Rudram-1

The Rudram-1[6] (IAST: Rūdram, meaning remover of sorrows;[7] namesake Rudra, project previously referred as DRDO Anti-Radiation Missile (ARM) or new generation anti-radiation missile (NGARM)) is an air-to-surface anti-radiation missile in development by the Defence Research and Development Organisation of India.[8] It is primarily meant for suppression of enemy air defenses (SEAD), that can be launched from a range of altitudes with large standoff distance[9][10] for destroying enemy surveillance radars, tracking and communication systems.[11][12] It is first anti-radiation missile to be developed in India[13][14] and will be jointly produced by Bharat Dynamics Limited (BDL) and Bharat Electronics Limited (BEL) after trials and introduction.[15]

Rudram-1 (NGARM)
TypeAir-to-surface anti-radiation missile[1]
Place of originIndia
Service history
In service2022 (planned)[2]
Production history
Designed2012–present
ManufacturerBharat Dynamics, Bharat Electronics, Defence Research and Development Organisation, Premier Explosives
Specifications
Mass600 kg (1,300 lb)[3]
Length5.5 m (18 ft)
WarheadPre-fragmented warhead
Detonation
mechanism
Optical proximity fuze
EngineDual-pulsed rocket motor
PropellantSolid fuel
Operational
range
15 to 200 km (9.3 to 124.3 mi)[4]
Flight altitude15 km to 500 m
Maximum speed Mach 2[5]
Guidance
system
Mid-course: Inertial navigation system with GPS/NavIC satellite guidance with passive homing on emitter
Terminal: Millimeter-wave active radar homing[2]
Accuracy10 m CEP
Launch
platform

Description

Defence Research and Development Laboratory (DRDL) is the primary agency which carried out the design and development of the missile system along with Armament Research and Development Establishment (ARDE), Defence Electronics Research Laboratory (DLRL), High Energy Materials Research Laboratory (HEMRL), Research Centre Imarat (RCI) and Terminal Ballistics Research Laboratory (TBRL).[16] Many subsystem level developmental works were outsourced to private sector players.[17] Software Labs of the Indian Air Force (IAF) helped in the integration of DRDO ARM with Sukhoi Su-30MKI while the Hindustan Aeronautics Limited (HAL), Nasik Division did the AKU-58 launcher modification which undertook extensive wind-tunnel tests at National Trisonic Aerodynamic Facilities (NTAF) division of National Aerospace Laboratories (NAL), Bengaluru.[18][19][20]

DRDO ARM has a range of 100–250 km[21][22] which is made to be integrated with Sukhoi Su-30MKI as its primary test platform, although can be used with Dassault Mirage 2000, SEPECAT Jaguar, HAL Tejas and HAL Tejas Mark 2/MWF in future.[1] According to the then Director of Research Centre Imarat (RCI), G. Satheesh Reddy, the missile will feature a millimetre wave seeker (mmW)[23] transmitting on frequencies of 30 Gigahertz (GHz) and above while capable of lock-on before launch and lock-on after launch modes.[24][25] Mid-course guidance is accomplished through inertial navigation system (INS) combined with GPS/NavIC satellite guidance through digital filtering as fall back to correct accumulated errors and a passive homing head (PHH) seeker which is developed by DLRL that can detect radio frequency emissions from 100 km away. PHH is a wide-band receiver system operating within D band to J band frequency of the electromagnetic spectrum.[26] Its compact front-end structure is due to the use of monolithic microwave integrated circuit (MMIC) technology for identification of radiation emitting sources.[27][28][29]

The missile is a single-stage, approximately 5.5 metre in length and 600 kg[30] of weight with cruciform wing surface to increase high maneuverability and to give constant aerodynamic characteristics similar to Astra BVRAAM.[27] It uses pre-fragmented warhead with optical proximity fuze and is powered by a dual-pulsed solid rocket motor made by Premier Explosives Limited (PEL) under technology transfer from DRDO.[31][32] The dual-pulsed solid rocket motor produces variable thrust within a range of 0.6 to 2 Mach that reduces the overall reaction time while widening the targeting envelope as well as the engagement capability. DRDO ARM can target mobile integrated air-defence system as well as radar station that shutdown to avoid detection.[21][33]

Development and trials

Development had begun by April 2012 at Defence Research and Development Laboratory (DRDL).[34] The project was officially approved in December 2012 with a budget of ₹317.2 crore (equivalent to ₹481 crore or US$67 million in 2019) with project completion by 2017.[35][36] The feasibility studies were done during the period 2012-2013 with the aim is to develop a fully indigenous tactical, anti-radiation capable missile for the Indian Air force (IAF) which is comparable to AGM-88E AARGM, MAR-1, Kh-31P and better than Martel or Kh-25MP.[24]

