Search results for "angular measurements"

showing 2 items of 2 documents

Evaluation of different methods to retrieve the hemispherical downwelling irradiance in the thermal infrared region for field measurements

2013

International audience; The thermal infrared hemispherical downwelling irradiance (HDI) emitted by the atmosphere and surrounding elements contributes through reflection to the signal measured over an observed surface by remote sensing. This irradiance must be estimated in order to obtain accurate values of land-surface temperature (LST). There are some fast methods to measure the HDI with a single measurement pointing to the sky at a specified viewing direction, but these methods require completely cloud-free or cloudy skies, and they do not account for the radiative contribution of surrounding elements. Another method is the use of a diffuse reflectance panel (usually, a rough gold-coated…

010504 meteorology & atmospheric sciencesmedia_common.quotation_subject[SDV]Life Sciences [q-bio]0211 other engineering and technologiesIrradiance02 engineering and technologyAtmospheric sciences01 natural sciencesBANDAtmosphereRadiative transferEmissivityElectrical and Electronic EngineeringTEMPERATURE021101 geological & geomatics engineering0105 earth and related environmental sciencesRemote sensingmedia_commonRadiometerMODTRANdiffuse reflectance panelAngular measurementsthermal infrared (TIR)EMISSIVITYSOILShemispherical downwelling radiance13. Climate actionSkyfield measurements[SDE]Environmental SciencesReflection (physics)General Earth and Planetary SciencesEnvironmental science
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The effects of image compression on quantitative measurements of digital panoramic radiographs

2012

WOS: 000314401800026

fractal dimensionPanoramic radiographOdontologíaangular measurementsMandibular first molarFractal dimensionstomatognathic systemClinical and Experimental DentistryRadiography PanoramicHumansGonial angleDigital panoramic radiographyeducationGeneral DentistryMathematicsObserver VariationOrthodonticseducation.field_of_studyRadiography Dental DigitalRepeatabilitycomputer.file_formatData Compression:CIENCIAS MÉDICAS [UNESCO]Ciencias de la saludJPEGimage compressionTagged Image File FormatOtorhinolaryngologyUNESCO::CIENCIAS MÉDICASlinear measurementsResearch-ArticleSurgerycomputerData compressionMedicina Oral Patología Oral y Cirugia Bucal
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