Products/Technologies for civil Sector

LRDE DRDOa. Indian Doppler Radar - I (INDRA-I)
Indra-I is a Tactical Surveillance Radar for Army for point and area defence or as gap filler for the air defence, especially against aircraft threat at very low altitudes.

Users : Indian Army and Indian Air Force
Status : The system have been inducted into Service. Operational with Air Force.



LRDE DRDOb. Indian Doppler Radar - Pulse Compression (INDRA-PC)
Indra Pulse Compression radar was developed to meet Air Defence requirements of the Air Force. It is a low flying target detection 2D radar. The radar mounted on three wheeled vehicles, is transportable by Rail, Road and Air.

Users : Indian Air Force
Status : Operational with Air Force


LRDE DRDOc. Battle Field Surveillance Radar - Short Range (BFSR-SR)
The Battle Field Surveillance Radar - Short Range (BFSR-SR) is a man portable, battery operated Surveillance Radar developed for the Indian Army. The radar has been developed for deployment in the forward localities with the capabilities to detect, track and classify variety of moving ground surface targets. BFSR-SR - a reliable sensor for day and night operations in all weather conditions - has made surveillance of forward areas effective in 24 X 7 environment and has firmly established self-reliance in that class of radar. The radar can be carried in three man-packs.

The radar is a simple, easy to use and user-friendly surveillance e-sensor, in that an Infantry soldier can install and effectively put the radar into operation within five minutes. It has been built to be a reliable surveillance and tracking radar to search a specific sector to detect and perform track while scan for multiple targets like crawling man, single / group of walking men, light / heavy vehicles. Audio and visual aids help identify and classify a target. The radar is also a potential ground based e-sensor for Border Security Force, Coast Guard and Police for surveillance of designated areas. The radar would be a very cost-effective perimeter surveillance sensor for airports, large industrial and other infrastructure.

Users : Indian Army and BSF
Status : The system has been inducted into Service.

LRDE DRDOd. 3D Surveillance Radar for Indian Air Force - Rohini
The 3D Surveillance Radar, Rohini is a ground based mechanically scanning, pulse Doppler radar for air space surveillance to detect and track air targets with reliability, even under hostile EW operational environment. The radar has advanced technologies like digital receiver, and programmable signal processor providing high resolution, accuracy, response and information availability. The advanced software algorithms, multiple high speed processors, and state-of-the-art digital technologies have made the radar an effective but user friendly sensor providing 24 x 7 airspace awareness to the Commanders during peace and war time.

User : Indian Air Force
Status : In Operational use with Airforce.

LRDE DRDOe. 3D Surveillance Radar for Indian Navy - Revathi
3D Surveillance Radar, Revathi is a ship borne mechanically scanning pulse Doppler radar for 3D air space and sea surface surveillance. The radar is capable of providing reliable detection/tracking air targets and sea surface targets even under hostile EW operational environment. The radar is a state-of-art technology. The flexible architecture system is a reliable and adaptable, for multiple applications - early warning for air and sea surface defence weapon system, defence sensor onboard ship. The radar has advanced technologies like multiple simultaneous on receive, digital receiver, programmable signal processor providing high resolution, accuracy, response and information availability.

User : Indian Navy
Status : In Operational use with Indian Navy

LRDE DRDOf. Akash Weapon System for Indian Army and Indian Air Force
It is the primary sensor at the battery level for Akash surface to air missile weapon system which is an air defence system for the Indian Army and Air force. The radar has the capability to perform extensive search, track multiple targets and missiles, and to command and guide own multiple missiles concurrently. The multi functionRajendra replaces multiple radar requirements like surveillance, tracking and guidance. The radar supports autonomous and group mode operations of Akash weapon system.The Radar system is configured on two vehicles - Sensor vehicle and Command post. For Air Force it is configured on trailor with prime movers and for Army it is on Tatra high mobility vehicles.

Users : Indian Air Force and Indian Army
Status : In Operational use with Airforce and Indian Army.

LRDE DRDOg. Weapon Locating Radar (WLR)
WLR is a coherent, electronically scanned phased array radar. The radar automatically locates hostile artillery, mortars and rocket launchers and tracks friendly fire to locate the impact point of friendly artillery fire to issue necessary corrections. The radar is designed to detect projectiles with small cross section across the battle space horizon, and has the capability to handle simultaneous fire from weapons deployed at multiple locations. The fence concept of placing the beam grazing the covered air space makes it difficult for hostile projectiles to escape without detection. The radar helps neutralize hostile guns in the tactical battle space and helps own guns for effective shelling on designated enemy targets.

The radar has been developed for Indian Army to substitute the imported system and acts as a force multiplier for Artillery.

User : Indian Army
Status : Orders placed by Army on Production Agency.

LRDE DRDOh. Low Level Light Weight Radar (LLLR) for Army Air Defence-Bharani Mk I
Low Level Light Weight Radar is a light weight, battery powered and compact sensor, mounted on a quadripod, which provides 2D surveillance solution to alert Army Air Defence Weapon Systems mainly in mountainous terrain against hostile aerial targets like UAVs, RPVs, helicopters and fixed wing aircraft flying at low and medium altitudes. The radar can be transported by vehicles, animal transport or group of men or as heli-slung loads. It can be dismantled into packages to facilitate quick installation and re-location in mountainous terrain. It will act as an early warning provider to air defence weapon systems employed to provide protection to vulnerable areas or vulnerable points in the mountains by the Indian Army.

