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Math!!!! > EO 9 > Flashcards

EO 9 Flashcards

1
Q

Electronic Warfare (EW)

A

Ensure the effective use of the electromagnetic spectrum to friendly forces while denying its use to the enemy.

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2
Q

What are the 3 methods, or divisions, of EW?

A

Electronic Attack (EA), Electronic Protection (EP), Electronic Support (ES)

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3
Q

Electronic Attack (EA)

A

involves the use of EM-directed energy, or anti-radiation weapons to attack personnel, facilities, or equipment with the intent of deceiving, disrupting, denying, or destroying an adversary’s combat capability.

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4
Q

Electronic Protection (EP)

A

Actions taken to attempt to retain use of its electromagnetic equipment, despite the attacking force’s use of EW

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5
Q

Electronic Support (ES)

A

The actions taken to search for, detect, localize, and identify sources of radiated electromagnetic energy for tactical purposes

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6
Q

EA includes attacks on all types of enemy radars and communications such as;

A

Jamming, Chaff, Anti-Radiation weapons, and high power radiation.

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7
Q

Jamming

A

Involves the transmission of undesired signals into enemy recievers with power levels and modulations such that the ability of the receiver to receive and process it’s desired signals is degraded.

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8
Q

What are the types of jamming targets?

A

Radar and Communications

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9
Q

Where can the jammer be located?

A

On the radar target or remote from target

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10
Q

What are the approaches of jamming?

A

Cover jamming and deceptive jamming

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11
Q

Cover Jamming

A

Reduces adversary radar’s ability to detect target

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12
Q

What type of noise modulated signals are used in both radar and communications jamming applications?

A

Cover Jamming signals

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13
Q

Deceptive Jamming

A

Adversary radar sees the return as good, but calculated range or angle is incorrect.

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14
Q

What 2 concepts deal with the effectiveness of jamming?

A

Jamming-to-Signal Ratio (J/S), Burn-Through Range

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15
Q

Self-Protection Jamming

A

Involves the transmission of jamming signals from an asset to protect itself from detection, tracking, or fusing by hostile radar.

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16
Q

Jamming-to-Signal Ratio (J/S)

A

The ratio between the receive power of the jammer and the desired signal in the target receiver.

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17
Q

Remote Jamming

A

Involves the transmission of jamming signals from some other location than that of the target of the hostile radar.

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18
Q

Burn-Through Range

A

The distance from the radar at which the radar can reacquire a target which has been protected by jamming.

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19
Q

Chaff

A

Refers to small metal pieces of aluminum foil or metalized fiberglass that are cut to lengths which allow them to optimally rebroadcast radar signals.

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20
Q

Flares

A

Expendable devices which protect aircraft from heat seeking missiles.

21
Q

Anti-radiation weapons

A

Home in on signals transmitted from hostile emitters.

22
Q

High Power Radiation

A

A technique that involves extremely high levels of transmitted power; three or more orders of magnitude greater than would be required to jam a reciever. (Can be either from lasers or RF transmitters)

23
Q

What is the purpose of high power radiation?

A

To destroy a hosile platform or to destroy an enemy sensor.

24
Q

Noise Jamming (Confusion Jamming)

A

Techniques are used to change the EM environment by transmitting large amounts of power (i.e. noise) within a portion of the spectrum.

25
Q

What is the purpose of a confusion jammer?

A

To reduce the SNR in the receiver, so that actual target returns are lost in the increased noise floor.

26
Q

Barrage Jamming

A

Jamming signal is spread over several frequencies

27
Q

Spot Jamming

A

Is a technique in which electronic attack(EA) aircraft transmit a concentrated beam of RF energy on the same frequency as the radar is transmitting.

28
Q

Spot jammers

A

Can use methods of frequency agility to compensate for the narrow coverage they provide.

29
Q

Multiple Spot Jamming

A

Uses multiple jammers simultaneously, each on a different frequency

30
Q

Sequential Spot Jamming

A

Uses varying frequencies, rapidly jumping from on RF to another in a programmed manner

31
Q

Swept Spot Jamming

A

Tunes the center frequency of a spot jamming signal to “sweep” over a specified bandwidth.

32
Q

What is the goal of deception jamming?

A

To cause the victim to lose track of real targets and waste time, processing, and weapons on false targets.

33
Q

Why are deception jammers called “repeater jammers”?

A

The systems retransmit or repeat the victim radar’s signal.

34
Q

What are the types of deception jamming?

A

Range, velocity, and angle

35
Q

What is the purpose of Electronic Support (ES)?

A

To acquire the information about hostile signals necessary to enable the other EW fields to be effective.

36
Q

How are ELINT processes different than ES processes?

A

The purpose of ELINT is to determine enemy capabilities (i.e. future threats); while ES is used tactically and thus time critical.

37
Q

List missions for Electronic Support (ES).

A

Situational Awareness, Radar Warning, Specific Emitter Identification (SEI)

38
Q

Situational Awareness

A

Perception of the surrounding environment, and the ability to anticipate future events.

39
Q

Radar Warning Receiver (RWR)

A

Recieving systems that intercept and analyze hostile radar emissions to determine the type and location of enemy radar controlled weapons that potentially threaten protected assets.

40
Q

Specific Emitter Identification (SEI)

A

Determines not just the type of emitter, but also the specific enemy asset it is attached to. (i.e. shipboard enemy radar)

41
Q

Quiet Range

A

The difference between the radar detection range and the ES reciever range.

42
Q

How does EP differ from EA and ES processes?

A

Does not include subsystems; spectrum of design features of radars and communication systems. (Reduce the effectiveness of jamming)

43
Q

EP techniques are divided into what two categories?

A

Preventive & remedial

44
Q

What do EP techniques involve?

A

Special modulations, antenna design features, phase shifted replicas of jamming signals (cancellation of jamming), special operating modes

45
Q

Decoys

A

Devices designed to look like targets to enemy sensors

46
Q

What are the 3 missions of decoys?

A

Seduction, saturation, and detection

47
Q

Aerosols

A

Tiny solid particles or liquid droplets that remain suspended in the atmosphere for a long time

48
Q

Aerosol Clouds

A

Provide a good reflective surface, bouncing signals back to the victim radar and appearing as strong target returns.

Math!!!! (7 decks)

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