Surya radars to provide anti-stealth shield; can easily detect stealth fighters

Having a detection range of up to 360 kilometres for a 2 m² radar cross-section target, the Surya radar can effectively monitor large airspaces and track multiple targets simultaneously.

With 10 antenna rotations per minute, it provides continuous 360-degree coverage, and can operate in a “staring mode” for precise tracking of slow-moving or stealth-enhanced aerial targets.

The first unit of this anti stealth radar was handed over to IAF in mid-March 2025 by Alpha Design Technologies Limited (ADTas. Five more systems are to be delivered at regular intervals and get integrated with the IAF’s Air Defence Ground Environment System (ADGES).

The Surya VHF Radar represents a significant step in India’s push toward a multi-layered air defence architecture. Developed indigenously the radar is purpose-built for countering evolving stealth threats, particularly from fifth-generation aircraft like China’s J-20 and J-35 and American F35.

The Very High Frequency (VHF) band gives the Surya Radar the advantage of longer wavelengths that can penetrate radar-absorbing coatings typically used on stealth aircraft.

The VHF band enables detection of these targets by inducing resonances on larger aircraft surfaces, thus offering a major sensor advantage against low-observable platforms.

The Surya VHF Radar is mounted on two 6×6 high-mobility vehicles, ensuring it can be relocated rapidly across diverse terrains. The radar’s modular architecture enhances reliability and ease of maintenance, supporting long operational durations under adverse conditions.

Integrated into the national air defence network grid, these radars provides the IAF with a vital first-line sensor capable of neutralising one of the most challenging aspects of next-generation aerial warfare—low observability.