Radar Ops and Capes OS "A"
Unidirectional
Allows a pencil beam to search a 360 degrees pattern in a clockwise direction.
Azimuth
Angular measurement in the horizontal plane in a clockwise direction
EMI
Causes electronic equipment to malfunction or produce impossible operating conditions.
Jamming
Deliberate interference by an enemy that can render a radar system useless.
EMCON
Denies useful intelligence and combat informations to enemies who passively intercept.
Range
Distance between any given point and an object or target.
Conical
Employs a pencil beam of RADAR that is continuously rotated around the target generating a cone-shaped scan pattern with the apex of the cone located at the antenna.
Amplitude
Height of a wave
Short Pulse
Navigation and close range
Linear
Offers excellent single-axis coverage and the narrow beam offers enhanced azimuth and elevation resolution.
Long Pulse
Open Sea and longer ranges.
Cycle
Positive, Negative, Middle
Circular
Provides accurate target range and azimuth information.
Refraction
RF energy that is bent when waves pass from one material to another in a different density.
Attenulation
Reduction in RF wave strength due to the scattering or absorption of waves into the atmosphere.
Man-Made EMI
Results from ratio transmissions or electronic fields generated by electronic equipment.
True Bearing
The angle between TN and a line pointed directly at the target.
Diffraction
The bending of a wave as it moves around an obstacle or passes through a narrow opening
Bearing
The direction from which the reflected signal is received.
Wavelength
The space occupied by one cycle.
Pulse Width
The time it takes radar to transmit a signal
Ducting
The trapping of RF waves in 2 layers of the atmosphere
Raster
Uses a thin bean to cover a rectangular area by horizontally sweeping the areas, both horizontally and vertically.
Track-While-Scan
Uses two or more distant RADAR beams to track one or more targets while scanning for others.
Frequency Diversity
creates a constant variation on jumping of frequencies over the entire applicable portion of electromagnetic spectrum
Frequency Agility
creates random and automatic jumping of frequencies in specific operating bands and randomly changes the transmitter's carrier frequency between pulses
Heavy Rain
maximum FTC
rough
maximum STC
Radar Cross Section
measure of a target's ability to reflect radar signals back to the receiver. Size, shape and angle will affect RCS
Light Rain
minimum FTC
calm
minimum STC
Natural EMI
phenomena such as thunderstorms, electrical storms, or solar and interstellar radiation
STC
used to reduce effects of near-range clutter, sea returns and chaff/clutter.
