NavCom SF-3040 Rev.F - Manual (Page 211)

SF-3040 Product User Guide
– Rev. F
Glossary-209
MSAS (MTSAT Satellite-based Augmentation
System) a Japanese satellite system that provides a
set of corrections for the GPS satellites, which are
valid for the Japanese region. They incorporate
satellite orbit and clock corrections.
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.
PN 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.