AIRBORNE EW
Dec 01, 2015
INTRODUCTION• WHAT IS EW?– MIL ACTION INVOLVING THE USE OF EM
ENERGY TO• DETERMINE• EXPLOIT• REDUCE• PREVENT HOSTILE USE OF• RETAIN FRIENDLY USE OF
THE EM SPECTRUM
ELECTRONIC WARFARE
ELECTRONIC SP MEASURE(ESM)
(ECM)ELECTRONIC COUNTER MEASURE
ELECTRONIC COUNTER COUNTER MEASURE(ECCM)
ESM• ELECTRONICS SP MEASURES (ESM)
– SEARCH– INTERCEPT – LOC RADIATED EM ENERGY FOR OWN EXPL– RECORD– ANALYSE
• ESM PROVIDES EW INFO FOR ECM & ECCM– SIGINT
• ELINT• COMINT
– WARNING – RWR, LWR, MWR, ETC– HOMING – WPN LOC RDR, ETC
• INFO PROVIDED BY ESM RECEIVERFREQ OF OP PRF PW ANTENNA SCAN RATEDIRN/ LOC TYPE OF MODULATION EOB FREQ IN USECALL SIGNS LOC OF UNITS
ESM PLATFORMS• DESIRED CHARACTERISTICS OF ESM PLATFORM– HT OF ESM RXR– CONTINUITY OF OP– FLEXIBILITY– RELIABILITY– ACCURACY– ECONOMY – EASE OF MAINT
• TYPES OF ESM PLATFORMS– GRND BASED – SHIP BORNE– SUBMARINE– AEROSTAT BASED– AIRBORNE– SATELLITE BASED
INTRODUCTION
• WHY ECM REQD?– SPEED, ACCURACY, STEALTH & LETHALITY OF MSLS &
GUNS HAVE INCREASED EXPONENTIALLY– HIGH SPEED DETECTION, ANALYSIS OF SIGNATURE,
TRACKING AND COUTER MEASURES HAVE BECOME IMPERATIVE FOR SURVIVAL
ECM
CONFUSION DECEPTION
ACTIVE PASSIVE ACTIVE PASSIVE
•SPOT JAMMING•BARRAGE JAMMING•SWEEP THROUGH JAMMING•SMART NOISE
•CHAFF •REPEATER•SYNTHESISED
•DECOYS•IR FLARES•CORNER REFLECTORS•STEALTH•DRONES/RPVs/UAVs
HARDKILL
EMP
NOISE JAMMING
• THE DELIBERATE RADIATION OR REFLECTION OF
EM ENERGY WITH THE OBJECT OF IMPAIRING THE
USE OF ELECTRONIC SYSTEM, EQPT, DEVICE OF
THE ADVERSARY
DECEPTION JAMMING
THE DELIBERATE RADIATION, ALTERATION OR
REFLECTION OF EM ENERGY IN A MANNER
INTENDED TO MISLEAD THE USE OF ELECTRONIC
DEVICES, SYSTEMS OR EQPT BY THE ADVERSARY
SPOT JAMMER
JAM
MIN
G P
WR
FREQFO
• Continuous.
• High power.
• Requires knowledge of victim rdr freq.
• Inability to counter freq agile rdrs.
• One jammer per victim.
BARRAGE JAMMER
JAM
MIN
G P
OW
ER
FREQUENCY
FO
• Continuous.
• Low power.
• Requires knowledge of victim approx rdr freq rg.
• Inability to counter freq agile rdrs.
• One jammer for many victims.
F1 F2 F3
• Not continuous.
• High power.
• Precise freq of victim rdr not essential.
• One jammer for many victims.
SWEEP JAMMER
JAM
MIN
G P
OW
ER
FOFREQUENCY
F1 F2 F3
PASSIVE ECM• CHAFF. • IR FLARES.• DECOYS.
• CHAFF LOOKS LIKE MILLIONS OF TINY STRANDS OF ALUMINUM FOIL AND EACH STRIP IS CUT TO LENGTH TO MATCH THE VARIOUS WAVELENGTHS OF THE RADAR. USING CHAFF TO COMBAT RADAR WAS USED AS EARLY AS WWII AND STILL PROVES VERY EFFECTIVE AGAINST NEARLY ALL RADAR THREATS. • FLARES ARE WHITE HOT MAGNESIUM THAT ARE DESIGNED TO DEFEAT A MISSILE'S INFRA-RED (IR) TRACKING MECHANISMS.
CHAFF
• GLASS SILICATE FIBRES WITH ‘AL’ FOILS/STRIPS COATING.
• RADAR OUTPUT AMPLIFIED AND REFLECTED TO PRODUCE
SPURIOUS TARGET ECHOES. IT PROVIDES A MORE ATTRACTIVE TARGET TO THE RADAR.