From 2014, the development of missile picked up interest of the IAF.[19] As of 2014, missile design and hardware development are in progress with first successful flight trial to happen before year 2017.[37] IAF was initially very concerned with the higher weight and shorter range of new missile compare to the western ones due to the use of bulky Russian made radio frequency (RF) seekers.[38] IAF at the same time was also negotiating with USA for 1,500 AGM 88E which IAF was planning to induct in the next five years.[15][39] The technologies that were developed by DRDO for NGARM are wide-band passive seeker, milli-metric wave active seeker, radome for the seekers and dual-pulsed propulsion system which are mostly lessons learnt during the development of Astra and Barak 8.[39]

The Captive Flight Trial–1 (CFT–1) of DRDO ARM was completed on April/May 2016 by No. 20 Squadron of IAF which checked the performance of seeker, navigation and control system, structural capability and aerodynamic vibrations while the Drop Flight Trial (DFT) was completed by December 2016 with the missile released by Sukhoi Su-30MKI at a speed of 0.8 Mach, from 6.5 km altitude.[40][41] Further carriage flight test was carried out to check mechanical/electrical integration as well as software interfacing of the missile before the maiden flight on 18 January 2018, where the missile was successfully flight tested for the first time on parametres such as auto-launch sequence, store separation, control guidance, aerodynamics, thermal batteries, airframe and propulsion without a seeker which were all proven successful.[14] On 25 January 2019, NGARM was fired from a Sukhoi Su-30MKI over Bay of Bengal off the coast of Odisha that hit the designated target with a high degree of accuracy.[42][43] The missile achieved an accuracy within 10 m CEP covering a range of 100 km.[20] The developmental test proved the performance of seeker, structural integrity of the missile, correct functioning of navigation and control system while validation of aerodynamic capability.[27] The missile can strike at distances double the intended range depending upon the altitude. NGARM will further undergo series of carriage and release flight trials to check the performance of seekers against a different range of targets.

Next trials during the period of July to August 2019 will be conducted initially to check the performance of indigenous passive seeker developed by DLRL with further test for an active seeker at later stage.[19] While the crucial sensor technology is yet to be fully mastered by DRDO, the IAF wants fast track development of NGARM due to urgent requirement of newer anti-radiation missile.[44] NGARM developmental trials will resume from 2020 after a gap of two years.[45]

The DRDO Anti-Radiation Missile or NGARM now officially named Rudram-1 was successfully test-fired from Integrated Test Range (ITR), Balasore on October 9, 2020.[46][47][48]

Induction

According to report, the plan is to make the missile a part of the Air Force by 2022 after conducting six to seven more tests. The missile’s passive homing head can detect, classify and engage targets over a wide band of frequencies as programmed. [49]

Future development

DRDO is planning to bring further software improvements to handle a larger variety of targets under various operational conditions while developing a separate ground-based variant to be launched from mobile launcher.[15][19]

See also

References
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  2. Jha, Saurav (8 February 2021). "Developing Any Kind Of Missile Is Not Much Of An Issue For DRDO Anymore: Satheesh Reddy". Delhi Defence Review. Retrieved 8 February 2021.
  3. "India's next-gen anti-radiation missile set for trials". The Week. 21 March 2019. Retrieved 23 October 2020.
  4. Gupta, Shishir (9 October 2020). "India test-fires Rudram 1, its first anti-radiation missile to kill enemy radars". Hindustan Times. ANI. Retrieved 9 October 2020.
  5. Gupta, Shishir (9 October 2020). "India test-fires Rudram 1, its first anti-radiation missile to kill enemy radars". Hindustan Times. ANI. Retrieved 9 October 2020.
  6. "Anti-Radiation Missile 'Rudram' tested successfully off Odisha coast". Sambad. Retrieved 9 October 2020.
  7. Kulkarni, Sushant (11 October 2020). "Why anti-radiation missile Rudram matters". The Indian Express. Retrieved 11 October 2020.
  8. Aroor, Shiv. "After 'Peacetime' Air Strikes, 5 Homegrown Weapons Programs Deserve Govt Priority". Livefist Defence. Retrieved 9 October 2020.
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  10. "DRDO Bets Big On Indigenous Capabilities". Daily Defence News. 9 November 2019. Retrieved 18 February 2020.
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