What Is THAAD? What Does It Do? Lockheed Martin’s 200 km Altitude Ballistic Missile Defense System

The U.S. upper-atmosphere ballistic missile defense backbone, Lockheed Martin THAAD (Terminal High Altitude Area Defense), destroys short and medium-range ballistic missiles up to 200 km altitude using kinetic impact. Operated by Saudi Arabia, UAE, South Korea, and Israel. Türkiye’s SİPER and the upcoming SİPER-2 hypersonic program are the domestic answer in the same segment.

Type

Upper-atmosphere BMD

Altitude

40—200 km

Range

200 km

Interceptor

Hit-to-kill (KKV)

Maker

Lockheed Martin

Service

2008—

What Is It?

THAAD is a ballistic missile defense (BMD) system developed by Lockheed Martin for the post-Cold War U.S. Army. Operating above Patriot and below GMD — i.e., the 40—200 km upper-atmosphere/lower-space band. The interceptor carries no conventional explosive warhead; it destroys targets through “hit-to-kill” kinetic impact. The AN/TPY-2 X-band AESA radar detects ballistic missiles at up to 1,000 km.

What Does It Do?

THAAD intercepts short-range (SRBM, <1,000 km), medium-range (MRBM, 1,000—3,000 km), and limited IRBM-class ballistic missiles during the terminal phase (atmospheric reentry). Patriot PAC-3 covers low-altitude (15—40 km), THAAD mid-upper altitude (40—200 km), and GMD space (300+ km) — this three-layer architecture forms the U.S. BMD doctrine.

Technical Specifications

Specification	Value
Class	Upper-atmosphere ballistic missile defense system
Interceptor length	6.17 m
Interceptor diameter	340 mm
Interceptor weight	900 kg
Motor	Pratt & Whitney solid fuel
Range	200 km
Altitude	40—200 km
Speed	Mach 8+
Guidance	Inertial + GPS + IIR seeker
Warhead	Hit-to-kill kinetic impact (no HE warhead)
Radar	AN/TPY-2 X-band AESA, 1,000 km range

Lockheed Martin THAAD interceptor launch. Source: Wikimedia Commons.

Who Bought It, At What Price?

THAAD battery cost is 800 million — 1 billion USD. Each battery includes 6 launchers, 48 interceptors, 1 radar, and a command center. Interceptor unit cost is approximately 12—15 million USD. Saudi Arabia ordered 7 batteries (15B USD) in 2017, UAE 2 batteries (1.1B USD), South Korea 1 battery (political friction).

Operator	Batteries	Interceptors	Year
U.S. Army	7	480+	2008
UAE	2	96	2015
Saudi Arabia	7 (planned)	360+	2017—2026
South Korea	1	48	2017
Romania (additional site)	1 base	–	2020 Aegis Ashore + THAAD
Israel (operational support)	1 (temporary)	–	2024 Iran crisis
Türkiye (request)	–	–	Rejected, post-S-400

Comparison With Turkish Counterpart

Türkiye’s THAAD equivalent is a multi-layered development: SİPER Block 2 (long-range air defense, ~150 km), SİPER-2 hypersonic development (next generation), and the HİSAR-U / SİPER-1 combination (100+ km). After S-400 sanctions and THAAD export rejection, Türkiye built a fully domestic BMD capability. ASELSAN GÖKDEMİR (space-based) and GÖKKUBBE (X-band early warning) radars are in parallel development.

Criterion	THAAD (LM)	SİPER Block 2 (ROKETSAN)	SİPER-2 (in development)
Class	Upper-atmosphere BMD	Long-range SAM	Hypersonic interceptor
Altitude	40—200 km	30 km	60+ km (goal)
Range	200 km	150 km	200+ km (goal)
Speed	Mach 8+	Mach 5	Mach 6+ (goal)
Interceptor	Hit-to-kill	HE + proximity	Hit-to-kill (planned)
Radar	AN/TPY-2 X-band	EHSİM L/S band	GÖKKUBBE X-band (planned)
Cost	Very high	Domestic	Domestic

Frequently Asked Questions

Why couldn’t Türkiye buy THAAD?

Türkiye made an official request in 2017—2019; the U.S. first cited cost, then S-400 sanctions to reject the sale. Türkiye turned to domestic BMD via SİPER instead.

Does SİPER replace THAAD?

Not fully — SİPER Block 2 focuses on air defense (aircraft, helicopters, cruise missiles). For pure BMD, SİPER-2 hypersonic development is ongoing; maturity expected in the 2030s.

Why did Saudi Arabia pay so much for THAAD?

Deterrence against regional ballistic missile threats (Iran, Houthis) and as part of the broader U.S.-Saudi strategic partnership package.

Does THAAD carry a nuclear warhead?

No. Hit-to-kill (kinetic impact) — uses pure collision energy. No explosive or nuclear warhead. This eases political approval as a defensive weapon.

Is it effective against hypersonic threats?

Classic THAAD has limited capability. THAAD-ER (Extended Range) and THAAD-D variants are being developed for hypersonic and other emerging threats. SİPER-2 pursues the same goal in parallel.

Conclusion

THAAD is the mid-upper-layer product of modern BMD doctrine. After external access to S-400 and THAAD closed, Türkiye built domestic capacity through the SİPER ecosystem. The maturation of the SİPER-2 hypersonic variant in the 2030s will position Türkiye as a BMD exporter in the Europe-Asia market.