EW5 - Electronic Attack - Neutralisation

Question 1

Describe Neutralisation.

Answer 1

The deliberate use of electromagnetic energy to either temporarily
or permanently damage enemy’s devices which rely exclusively
on the electromagnetic spectrum.

Primarily through use of Directed energy.

Question 2

Explain Open Loop Jammers.

Answer 2

Directs generic beam at the missile seeker to jam it.

Question 3

Explain Closed Loop Jammers.

operation

Answer 3

• Referred as ‘Smart DIRCM’.
• Bounces laser energy off missile’s seeker;
• Analyses to determine type of seeker;
• Then selects laser modulation most effective in countering particular type of seeker.
• More flexible & better able to cope with new seeker designs.
• Rely on a MAWS to determine missile’s relative bearing for energy to be aimed at.

Question 4

GRCCI

Describe Hot Brick IR Jammers

Answer 4

• Generic waveform against all threats.
• Require prior knowledge of a specific missile.
• Can not change modulation in real time.
• Consume large amounts of power.
• Ineffective against modern IR missiles;
  – Complex scan patterns,
  – Counter modulated signals.

Question 5

Describe Arc Plasma IR Jammers

Answer 5

• More complex than Hot Brick types.
• Flexible modulation in real time.
• Ineffective against modern IR missiles;
  – Complex scan patterns,
  – Counter modulated signals.

Question 6

DPVC

Describe DIRCM IR Jammers

Answer 6

• Direct high power narrow beam IR laser into missile seeker.
• Produce flexible modulation.
• Very large Jam to signal ratio.
• Consume very little power (<5W).

Question 7

What are the two main groups of IR Jammers

Answer 7

– Omni-Directional &,
– Directional.