User : Army Air Defence
Status : In Operational use with Indian Army

LRDE DRDOi. 3D Low Level Light Weight Radar - Aslesha Mk I
It is a multi-faceted ground based 3D low level light weight surveillance radar for deployment in diverse terrains, like plains, deserts, mountains, and high altitude regions. It can detect and track heterogeneous air targets, including helicopters, fighters and UAVs at low and medium altitudes. It provides accurate range, azimuth and height information for each target with electronically steerable multi-beam technology in elevation.

User : Indian Air Force
Status : In Operational use with Air Force


LRDE DRDOj. 3D Tactical Control Radar (3D TCR)
The 3D Tactical Control Radar (TCR) is a stand-alone medium range, all weather 3D surveillance Radar for detection and identification of aerial targets, transmission of pertinent data to Target Data Receiver (TDR). The radar is capable of Track-While-Scan (TWS) of airborne targets for fighter, subject to line-of-sight clearance and radar horizon. The antenna is mechanically rotated in azimuth to provide 360 deg, all around, coverage. The Radar is a state of art technology with highly optimized structure in terms of accuracy and weight together mounted on a TATRA VVL.

User : Indian Navy
Status : User associated trials completed.

LRDE DRDOk. Maritime Airborne Patrol Radar (XV 2004)
XV 2004 is a coherent, multi-mode, pulse-compression, surveillance Radar System that can search and detect sea surface and airborne targets. The System's design features help minimise effects of rain and sea clutter on Radar performance. The Radar has additional weather and beacon modes. The system has been developed for maritime patrol on Naval Advanced Light Helicopter and can be fitted on fixed wing platforms as well. The multi platform portable radar has the potential for use by all the three Services and Coast Guard and has established airborne radar technology in the country.

User : Indian Army
Status : Under Induction

Major Technologies

LRDE has developed many advanced radar technologies including transmit and receive modules, slotted waveguide array antennas, microstrip array antennas, multibeam antennas, high power transmitters, high purity signal sources, high bandwidth waveform generation systems, programmable signal and data processors and radar controllers. The technologies include

Antenna Technology:

LRDE has the expertise in developing various types of antenna for different applications.

  • Reflector Antenna : It has a doubly Curved profile with high Gain and broad bandwidth. It is segmented in small sizes for man/mule transportability for deployment in mountainous terrain.


  • Slotted Wave Guide Antenna : It gives a rugged structure with low SLL. Low loss, light weight and high gain. Slotted Wave Guide antenna are developed for various bands and applications.


  • Microstrip Patch Antenna : It is a low profile and light weight antenna with superior electrical performance in terms of its bandwidth and pattern characteristics. It is easy to integrate with MMICs and capable of dual and triple frequency operations.


  • Multi-Beam Antenna : It generates different types of beam from same aperture with more volumetric coverage. Very Low Side Lobe pencil beams in azimuth and simultaneously multiple beams during Rx mode and shaped beam for required volumetric illumination in Tx mode.


  • Passive Phased Arrays : It has individual radiators with integrated Phase Control Module, distributed architecture, efficient scan coverage, beam agility and high reliability.


  • Active Phased Arrays : It has integrated radiators with integrated TRM with solid state technology, distributed architecture, efficient scan coverage and high reliability.


TR Module Technology:

  • Silicon (SI) BJT based TRM : Frequency of operation upto C-Band, power output upto 400 W and Class-C operation.


  • Silicon (SI) LDMOS based TRM : Frequency of operation upto C-Band, power output upto 500 W and Class-AB operation.


  • Gallium Arsenide (GaAs) based TRM : Frequency of Operation upto Ku-Band, Power output upto 20 W and Class-AB operation.


  • Gallium Nitride (GaN) based TRM : Frequency of Operation L, S & C-Band, Power output upto 400 W and Class-AB operation.


Exciter / Transmitter / Receiver:

  • Exciter : Frequency Band L to Ku Band with 2 GHz RF Band Width, Programmable frequency spots and Waveforms. Wave form band width from 5 MHz to 800 MHz.


  • Transmitter : Bands from S to Ka, CFA, Klystron, TWT devices.


  • Receiver : Designed from VHF to Ku Band, Single, Dual, Quad, Six and Eight channel Analog Receiver and Six and Eight Channel Digital Receiver

Mechanical Engineering :

  • Design & devoplment of Antenna Sub Assemblies, Antenna Assemblies and Pedestals


Power Systems:

  • DG Sets, UPS & Power Distribution : DG Sets : 2 KW to 1500 KW, UPS : Static : 400 KW, Diesel Rotary : 1200 KW, Power Distribution : AC : 20 amps to 2000 amps, DC : 50 amps to 750 amps and Power Supplies : 2 KW to 25 KW

    Algorithms & Functionalities

    • Signal Processing
      • Digital Pulse Compression
      • MTI
      • CFAR
      • Clutter Map
      • ZVF
      • Binary Integration
      • Centroiding (Doppler, Range, Az, Elevation)
      • Jamming Analysis
      • Monopulse Computation
      • SLB / SLC
      • k
      • Clutter Doppler Estimation
      • Ambiguity Resolution
    • Data Processing
      • IMM
      • GNN with Munkers Algorithms
      • LMS
    • Image Processing
      • Change Detection
      • Image Segmentation
      • Moving Average Subtraction
      • Image Enhancements
      • Geometric Corrections
      • Speckle Removal
      • Migration Correction
      • ISAR
    • Platform Motion Estimation & Compensation
    • Platform Stabilization
    • Radar Computer/ Resource Management
      • Surveillance
      • Tracking
      • IFF Tracking
      • Target Classification
      • Multi Sensor Data Fusion
      • Networking of Radars
    • Weapon System
      • Cued Acquisition
      • Threat Evaluation
      • Weapon Control
      • Weapon Guidance
      • Kill Assessment
    • Weapon Location & Fire Direction
      • Trajectory Computation
      • LP& IP Computation