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Astra (missile)

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For the naval surface-to-air variant of the missile, see VL-SRSAM.

Astra
Astra Mk-1
TypeBeyond-visual-range air-to-air missile
Place of originIndia
Service history
In service2019 (2019)–present
Used by
Production history
DesignerDefence Research and Development Laboratory (DRDO)
ManufacturerBharat Dynamics Limited
Unit cost₹7−8 crore (US$−940,000)
Produced2017 — Present
Variants
  • Astra Mk-1 (Operational)
  • Astra Mk-2 (Trial-phase)
  • Astra Mk-3 (Trial-phase)
  • Astra-IR (Designing-phase)
  • VL-SRSAM (Trial-phase)
Specifications
Mass154 kg (340 lb)
Length3.84 m (12.6 ft)
Diameter178 mm (7.0 in)
WarheadHigh-explosive pre-fragmented HMX/PU[1]
Warhead weight15 kg (33 lb)
Detonation
mechanism
Engine
PropellantSolid fuel
Operational
range
  • Astra IR: 80 km (50 mi)[2]
  • Astra Mk-1: 110 km (68 mi)[3]
  • Astra Mk-2: 160 km (99 mi)[3]
  • Astra Mk-3: 350 km (220 mi)[4][5]
Flight ceiling20 km (66,000 ft)
Maximum speed Mach 4.5 (Astra Mk 1) [6]
Guidance
system
Mid-course: Fibre-optic gyro based inertial navigation system with mid-course update via datalink.
Terminal: Active radar homing
Launch
platform
References[9][10][11][12][13][14]

Astra (Sanskrit: "Weapon") is an Indian family of all weather beyond-visual-range air-to-air missile, developed by the Defence Research and Development Organisation. Different missiles of this family are capable of engaging targets at varying distances of 500 m (0.31 mi) up to 340 km (210 mi).[15] Astra Mk-1 has been integrated with Indian Air Force's Sukhoi Su-30MKI and will be integrated with Dassault Mirage 2000, HAL Tejas and Mikoyan MiG-29 in the future. Limited series production of Astra Mk-1 missiles began in 2017.[9][16][17]

Description

[edit]

Astra Mk-1 is 3.6 m (12 ft) long with a diameter of 178 mm (7.0 in) and weighs 154 kg (340 lb). It uses mid-course inertial guidance driven by fibre-optic gyroscope with terminal guidance through active radar homing.[18] It is capable of receiving course corrections through a secure data link. The missile's active radar seeker, with a homing range of 25 km (16 mi), was designed by Russia's Concern Morinformsystem-Agat but manufactured within India.[11] The seeker can lock-on to a target with a radar cross section of 5 square metres from a distance of 15 km and enables off-boresight launches up to an angle of 45°.[19] Some tests have been conducted in 2017 and 2018 using an indigenous seeker.[20][21][22][23] It is an improved active Ku, X band monopulse radio-frequency (RF) seeker developed by Research Center Imarat.[24] [better source needed]

Astra Mk-1 is equipped with electronic counter-countermeasures to allow operation even during enemy attempts to jam the seeker using electronic countermeasures. It carries a 15 kg (33 lb) high explosive pre-fragmented warhead activated by a proximity fuse.[11] It uses a smokeless solid fuelled motor that can propel the missile to a speed of Mach 4.5 and allows operation from a maximum altitude of 20 km (66,000 ft).[12][11] Its maximum range is 20 km (12 mi) in tail chase mode and 110 km (68 mi) in head on chase mode.[25] The maximum range is achieved when the missile launched from an altitude of 15 km (49,000 ft). When it is fired from an altitude of 8 km (26,000 ft), the range drops to 44 km (27 mi) and when it is launched from sea level, the range drops further to 21 km (13 mi).[26] It can be launched in both autonomous and buddy mode operation and can lock on to its target before or after it is launched.[27]

