نتایج جستجو برای: field spectroradiometry
تعداد نتایج: 786865 فیلتر نتایج به سال:
Realistic physical and chemical descriptions of the Sun require observations that have been made with spectroradiometrically calibrated telescopes and spectrometers, i.e., with instruments that have a known spectral responsivity. Such calibrations assure that a measured spectral radiance or irradiance is determined on a scale that is defined by the radiometric standards realised and used in lab...
Land use conversion is the main cause for soil degradation, influencing sustainability of agricultural activities in Ecuadorian Andean region. The possibility to identify quality based on spectral properties allows remote sensing methods offer an alternative form monitoring environment. This study used laboratory spectroscopy and multi-spectral images (Sentinel 2) with environmental covariates ...
hyperion hyperspectral data contains a very rich source of information from the earth surface that collects 242 narrow contiguous spectral bands. achieving this source of rich information is subject to the performance of suitable image processing methods on raw satellite data. satellite image processing methods can be classified into two categories of statistical-based and spectral-based. in th...
This paper presents processes and performance for ground-based measurements used by The Boeing Company and RESOURCE21 for vicarious calibration tests of airborne and satellite multispectral and hyperspectral sensors. We highlight our methodology for measuring downwelling irradiance and scene radiance and reflectance from 400 to 2500 nm, and describe in-house enhancements made to commercial spec...
Multispectral reflectance imagery and spectroradiometry can be used to detect stresses affecting crops. Previously, we have shown that changes in spectral reflectance and vegetation indices detected viral infection 14 days before visual symptoms were noticed by the trained eye. Herein we present evidence that shows that the application of multifractal analysis and wavelet transform to spectrora...
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