Read e-book online Hyperspectral Remote Sensing PDF

By Marcus Borengasser, William S. Hungate, Russell Watkins

ISBN-10: 1420012606

ISBN-13: 9781420012606

ISBN-10: 1566706548

ISBN-13: 9781566706544

Land administration concerns, equivalent to mapping tree species, spotting invasive crops, and deciding upon key geologic positive aspects, require an realizing of complicated technical concerns prior to the simplest judgements might be made. Hyperspectral distant sensing is one the applied sciences which could aid with trustworthy detection and identity. offering the basics of distant sensing at an introductory point, Hyperspectral distant Sensing: ideas and functions explores all significant facets of hyperspectral picture acquisition, exploitation, interpretation, and functions. The booklet starts with numerous chapters at the simple techniques and underlying rules of distant sensing photos. It introduces spectral radiometry ideas, similar to radiance, irradiance, flux, and blackbody radiation; covers imaging spectrometers, reading spectral diversity, complete width part greatest (FWHM), answer, sampling, signal-to-noise ratio (SNR), and multispectral and hyperspectral sensor structures; and addresses atmospheric interactions. The e-book then discusses info extraction, with chapters masking the underlying physics rules that result in the production of a picture and the translation of the image's info. the ultimate chapters describe case reviews that illustrate using hyperspectral distant sensing in agriculture, environmental tracking, forestry, and geology.After studying this publication, you might have a greater realizing of ways to judge diverse techniques to hyperspectral analyses and to figure out which techniques will paintings to your purposes.

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Atmospheric conditions such as cloud cover, moisture content, haze, and particulate levels affect illumination by absorbing, scattering, refracting, or reflecting light waves. This can result in obscuring some features or modifying their spectral response as detected by the hyperspectral sensor. Mixing and proximity of surface features affect the ability of the ­ sensor to detect and characterize the features of interest. , dense or sparse). In addition, surrounding features can affect the spectral expression of a ­feature of interest.

The reference spectra are selected from a signature library or the collected ­imagery. The reference spectra or endmembers are then adjusted by subtracting the ­continuum-removed spectra. Then the reference spectra are scaled to match the unknown spectrum. The greater the scale factor, the less correlation there is between the signatures. A statistical analysis of least-squares fit between the curves is then performed, which results in a root means square that can be used to further correlate the statistical significance of the spectral match.

The spatial extents of the area imaged on the ground are a function of the detector size, aircraft height (AGL), focal length of the sensor optics, and internal design considerations. The forward motion of the aircraft, optical distortion effects, and detector integration time, which can cause smear, are the ­primary sources of image geometry complexity. One other consideration is the requirement for detector calibration and normalization of spectral data. A sensor component that is not found in every configuration, but serves a valuable purpose, is some form of downwelling irradiance sensor (DIS).

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Hyperspectral Remote Sensing by Marcus Borengasser, William S. Hungate, Russell Watkins

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