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The NOAA20 satellite platform carries a VIIRS sensor that observes sunlight reflected from within the ocean surface layer at multiple wavelengths. These multi-spectral measurements are used to infer the diffuse attenuation coefficient (Kd) at 490nm wavelength which provides information on how light is attenuated in the water column. It is defined as the scaling length of the exponential decrease of the downwelling irradiance, and has units (m^-1). The VIIRS K490 product estimates Kd at 490nm wavelength, using a semi-empirical model based on the ratio of water leaving radiances at 490nm and 555nm. The algorithm is described at https://oceancolor.gsfc.nasa.gov/atbd/kd/.
Overview
The NOAA20 satellite platform carries a VIIRS sensor that observes sunlight reflected from within the ocean surface layer at multiple wavelengths. These multi-spectral measurements are used to infer the diffuse attenuation coefficient (Kd) at 490nm wavelength which provides information on how light is attenuated in the water column. It is defined as the scaling length of the exponential decrease of the downwelling irradiance, and has units (m^-1). The VIIRS K490 product estimates Kd at 490nm wavelength, using a semi-empirical model based on the ratio of water leaving radiances at 490nm and 555nm. The algorithm is described at https://oceancolor.gsfc.nasa.gov/atbd/kd/ .
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- How to use
- To access these resources, reference the Amazon Resource Name (ARN) using the AWS Command Line Interface (CLI). Learn more
- Description
- Cloud Optimised AODN dataset of IMOS - Satellite Remote Sensing - NOAA20 - 01 day - Diffuse attenuation coefficient (k490)
- Resource type
- S3 bucket
- Amazon Resource Name (ARN)
- arn:aws:s3:::aodn-cloud-optimised/satellite_diffuse_attenuation_coefficent_1day_noaa20.zarr
- AWS region
- ap-southeast-2
- AWS CLI access (No AWS account required)
- aws s3 ls --no-sign-request s3://aodn-cloud-optimised/satellite_diffuse_attenuation_coefficent_1day_noaa20.zarr/
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How to cite
Satellite - Ocean Colour - NOAA20 - 1 day - Diffuse attenuation coefficient (k490) was accessed on DATE from https://registry.opendata.aws/aodn_satellite_diffuse_attenuation_coefficent_1day_noaa20 .
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