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UID:pretalx-foss4g-it-2023-8FQ99D@talks.staging.osgeo.org
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DESCRIPTION:This study provides an overview of main findings achieved by ex
 ploiting the hyperspectral products provided by PRISMA in the visible near
  infrared wavelength range (VNIR)\, for aquatic ecosystems mapping. To thi
 s aim\, the quality of PRISMA L2 products\, distributed by ASI and already
  atmospherically corrected\, is assessed on the basis of corresponding in-
 situ measurements at twenty inland and coastal water sites representing a 
 wider range of optical properties of water. For a subset of sites\, where 
 L2 products showed low accuracies\, the results provided by different atmo
 spheric correction codes (e.g.\, ACOLITE) are added. The results show that
  the PRISMA L2 products are sub-optimal for estimating water quality param
 eters\, apart from very turbid waters or clear-shallow waters\, while ACOL
 ITE would generally be more accurate in reproducing the spectral shape of 
 in-situ hyperspectral data. A series of use cases are then presented to de
 monstrate the performances of a pre-defined series of algorithms (i.e. bio
 -optical modelling inversion\, band-ratios\, machine learning) for derivin
 g bio-physical parameters in optically complex waters from PRISMA.  The re
 trieval of water quality parameters is performed for a variety of water ty
 pes corresponding to lakes of different trophic status\, coastal waters wi
 th significant depth profiles and ecosystems characterized by different hy
 drogeochemical and ecological processes. The presented use cases include t
 he simultaneous retrieval of phytoplankton pigments (e.g.\, concentration 
 of chlorophyll-a and phycocyanin) total suspended matter with separation o
 f organic and inorganic fractions\, yellow substances\, the mapping of fra
 ctional cover of bottom types\, as well as of emergent macrophytes biomass
 . For some of these parameters the synergy of PRISMA with operational mult
 ispectral sensors (e.g.\, Sentinel-2) are presented\, while an outlook for
  advancing the estimation of water quality parameters with PRISMA is final
 ly discussed.
DTSTAMP:20260518T141824Z
LOCATION:Sala Videoconferenza @ PoliBa
SUMMARY:PRISMA\, Launched Four Years Ago: Enabling Scientific Studies on Aq
 uatic Ecosystems - Claudia Giardino
URL:https://talks.staging.osgeo.org/foss4g-it-2023/talk/8FQ99D/
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