DRDO SHYEN Maritime Patrol Suite for Dornier 228

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SHYEN (SENTINEL FOR MARITIME DOMAIN AWARENESS)


DRDO SHYEN Maritime Patrol Suite for Dornier 228 (Brochure AERO INDIA 2025)


KEY FEATURES
SHYEN is an integrated sensor suite consisting of Maritime Patrol Radar. Electronic Support Measures System, Electro Optical Infra-Red System and Software Define Radio which generates a comprehensive surveillance picture of the targets from Radar or ESM or EOIR (Day/lR image) enabling classification and target identification communicating via SDR data link for enhanced Maritime Domain Awareness

SPECIFICATIONS
> KSHITIJ Maritime Patrol Radar
• Long Range, 360 degree rotating AESA based Maritime Surveillance Radar
• Comprehensive Sea Surveillance, Air Surveillance, Ground Surveillance (Spot/Strip SAR & GMTI) and Navigation Aide (Weather & Search/Rescue)
• Artificial intelligence for Target Classification

> ESM
• Interception, Analysis and Geolocation of Ground, Shipborne and Airborne Emitters, Wide Spectral and Spatial Coverage
• High Accuracy of Parameters including Direction Finding (DF)
• Tactical, Situational & Tabular Views for Situational Awareness

> EOIR
• SWaP optimized State-of-Art common aperture optical channel
• HD imagery, Day TV Camera, Thermal Imager, Short Wave & Medium Wave Infra-Red Camera
• Loser Designator cum eye-safe Laser Range Finder (LDRF)
• Line-of-Sight Target Detection and Automatic Target Tracking

> Software Defined Radio (SDR)
• Communications services in V/UHF band, L Band and Line SATCOM band
• Support for Air-Ground, Air-Ship and Air-Air Communications
• Software Architecture conforming to SCA 4i

KSHITIJ Maritime Patrol Radar (Image Data Patterns Earnings Presentation Q4 FY 2023-24)


KSHITIJ Maritime Patrol Radar installed on DRDO Do 228 Test Bed (Image DRDO Compendium - Product For Export PDF 2025)

AI Enhanced Version

Original Image

EOI2SS EOIR System (Image AERO INDIA 2025)



New Updates

06 March 2023 : LRDE Tender
Installation of KSHITIJ Radar ESM EOIR and SDR payloads on DRDO FTB (Tender Refrence Number : LRDE/MMFD-PUR/22-23/23ATT035)

1. Introduction
LRDE has undertaken a project which is aimed at indigenization of four critical payloads for the Do-228 aircraft. The details of payloads and corresponding DRDO labs responsible for their development are indicated below:

S.N.  Payload    DRDO Lab
1. KSHITIJ Maritime Patrol Radar  LRDE
2. EOIR (Electro Optic Infra-Red) IRDE
3. SDR (Software Defined Radio) DEAL
4. ESM (Electronic Support Measure) DLRL

1.1. System Configuration
LRDE is the nodal lab and is responsible for Aircraft Modification, Installation, Integration and Demodification of Payloads (KSHITIJ Radar, ESM, EOIR, SDR) intended for Do-228 Aircraft. As HAL is the OEM for Do-228 Aircraft, the activity of installation of the payloads on the aircraft, clearances for/and shakedown trails will be done by HAL. DRDO, FTB (Do-228, Tail No: KD707) for will be used for payload installation and evaluation purposes.
• Four Payloads to be developed as part of the project (KSHITIJ Radar, ESM, EOIR, and SDR).

3. Electronic Support Measure (ESM)
3.1. System Description
The ESM System will receive signals in the frequency band of 0.5-40GHz according to the mission programmed by the operator. The pre-flight mission data programming will be operator selectable with flexibility in system programmable features. The received signals after suitable conditioning and amplification will be processed by fast sampling Processing units with Instantaneous Bandwidth of 1000 MHz to supply the emitter tracks. Further sub bands can be programmed at digital level. The facility of inter and intra pulse analysis and library matching will be provided as an inherent feature of the system. The product tree is shown below

ESM Payload
• Antennas
1. CDF CBS Antenna 0.5-2 GHz
2. FDF LW CBS Antenna Array 0.5-2GHz
3. FDF CBS Antenna Array 2-18GHz
4. FDF CBS Antenna Array 18-40GHz

• Front End Electronics
5. Quad Channel 18-40GHz FER
8. Dual FEA with BITE
6,7,10. Switching Units (RFCU, RFSSU-I, RFSSU-II)

• Receiver/Processor/Controller
09. Narrow Band RF LRU
11. Digital Direction Finding LRU
12. Power Supply Distribution Unit
13. SCD LRU


3.2. DLRL Responsibility : Hardware
ESM LRUs
BLI Antenna Array
ADF CBS Antenna
BLI Antenna Array
BLI Antenna Array
Quad channel
RFSSU-I
RFCU
NB RF
RFSSU-II

