final ew ppt
TRANSCRIPT
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ELECTRONIC WARFARE
ByADITYA PV
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INTRODUCTION
Action involving use of the electromagnetic spectrum
Three main divisions :
► Electronic Attack (EA) ► Electronic Protection (EP) ► Electronic Warfare Support (ES)
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ELECTRONIC ATTACK (EA)
Promote Uncertainty Use of active and passive energy to “attack “Four Classes of EA
Jamming Modifiers Radar-absorbing materials (RAM) Physical Destruction
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NON-DESTRUCTIVE EADENIAL:
Overload opposition’s receiver to deny its use by the enemy by JAMMING, CHAFF and FLARES
DECEPTION:
Create false image or change image’s characteristics on a radar display. Misleads or “spoofs” by using repeaters, transponders, chaff-disguise, radar decoys, blip enhancers and radar cross section (RCS) modification
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NOISE JAMMING
Deliberate impairing of enemy’s devices radiation, re-radiation, or reflection of electromagnetic energy
TGT Freq
True Noise
Ideal Jammer
Actual Spot Jammer
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CHAFF CORRIDORS
FLARES (ACTIVE)
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CHAFF FALSE TARGETS
Real Target
MULTIPLE FALSE TARGETS
STROBES COVER PULSE JAMMING
X
“Reactive Jamming”
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DECOYS
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VELOCITY GATE PULL OFF (VGPO)
Target Return
Velocity Gate
Gate Pull-Off
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DESTRUCTIVE EA
Anti-Radiation Missiles SLAM HARM Sidewinder
Directed Energy
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SLAMER(Stand-off Land Attack Missile-
Expanded Response)
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HARM(HIGH-SPEED ANTI RADIATION MISSILE)
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SIDEWINGER
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ELECTRONIC PROTECTION (EP)
Protection of friendly combat capability against undesirable effect of friendly or enemy employed EW
Types Passive EW Active EW
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EPThree ways to defend from enemy EW
Modify radar o Make it more complex o Make it harder to jam
Modify the Medium o Chaffo Torch
Modify the platform
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EP FACTORS
BURNTHROUGH: Increase signal strength to overpower
jammer noise (ECCM)Emission Control (EMCON)
AlphaBravo CharlieDelta
Operator Recognition Training
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JAMMING EFFECTIVENESS
Match the victim radar’s RFBe continuousHave sufficient power
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METHODS TO DEFEAT DIRECT THREAT JAMMING
Frequency Techniques RF Change RF Diversity RF Agility Diplexing
Variable PRF
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ELECTRONIC WARFARE SUPPORT (ES)
Passive surveillance of the EM spectrum ► Detection ► Tracking ► Recognition ► Targeting ► Warning ► Destruction ► Avoidance
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PASSIVE DETECTION RADAR
IFF
TACAN
JAMMING
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ES(PASSIVE SURVEILLANCE)
ELINT : Electronic Intelligence
COMINT : Communications Intelligence
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ES(RECEIVER DESIGN REQUIREMENTS)
Wide spectrum surveillanceWide dynamic rangeUnwanted signal rejectionAngle-of-Arrival measurementSignal Analysis capabilityReal-Time DisplayRecording System
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AN EXAMPLEOF
U.S. SHIP BOARD EWCAPABILITIES
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• SLQ-32 “Sidekick”– On all combatants– Radar warning, detection and jamming– Uses internal library to auto detect/categorize
• Infrared Flares – On all combatants
• Chaff – On all combatants