EM Theory Flashcards
What type of radar scan is used for precise target tracking?
Conical (conscan) radar
This radar scan uses a thin beam to cover a rectangular area w/ a horizontal sweep
Raster Scan
_____ are either passive or active.
Electronic Scan Array (ESA)
In a _____ radar, a single high-power transmitter creates the radar signal, and transmits it through the antenna.
Passive ESA
In an ____ radar, there are many low power transmit/receive modules that form the radar beam.
Active ESA
The ___ radar uses a vertical scan and mechanically nods to pick up the target
Height Finder
What are the 3 types of noise jamming?
Barrage
Spot
Swept Spot
_____ are wide- band noise transmitters that deny the use of frequencies over wide portions of the EM spectrum.
Barrage
The ____ is the AFs primary SEAD asset. It is equipped w/ the _____.
F-16 CJ, AGM-88(HARM) and HTS pod
EC-130H Compass Call is an airborne:
Comm jammer used to decrease effectiveness of enemy C3. Secondary EA capability.
AGC- Auto again Control counters:
Chaff, clutter, and most types of jamming
_____ counters a receding target that’s dispensing chaff.
Lead edge tracking
____ occurs when the power in the reflected target signal exceeds the power in the jamming signal.
Burn Through
What is a built in radar EP feature that protects as enemy radar gets closer?
Burn Through
IR radiation is subdivided into 3 parts:
Near
Midwave
Far
What is thermal contrast?
The IR contrast between the background and the target
Positive contrast is when:
The target has more IR energy than it’s contrasting background
Negative contrast is when:
The target has less IR energy then it’s contrasting background
Delta T is:
The temperature difference between a target and it’s background
What is thermal crossover?
Periods during the day that are transitional between surface heating and cooling. Normally occurs near sunrise and sunset.
What is transmission?
The passing of light through either a transparent or translucent medium.
_____ is the bending of a light ray. As light passes from one medium or one density to another, it’s speed is altered.
Refraction
_____ is when light passes over the edge of an opaque object and scatters
Diffraction
Diffraction can be A helpful aid in imagery analysis because it allows_____.
Us to view inside open hangers, vehicle storage sheds, or other shadowed areas to observe activity
What is the first step in accurately assessing the function and production capacity of an industrial complex?
Identify its components using SAR imagery.
What is the most apparent feature of industrial facilities?
The concentration of L shaped returns.
