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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 ·

12 Dec

We are so proud to share with you the publication of a paper in the @Nature journal about the use of #MultiAngularPolarimeters (MAP) to estimate global #aerosol absorption optical depth (AAOD) and its effect:
https://www.nature.com/articles/s41467-022-35147-y?utm_campaign=related_content&utm_source=EARTHENV&utm_medium=communities
Thanks to @RechercheUlille and @LOA_labo.

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GRASP OPEN @graspopen ·

27 Oct

We are very pleased to announce the publication of a new paper about dynamic error estimates of the #aerosol retrieval properties by using the #GRASP algorithm:

https://amt.copernicus.org/articles/15/6075/2022/

#CorrelationMatrix #GroundBased #EarthObservation #RemoteSensing

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GRASP SAS @graspsas ·

25 Oct

#Spacenews has recently reported about #Grasp's new venture: the acquisition of #AirPhoton, which marked the genesis of Grasp Global and a brighter future full of possibilities!

You can read the news at: https://spacenews.com/introducing-grasp-global

#remotesensing #earthobservation #futureisnow

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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)