This Software Requirements Specification (SRS) is for an Air Traffic Control (<ATC>) Radar Data Processing System (<RDPS>). The purpose of this document is to translate the high-level statement of customer’s need into software requirements, including both functional and non-functional requirements.

1.1 Purpose

The purpose of the <RDPS> is to help maintain the safety of the airspace that is monitored by radar. It helps to coordinate the flight paths of aircraft in its range in order to prevent collisions, as well as monitor the airspace for unidentified objects that may be hazardous to aircraft, in an error-tolerant manner.

1.2 Scope

This document has the following objectives:

1. Identify the functional requirements of the <RDPS> (section 3 of this document);

2. Identify the non-functional requirements of the <RDPS> with respect to performance, safety, security and software quality attributes (section 4)

1.3 Data Dictionary

This section defines the terminology used in this document.

1.3.1 Definitions and Acronyms

Adaptation data	data used to initialize the system at startup
Air traffic controller	person who coordinates the movement of air traffic to make certain that planes stay a safe distance apart
ATC	Air Traffic Control
Coast out	event in which a track exceeds the <coasting period>
Coasting	the state in which a <track> becomes when radar reports are no longer correlated with it
Coasting period	duration of time when the <RDPS> does a coating action on a <track> when <radar reports> are no longer correlated to the <track>.
Correlation	to relate a <radar report> to an exiting <track>
Data elements	it is used to associate with <track update output message>
Dynamic resource management policy	a resource management policy in which resources are evaluated and allocated at run time
Established track	a <track> that has been successfully correlated to a <radar report>.
Flight coordinator	person who coordinates the flights based on <radar reports> and <track> output messages.
Latitude	a number that indicates the latitude of the current <track> position
LED	Light Emitting Diode
Longitude	a number that indicates the longitude of the current <track> position
MDC	Multiple Discrete Codes
MDC status	When two or more <tracks> have been updated by different <radar reports> transmitting the same <Mode A SSR code>, the value of the <MDC status> will be set to "true", "false" otherwise.
Mode A SSR code	a four digit octal number transponded by an aircraft
Mode A SSR code status	the status of a <track> indicating whether the aircraft has a <Mode A SSR code>.
Mode C altitude	altitude information transponded by an aircraft derived from the air pressure sensed by the aircraft.
Mode C altitude status	the status of a <track> indicating whether the aircraft has a <Mode C Altitude>.
MSA	Minimum Safe Altitude
MSAW	Minimum Safe Altitude Warning
MSAW status	If flying over a congested area of a city, town or settlement, and over any open air assembly of persons, if an altitude of 1000 feet above the highest obstacle within a horizontal radius of 2000 feet of the aircraft is not maintained, the <MSAW status> will be set to "true", "false" otherwise.
Pending State	A state whereby any further transmissions of the same <SCC status> from the same plane is ignored for a <pending time VSP> period.
Primary processor	the main processor that the <RDPS> runs on
PSR	Primary Surveillance Radar
PSR-only	one of the modes of the radar report in which the aircraft only contains a PSR code
Radar report	report generated by a radar in one radar swe