Accession Number : ADA180987

Title :   Mode S Data Link Phrase Coding: Further Development of the Phrase Source Language,

Corporate Author : ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (ENGLAND)

Personal Author(s) : Humphrey,P. T. ; Larkin,R. J.

Report Date : MAY 1986

Pagination or Media Count : 34

Abstract : During the course of the data link research at RSRE an experimental phrase source language was devised which followed the pattern suggested for Mode-S in International Civil Aviation Organization (ICAO) SSR Improvements and Collision Avoidance Systems Panel (SICASP). This was published and presented to SICASP Working Group 3 in January 1986 where it was accepted as the basis for the Phrase Source Language (PSL) to be incorporated in the SARPS (Standards and Recommended Practices). Since that time there have been further developments which have arisen from practical study of applications for such a language. In particular it has become apparent that more complex phrases than were first envisaged will need to be encoded and so new features have been suggested. Contents--The Language Design: Operator Name Changes, To display Operator Field Value, Output Operator, A Macro Structure, Variable Length Variables, Repeat Loops, Commentary on the VOLMET Example; Language Features for Consideration: Fixed Bit Position Formats, Machine Readable Variables.

Descriptors :   *DATA TRANSMISSION SYSTEMS, *PROGRAMMING LANGUAGES, CIVIL AVIATION, COLLISION AVOIDANCE, DATA LINKS, FORMATS, INTERNATIONAL, LANGUAGE, LENGTH, OPERATORS(PERSONNEL), OUTPUT, PANELS, POSITION(LOCATION), SOURCES, VARIABLES, MESSAGE PROCESSING, METEOROLOGICAL DATA, GREAT BRITAIN

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE