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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.

Contributors in Remote sensing

Remote sensing

digital number (DN)

Earth science; Remote sensing

Value assigned to a pixel in a digital image.


Earth science; Remote sensing

The scientific study of earthquakes, including their causes and effects is called as seismology in Earth science.


Earth science; Remote sensing

An instrument that detects and records vibrations and movements in the Earth during an earthquake.


Earth science; Remote sensing

The period of time that it takes for a planet to spin around once, completing one rotation on its axis.


Earth science; Remote sensing

The point on Earth's surface that is directly above the place where an earthquake first starts.

ASA index

Earth science; Remote sensing

Index of the American Standards Association designating film speed, or sensitivity to light. Higher values indicate higher sensitivity. The ASA index has been replaced by the ISO index.

Raster format

Earth science; Remote sensing

A means of representing spatial data in the from of a grid of DN, each line of which can be used to modulate the lines of a video raster.

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