• FOR CHAFF TO BE EFFECTIVE, IT SHOULD BE A BETTER
TARGET THAN AC, BY PROVIDING MORE RCS THAN AC’S RCS
• AFTER THE CHAFF IS EJECTED FROM THE AC AND INTO THE AC
SLIPSTREAM, THE CHAFF PACKAGES BURST OPEN AND THE
FIBERS SCATTER TO FORM A RADAR-REFLECTIVE CLOUD CALLED
A CHAFF CORRIDOR. EACH CHAFF PACKAGE IS DESIGNED TO
SIMULATE AN AC. SEVERAL AC CAN CREATE A CHAFF CURTAIN,
CONSISTING OF THOUSANDS OF FALSE TARGETS, WHICH
CONFUSE THE RADAR GUIDANCE PACKAGE ON A MISSILE SO
THEY ARE UNABLE TO LOCATE THE REAL TARGETS WITHIN THE
CHAFF CLOUD.
FLARE• HEAT SOURCES DEPLOYED IN THE ATMOSPHERE TO CONFUSE
THE HEAT SEEKING MISSILES.• GENERALLY MADE UP OF MAGNESIUM TEFLON PELLET
CONTAINED IN IR FLARE CARTRIDGE.• A DISPENSE SIG WILL FIRE EXPLOSIVE SQUIB IN CARTRIDGE
AND EJECT THE IGNITED PELLET IN THE SLIPSTREAM. WHICH
ON BURNING GIVES POWERFUL IR SOURCE ( DURATION
SEVERAL SECONDS) TO HEAT SEEKING WEAPON
• TYPES•DECOY FLARES•GROUND ILLUMINATION FLARES
SQUIBSQUIBFlareFlareCartridgeCartridge
Missile FOV
Power Centroid of Aircraft and Flare
Missile Seeker Seduction from Aircraft by FlareMissile Seeker Seduction from Aircraft by Flare
DECOY• SMALL AIRCRAFT LIKE VECHILE MADE TO APPEAR TO THE RADAR OF SAME RCS AS THAT OF AIRCRAFT
• DECOYS LURE THE INCOMING MISSILE BY PRESENTING A MORE ATTRACTIVE TARGET.
STEALTH TECHNOLOGY
• A VARIETY OF TECHNOLOGY COMBINED TO MAKE AC ‘DISAPPEAR’
• VARIOUS TECHNIQUES• THERMAL SIGNATURE REDUCTION.• EMISSION CONTROL.• CAMOUFLAGE.• NOISE SUPPRESSION.• RADAR CROSS SECTION REDUCTION. • ELIMINATION OF SMOKE TRAIL.
INTRODUCTION
• WHAT IS ECCM REQD?– ACTIONS TAKEN TO ENSURE FRIENDLY
USE OF EM SPECTRUM DESPITE ENEMY’S USE OF EW
ECCM
ANTI ESM ANTI ECM
EEP EES OPERATIONALMEASURES
TECHMEASURES
TRGMEASURES
RXR RELATEDECCM
TXR RELATEDECCM
ANTENNA RELATEDECCM
DETECT ENEMY ESM ACTIVITY BY
• JUDICIAL IMPOSITION OF ELECTRONICEMISSION POLICY (EEP)
• MEASURES INVOLVING ELECTRONICEMISSION SECURITY (EES)
EEP• ELECTRONIC EMISSION POLICY (EEP) IS A COMMANDFUNCTION.
• IT LAYS DOWN RESTRICTIONS ON THE USE OFELECTRONIC SYSTEMS OF
OPERATIONS.
• IT IS EVOLVED AT THE FIELD FORCE LEVEL AND IS CONVEYED TO THE
LOWER FORMATIONS THROUGH OPERATIONAL ORDERS AND
INSTRUCTIONS
• EEP IS THE POLICY WHICH LAYS DOWN DEGREE OF FREEDOM ALLOWED
IN THE USE OF ELECTRONIC SYSTEMS TO COUNTER ENEMY’S
CAPABILITY TO DETECT, IDENTIFY AND LOCATE OWN EMITTERS FOR
EXPLOITATION BY HOSTILE ACTION AND EXERCISE CONTROL OVER
OWN EMISSIONS TO MINIMIZE ELECTRO-MAGNETIC INTERFERENCE
PURPOSE OF EEP
• IT REDUCES THE REACTION TIME AVAILABLE TO THE ENEMY ESM ORGANIZATION
• TO ACQUIRE INTELLIGENCE• STUDY THE TECHNICAL PARAMETERS OF OUR
ELECTRONIC SYSTEMS.• IT DENIES INTELLIGENCE THAT MAY BE
GAINED BY THE ENEMY THROUGH INTERCEPTION.
• IT ENABLES A BETTER CONTROL ON ALL EMISSIONS
ELECTRONIC EMISSION SECURITY(EES)
• ONCE THE EMISSION POLICY HAS BEEN DECIDED MEASURES ARE TAKEN
TO ENSURE THAT THE ENEMY’S ESM ORGANIZATION GETS THE LEAST
POSSIBLE INFORMATION FROM OWN ELECTROMAGNETIC
TRANSMISSIONS. THIS IS KNOWN AS EES.
• THE BASIC CONSIDERATIONS FOR EES ARE :-
• (A) THE DIRECTION OF TRANSMISSION.
• (B) THE FREQUENCIES OF TRANSMISSION.
• (C) SECURITY OF TYPES OF EMITTERS AND CHARACTERISTICSOF
ELECTRONIC SYSTEMS.
• (D) OBSERVANCE OF SECURITY RULES AND SAFETYMEASURES.