The computer used to control the Patriot missile is based on a 1970s design and uses 24-bit arithmetic. The Patriot system tracks its target by measuring the time it takes for radar pulses to bounce back from them. Time is recorded by the system clock in tenths of a second, but is stored as an integer. To enable tracking calculations the time is converted to a 24-bit floating point number. Rounding errors in the time conversions cause shifts in the system's ``range gate", which is used to track the target.

1. The Dhahram Patriot
Missile Failure
Group members:-
TG/2017/274 S.M.D.C.R.APPUHAMI
TG/2017/247 M.N.F Zainab
TG/2017/250 M.M Pasmina
Course name:-Software Engineering(ICT2233)

2. Content..
Introduction to system
Who owns
When it was developed, cost
What is the purpose?
Explain disaster or failure
Cost of failure

3.  Patriot missile air defense system.
Long-range, all-altitude, all-weather air defense system
To counter tactical ballistic missiles, cruise missiles and advanced
aircraft.
 Scud missiles Series of tactical ballistic missiles
developed by the Soviet Union during the Cold War.
Introduction

4. Who owns?
Patriot started in 1964 with the Army Air Defense System for the
1970s (AADS-70s) which became Surface-to-Air Missile,
Development (SAM-D).
Development started in Huntsville Alabama.
The MIM-104 Patriot is a surface-to-air missile (SAM) system
used by the United States Army and several allied nations .

5. When it was developed, cost
Designed in 1969
Produced in 1976
In service since 1981
Designed by – Raytheon
Unit cost – About US $2-3 million

6. Purpose
• Designed to detect target and hit
incoming missiles.
• Destroy incoming aircraft and cruise
missiles.
• Protect soldiers and civilians from
missile attacks.

7. Disaster/Failure
 February 25, 1991, during the Gulf War, an American
Patriot Missile battery in Dharan, Saudi Arabia, failed to
track and intercept an incoming Iraqi Scud missile.
Patriot system failed to track the
Skud missile and never launched.

8. Cost of failure
28 soldiers dead.
90 injured.
A failure to track after launch cost
around $600k.