Electronic Warfare Flashcards
What is Electronic Support?
Determine and exploiting tactical use of the EM spectrum (ES)
With ES action is taken to search for, intercept, locate and identify EM energy emissions for the purpose of threat recognition.
What is Electronic Attack?
Reducing and preventing hostile use of the EM spectrum. (EA)
EA are actions taken to prevent or reduce the enemy’s effective use of the EM spectrum.
What is Electronic Protection?
Retaining friendly use of the EM spectrum. (EP)
In terms of EW, what is Emission Control?
EMCON is the control of our emissions to minimize detectability, improve sensor performance (SLA 10) and safety.
What are the different warfare centers?
1) CF Maritime Warfare Center
2) CF Electronic Warfare Center
3) Naval Electronics Warfare Center
What is the range advantage?
The distance at which our ESM can detect a target radar relative to where the target radar can detect us. Generally it is 3:1
What is an omnidirectional antenna?
An antenna that can send and receive signals equally in all directions.
What is a super heterodyne receiver?
A SHR uses filtering, a mixer and a LO to translate the received signal to a lower IF.
What are some advantages and disadvantages of a super heterodyne receiver?
1) High sensitivity and selectivity
2) Slow signal handling due to tuning requirements
3) Low probability of intercept
What is de-interleaving?
Separating individual pulse trains from an interleaved pulse train.
In EW what is seduction?
Seduction is a jamming tactic used to create a fake signal to lure an incoming missile away from the actual target.
In EW what is deception?
Deception uses signals to mislead an enemy. An example is making an enemy missile believe you are in a location that you are not.
What is repeater jamming?
Repeater jamming manipulates received radar energy and retransmits it to change what the enemy radar sees.
What is responsive jamming?
An incident RF is received and the frequency is measured. An oscillator sets the response signal to the incident frequency.
What type of jamming is normally used with MASS?
Range Gate Pull Off
What is passive electronic attack?
Decrease the effectiveness of enemy sensors without the use of EM energy.
What is EA confusion?
Using CHAFF clouds to create a false target for a CW radar to lock up. It is deployed during the search phase.
What is EA distraction?
Distraction is used when a missile is in flight and provides a false target for the missile to lock on.
What is EA seduction?
Seduction is employed to break a missile lock on. It is used with active ESM and CHAFF. It breaks the lock and allows the lock onto another target, usually using Range Gate Pull Off.
What is the purpose of the EW suite?
To provide STJ with electronic support and electronic attack capability.
What is the purpose of Sea Search?
To provide passive electronic support capability for the detection, localization and classification of RF emitters
Explain the sea search antenna assembly.
There is an omnidirectional and a direction finding antenna on the mast. The DF antenna is a feed horn with a rotating reflector. There are two omni antennas covering 2-12 and 8-18 GHZ frequency bands.
Explain the sea search RF Distribution Unit
THE RFDU provides switching between the two antenna groups and a pre-amplifier for the tuner diplexer.
Explain the Sea Search tuner
The tuner is a super heterodyne receiver where initial signal processing occurs. The tuner is where the SLA-10 blanker is interfaced.