Digital Number Remote Sensing. The digital number (DN) is the raw output of the sensor that needs to be converted to a physical quantity (eg radiance or reflectance) to allow further processing For this you need to know some things about your sensor.
Sgurung Digital Numbers Reflectance And Atmospheric Correction In Remote Sensing from SGurung – Blogger
Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object in contrast to in situ or onsite observation The term is applied especially to acquiring information about the Earth and other planets Remote sensing is used in numerous fields including geography land surveying and most Earth science disciplines (for.
Remote sensing Wikipedia
of remote sensing data GPS and GIS In this manual an attempt has been made to describe hands on exercises on basics of digital image processing GPS and GIS in an easy and stepbystep which.
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PDF fileSatellite remote sensing with its synoptic view of the earth’s features regular repetitive coverage over large areas and digital mode of data capture offers an effective means of inventorying and updating natural resources information monitoring land use changes and environmental impacts near real time and.
Principles of Remote Sensing Department of Geography
PixelsMultilayer ImageMultispectral ImageHyperspectral ImageSpatial ResolutionSpatial Resolution and Pixel SizeRadiometric ResolutionData VolumeThe intensity valuerepresents the measured physical quantity such as the solar radiance in a given wavelength band reflected from the ground emitted infrared radiation or backscattered radar intensity This value is normally the average value for the whole ground area covered by the pixel The intensity of a pixel is digitised and recorded as a digital number Due to the finite stor.
Sgurung Digital Numbers Reflectance And Atmospheric Correction In Remote Sensing
Difference between intensity value and digital number in
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PDF fileIntroduction To Remote Sensing Glossary Absorptance The ratio of the radiant energy absorbed by a substance to the energy it receives Band The specific wavelength interval in the electromagnetic spectrum Digital image An array of digital numbers (DN) arranged in rows and columns having the property of an intensity value and their locations.
