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Photonics Dictionary

Atmospheric Correction Now

The Atmospheric Correction Now software (ACORN) is a tool used in remote sensing and satellite imagery processing. Its primary function is to correct satellite imagery for atmospheric effects that can distort or obscure the true appearance of the Earth's surface as seen from space.

Here are some key aspects typically addressed by atmospheric correction software like ACORN:

Atmospheric scattering and absorption: It accounts for how the atmosphere scatters and absorbs light at different wavelengths, affecting the intensity and color of the light captured by the satellite sensor.

Radiative transfer models: ACORN uses sophisticated radiative transfer models to simulate how light interacts with the atmosphere, considering factors such as aerosols, gases, and other atmospheric constituents.

Surface reflectance retrieval: By applying atmospheric correction algorithms, ACORN retrieves the surface reflectance values from satellite imagery. This corrected reflectance data provides a clearer representation of surface properties, such as vegetation health, land cover types, and environmental changes.

Application in remote sensing: It is widely used in various remote sensing applications, including environmental monitoring, agriculture, urban planning, and disaster management. Corrected satellite imagery allows for more accurate analysis and interpretation of Earth's surface features and conditions.

ACORN and similar atmospheric correction software (such as ATCOR, FLAASH, and HATCH) play a crucial role in ensuring the accuracy and reliability of satellite-based observations, enabling researchers, scientists, and policymakers to make informed decisions based on precise environmental data.

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