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Evaluation of PRISMA products over snow in the Alps and Antarctica
  • +12
  • Biagio Di Mauro,
  • Sergio Cogliati,
  • Niklas Bohn,
  • Giacomo Traversa,
  • Roberto Garzonio,
  • Giulia Tagliabue,
  • Gabriele Bramati,
  • Edoardo Cremonese,
  • Tommaso Julitta,
  • Luis Guanter,
  • Alexander Kokhanovsky,
  • Claudia Giardino,
  • Cinzia Panigada,
  • Micol Rossini,
  • Roberto Colombo
Biagio Di Mauro
Institute of Polar Sciences - National Research Council of Italy

Corresponding Author:[email protected]

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Sergio Cogliati
University of Milano-Bicocca
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Niklas Bohn
Jet Propulsion Laboratory, California Institute of Technology
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Giacomo Traversa
Institute of Polar Sciences - National Research Council of Italy
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Roberto Garzonio
University of Milano-Bicocca, Earth and Environmental Sciences Department
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Giulia Tagliabue
University of Milano - Bicocca
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Gabriele Bramati
Remote Sensing Laboratories, University of Zurich
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Edoardo Cremonese
CIMA Research Foundation
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Tommaso Julitta
JB Hyperspectral Devices
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Luis Guanter
University of Valencia
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Alexander Kokhanovsky
German Research Centre for Geosciences
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Claudia Giardino
CNR
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Cinzia Panigada
Università degli Studi Milano-Bicocca
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Micol Rossini
Università degli Studi Milano-Bicocca
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Roberto Colombo
University of Milano-Bicocca
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Abstract

PRISMA is a hyperspectral satellite mission launched by the Italian Space Agency (ASI) in April 2019. The mission is designed to collect data at global scale for a variety of applications, including those related to the cryosphere. This study presents an evaluation of PRISMA Level 1 (L1) and Level 2 (L2D) products for different snow conditions. To the aim, PRISMA data were collected at three sites: two in the Western European Alps (Torgnon and Plateau Rosa) and one in East Antarctica (Nansen Ice Shelf). PRISMA data were acquired contemporary to both field measurements and Sentinel-2 data. Simulated Top of the Atmosphere (TOA) radiance data were then compared to L1 PRISMA and Sentinel-2 TOA radiance. Bottom Of Atmosphere (BOA) reflectance from PRISMA L2D and Sentinel-2 L2A data were then evaluated by direct comparison with field data.
Both TOA radiance and BOA reflectance PRISMA products were generally in good agreement with field data, showing a Mean Absolute Difference (MAD) lower than 5%. L1 PRISMA TOA radiance products resulted in higher MAD for the site of Torgnon, which features the highest topographic complexity within the investigated areas. In Plateau Rosa we obtained the best comparison between PRISMA L2D reflectance data and in situ measurements, with MAD values lower than 5 % for the 400-900nm range. The Nansen Ice Shelf instead resulted in MAD values <10% between PRISMA L2D and field data, while Sentinel-2 BOA reflectance showed higher values than other data sources.
23 Dec 2023Submitted to ESS Open Archive
27 Dec 2023Published in ESS Open Archive