15:00–15:15 | ABSTRACT 1130
SPATIAL, SPECTRAL AND NOCTURNAL OBSERVATION CAPABILITIES OF A FUTURE SATELLITE MISSION FOR COASTAL AND INLAND AQUATIC ECOSYSTEMS (GALENE)
Coastal and inland aquatic ecosystems are critically important to society, yet they remain among the least studied habitats because there are no satellites specifically designed to observe them at global scale. To address this gap, the GALENE mission concept (Global Assessment of Limnological, Estuarine and Neritic Ecosystems) is proposed to be submitted to future calls of European Space Agency. The mission concept comprises three innovative instruments. A hyperspectral imager covering the 380-1700 nm spectral range with 5-20 nm spectral and 30 m spatial resolutions is complemented with a panchromatic camera with 5 m spatial resolution capable of performing nighttime observations of turbid waters and with a polarimeter with 300 m spatial resolution. We demonstrate the relevance of GALENE’s combined spatial, spectral and nocturnal observational capabilities for synergistic use. The panchromatic camera can enhance spatial resolution while preserving hyperspectral information. We quantify this by applying a convolutional neural network-based fusion method on PRISMA hyperspectral data. We also study the value of GALENE’s 5 m panchromatic and 30 m hyperspectral bands by spatial and spectral resampling of very-high-resolution 8-bands WorldView satellite data. The feasibility of nighttime estimation of suspended matter concentration (SPM) is investigated by analyzing the sensitivity of satellite-measured radiances to SPM for a range of lunar phases and illumination geometries. Simulations of satellite-observed radiances are also analyzed to assess the radiometric (SNR) and spectral sensitivity of GALENE’s hyperspectral sensor for the detection and quantification of phytoplankton functional types and other coastal and inland water quality parameters.
Malik Chami, Observatoire Cote Azur / Sorbonne Université, [email protected], https://orcid.org/0000-0001-7815-0533
Astrid Bracher, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI); Institute of Environmental Physics, [email protected]
Mariano Bresciani, National Research Council (CNR), [email protected]
Xavier Briottet, ONERA, [email protected]
Maycira Costa, University of Victoria, [email protected]
Alexander Damm-Reiser, Department of Geography, University of Zurich, [email protected]
Arnold Dekker, CSIRO, [email protected]
Shungudzemwoyo Garaba, Carl von Ossietzky Universität Oldenburg, [email protected]
Peter Gege, German Aerospace Center (DLR) – Institute of Remote Sensing Technology, [email protected]
Claudia Giardino, National Research Council (CNR), [email protected]
Els Knaeps, VITO, [email protected]
Tiit Kutser, University of Tartu, [email protected]
Stefan Livens, VITO, [email protected]
Richard Lucas, Aberystwyth University, [email protected]
Daniel Odermatt, Eawag, Swiss Federal Institute of Aquatic Science and Technology, [email protected]
Gerard Otter, TNO, [email protected]
Nicole Pinnel, German Aerospace Center (DLR) – Institute of Remote Sensing Technology, [email protected]
Sindy Sterckx, VITO
Marco Celesti, European Space Agency, European Space Research and Technology Centre (ESA-ESTEC), [email protected]
