Technical data

Tables
NMEA National Marine Electronics Association.
NMEA 0183 A serial communication standard defining hardware
compatibility, message formats, and a range of standard
messages.
OTF ability to resolve integer carrier phase ambiguities in real-time
while moving.
n.mile International Nautical Mile (1852 meters; 6076.1 feet, 1.15
statute miles).
ns, nSec Nanosecond, one thousandth of a microsecond (i.e. 10
-
second)
9
PC Personal Computer (IBM compatible)
PCB Printed circuit Board
P-code The Precise (or Protected) GPS code - not available to civil
users.
PDOP Position Dilution of Precision, including horizontal and vertical
components.
pps, PPS Pulse per Second, and Precise Positioning Service
PRN Pseudo-Random Noise code unique to each satellite’s message
and therefore used to identify each satellite.
Pseudo Range The apparent measured ‘straight line’ distance from a satellite
to the receiving antenna at any instant in time, including any
errors caused by satellite clocks, receiver clocks, refraction of
the radio waves, etc.
PSU Power Supply Unit
RAM Random Access Memory
Real Numbers Numbers which may have decimal point and fractional
component
Resolution Smallest separation of two display elements
GPS Timing Receiver Installation and Operation Manual
E-5