Atmospheric correction over the ocean for hyperspectral radiometers using multi-angle polarimetric retrievals

We developed a fast and accurate polynomial based atmospheric correction (POLYAC) algorithm for hyperspectral radiometric measurements, which parameterizes the atmospheric path radiances using aerosol properties retrieved from co-located multi-wavelength multi-angle polarimeter (MAP) measurements. This algorithm has been applied to co-located spectrometer for planetary exploration (SPEX) airborne and research scanning polarimeter (RSP) measurements, where SPEX airborne…

Efficient multi-angle polarimetric inversion of aerosols and ocean color powered by a deep neural network forward model

NASA’s Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, scheduled for launch in the timeframe of 2023, will carry a hyperspectral scanning radiometer named the Ocean Color Instrument (OCI) and two multi-angle polarimeters (MAPs): the UMBC Hyper-Angular Rainbow Polarimeter (HARP2) and the SRON Spectro-Polarimeter for Planetary EXploration one (SPEXone). The MAP measurements contain rich information on…

Polarimetric remote sensing of atmospheric aerosols: Instruments, methodologies, results, and perspectives

Polarimetry is one of the most promising types of remote sensing for improved characterization of atmospheric aerosol. Indeed, aerosol particles constitute a highly variable atmospheric component characterized by a large number of parameters describing particle sizes, morphologies (including shape and internal structure), absorption and scattering properties, amounts, horizontal and vertical distribution, etc. Reliable monitoring of…

SPEX airborne

The SPEX airborne measurement instrument has flown in 2017, 2020 and 2024 during the ACEPOL, SCARBO and PACE-PAX flight campaigns. Aboard a NASA research aircraft, SPEX airborne measures properties of aerosols-fine dust such as soot and ash-from an altitude of 20 kilometres. To do this, it determines the polarisation of sunlight for each colour after…

Bastiaan van Diedenhoven

Clouds Clouds have a large influence on weather and climate, but many processes regarding cloud evolution and formation of precipitation are still poorly understood. At SRON we work on improved remote sensing of cloud properties, such as droplet sizes, droplet concentrations and whether cloud tops consist of liquid droplets or ice crystals. I am particularly…