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GRASP is a highly accurate aerosol retrieval algorithm that processes properties of aerosol- and land-surface-reflectance. It infers nearly 50 aerosol and surface parameters including particle size distribution, the spectral index of refraction, the degree of sphericity and absorption. The algorithm is designed for the enhanced characterization of aerosol properties from spectral, multiangular polarimetric remote sensing observations. GRASP works under different conditions, including bright surfaces such as deserts, where the reflectance overwhelms the signal of aerosols. GRASP is highly versatile and allows input from a wide variety of satellite and surface measurements.

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GRASP OPEN
GraspOpenGRASP OPEN@GraspOpen·
28 Oct

New release of POLDER processing, this time using "models" approach. It is recommend to use it for AOD products because of no bias at low value (AOD<0.2).

Credit: CNES/GRASP/LOA/Catalysts/ICARE

https://t.co/7XTCgYgPfN

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GraspOpenGRASP OPEN@GraspOpen·
23 Sep

Good news! The PARASOL archive was reprocessed again thanks to the collaboration of @CNES, @CNRS, LOA, ICARE and @GraspSas. New products are now available at: https://t.co/7XTCgYgPfN

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GraspOpenGRASP OPEN@GraspOpen·
27 May

41 students have come today to GRASP-ACE Summer school and the world-recognized teachers from France, Spain, USA, Germany and Russia are now here in Granada to share their experience. A lot of hard work to do but we are strong and optimistic!

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GRASP Code

Download the GRASP-code, install it and run it for a large number of different aerosol measurements. Signup for the latest version of GRASP-code: stable, fast and easy to use.

Code Documentation

Complete documentation about the code, API and features of GRASP.

GRASP is a highly accurate aerosol retrieval algorithm.

It processes properties of aerosol and land surface reflectance.

What is the GRASP Algorithm?

GRASP (Generalized Retrieval of Aerosol and Surface Properties) is the first unified algorithm to be developed for characterizing atmospheric properties gathered from a variety of remote sensing observations
(Dubovik, O. et al., 2014, GRASP: a versatile algorithm for characterizing the atmosphere, SPIE Newsroom. DOI: 10.1117/2.1201408.005558, doi: http://spie.org/x109993.xml)

What are Aerosols?

What are the sources of aerosols and what effects do they have?

Interested in GRASP Algorithm

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