Remote Sensing Glossary

Revision as of 16:34, 10 December 2012

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A

Atmospheric correction

A pre-processing step for satellite imagery to remove atmospheric effects in order to enhance accuracy of surface reflectance.

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Pixel

The smallest spatial unit in a digital image. A satellite image is made up of a matrix pixels, each having its own vector of digital values for each band.

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Radiometric resolution

Sensitivity (maximum range of values) of the sensor in detecting different intensities of electromagnetic radiation in single spectral bands. Typically recorded in 6 bit, 7 bit, 8 bit, 10 bit or 16 bit format. The contrast of a raster image is depending on radiometric resolution.

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Spatial resolution

The size of a pixel (corresponding ground area that is covered by a pixel) that is recorded in a raster image – typically pixels correspond to square areas.

Spectral resolution

Number and wavelength width of the single spectral bands recorded by a Category:Sensors and platforms.

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