Data provided by National Oceanic and Atmospheric Administration
Seasonal average diffuse attenuation coefficient at 490nm (Kd490) for the U.S. East Coast, from the VIIRS instrument aboard the S-NPP satellite, 2012-present, is produced using the Wang et al. (2009) algorithm, in which separate algorithms for clear open ocean and turbid coastal waters are weighted into a combined product. This approach improves accuracy across ocean conditions. Atmospheric correction uses the near-infrared (NIR) approach of Jiang and Wang (2014), referred to as the BMW atmospheric correction. The individual overpasses are composited into daily mean grids (~840m), then the daily mean grids are averaged into seasonal gridded chlorophyll-a. Data in the last year of the series represent near real-time data and are of lesser accuracy than the science-quality data of the years before the last year. Seasons represent the periods January to March, April to June, July to September, and October to December. More info: https://eastcoast.coastwatch.noaa.gov/cw_viirs_k490.php
About this Dataset
Updated: 2025-04-21
Metadata Last Updated:
2025-04-20T09:19:41.882Z
Date Created:
N/A
Data Provided by:
Dataset Owner:
N/A
| Title | Kd490, NOAA S-NPP VIIRS, Science Quality, U.S. East Coast 750m, Level 3, 2012-present, Seasonal |
|---|---|
| Description | Seasonal average diffuse attenuation coefficient at 490nm (Kd490) for the U.S. East Coast, from the VIIRS instrument aboard the S-NPP satellite, 2012-present, is produced using the Wang et al. (2009) algorithm, in which separate algorithms for clear open ocean and turbid coastal waters are weighted into a combined product. This approach improves accuracy across ocean conditions. Atmospheric correction uses the near-infrared (NIR) approach of Jiang and Wang (2014), referred to as the BMW atmospheric correction. The individual overpasses are composited into daily mean grids (~840m), then the daily mean grids are averaged into seasonal gridded chlorophyll-a. Data in the last year of the series represent near real-time data and are of lesser accuracy than the science-quality data of the years before the last year. Seasons represent the periods January to March, April to June, July to September, and October to December. More info: https://eastcoast.coastwatch.noaa.gov/cw_viirs_k490.php |
| Modified | 2025-04-20T09:19:41.882Z |
| Publisher Name | N/A |
| Contact | N/A |
| Keywords | color , data , diffuse attenuation coefficient at 490nm , downwelling radiative flux , downwelling spectral irradiance , image , imager , imager/radiometer , Kd-490 , Kd490 , kd490 , L3 , level 3 , level-3 , light attenuation , mapped , ocean , ocean color , oceans , optical , polar-orbiting , radiance , radiometer , remote sensing , s-npp , satellite , sea , seasonal , seawater , snpp , VIIRS , viirs , visible , water , water quality , Earth Science > Oceans > Water Quality , Earth Science > Oceans > Ocean Optics > Turbidity , Earth Science > Oceans > Ocean Optics > Ocean Color , Earth Science > Oceans > Ocean Optics > Extinction Coefficients , Earth Science > Oceans > Ocean Optics > Attenuation/Transmission , NOAA NESDIS CoastWatch East Coast Node , time , altitude , latitude , longitude , diffuse_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water , geoscientificInformation |
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