What Is The System Definition Document (Part-1)

Introduction First System Definition Document
 

• Purpose

System Definition Document

The purpose of this system definition document is to capture the essential elements of the Wide Area Augmentation System Navigation Infrastructure Environment Simulator (WAAS-NIES), their relationships, characteristics, and behavior.  It communicates the architectural decisions concerning the major hardware and software components of the WAAS-NIES.  This document will drive the requirements definition, and will influence and constrain all subsequent activities including the hardware and software design, implementation, integration, and testing. 
 

• Scope

This system definition document defines the architecture of the WAAS-NIES and the WAAS-NIES support environment.  It defines major software and hardware elements that are essential to satisfying the concept of operations for the system.
 

Definitions and Acronyms

• Definitions

Environment Simulator – The simulated ‘world’ in which the WAAS-NIES exists, and from which the WAAS-NIES receives commands

• Acronyms and Abbreviations

CPU        Central processing Unit
CONOPS     Concept of Operations
COTS         Commercial-off-the-Shelf
GB        gigabyte
Hz        hertz
PC        Personal computer
SDD        System Definition Document
TBD        To be determined
TBS        To be supplied
WAAS-NIES        Wide Area Augmentation System Navigation Infrastructure Environment Simulator

• References

The documents in the following table are considered a part of this document to the extent referenced within this document.

• Overview

This first delivery of the System Definition Document (SDD) is provided prior to the release of the System Requirements Document (SRD).  The SDD will be refined through the development of the WAAS-NIES Project. 
 

Section 2 provides an overview of the WAAS-NIES system.  Section 3 provides the software architecture overview.  Section 4 presents the major use cases for the system.  Section 5 presents the process view of the system.  Section 6 presents the deployment view of the system.  External interfaces to the WAAS-NIES are presented in section 7, and constraints on the development of the design are presented in section 8.