navigation acronyms, abbreviations and definitions - International ...

PPS-SM PPS Security Mode/Module
PPU pilot portable unit (marine)
PR banks (met)
PR pseudo-range (GPS)
Range measured between a rx and GPS sat, including all errors & bias.
PRARE precise range and range-rate equipment (marine)
PRC Perfomance Review Commission (EUROCONTROL)
PRC primary reference clock
PRC pseudo-range correction
precision The accuracy of a measurement or a position with respect to random
errors (IMO).
Precision Approach A standard instrument approach procedure in which both horizontal
and glidepath/slope guidance is given.
PRESERVE Preparing Secure Vehicle-to-Infrastructure Communication Systems
EU research project launched Feb 11.
PReVENT EU IP for preventive & active safety systems (DG Info Society)
PRF pulse repetition frequency
PRI pilot receiving instruction (US air)
PRIMAR The formal service delivered by RENCs (established 1999)
Primary Means of
Navigation
Airborne nav system that must meet accuracy and integrity
requirements but need not meet full availability or continuity-ofservice
requirements.
Prime meridian Reference meridian 000º; origin for measurement of longitude
Also known as the Greenwich Meridian. The most enduring definition
was by Sir George Airy in 1851; this has been replaced by that of WGS
-84, which is about 102 metres to the east.
PRM preferred route message (North Alantic ATC)
PRN pseudorandom noise (code)
Deterministic binary sequences with noise-like properties, also called
pseudonoise codes. Used in spread-spectrum comms and ranging
transmissions. GPS C/A and P-Code are PRN codes.
PRNAV precision RNAV for terminal areas (ICAO)
PROB probability (met)
ProGIS Promoting Geographic Information Systems (Finnish AGI)
PRoGRESS Urban RUC demo & research project (EU-funded)
PROMISE Pre-operational Modelling in the Seas of Europe (EU MAST III proj)
PROVESS Processes of Vertical Exchange in Shelf Seas (EU MAST III proj)
PRR pseudo-range rate
PRS primary reference source (eg ANSI Stratum 1, GPS or eLoran)
PRS Public Regulated Service (Galileo)
Uses OS plus 2 encrypted signals giving controlled access and high
continuity. The ‘military’ signal.
PRT personal rapid transit
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