India’s indigenous long-range air defence program, Project Kusha, has secured an important strategic milestone.
The Indian Army has officially registered its intent to join the initiative alongside the Indian Air Force (IAF).
This development signals a unified, tri-service approach toward creating a sovereign alternative to imported strategic air defence frameworks.
The consensus arrives at a critical juncture as preparations gain momentum for the maiden prototype flight trials of the Kusha-M1 and Kusha-M2 interceptor missiles.
These vital validation flights are scheduled to take place during the latter half of this year.
Operationally, the Kusha-M1 interceptor is built to neutralize threats at distances of roughly 150 kilometres.
Meanwhile, the larger Kusha-M2 variant will extend India's interception range to approximately 250 kilometres.
Building India’s Sovereign Air Shield
Project Kusha is being spearheaded by the Defence Research and Development Organisation (DRDO) as India's next-generation Long-Range Surface-to-Air Missile (LRSAM) platform.The primary goal of this system is to deploy a layered defensive shield against a wide spectrum of aerial risks, including fighter jets, cruise missiles, unmanned aerial vehicles (UAVs), stand-off weaponry, and specific ballistic missile threats.
Over time, the deployment of Project Kusha is expected to significantly reduce India’s reliance on foreign military acquisitions, such as the Russian-made S-400 Triumf system.
The active inclusion of the Indian Army marks a pivotal shift in the program's scope.
It shows that Project Kusha is shifting from an exclusive, Air Force-centric asset into an expansive, unified national air defence network.
In recent years, the Indian Army has sharply increased its focus on long-range aerial protection.
This shift is driven by the rapid spread of precision-guided munitions, drones, cruise missiles, and low-observable threats across modern combat zones.
Seamless Network Integration
A major advantage of Project Kusha over imported systems like the S-400 is its built-in compatibility with India's Integrated Air Command and Control System (IACCS).Created by the IAF, the IACCS serves as a automated national network that connects ground-based radars, airborne warning systems, missile batteries, and command hubs into a single operating grid.
While foreign systems usually require custom modifications and software patches to communicate with domestic systems, Project Kusha is being engineered from its inception to blend into the IACCS framework.
This design enables advanced sensor-fusion capabilities, allowing track and target parameters gathered by diverse sensors to be distributed instantly across the network.
Multi-Static Sensor Fusion vs Stealth Threats
In real-world operations, a Kusha interceptor will not have to rely solely on its own fire-control radar for targeting data.Instead, it can execute an interception using tracking data provided by airborne early warning (AEW&C/AWACS) aircraft, distant ground-based radars, or other distributed network sensors located hundreds of kilometres away.
For instance, if an adversarial aircraft is spotted by an airborne radar or a Bharat Electronics Limited (BEL) Arudhra ground radar, that tracking information can be fused into the central network to guide a Kusha missile directly to the target.
This sophisticated data-fusion capability is vital for detecting and neutralising modern stealth aircraft and low-observable platforms.
Stealth fighters typically exploit gaps between isolated radar stations by minimizing their radar signatures from specific angles.
However, a networked, multi-static tracking environment complicates stealth tactics.
By combining diverse sensors spread across wide geographic areas, the network can cross-reference and correlate weak radar returns that a single isolated radar would miss.
This interconnected setup offers Project Kusha a clear operational edge within India's domestic military infrastructure.
By synchronizing data from airborne radars, ground assets, passive tracking devices, and decentralized command stations, the system establishes a resilient and flexible engagement network capable of countering highly complex aerial challenges.
Furthermore, Project Kusha is structured around multiple interceptor tiers to manage a multi-layered defensive perimeter—mirroring the advanced doctrines utilized by global military powers.
While the M1 and M2 interceptors are designed to handle mid-to-long-range threats, future versions will expand the network's overall engagement envelope.
Additional Open-Source Information
- The Three-Tier Architecture: In addition to the M1 (150 km) and M2 (250 km) variants, Project Kusha includes a third long-range variant known as the M3 interceptor. The M3 is designed to engage strategic targets, such as adversarial AWACS, mid-air refuellers, and long-range bombers, at extended ranges of 350 to 400 kilometres.
- Core Technology & Propulsion: The system utilizes dual-pulse solid rocket motors to maintain high terminal energy and maneuverability during the final phase of interception. According to open-source updates, DRDO has successfully completed ground validation of these rocket motors. The interceptors are also expected to feature advanced active electronically scanned array (AESA) radio frequency (RF) and infrared (IR) seekers for precise terminal guidance.
- Industrial Footprint: The Cabinet Committee on Security (CCS) originally cleared the project in 2022, followed by an Acceptance of Necessity (AoN) in 2023 for five squadrons for the IAF at an estimated cost of ₹21,700 crore. Bharat Electronics Limited (BEL) and Bharat Dynamics Limited (BDL) serve as the lead production agencies. BEL has recently allocated resources and land, including a 75-hectare site within the Uttar Pradesh Defence Industrial Corridor, to establish dedicated manufacturing lines aimed at mass-producing components for Project Kusha.
