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21-2 EW, Acoustics and EO > EW and Radar > Flashcards

EW and Radar Flashcards

1
Q

Components of a Pulsed Radar Transmitter. (3)

A

Master Time Generator
Modulator
Oscillator

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2
Q

Components of a Pulsed Radar Display. (2)

A

Display

Timebase Generator

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3
Q

Components of a Pulsed Radar System. (6)

A 
Transmitter
Tx/Rx Switch
Aerial
Amp
Superheterodyne Receiver
Display
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4
Q

What is Electronic Warfare? (1)

A

Any military action that involves the use of the EM Spectrum

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5
Q

What are the components of EW? (3)

A

Electronic Attack
Electronic Support
Electronic Protection

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6
Q

What are the components of EA? (3)

A

Jamming
Deception
Neutralisation

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7
Q

What are the components of EP? (4)

A

EMCON
Masking
Hardening
WaRMs

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8
Q

What are the components of ES? (2)

A

Threat Warning

SIGINT

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9
Q

What is Electronic Attack? (1)

A

Use of the EM Spectrum to degrade, deny, disrupt or destroy enemy capability

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10
Q

What is Electronic Protection? (1)

A

All actions taken to protect friendly personnel from the effects of enemy and friendly use of EM

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11
Q

Types of RWR. (2)

A

Digital Crystal Video Rx

Wide Band Scanning Super Heterodynes

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12
Q

Characteristics of a DCVR. (3)

A

Wide bandwidth
Relatively low sensitivity
New systems have IFM with MDD

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13
Q

Pros and Cons of a DCVR. (4)

A

+ves

Wide open receiver gives good probability of detection
Radars do not have to be in the MDD to be intercepted

-ves

Lower sensitivity than SHR
Some can only give RF by band which can result in ambiguities

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14
Q

Characteristics of an SHR. (3)

A

Narrow bandwidth
High sensitivity
All have IFM

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15
Q

RWR Components. (5)

A 
Antennae
Processor and power supply
Control Panel
Audio output
Display output
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16
Q

Types of MWS. (3)

A

Radar MWS
IR MWS
UV MWS

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17
Q

3 stage process of an MWS. (3)

A

Detect
Track
Declare

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18
Q

What does an MWS detect? (3)

A

Muzzle flash
Relative velocity
Motor ignition

19
Q

MWS requirements. (5)

A 
Spherical coverage
LREW
Speed
Low false alarm rate
High probability of detection
20
Q

3 stage process of a missile. (3)

A

Boost
Sustain
Coast

21
Q

Characteristics of a Radar MWS. (4)

A

Detects an object due to its mass/RCS
Detects targets PD shift
Affected by size, speed and AoA
Overt

22
Q

Characteristics of an IR MWS. (4)

A

Detects IR emissions from muzzle flashes, motor ignition etc.
IR not as scattered as UV so provides good AoA
High false alarm rate due to IR clutter at low levels
Fitted to larger aircraft as detector unit needs to be cooled

23
Q

Characteristics of a UV MWS. (3)

A

Detect UV emissions from rocket motors and muzzle flashes
Relatively small, light, inexpensive and don’t require cooling
Detection range is limited due to atmospheric conditons

24
Q

Types of IR countermeausure. (3)

A 
IRCM
- 360 coverage from lamp
DIRCM
- Directed beam to trash missile
LAIRCM
- DIRCM for larger aircraft
25
Q

How do we detect EO-guided ordnance? (1)

A

We don’t initially

26
Q

What are the combat DF elements of Electronic Support? (2)

A

ELINT

COMINT

27
Q

Characteristics of ManPADS. (4)

A

Cheap
Portable
Versatile
Short range + low-med alt

28
Q

Anatomy of a missile. (6)

A 
Motor
1st Stage Booster
Sensor
Datalink
Guidance + control
Warhead
29
Q

Missile engagement process. (5)

A 
Search
Target acquisition
Target tracking
Launch
Intercept
30
Q

Missile guidance loop. (4)

A

Sensor
Error
Guidance system
Steering

31
Q

Phases of missile flight. (5)

A 
Eject
Launch
Mid-course
Terminal
Detonate
32
Q

Missile guidance techniques, not systems. (3)

A

Command guidance
Beam Riding
Track via missile

33
Q

Command guidance process. (3)

A

Missile and target tracked
Missile path calculated
Steering commands uploaded

34
Q

Difference between CLOS and COLOS. (2)

A

CLOS
- Pure pursuit
COLOS
- Target location prediction

35
Q

Command guidance characteristics. (4)

A

Not fire and forget
Overt
Multiple targets tracked simultaneously
Susceptible to countermeasures

36
Q

Beam riding characteristics. (4)

A

Not fire and forget
Overt
Single engagement
Hard to decoy

37
Q

Passive guidance characteristics. (4)

A

Fire and forget
Covert
Increased signal strength the closer to the target it gets
Susceptible to countermeasures

38
Q

Semi-active guidance characteristics. (4)

A

Not fire and forget
Overt
Increased signal strength the closer to the target it gets
Susceptible to countermeasures

39
Q

Active guidance characteristics. (4)

A

Fire and forget
Overt
Increased signal strength the closer to the target it gets
Susceptible to countermeasures

40
Q

Fox codes. (3)

A

Fox 1 - Semi-active
Fox 2 - Passive
Fox 3 - Active

41
Q

TvM guidance characteristics. (4)

A

Not fire and forget
Overt
Single, multi function radar
Susceptible to countermeasures

42
Q

ESM bearing measurements. (3)

A

Time
Phase
Amplitude

43
Q

MEZ encroachment message. (4)

A

C/s
TRESPASS
Missile system
System location from RP

44
Q

Types of jamming. (2)

A

Noise jamming

Deception jamming

21-2 EW, Acoustics and EO (1 decks)

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