POSTER Session 1

A network (WATERHYPERNET) of automated hyperspectral radiometers has been set up to provide water reflectance measurements in the visible and near-infrared bands for the purpose of multi-mission satellite validation. The PANTHYR (Pan-and-Tilt Hyperspectral Radiometer) system discussed here, one of the two autonomous systems in the WATERHYPERNET project, consists of two TriOS RAMSES hyperspectral radiometers (one radiance and one irradiance) making measurements over a range of azimuth and zenith angles, using a sun-tracking instrument pointing package. Data is transmitted to shore daily, then processed and web-distributed automatically in near-real time for integration in satellite mission validation analyzes. In order to ensure the quality of this data, the TriOS sensors at field sites are swapped annually and calibrated at Tartu Observatory (Estonia). This work will investigate changes in these radiometric calibrations over time, to determine whether in-situ data is adversely affected by factors such as instrument drift or environmental degradation of the sensor. This information will be presented in the context of the system’s (and network’s) relevance to both current and future satellite missions for the purpose of radiometric data validation.

Matthew Beck, Royal Belgian Institute of Natural Sciences, Belgium, https://orcid.org/0000-0003-2847-8826

Kevin Ruddick, Royal Belgian Institute of Natural Sciences, Belgium

Francesca Ortenzio, Royal Belgian Institute of Natural Sciences, Belgium

Dieter Vansteenwegen, Flanders Marine Institute of the Sea, Belgium

Quinten Vanhellemont, Royal Belgian Institute of Natural Sciences, Belgium