Iranian Missile Inventory
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Shahab-1: The Shahab-1 was Iran’s first foray into the ballistic production theater. After purchasing around twenty Russian-built Scud-B short range ballistic missiles (SRBMs) from Libya in 1985 and at least twelve from Syria in 1986, Iran sought to contend with Iraqi airpower during the 1980 to 1988 Iran-Iraq War by developing its own Scud-B, the Shahab-1. Between 1987 and 1992, the Democratic People’s Republic of Korea (DPRK) aided Iranian efforts at indigenous Shahab-1 production with technical assistance and material resupply, selling Iran between 200 and 300 Hwasong-5’s—North Korean variants of Russian Scud-B’s with enhancements to the missile’s airframe, INS, and engine. While Tehran, in the interim, strived to make its own Scud-B variant plant operational by 1988. The missile has a range between 285 and 330 kilometers using INS and has an estimated circular error probable (CEP) of 450 meters. It is a single stage, liquid propellant missile that uses a transporter-erector-launcher (TEL) in its launch stage.
While Iran launched the Scud-B’s it received from Libya, Syria, and North Korea during the Iran-Iraq War, the domestically-made Shahab-1 was not tested until 1988, and Iran was likely producing Shahab-1’s with DPRK oversight until 1994. From 1994 to 2001, Iran launched between forty-one and ninety-one Shahab-1’s at various Mujahedin–e Khalq (MEK) camps in Iraq.
Shahab-2: The Shahab-2—a Scud-C variant derived from the DPRK’s Hwasong-6—quickly became the Iranian program of choice when technological challenges in Scud-B development prevented mass production of the missile, likely due to limited material availability. This next iteration of the Shahab family used resources accessible to Iran to improve INS and add an extra 500 kg of propellant to attain a longer range of over 500 km with a smaller warhead than the Scud-B model, giving a CEP of 1,000 m.
The Shahab-2 began testing in July 1998 and was adopted into full operational use by 2004.
Shahab-3: The Shahab-3 was considered Iran’s first medium range ballistic missile (MRBM), almost identical in appearance and abilities to the DPRK’s Nodong nuclear-capable MRBM. Development of a domestic version of the Nodong, the Shahab-3, began when Iranian Brigadier General Manouchehr Manteghi traveled to North Korea in 1993 with twenty-one Iranian missile specialists. Since its operational introduction a decade later, constant developments have complicated gauging complete and accurate assessments of the missile’s capabilities. Depending on the payload weight, the road-mobile missile can travel between 800 and 1300 km carrying 800 to 1200 kg payloads. It uses single-stage liquid propellant and has a separating re-entry vehicle (RV), allowing the detachable warhead to reenter the atmosphere with enhanced accuracy and speed, while making it less targetable in terminal phase. However, the Shahab-3 uses the same basic INS guidance of its predecessors, so its accuracy is still weak with a CEP around 2,500 m.
Shahab-3M: Over the last decade and a half, a Shahab-3M has received several modifications to reduce weight in non-pivotal areas of the Shahab-3, including shrunken planar fins, lighter aluminum material in the fuselage, and smaller warheads, which allow the elongated airframe to carry additional fuel and increase the missile’s range. While drastically improved GPS navigation is incompatible with the Shahab-3’s less advanced nature, Iran has somewhat improved the INS, and reconfigured the RV to a triconic ‘baby-bottle’ shape that allows faster terminal phase velocity, higher likelihood of evading BMD systems, and air-burst detonation for delivering chemical, submunition, and nuclear warheads (albeit the success of these are dependent on the warhead’s air-dispersal capability).