Development

[edit]
Astra Mk-1 fired from Su-30MKI

Preliminary work on Astra Mk-1 had begun by 1990 with the completion of a pre-feasibility study.[28] It was revealed to the public for the first time at Aero India 1998.[29] It was described as an elongated Matra Super 530D with a smaller diameter in front of the wings.[30] The project to develop the missile was officially sanctioned in 2004 with a budget of ₹955 crore (equivalent to ₹34 billion or US$400 million in 2023).[31] The project was to be led by Defence Research and Development Laboratory with assistance from Hindustan Aeronautics Limited and Electronics Corporation of India Limited.[32] The initial version of Astra Mk-1 reportedly weighed 300 kg (660 lb) with a range of 25–40 km (16–25 mi) and was planned to be integrated with HAL Tejas. It was tested for the first time in May 2003.[33]

The missile was redesigned around 2006 due to control issues and performance deficiencies at high altitude. The initial design of four cruciform short-span long-chord wings were replaced by cropped delta wings placed near the nose. The redesigned missile had an improved propulsion system and was tested for the first time in 2008.[34] By 2013, the missile had been redesigned again in response to multiple failures caused by adverse interactions between flight control surfaces.[35] The control, guidance, and propulsion systems were also reconfigured.[36] After the second redesign, the missile was lighter than the initial version by around 130 kg (290 lb). It was tested from the ground thrice in December 2012 and captive trials from a Sukhoi Su-30MKI were held in April 2013.[37][35] The aerodynamic characterization research was conducted at the National Aerospace Laboratories' 1.2m Trisonic Wind Tunnel Facility.[38]

Variants

[edit]

Air-to-air missile versions

[edit]
Further information: Solid Fuel Ducted Ramjet
Solid Fuel Ducted Ramjet propulsion test on February 8, 2019

After the deployment of Astra Mk-1, several offshoot versions are being planned, including an imaging Infra-red homing missile tentatively classified as Astra-IR, a longer-range Astra Mk-2 version and a further development called Astra Mk-3.[39]

India's DRDO is undertaking work on a Mk-2 version of the Astra missile and has planned to enhance its range using an in-house developed dual-pulse rocket motor by May 2022.[40][41] The missile will have a similar design as well as share the smokeless propulsion of its predecessor Mk-1, boast a laser proximity fuze and some newer technologies like a home-grown AESA radar seeker.[42][23][34] DRDO plans to extend the range of the Mk-2 version to 160 kilometres (99 mi), rivalling the American AIM-120D AMRAAM.[43][13]India is planning to carry out the first test of the Astra Mark 2 missile in next few months.[44]

A future Mk-3 variant based on a Solid Fuel Ducted Ramjet (SFDR) engine is being jointly developed by India and Russia.[45][46] The missile was first tested on 30 May 2018 and further test was carried out on 8 February 2019.[47][48] The aim of the program to develop an indigenous missile rivalling the AIM-260 JATM and MBDA Meteor.

Surface-to-air missile versions

[edit]
Main article: VL-SRSAM
Maiden launch of VL-SRSAM on February 22, 2021

To fulfill the need of Indian Navy's replacement of Barak-1 short range surface-to-air missile system, DRDO successfully test fired two VL-SRSAM on 22 February 2021 at Odisha coast. The maiden launch tested the efficacy of vertical launch system and missile's maximum and minimum range. Both the missile successfully intercepted their target with pin point accuracy.[49]

VL-SRSAM supersedes the cancelled Maitri missile project undertaken jointly by MBDA and DRDO based on the work done on MICA and Trishul.[50] The missile will arm Indian Navy ships like tḥe Kamorta-class corvette as a short range air defense system. The missile uses jet vane based thrust vectoring control for high maneuverability. The missile may be guided by the Revathi radar which is being used extensively in Indian Navy ships like the Kamorta-class corvette.[51]

Indian Air Force may also sport VL-SRSAM in truck-based launchers to supplement its Akash surface-to-air missile as a quick reaction system, similar to the Norwegian/American NASAM 2.[52][53]

Trials

[edit]

Astra Mark-1

[edit]

