NavCom RT-3020 Rev.A User Manual

Page 51

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RT-3020 User Guide

Glossary-49

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.


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

.


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 height above
ground of the

phase center

must be measured

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