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Thursday, September 16, 2010

Akash Surface-to-Air Missile System, India



The Akash (sky) is an all-weather medium-range surface-to-air missile (SAM) system developed in India. It provides multidirectional and multitarget area defence. The missile system was indigenously developed as part of the integrated guided-missile development programme (IGMDP). In operation from 1983 to 2007, the programme developed a range of missiles, including the Nag, Agni and Trishul missiles and the Prithvi ballistic missile.

In 2008, the Indian Air Force (IAF) introduced its indigenous SAM system after nine successful field trials. Some modifications to the Akash SAM, such as the launch platform, were made to the army version to meet mobility and gradeability requirements.

In June 2010, the Defence Acquisition Council (DAC) of India ordered Rs125bn ($2.8bn) of the army version Akash missile system for induction into the Indian Army.


Akash surface-to-air-missile

The Akash SAM was developed to replace the Russian 2K12 Kub (SA-6 Gainful) missile system, currently in service. Development of the Akash missile system began in the 1980s, involving the work of 300 public and private companies. The flight tests were initiated in 1990 and the development flights continued till 1997. Several user trials of the missile system were conducted and its ballistic missile role was proven successful.

The Akash SAM system – including the associated radars, missile and systems – took about 20 years to develop, at an investment of about $120m. Other countries that have developed the multitarget handling surface-to-air missile systems are the US, some EU countries, Russia, Israel and Japan.

SAM system features

The Akash SAM system consists of an integral ramjet propulsion, a switchable guidance antenna system, a command guidance unit, an onboard power supply, a system arming and detonation mechanism, digital autopilot, radars and C4I centres.

The Akash SAM system – including the associated radars, missile and systems – took about 20 years to develop, at an investment of about $120m. Other countries that have developed the multitarget handling surface-to-air missile systems are the US, some EU countries, Russia, Israel and Japan.


Akash missile launch

The Akash missile can be launched from static or mobile platforms, such as battle tanks, providing flexible deployment. The SAM can handle multitarget and destroy manoeuvring targets such as unmanned aerial vehicles (UAV), fighter aircraft, cruise missiles and missiles launched from helicopters.

The Akash SAM system defends vulnerable areas in all weather conditions against medium-range air targets being attacked from low, medium and high altitudes.

It can operate autonomously, and engage and neutralise different aerial targets simultaneously. The kill probability of the Akash is 88% for the first and 99% for the second missile on a target. The Akash SAM is claimed to be more economical and accurate than the MIM-104 Patriot, operated by several nations including the US, due to its solid-fuel technology. The Akash can intercept from a range of 30km and provide air defence missile coverage of 2,000km².


SAM system features

The Akash SAM system consists of an integral ramjet propulsion, a switchable guidance antenna system, a command guidance unit, an onboard power supply, a system arming and detonation mechanism, digital autopilot, radars and C4I centres.


Detonation sequence

The prefragmented warhead of the Akash missile is coupled with a digital proximity fuse. The detonation sequence is controlled by safety arming and a detonation mechanism. The missile is also integrated with a self-destructive device. Unlike the Patriot missile, Akash uses a ramjet propulsion system which gives it thrust to intercept the target at supersonic speed without any speed deceleration.

The terminal guidance system of the missile enables its working through electronic countermeasures.

The Rajendra radar completely guides the Akash missile, which increases its efficacy against electronic jamming of aircraft.

( www.army-tecnology )

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