This portal provides access to all QC-approved WATERHYPERNET data sets for download by users.
Access to data requires registration by completing the contact form, providing email address and full name. Registered users will be provided with a data access password and will be kept informed of processing updates, events and data archive expansion by email.
WATERHYPERNET data is distributed under the CC-BY-ND licence and is governed by the HYPERNETS data policy, which provides guidelines for acknowledging the site Principal Investigators (PIs).
At the latest release (2025-06-20), the WATERHYPERNET archive consists of data for the years 2023 and 2024 from 7 sites and can be downloaded per site by clicking on the individual site links:
The full all-site archive can be downloaded by clicking on the all-site link:
The above links open a SFTPGo data browser, which can be navigated through the hierarchy of sites, years, months, days and individual measurements if the full-duration data archive is not required. After entering the data browser, click to left of the directory/filename and select Actions/Download in the drop-down menu to download the selected directories/files.
The available site list and data duration will be expanded with more sites and more years as Quality Control proceeds and the existing datasets may be updated with processing improvements, typically at 6-monthly intervals.
Data is provided in NetCDF format with one file per hyperspectral water-leaving radiance reflectance measurement. Data acquisition is typically made every 15-30 minutes during daytime, but only QC-approved acquisitions are distributed to data users, yielding between zero and about 50 measurements per day. In addition to the water-leaving radiance reflectance spectrum, supporting data included in the NetCDF file includes: measurands such as downwelling irradiance, downwelling (sky) radiance, upwelling (water+interface) radiance; processing parameters such as wind speed and effective Fresnel reflectance; geometric parameters such as sun zenith angle, viewing nadir angle, relative to sun viewing azimuth angle; and metadata such as UTC time, latitude, longitude, site Principal Investigator, etc.
More information on the network, instruments (PANTHYR and HYPSTAR®), sites and measurement method and an overview of data processing can be found in [Ruddick et al, 2024]. More detailed information on HYPSTAR® data processing and quality control can be found in [De Vis, Goyens et al, 2024]. Other publications using WATERHYPERNET data, including site-specific studies can be found at https://waterhypernet.org/publications/.
Further questions on the datasets can be sent via the contact form.
This data portal will be expanded in the coming months with data user support tools, FAQ and forum. Registered users will be kept informed of these developments.
The map below is under development and is not yet ready for use in data download. Data access is currently only via the links provided above.
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Older versions of WATERHYPERNET data have been provided via ZENODO and as Supplementary Data to various publications. These are listed below for historical reasons, but do not correspond to the latest-avaliable data processing and Quality Control and are not recommended for further exploitation, except as regards traceability and reproducibility of the previously published results.
WATERHYPERNET beta-release data from the RT1/Oostende deployment for the period 2019-12-11 to 2020-07-15 , selected to coincide with OLCI matchups and binned to OLCI bands and can be found in the Supplementary Data to [Vanhellemont and Ruddick, 2021].
WATERHYPERNET beta-release data from the Aqua Alta Oceanographic Tower and the RT1/Oostende deployments for the periods from 2019-09-26 and 2019-12-11 respectively until 2020-07-02, selected to coincide with Sentinel-2 and Landsat-8 matchups and binned to the respective spectral bands bands can be downloaded here for Sentinel-2 and here for Landsat-8. Full details can be found in [Vanhellemont, 2020].
The first WATERHYPERNET/PANTHYR hyperspectral datasets with both pre- and post-deployment calibration coefficients have been distributed via ZENODO – see https://zenodo.org/records/10024445 for the Acqua Alta site (October 2019–October 2020 and November 2020–March 2022) and https://zenodo.org/records/10024143 for the Oostende site (December 2019–August 2020 and February 2022–November 2022).
The first beta-release HYPSTAR® hyperspectral datasets for measurements up to April 2023 have been distributed via ZENODO – see 10.5281/zenodo.8059880 for the Zeebrugge (M1BE) site, 10.5281/zenodo.8057822 for Lake Garda (GAIT), 10.5281/zenodo.8057788 for the Gironde Estuary (MAFR), 10.5281/zenodo.8057530 for Acqua Alta (VEIT), 10.5281/zenodo.8057776 for the Etang de Berre (BEFR) and 10.5281/zenodo.8057727 for the La Plata Estuary (LAPR).