Anti-Clutter Rain Control: An electronic circuit that suppresses the reflected radar energy from rain and other forms of precipitation to prevent masking of objects that might otherwise be lost in the clutter. Also called ftc (fast time constant).

 

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Anti-Clutter Rain Control: An electronic circuit that suppresses the reflected radar energy from rain and other forms of precipitation to prevent masking of objects that might otherwise be lost in the clutter. Also ca . . . View Full Definition

Radial Drainage: A system of streams running in a radial pattern away from the center of a circular elevation, such as a volcano or dome.

Radar Approach Control Facility (RAPCON): A terminal ATC facility that uses radar and non-radar capabilities to provide approach control services to aircraft arriving, departing, or transiting airspace controlled by the facility. Th . . . View Full Definition

Rain: Precipitation in the form of liquid water droplets greater than 0.5 mm. If widely scattered, the drop size may be smaller. It is reported as 'R' in an observation and on the METAR. The inten . . . View Full Definition

Rain Fade: The loss of signal from the satellite during a heavy rain. This happens more or less to all DBS systems.

Rain Gauge: An instrument used to measure the amount of rain that has fallen. Measurement is done in hundredths of inches (0.01').

Rain Forest: A forest which grows in a region of heavy annual precipitation. There are two major types, tropical and temperate.

Quatrain: A four-line stanza, rhyming, abac or abcb (unbounded, or ballad), as in 'sir patrick spence' and samuel taylor coleridge's 'the ryme of the ancient mariner', aabb (a double couplet), abab (i . . . View Full Definition

Positive Feedback Control: Occurs when information produced by the feedback increases and accelerates the response.

Positive Control: The separation of all air traffic within designated airspace by air traffic control.