08-12-2012, 05:02 PM
LASER GUIDED MISSILE
LASER GUIDED MISSILE.pptx (Size: 288.65 KB / Downloads: 194)
INTRODUCTION:
Laser guidance is a technique of guiding a missile or other projectile or vehicle to a target by means of a laser beam.
Most of the laser guided systems operate semi-active radar homing (SARH). This technique is sometimes called SALH, for Semi-Active Laser Homing.
This is likely to be widely used by advanced military vehicles in order to make it harder to use laser rangefinders against them and harder to hit them with laser- guided missiles.
BACKGROUND:
Missiles differ from rockets by virtue of a guidance system that steers them towards a pre-selected target.
Unguided rockets proved to be useful yet frequently inaccurate weapons when fired from aircraft during the World War II.
Several warring nations, including the United States, Germany and Great Britain mated existing rocket technology with new radio- or radar-based guidance systems to create the world's first guided missiles.
The problems centered on the unreliability of the new radio-wave technologies.
Dr. Theodore Maiman built the first laser (Light Amplification by Stimulated Emission of Radiation) at Hughes Research Laboratories in 1960.
The military realized the potential applications for lasers almost as soon as their first beams cut through the air.
The accuracy of these weapons earned them the well-known sobriquet of "smart weapons."
the laser guided missile has established itself as a key component in today's high-tech military technology.
SEMI ACTIVE RADAR HOMING:
Semi-active radar homing or SARH, is a common type of missile guidance system for longer range air to air and surface to air missile systems.
In the SARH system the missile listens for the reflected signal at the nose, and is still responsible for providing some sort of “lead” guidance.
SARH is largely independent of range and grows more accurate as it approaches the target.
GUIDANCE & CONTROL SECTION
Includes the electronic sensing systems that initiate the guidance orders and the control system that carries them out.
There are a number of basic guidance systems but Homing-type, air-launched, guided missiles are currently used.
Homing systems are classified as active, semi active, and passive.
ADVANTAGES OF LASER GUIDED MISSILE
The SAL seeker is relatively low cost, offering high precision operational flexibility, despite its adverse weather limitations.
Only the more sophisticated missiles offer the flexibility and field of regard ('side looking') capability adequate for effective lock-on after launch targeting.
The LAHAT laser guided missile is lightweight weapon can be employed by light helicopters.
CONCLUSION
In World War II it could take 9,000 bombs to hit a target the size of an aircraft shelter. Today we can do it with one laser-guided missile.
Laser guided missile can be fired at targets ranging 8 to 13 kilometers and some like LAHAT laser guided missile up to 22 kilometers. Though many missiles are developed, they don’t find accuracy as in the reaching the target.