Southern Shield

Southern Shield is a hypersonic counter-threat system concept being developed by Lockheed Martin Australia. The program addresses one of the most challenging problems in modern air defense: defending against hypersonic weapons that combine extreme speed (Mach 5+), maneuverability, and (in some cases) low-altitude flight profiles that make them extremely difficult to detect, track, and intercept.

Key aspects of Southern Shield:

1. Hypersonic threat addressed:

• Hypersonic cruise missiles: Air-breathing scramjet-powered missiles that maintain powered flight at Mach 5+ (e.g., Russian Kh-47M2 Kinzhal, Chinese DF-100)
• Hypersonic glide vehicles (HGVs): Boost-glide vehicles that are launched by a rocket booster and then glide to the target at hypersonic speeds with maneuverability (e.g., Russian Avangard, Chinese DF-17)
• These weapons are extremely difficult to intercept because:
  • Their speed leaves very little reaction time
  • Their maneuverability defeats traditional ballistic missile defense tracking predictions
  • Their low altitude (for cruise missiles) limits radar detection range
  • Their thermal signatures are different from traditional ballistic missiles

2. Lockheed Martin Australia development:

• Southern Shield is being developed by a team of 60+ people at Lockheed Martin Australia
• The team includes Australian engineers, scientists, and defense specialists
• The development leverages Lockheed Martin's extensive US hypersonic and missile defense experience
• The Australian development ensures the system is tailored to Australian requirements and geography

3. Likely system components:

• Advanced sensors: Detection and tracking of hypersonic threats requires advanced sensors including:
  • Space-based infrared sensors (for boost-phase detection)
  • Over-the-horizon radar (JORN could contribute)
  • Airborne sensors (Wedgetail AEW&C)
  • Ground-based radar (CEA Technologies CEAFAR)
• Command and control: Rapid decision-making and interceptor coordination
• Interceptors: Hypersonic or high-speed interceptors capable of engaging maneuvering hypersonic targets
• Battle management: Integration with the broader Australian and allied air defense architecture

4. Connection to Australian air defense architecture:

• Southern Shield would complement other Australian air defense capabilities:
  • Hobart-class Aegis destroyers (sea-based air defense)
  • NASAMS 2 (ground-based medium-range air defense)
  • Aegis SM-2 hybrid ground-based system (tested at Woomera)
  • JORN (wide-area surveillance)
  • Wedgetail AEW&C (airborne surveillance)
• The layered defense concept ensures that hypersonic threats can be engaged at various points in their trajectory

5. AUKUS connection:

• Southern Shield connects to AUKUS Pillar 2 hypersonic cooperation
• The US is developing its own hypersonic defense capabilities (e.g., Glide Phase Interceptor)
• Technology sharing through AUKUS could benefit Southern Shield development
• The Australian geographic position provides unique opportunities for hypersonic defense testing and deployment

6. Strategic significance:

• The development of hypersonic weapons by Russia, China, and other nations has created an urgent need for hypersonic defense capabilities
• Australia's geographic position and alliance relationships make hypersonic defense a critical capability
• Southern Shield represents Australian sovereign investment in this critical capability area
• The program builds on Lockheed Martin's extensive missile defense experience (PAC-3, THAAD, Aegis BMD)

Southern Shield represents Australia's recognition of the hypersonic threat and its investment in sovereign defensive capability. The program's development by Lockheed Martin Australia leverages both US hypersonic defense expertise and Australian requirements, creating a tailored solution for the Australian strategic environment. The connection to AUKUS Pillar 2 enables technology sharing that could accelerate Southern Shield development and enhance allied hypersonic defense cooperation.