Astra Mk-1 went through a series of ground tests from 2003 till 2012 in three different configurations to validate the airframe, propulsion system, control system, dual mode guidance and night firing capability. Carriage trials were carried out in 2009 and 2013 on Sukhoi Su-30MKI.[54][55] In May 2014, it was fired for the first time in air.[56] On 18 March 2015, it successfully performed manoeuvre of upto 30g while engaging the target.[57] The missile was fired in public during Iron Fist 2016 exercise from Sukhoi Su-30MKI.[58] During a series of seven tests in September 2017, Astra Mk-1 was tested twice with an indigenous seeker.[21] During user trials in 2019, it hit a target at a distance of 90 km (56 mi).[59]

HAL Tejas LSP7 during a maiden firing of Astra Mk1 missile

Astra Mk-1 with an indigenous seeker (instead of a Russian variant supplied by AGAT) is expected to be tested for the first time in May 2022.[40]

Astra Mk-1 was successfully fired from HAL Tejas aircraft on 23 August 2023.[60]

Astra Mark-2

[edit]
Astra Mk-2 dropped from Su-30MKI using Unified Common Launcher

During an annual press conference on October 4, 2022, IAF released footage of an Astra Mk-2 launched from a Su-30MKI using Unified Common Launcher developed by DRDO with industry partners for air-to-air missiles.[61]

Reports released in April 2024 suggested that the missile will be tested in first half of 2024 with an initial target range of around 130 km.[62][63][64]

Reports in September 2024 suggested that a series of developmental and user trials of the Astra Mk 2, with a range of 140-160 km, will be conducted in 2025 which will be completed by 2026 and followed by induction in the same year. Full scale production is expected by 2027. There has been a few design modifications which led to delays.[65][66]

Astra Mark-3

[edit]
See also: Solid Fuel Ducted Ramjet

As per Ministry of Defence's Year End Review, Astra Mk-3 with solid fuel ducted ramjet (SFDR) propulsion was flight tested in 2023 which enabled the missile to intercept aerial threats over a far greater distance at supersonic speed. The missile was configured with nozzle-less booster, thrust modulation system and a sustainer engine to deliver specific impulse in ramjet mode.[67]

Production

[edit]

Astra completed final development trials in September 2017 and was cleared for production by Bharat Dynamics Limited (BDL). The missile will be manufactured at Bhanur, Telangana for an initial order of 50 missiles. Additional order of 248 missiles were placed for Indian Air Force (200) and Indian Navy (48) for use on various platforms like Sukhoi Su-30MKI, HAL Tejas, MiG-29 / MiG-29K.[25][9][14][68]

On 31 May 2022, Ministry of Defence (MoD) signed contract with BDL worth ₹2,971 crore (US$383 million) to produce 350+ units of Astra Mk-1 for Indian Air Force and Indian Navy under high priority Indian Designed, Developed and Manufactured (IDDM) category.[69] DRDO already started the process of transferring technology of the missile and associated systems to BDL. Each missile will cost ₹7–8 crore.[70] Astra Mk-1 along with other variants of this missile will progressively replace all Russian origin long range air to air missile in Indian fleet.[71]

On 14 January 2024, Minister of State for Defence, Ajay Bhatt flagged off the first production batch of Astra for the Indian Air Force from Bharat Dynamics Limited's Kanchanbagh Unit in Hyderabad.[72][73] The missile received full-rate production clearance on 4 August 2024. The clearance was granted by Air Force Deputy Chief Air Marshal Ashutosh Dixit on hist visit to Hyderabad unit of BDL.[74][75]

Exports

[edit]

It was published in August 2023 that Brazil was exploring possibility of equipping its Gripen fighters with Astra Mk-1 missiles as a cost-effective option.[76] According to a report published in The Print on September 14, 2024, Armenia has inquired about the possibility of purchasing Astra Mk-1. Discussions are in early stages.[77]

Operators

[edit]
 India
[edit]

See also

[edit]

References

[edit]
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