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What is QUick Atmospheric Correction?
The quick atmospheric correction (QUAC) code performs atmospheric correction on multi- and hyperspectral imagery spanning all or part of the visible and near infrared-short wave infrared spectral range, ∼ 400−2500 nm.
How do you use QUAC?
Using QUAC. From the Toolbox, select Radiometric Correction > Atmospheric Correction Module > QUick Atmospheric Correction (QUAC). The QUick Atmospheric Correction Input File dialog appears. Select an input raster, perform optional spatial and spectral subsetting and/or masking, then click OK.
What is quick atmospheric correction ( Quac ) used for?
QUick Atmospheric Correction (QUAC) QUAC is an atmospheric correction method for multispectral and hyperspectral imagery that works with the visible and near-infrared through shortwave infrared (VNIR-SWIR) wavelength range. See Background on QUAC for more information on its scientific application.
How does IAR correction work for geospatial data?
Use IAR Reflectance Correction (Internal Average Relative Reflectance) to normalize images to a scene-average spectrum. This is particularly effective for reducing hyperspectral data to relative reflectance in an area where no ground measurements exist and little is known about the scene. It works best for arid areas with no vegetation.
How to do quick atmospheric correction ( Quac ) in Photoshop?
From the Toolbox, select Radiometric Correction > Atmospheric Correction Module > QUick Atmospheric Correction (QUAC). The QUick Atmospheric Correction Input File dialog appears. Select an input raster, perform optional spatial and spectral subsetting and/or masking, then click OK.
When to use Quac in a water scene?
Input files must have at least three bands and valid wavelengths. QUAC works best with scenes that contain diverse materials such as water, soil, vegetation, and man-made structures. QUAC should not be used with scenes over oceans or large water bodies.