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BALLISTIC MISSILES

Last Updated on 20th September, 2024
5 minutes, 16 seconds

Description

BALLISTIC MISSILES

Disclaimer: Copyright infringement not intended.

Context:

North Korea test-fired ballistic missiles in latest military display.

Ballistic missiles

  • Power: Ballistic missiles are powered initially by a rocket or series of rockets in stages, but then follow an unpowered trajectory that arches upwards before descending to reach its intended target.
  • Warhead: Ballistic missiles can carry either nuclear or conventional warheads.

Classifications based on their range

  • Short-range: less than 1,000 kilometers (approximately 620 miles), also known as “tactical” ballistic missiles.
  • Medium-range: between 1,000 and 3,000 kilometers (approximately 620-1,860 miles), also known as “theater” ballistic missiles.
  • Intermediate-range: between 3,000 and 5,500 kilometers (approximately 1,860-3,410 miles)
  • Long-range: more than 5,500 kilometers (approximately 3,410 miles), also known as intercontinental or strategic ballistic missiles.

Stages of flight

Ballistic missiles have three stages of flight

Boost Phase

  • This phase begins at launch and lasts until the rocket engine(s) stops firing and the missile begins unpowered flight.
  • Depending on the missile, boost phase can last three to five minutes.
  • Most of this phase takes place in the atmosphere.

Midcourse Phase

  • This phase begins after the rocket(s) stops firing.
  • The missile continues to ascend toward the highest point in its trajectory, and then begins to descend toward Earth.
  • This is the longest phase of a missile’s flight; for ICBMs, it can last around 20 minutes.
  • During midcourse phase, ICBMs can travel around 24,000 kilometers per hour (15,000 miles per hour).

Terminal Phase

  • This phase begins when the detached warhead(s) reenter the Earth’s atmosphere and ends upon impact or detonation.
  • During this phase, which can last for less than a minute, strategic warheads can be traveling at speeds greater than 3,200 kilometers per hour (1,988 miles per hour).

Examples of some ballistic missiles of India

Name of the Missile

Type of Missile

Operational Range

Speed

Agni-I

Medium-range ballistic missile

700-1250 km

Mach 7.5

Agni-II

Intermediate-range ballistic missile

2,000–3,500 km

Mach 12

Agni-III

Intermediate-range ballistic missile

3,500 km – 5,000 km

5–6 km/s

Agni-IV

Intermediate-range ballistic missile

3,000 – 4,000 km

Mach 7

Agni-V

Intercontinental ballistic missile

7,000–8,000 km

Mach 24

Prithvi I

Short-Range Ballistic Missile

40 km - 150 km

-

Prithvi II

Short-Range Ballistic Missile

250km - 350km

-

Dhanush

Short-Range Ballistic Missile

350 – 600 km

-

Shaurya

Medium-Range Ballistic Missile

750 to 1,900 km

-

Prahaar

Short-Range Ballistic Missile

150 km

-

Cruise missiles

  • Cruise missiles are unmanned vehicles that are propelled by jet engines, much like an airplane.
  • Launch platform: They can be launched from ground, air, or sea platforms.

Flight

  • Cruise missiles remain within the atmosphere for the duration of their flight and can fly as low as a few meters off the ground.
  • Flying low to the surface of the earth expends more fuel but makes a cruise missile very difficult to

Guiding system

  • Cruise missiles are self-guided and use multiple methods to accurately deliver their payload, including terrain mapping, global positioning systems (GPS) and inertial guidance, which uses motion sensors and gyroscopes to keep the missile on a pre-programmed flight path.
  • As advanced cruise missiles approach their target, remote operators can use a camera in the nose of the missile to see what the missile sees.
  • This gives them the option to manually guide the missile to its target or to abort the strike.

Must read articles

INDIAN MISSILES: AN OVERVIEW: https://www.iasgyan.in/blogs/indian-missiles-an-overview

PHASE II BMD: https://www.iasgyan.in/daily-current-affairs/phase-ii-bmd

Source

https://epaper.thehindu.com/ccidist-ws/th/th_international/issues/100005/OPS/G2KDBJS6F.1.png?cropFromPage=true

PRACTICE QUESTION

Q.Consider the following missiles:

  1. Agni-I
  2. Agni-II
  3. Agni-V
  4. Prithvi II

How many of the above is/are Intercontinental Ballistic Missiles?

A. Only one

B. Only two

C. Only three

D. All four

Answer: B

Explanation:

Agni-I    Medium-range ballistic missile.

Agni-II   Intermediate-range ballistic missile

Agni-III Intermediate-range ballistic missile.

Agni-IV Intermediate-range ballistic missile.

Agni-V  Intercontinental ballistic missile.

Prithvi II Short Range ballistic missile.

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