
P-code .
PRN (Uppercase) typically indicates a
GPS satellite
number sequence from 1 – 32.
prn (Lower Case) see Pseudorandom Noise.
Protected code
see P-code .
Proprietary commands those messages sent to and
received from
GPS equipment produced by NavCom
Technology, Inc. own copyrighted binary language.