ALBERT

Beschreibung: This dataset contains paired optical and biogeochemical properties sampled in the Belgian Coastal Zone and inland waters of Flanders, Belgium, for the growth season period (March to October) of 2017, 2018, and 2019. This dataset was collected to support: (1) development and validation of hyperspectral algorithms for aquatic retrievals with in situ instrumentation; (2) development and validation of hyperspectral algorithms for aquatic retrievals with Earth Observation; (3) development and validation of multispectral algorithms and aquatic applications to high spatial resolution sensors. The data were collected over a series of short campaigns, with variable frequency depending on the water system and sampling year. The systems sampled were lakes, a lagoon, an estuary and coastal waters. The data consist of three types of data: I - Inherent Optical Properties: - Spectral CDOM absorption coefficient (〈 0.45 μm; cuvette): (A) Measured, (B) Fitted to hyperbolic model, (C) Hyperbolic slope; - Spectral particle absorption coefficient (〉 0.7 μm; filterpad inside integrating sphere): (A) Measured; - Spectral de-pigmented particle absorption (ad) coefficient (〉 0.7 μm; chemical oxidation): (A) Measured, (B) Fitted to exponential model, (C) Exponential slope; - Spectral in vivo pigment absorption coefficient (〉 0.7 μm; calculated by difference): (A) From measured ad, (B) From fitted ad; - Spectral particle scattering coefficient (acceptance angle of 0.074 degrees): (A) Measured, (B) Compensated to equivalent 0.018 degree acceptance angle; - Spectral particle beam attenuation coefficient (acceptance angle of 0.074 degrees): (A) Measured, (B) Compensated to equivalent 0.018 degree acceptance angle; - Near-forward particle volume scattering function (laser diffraction at 670 nm): (A) Measured with a LISST-100X, (B) Measured with a LISST-200X; - Turbidity (side-scattering, NIR): (A) Measured; II - Apparent Optical Properties: - Lambert-equivalent substrate bi-hemispherical reflectance (spectrometer and imaging spectrometer): (A) Measured; - Lambert-equivalent water-leaving bi-hemispherical reflectance (Above water and on-water methods): (A) Estimated or measured, compensated for instrument self-shadowing; - Secchi disk depth: (A) Measured, (B) Compensated for the Sun elevation; III - Biogeochemical properties: - Suspended particulate matter (SPM) concentration (〉 0.7 μm; gravimetric method): (A) Measured; - Mineral fraction of the SPM (〉 0.7 μm; thermal oxidation, gravimetric method): (A) Measured; - Particle size distribution (laser diffraction): (A) Volume concentration from LISST-100X, (B) Volume concentration from LISST-200X; - Apolar pigment concentration (〉 0.7 μm; HPLC): (A) Mass concentration; - Bottom cover classification (visual description): (A) Observed in situ; - Phytoplankton counts (55 µm to 300 µm; flow imaging microscopy): (A) Measured; - Amplicon sequencing of phytoplankton (〉 0.7 μm; Illumina): (A) Spuikom lagoon, (B) Belgian Coastal Zone;

Beschreibung: Lambertian-equivalent hyperspectral reflectance measurements were completed on 26 June 2019 on the east shore of the Spuikom lagoon in Ostend, Belgium between 10:00 – 12:00 local time (UTC + 2 hrs) under natural sunlight. An ASD spectroradiometer covering the wavelength ranges 350 nm to 2500 nm was operated in reflectance mode and was fitted with an 8° field-of-view lens. Relative reflectance was derived by white referencing using the 99% white Lambertian plaque, the calibration reflectance factor of the panel is also provided with this dataset. Each relative reflectance measurement over a sample was taken as an average of 30 continuous scans. The measurement sequence involved a white reference measurement followed by a sequence of 10 random point sampling of the sample and then another white reference. We did concrete bricks near the dry land target that had a pattern of faded red and gray bricks. We did first 10 over gray and the second 10 over red bricks. We measured over the asphalt in the road next to the sail club and adjacent to the dry target.The plastic targets included small boats, polyethylene terephthalate (PET) water bottles and low-density polyethylene (LDPE) PMD plastic bags.

Beschreibung: Lambertian-equivalent hyperspectral reflectance measurements were completed on 26 June 2019 on the east shore of the Spuikom lagoon in Ostend, Belgium between 10:00 – 12:00 local time (UTC + 2 hrs) under natural sunlight. An ASD spectroradiometer covering the wavelength ranges 350 nm to 2500 nm was operated in reflectance mode and was fitted with an 8° field-of-view lens. Relative reflectance was derived by white referencing using the 99% white Lambertian plaque, the calibration reflectance factor of the panel is also provided with this dataset. Each relative reflectance measurement over a sample was taken as an average of 30 continuous scans. The measurement sequence involved a white reference measurement followed by a sequence of 10 random point sampling of the sample and then another white reference. We did concrete bricks near the dry land target that had a pattern of faded red and gray bricks. We did first 10 over gray and the second 10 over red bricks. We measured over the asphalt in the road next to the sail club and adjacent to the dry target.The plastic targets included small boats, polyethylene terephthalate (PET) water bottles and low-density polyethylene (LDPE) PMD plastic bags.

Beschreibung: Lambertian-equivalent hyperspectral reflectance measurements were completed on 26 June 2019 on the east shore of the Spuikom lagoon in Ostend, Belgium between 10:00 – 12:00 local time (UTC + 2 hrs) under natural sunlight. An ASD spectroradiometer covering the wavelength ranges 350 nm to 2500 nm was operated in reflectance mode and was fitted with an 8° field-of-view lens. Relative reflectance was derived by white referencing using the 99% white Lambertian plaque, the calibration reflectance factor of the panel is also provided with this dataset. Each relative reflectance measurement over a sample was taken as an average of 30 continuous scans. The measurement sequence involved a white reference measurement followed by a sequence of 10 random point sampling of the sample and then another white reference. We did concrete bricks near the dry land target that had a pattern of faded red and gray bricks. We did first 10 over gray and the second 10 over red bricks. We measured over the asphalt in the road next to the sail club and adjacent to the dry target. The plastic targets included small boats, polyethylene terephthalate (PET) water bottles and low-density polyethylene (LDPE) PMD plastic bags.

Beschreibung: Lambertian-equivalent hyperspectral reflectance measurements were completed on 26 June 2019 on the east shore of the Spuikom lagoon in Ostend, Belgium between 10:00 – 12:00 local time (UTC + 2 hrs) under natural sunlight. An ASD spectroradiometer covering the wavelength ranges 350 nm to 2500 nm was operated in reflectance mode and was fitted with an 8° field-of-view lens. Relative reflectance was derived by white referencing using the 99% white Lambertian plaque, the calibration reflectance factor of the panel is also provided with this dataset. Each relative reflectance measurement over a sample was taken as an average of 30 continuous scans. The measurement sequence involved a white reference measurement followed by a sequence of 10 random point sampling of the sample and then another white reference. We did concrete bricks near the dry land target that had a pattern of faded red and gray bricks. We did first 10 over gray and the second 10 over red bricks. We measured over the asphalt in the road next to the sail club and adjacent to the dry target.The plastic targets included small boats, polyethylene terephthalate (PET) water bottles and low-density polyethylene (LDPE) PMD plastic bags.