4. EO-IR (IRDE)
4.1. System Description
The Electro Optical Imaging Intelligent Stabilized System (EOI2SS) being developed for surveillance aircraft will be high performance dual axis 4 – Gimbal stabilized sighting systems for long range surveillance and reconnaissance with advanced tracking and image processing features and various digital interfaces. EOI2SS will be primarily a surveillance sight for the Do-228 aircraft for surveillance over sea/ocean. It will consist of EO sensors viz. Thermal Imager (Zoom & NFOV Spotter) (IIIrd Gen, MWIR, HD), Day TV (Zoom & NFOV Spotter (Colour, HD), SWIR Camera (NFOV Spotter) (HD) & Eye Safe Laser range finder / Laser Target Designator. Video target tracking capability facilitates high precision aiming on the target in dynamic conditions. The system will have advanced Tracking features and Geo Pointing and Geo Steering features. This facilitates long range surveillance, target acquisition and auto tracking during day as well as night

5. Software Defined Radio (SDR)
5.1. System Description
Airborne SDRs are the latest development in Aviation communication which provides encrypted Voice and Data capability including Mobile Adhoc Networking.

Both the Radio-LRUs will support V/UHF band on one channel having integrated 25W V/UHF PA, 50 watts L-Band and 100 watts UHF Band SATCOM PAs inside the LRU. A Radio Control Unit (RCU) will be used for management, configuration, monitoring and waveform/crypto parameters loading. 04-RCU configuration as per Naval requirements has been finalized – 02 (Master + Standby) in the central pedestal of cockpit and 02 at operator station in the rear. Later on, the 02 rear RCU will be replaced with HMI on TMS consoles as and when available. This multi-channel radio will have multiple data and audio ports. The voice will be interfaced with Audio Management Unit of the Airborne Platform (02 V/UHF + 01 UHF SATCOM).

The SDR system will be a four-channel radio having two V/UHF (30-512 MHz) channels, one L-Band (960-1240 MHz) and one UHF SATCOM channel. The SDR systems comprises of 03 major LRUs:


09 March 2023
LRDE to start the integration of KSHITIJ X-Band AESA Radar, ESM, EOIR and SDR under the Do-228 indigenization program.
Activity of installation of the payloads on the aircraft, clearances and shakedown trails will be done by HAL. 
DRDO, FTB (Do-228, Tail No : KD707) will be used for payload installation and evaluation purposes.


03 November 2024
A very cool news
For the MLU for 25 Navy Do 228, DRDL under Project SHYEN S-22 has developed local ESM modules.
On Sep 27, 2024, ESM system received approval for installation, development, and user flight trials following the successful completion of user laboratories evaluation


14 February 2025
DRDO's Maritime surveillance aircraft based on Dornier 
"The Project SHYEN" 
Features: KSHITIJ Maritime Patrol Radar
Electronic Support Measure
EO/IR Turret
Local SDR



20 February 2025
DRDO Flying test bed Anushandhan kitted out with Shyen mission suite. 
Shyen comprises a GaN based aesa search radar, common aperture long range EO, ESM and COMINT systems.
This Do 228 flew at Aero India 2025 with Dr BK Das, DG ECS, DRDO.




03 June 2025 : DRDO Products For Export 2025 PDF

Kshitij : Maritime Surveillance Airborne X Band Radar System
The versatile Maritime Surveillance Airborne X Band Radar System is designed for maritime surveillance and Search and Rescue (SAR) missions. It is easily adaptable to a variety of platforms for search, detection and tracking of multiple targets at long range. The radar has good sea-clutter suppression features to detect small targets. In addition to the standard air to sea surface search modes with TWS, this radar provides high resolution range signature and ISAR image of the target which enables the user to classify the intercepted target. There is an air to air mode to detect and track aerial targets. Other modes include weather avoidance, beacon and navigation. The Radar provides 360° azimuth coverage in both belly and chin mounted configuration.

Main Features
• Programmable signal and data processor
• Sea-clutter mitigation techniques
• Short blind zone for landing on ship
• High instantaneous bandwidth
• High resolution modes - RS and ISAR
• Interleaved TWS and RS Profile
• Staring mode for ISAR
• Display orientation
• Aircraft heading reference
• North reference
• Fixed ground reference (True motion)
• Navigation waypoint and ground map overlay
• Weather avoidance with 4 color coding
• Detection of SART Beacon for search and Rescue
• ECCM

16 November 2025 : MoD Annual Report Year 2024-25

Kshitij Radar for Shyen Project
DRDO is the nodal organization for development of the sensor suite for the Dornier Mid Life Upgrade program of the Indian Navy. The Radar uses an X band active array antenna with Transmit Receiver (TR) modules in a tile configuration. The development flight sorties for radar were conducted & Synthetic Aperture Radar (SAR) imagery for planned test points was obtained. During the year 2024, User Lab Evaluation has been completed in two phases for Electronic Support Measures (ESM) system. The ESM System is being installed in the Aircraft at a DPSU

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