Memorex RX 1 Smart Manual de Instalação descarregar pdf (Página 249)

248 | Simrad MX500

PSEUDORANDOM NUMBER (PRN)

The identification number of a GPS satellite.

PSEUDO-RANGE

Range that includes errors due to clock offset.

PSP

Presentation System Port – A communication port on the

AIS transponder used as an interface to external sys-

tems, i.e. the MX420.

PULSE SPEED SENSOR

Speed log whose speed output signal is defined by a

pulse rate output.

RANGE RESIDUAL

The difference between the expected satellite range and

the measured satellite range for the last measurement

taken from each satellite in the constellation.

RATDMA

Random Access Time Division Multiple Access – Access

protocol for transmissions which have not been pre-

announced. This is used for the first transmission during

data link network entry or for messages of non-repeat-

able character.

REFERENCE COMPASS

The compass against which the steering compass (see

STEERING COMPASS) may be calibrated.

REFERENCE ELLIPSOID

A mathematical description of the Earth’s ellipsoidal

shape (see ELLIPSOID), which is the reference frame for

positioning computation.

REFERENCE GPS MONITOR

A GPS CDU whose precise (surveyed) position is known.

It compares its own GPS position solution to the sur-

veyed position and generates correction values as a

function of the position coordinate differentials. The cor-

rection values are transmitted to user GPS CDUs for use

as corrections to their own GPS position solutions.

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Memorex RX 1 Smart Manual de Instalação Página 249