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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 @GraspOpen·

Usually scientific papers are not simple for broad audience but it doesn't mean they cant make noise in press! Check out this article from AAAS summarizing the discussion of a paper where GRASP results led to interesting conclusions: https://www.aaas.org/news/popular-climate-models-may-underestimate-effects-smoke-plumes-over-southeast-atlantic

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GRASP OPEN @GraspOpen·

10 Sep

GRASP v1.1.1 is out! Please, update your installation and do not forget to read the CHANGELOG if you want to know more about this new version.

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GRASP SAS @GraspSas·

1 Sep

Finally @ESA MOOC Chapter "Impact of COVID-19 measures on Atmospheric Composition" is out: https://www.imperativemoocs.com/courses/atmosphere-covid19-impact
We are proud to take part in it creation and to show our results in Topic D - Changes in Aerosols 🌏
Many thanks to our partners and lecturers!

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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)