Remote sensing

Remote sensing

The process of using aerial sensor technologies to detect and classify objects on Earth both on the surface, and in the atmosphere and oceans by means of propagated signals.

Industry: Earth science

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Remote sensing

Slant-range distortion

Earth science; Remote sensing

Geometric distortion of a slant-range image.

amplitude

Earth science; Remote sensing

For waves, the vertical distance from crest to trough.

look direction

Earth science; Remote sensing

Direction in which pulses of microwave energy are transmitted by a radar system. The look direction is normal to the azimuth direction. Also called range direction.

emittance

Earth science; Remote sensing

A term for the radiant flux of energy per unit area emitted by a body.

color composite image

Earth science; Remote sensing

Color image prepared by projecting individual black-and-white multispectral images, each through a different color filter. When the projected images are superposed, a color composite image results.

depression angle (y)

Earth science; Remote sensing

In radar, the angle between the imaginary horizontal plane passing through the antenna and the line connecting the antenna and the target.

line-pair

Earth science; Remote sensing

Pair of light and dark bars of equal widths. The number of such line-pairs aligned side by side that can be distinguished per unit distance expresses the resolving power of an imaging system.