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S

SCINTILLATION

Apparent change in target reflectivity. Motion of the target causes successive radar pulses to bounce off different parts of the target, such as fuselage and wingtip [18].


SCREEN GRID

A grid placed between a control grid and the plate and usually maintained at a fixed positive potential [6].


SCREENING

Process of applying nonconductive or semiconductive materials to a substrate to form thick film components [14].


SEA CLUTTER

Unwanted echoes from the irregular surface of the sea that appear on a radar indicator [18].


SEARCH RADAR SYSTEM

An early-warning device that searches a fixed volume of space [18].

SECAS

SHIP EQUIPMENT CONFIGURATION ACCOUNTING SYSTEM —The Navy system that
keeps track of the configuration of equipment in the fleet [16].


SECOND DETECTOR

The part of the receiver that separates the audio or video component from the modulated intermediate frequency [18].


SECOND-SWEEP ECHOES

See AMBIGUOUS RETURNS [18].

SECONDARY

The output coil of a transformer [2].

SECONDARY CELL

A cell that can be recharged by a current being passed through the cell in a
direction opposite to the discharge current [1].



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