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

modulate

Earth science; Remote sensing

To vary the frequency, phase, or amplitude of electromagnetic waves.

Greenwich mean time (GMT)

Earth science; Remote sensing

This international 24-h system is used to designate the time at which Landsat images are acquired.

large format camera (LFC)

Earth science; Remote sensing

An experiment first carried on the Space Shuttle in October 1984.

data collection system (DCS)

Earth science; Remote sensing

On Landsats 1 and 2, the system that acquired information from seismometers, flood gauges, and other measuring devices. These data were relayed to ground receiving stations.

acuity

Earth science; Remote sensing

A measure of human ability to perceive spatial variations in a scene. It varies with the spatial frequency, shape, and contrast of the variations, and depends on whether the scene is colored or ...