Group : Radar Systems
Status : Under Development
Origin : India
Contractor : Bharat Electronics Limited
Total Production : ?

The Revathi is a navalized version of the Indian Air Force (IAF) Rohini 3D multi-role medium range mobile radar. As of August 2008, the new version was still being developed by the DRDO Electronics and the Radar Development Establishment (LRDE), Bangalore. The Indian Navy would integrate the Revathi surveillance radar aboard surface ships.

Group : Surveillance Vehicles
Status : Active
Origin : India
Contractors : Bharat Electronics Limited*, Astra Microwave, Bharat Earth Movers Limited, Larsen and Toubro Ltd.
Initial Operational Capability (IOC) : August 2008
Total Production : 100

The Rohini is a 3D multi-function medium range air surveillance radar mounted on a modified heavy truck called "Tetra" and supported by a mobile auxiliary power unit. The Tetra is provided by Bharat Earth Movers Limited (BEML). The Rohini radar system has been developed by India's Defence Research and Development Organisation's (DRDO) Electronics and Radar Development Establishment (LRDE), Bangalore and engineered and produced by Bharat Electronics Limited (BEL). Larsen & Toubro (L&T) and Astra Microwave also provided their expertise during the Rohini development. The Indian Air Force (IAF) has a requirement for 100 such radars with the first delivered in August 2008.

The Rohini radar system has been designed to detect and track multiple targets flying simultaneously and determine their altitude. Its horizontal detection range is in excess of 170 km and at least 15 km in altitude. The Rohini radar system can detect low altitude targets as well as supersonic aircraft flying at up to Mach 3. The radar is provided with Electronic Counter Counter Measure (ECCM) capabilities including frequency agility and jammer analysis. A secondary surveillance radar, IFF, is integrated with the primary radar to distinguish friendly and hostile aircraft.