In a major step to fortify India's airspace monitoring and early warning grid, the Ministry of Defence (MoD) has recently released a Request for Information (RFI) inviting domestic companies to build and supply Long Range Surveillance Radars (LRSR).
This initiative is a core part of the “Aatmanirbhar Bharat” (Self-Reliant India) mission, designed to cut down reliance on imported military hardware.
The new radars are intended to replace legacy systems—some of which have been operational since the 1970s—while significantly boosting the situational awareness of the Indian Armed Forces across various battlefronts.
These state-of-the-art systems will be fully mobile and vehicle-mounted, allowing for rapid deployment wherever threats emerge.
The backbone of this new radar project is the advanced 4-Dimensional Active Electronically Scanned Array (AESA) architecture powered by homegrown Gallium Nitride (GaN) semiconductor technology.
Using GaN-based modules represents a massive upgrade over traditional silicon, offering exceptional power efficiency, lower heat generation, and superior jamming resistance against electronic warfare.
India proudly became the seventh country to develop this highly restricted GaN technology in 2023 through the Defence Research and Development Organisation (DRDO).
With a mandated detection range of over 450 kilometres and a vertical altitude reach of up to 40 kilometres, these radars will stand as some of the most formidable surveillance tools in their category, capable of tracking high-speed ballistic and cruise missiles alongside modern stealth aircraft.
A standout capability of the new LRSR system is the inclusion of a co-located X-Band radar dedicated entirely to spotting drones.
Modern warfare has seen a massive surge in the use of unmanned aerial systems (UAS), particularly low-flying and hard-to-detect threats.
By adding a specialised X-Band sensor to the main antenna vehicle, the military can achieve highly detailed tracking and automatic classification of smaller targets, such as quadcopters, loitering munitions, and drone swarms.
This multi-layered detection approach highlights India’s urgent focus on countering drone threats, an absolute necessity given the tactical lessons learned from recent border engagements and the changing nature of cross-border conflicts.
Versatility in extreme environments is another crucial demand for these new platforms.
The MoD requires the LRSR to operate seamlessly at staggering elevations up to 5,000 metres. This ensures uninterrupted airspace coverage over treacherous mountainous regions like the Himalayas, where bad weather and geographical barriers often block traditional radar signals.
Furthermore, the heavily ruggedised systems must withstand severe temperature fluctuations, functioning perfectly from freezing -40°C cold deserts to blistering +50°C plains, guaranteeing round-the-clock reliability regardless of where they are stationed.
This procurement underlines a strategic push to weave advanced sensor fusion into the broader Indian air defence network.
The 450-km LRSR units will work hand-in-hand with recently ordered homegrown platforms like the Surya anti-stealth radar, the 400-km Arudhra AESA system, and existing Rohini radars.
By filling the operational gaps in deep-look surveillance and micro-drone tracking, the military will achieve a highly comprehensive and unified air situation picture.
Furthermore, restricting the bidding to Indian entities encourages private sector firms to collaborate with state-owned powerhouses, promising faster innovation and quicker delivery times for the armed forces.
The push for these sophisticated radars arrives at a critical juncture, as the security environment in the region is increasingly dominated by asymmetric warfare, stealth technology, and electronic warfare systems.
Upgrading to these cutting-edge LRSR systems will fundamentally transform India’s early warning capabilities.
Ultimately, it will reinforce the nation's multi-tiered air defence shield, ensuring the military is fully prepared to intercept and neutralise both traditional fighter jets and the new wave of unmanned aerial threats.
