The dependence of reflectance on the wavelength is called a reflectance spectrum or spectral reflectance curve.

Spectral reflectance is the ratio of upwelling to down-welling radiant fluxes for given surface, illumination and observation properties, including the sensor's spectral sampling properties.

These differences in reflectance make it possible to identify different earth surface features or materials by analyzing their spectral reflectance signatures. These signatures are visualized in spectral …

The quantitative measure of the reflectance characteristics of the Earth surface features is the portion of incident energy that is reflected, measured as a function of wavelength; and is called spectral …

Dec 2, 2025 · NIST maintains the national scales for reflectance and transmittance in the ultraviolet, visible, and near-infrared spectral regions (250 nm to 2500 nm). Our primary objective is the …

The spectral reflectance function of a surface specifies the fraction of the illumination reflected by it at each wavelength. Jointly with the illumination spectral density, this function determines the apparent …

Mar 3, 2013 · Note: The various geometrical aspects of reflectance may each be considered restricted to a specific region of the spectrum and may be so designated by the addition of the adjective “spectral.”

This lecture covers the spectral reflectance characteristics of some of the important surface features. Understanding spectral reflectance curves for different features at different wavelengths is essential …

The graph below illustrates the spectral response curves of some common types of objects and ground conditions, and the degree to which the objects reflect energy depending on wavelength.

The graphical representation of the spectral response of an object over different wavelengths of the electromagnetic spectrum is termed as spectral reflectance curve.

Mar 1, 1998 · This document describes the instrumentation, standards, and techniques used to measure spectral reflectance over the ultraviolet, visible, and near infrared wavelength ranges.

Oct 1, 2024 · When working with remote sensing, one key concept to grasp is spectral reflectance. This refers to how different surfaces reflect light across various wavelengths of the electromagnetic …

When the surface being studied is a plane interface between two media of differing optical properties, the reflectance is specular or mirrorlike, and the fraction of light reflected is given by the Fresnel …

The dependence of reflectance on the wavelength is called a reflectance spectrum or spectral reflectance curve.

The spectral reflectance curve of healthy green vegetation has a significant minimum of reflectance in the visible portion of the electromagnetic spectrum resulting from the pigments in plant leaves. …

Spectral reflectance is defined as the ratio of reflected radiation energy to incident radiation energy on an object, varying with wavelength and terrain features, and is directly related to the object's color …

Spectroscopy is a branch of science concerned with the spectra of electromagnetic radiation as a function of its wavelength or frequency, as measured by spectrographic equipment and other …

Spectral reflectance specifically looks at the light that bounces back. It can vary depending on the type of light (like visible or infrared) and the material's properties. For example, a shiny car might reflect …

Reflectance spectra are defined as the spectral characteristics of light reflected from a surface, which are influenced by factors such as the polarization and angle of incidence of the incident radiation, as …

Spectral reflectance is defined as the reflectance measured at a specific temperature and wavelength within a small wavelength interval, and it can be specular, diffuse, or hemispherical. It is indicated …

Spectral reflectance is the ratio of reflected energy to incident radiation (ɸ r /ɸ) as a function of the wavelength. The spectral reflectance characteristics of most targets depend upon the illuminating …