IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
First Results From WATERHYPERNET - a Network of Hyperspectral Radiometers for Multi-satellite Water Reflectance Validation adapted to Sentinel-2ABCD
Autor/es:
DOGLIOTTI, A.I.; RUDDICK, K.
Reunión:
Encuentro; 3rd Sentnel-2 Validation Team Meeting; 2019
Resumen:
A network of hyperspectral radiometers is beingdeveloped for radiometric validation of satellitemissions. This network follows closely the AERONET-OCfederation concept [Zibordi et al, 2009] but uses theTRIOS/RAMSES hyperspectral radiometer and a moreextensive multi-look pointing scenario. The instrumentsystem consists of one radiance and one irradiancesensor on a pointing robot, controlled by amicroprocessor and supplemented with GPS,inclinometer and video camera data feeds. Themeasurement protocol is based on the abovewatermethod of [Mobley, 1999 and 2015], but includesadditional scenarios for different viewing zenith andazimuth configurations. The system is being deployedinitially in Belgian coastal and inland waters, then atsites in Argentina and France before full internationalexpansion. The network will provide water reflectancedata for the radiometric validation of all visible and near infrared bands of all optical missions, includingSentinel-2A&B, Sentinel-3A&B, PROBA-V, MODISAQUA&TERRA,VIIRS, Landsat-8, Pléiades, CHRISPROBA,MSG-SEVIRI, PlanetDove ? PRISMA, ENMAP,PACE, MTG and ... any future optical missions, includingnanosatellites. This presentation will provide resultsfrom prototype testing on Aqua Alta OceanographicTower in July 2018, including a comparison with aconventional manually-operated TRIOS/RAMSESsystem  and the automated AERONET-OC data from thissite. The specific application to validation of the wideand asymmetric bands of Sentinel-2A and -2B will bedescribed. Research in progress on the abovewatermeasurement protocol and the operational plan forcharacterisation of all radiometers will also be outlined.