Contents
What is relative spectral response?
Relative Spectral Response is the short-circuit current density generated by unit of irradiance at a particular wavelength as a function of wavelength. A cell with known spectral response can be used as reference, replacing the irradiance sensor [1].
What is the spectral response function?
The spectral response describes the sensitivity of the photosensor to optical radiation of different wavelengths. A simple multiplying factor can be applied to the photosensor signal to make it correspond to the light level.
What is spectral band in remote sensing?
A spectral band is a matrix of points defined by three dimensions, its coordinates and the intensity relating to the radiance. From: Optical Remote Sensing of Land Surface, 2016.
What is a spectral channel?
Each channel is sensitive to radiation within a narrow wavelength band. The resulting image is a multilayer image which contains both the brightness and spectral (colour) information of the targets being observed.
What determines spectral sensitivity?
Spectral sensitivity of eye is influenced by light intensity. And the light intensity determines the level of activity of cones cell and rod cell. And it can be determine the main characteristic of human vision.
What is a spectral response curve?
Spectral Response Patterns. The magnitude of energy that an object reflects or emits across a range of wavelengths is called its spectral response pattern. The graph below illustrates the spectral response patterns of water, brownish gray soil, and grass between about 0.3 and 6.0 micrometers.
Which spectral bands are commonly used in remote sensing?
1 Coastal Aerosol (0.43-0.45µm)
What is the spectral resolution of a dataset with more than one band?
The spectral resolution of a dataset that has more than one band, refers to the spectral width of each band in the dataset. In the image above, a band was defined as spanning 800-810 nm. The spectral width or spectral resolution of the band is thus 10 nm.
How many bands of multispectral imagery are there?
About NAIP Multispectral Imagery. NAIP imagery is available in the United States and typically has three bands – red, green and blue. However, sometimes, there is a 4th near-infrared band available. NAIP imagery typically is 1m spatial resolution, meaning that each pixel represents 1 meter on the Earth’s surface.
How big is the swath of MODIS telescope?
Swath Dimensions: 2330 km (cross track) by 10 km (along track at nadir) Telescope: 17.78 cm diam. off-axis, afocal (collimated), with intermediate field stop
How big is the orbit of MODIS in km?
Orbit: 705 km, 10:30 a.m. descending node (Terra) or 1:30 p.m. ascending node (Aqua), sun-synchronous, near-polar, circular Scan Rate: 20.3 rpm, cross track Swath Dimensions: 2330 km (cross track) by 10 km (along track at nadir) Telescope: 17.78 cm diam. off-axis, afocal (collimated), with intermediate field stop