Pakistan's missile research and development programme began with the planning stage in early 1987. According to General Mirza Aslam Beg of the Pakistan Army, once intelligence information that India was already developing nuclear missiles had been authenticated, then President Zia ul Haq was informed. He then made two decisions: firstly, Pakistan would not develop chemical weapons due to moral principles. Secondly, Pakistan would build short and medium range missiles with appropriate guidance systems. The programme has since spawned several strategic missile systems capable of being armed with conventional or nuclear warheads. Designated the Hatf series, the ballistic and cruise missiles have been created by several Pakistani organisations often cooperating or competing with each other.
Battle-field range ballistic missiles
The programme's first project was the Hatf I, a ballistic missile with an inertial guidance system, a range of 80 km and a payload of 500 kg. An improved version designated Hatf II, with the same payload but extended range of 250 km, was produced in 1989. The latest battle-field range system to be produced is the Hatf IX Nasr, which is widely believed to be a delivery system for tactical nuclear weapons.
Short and medium range ballistic missiles
The first of Pakistan's larger missile systems, the Hatf III Ghaznavi with a range of 600 km and payload of 500 kg, was first tested in July 1997 and is stated to have been a major break-through. It had a two-stage solid fuel rocket motor and a more advanced terminal guidance system with an on-board computer. Five different types of warhead have been designed for the missile and they can be delivered with a claimed Circular Error Probability (CEP) of 0.1% at 600 km. The Ghaznavi is believed to have been based on the Chinese M-11 missile  but it has been claimed that the Ghaznavi's guidance system was developed entirely in Pakistan.
The Ghauri series are liquid-fuelled ballistic missiles whose development was headed by the Kahuta Research Laboratories (KRL). The development is believed to have been led by Abdul Qadeer Khan. Development of the first two variants, Ghauri I and Ghauri II was completed in the 1990s. According to the memoirs of AQ Khan, the development of the Ghauri III variant was stopped by Pervez Musharraf in 2000 with the project being around 50% complete.
The Shaheen series are solid-fuelled ballistic missiles developed by the National Development Complex (NDC), which was founded by the Pakistan Atomic Energy Commission. The SUPARCO and DESTO organisations were also involved. The electronics were developed by other NESCOM subsidiaries such as Margalla Electronics. The Shaheen programme was highly ambitious considering Pakistan's lack of infrastructure. Two Shaheen variants are known to have been completed and made operational, the Shaheen-I and Shaheen-II. The Shaheen-III is believed to be under development.
In 2005 the Hatf VII Babur ground-launched cruise missile was revealed in a public test-firing. Early versions had a range of 500 km but later a 700 km variant was tested. In September 2012 a new launch vehicle was tested, as well as a new command and control system named the Strategic Command and Control Support System. It was stated that the SCCSS would give "decision-makers at the National Command Centre robust command and control capability of all strategic assets with round the clock situational awareness in a digitised network-centric environment." It was also stated that the Babur's guidance system uses terrain contour matching (TERCOM) and digital scene matching and area co-relation (DSMAC) techniques to achieve accuracy described as "pin-point". The new launch vehicle, a MAZ transporter erector launcher, is armed with three missile rounds launched vertically.
In 2007 the Hatf VIII Ra'ad, an air-launched cruise missile (ALCM) was revealed in a test by the Pakistan Air Force. It has a stated range of 350 km. It has been speculated that engineers from Denel of South Africa may have "assisted" during the design process of the Ra'ad ALCM. A flight test on 31 May 2012 was stated to have validated integration with the new Strategic Command and Control Support System (SCCSS), stated to be capable of remotely monitoring the missile's flight path in real time.
- Lodi, Lieutenant General Safdar F.S. (May 1998). "Pakistan's Missile Technology". Head of Integrated Missile Research and Development Programme (IMRDP). Defence Journal of Pakistan. http://www.defencejournal.com/may98/pakmissiletech.htm.
- Kapila, Dr. Subhash. "Pakistan’s Ballistic Missile Arsenal: Development and Acquisition Philosophy". South Asia Analysis Group. http://www.southasiaanalysis.org//papers2/paper148.html.
- "Hatf 3 (Ghaznavi) (Pakistan), Offensive weapons". http://articles.janes.com/articles/Janes-Strategic-Weapon-Systems/Hatf-3-Ghaznavi-Pakistan.html. Retrieved 16 June 2011.
- "surface to surface missile, Hatf-V (Ghauri)". 6 April 1998.. http://www.fas.org/news/pakistan/1998/04/16980406.htm.
- "Pak test fires Hatf VII nuclear missile". 5 June 2012. http://www.thehindu.com/news/international/article3492864.ece.
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