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

Ringing

Earth science; Remote sensing

Fringe-like artefacts produced at edges by some forms of spatial-frequency filtering.

Context

Earth science; Remote sensing

The known environment of a particular feature on an image.

Synthetic-aperture radar (SAR)

Earth science; Remote sensing

Radar system in which high azimuth resolution is achieved by storing and processing data on the Doppler shift of multiple return pulses in such a way as to give the effect of a much longer antenna.

Doppler shift

Earth science; Remote sensing

A change in the observed frequency of EM or other waves caused by the relative motion between source and detector. Used principally in the generation of synthetic-aperture radar images.

Describes a radar pulse in which the polarisation of the return is the same as that of the transmission. Parallel-polarized images may be HH (horizontal transmit, horizontal return) or VV (vertical ...