Geoscience Australia Sentinel-2B MSI NBART Collection 3 - DEA Surface Reflectance NBART (Sentinel-2B MSI)

DEA Surface Reflectance Nadir corrected Bidirectional reflectance distribution function Adjusted Reflectance Terrain corrected (NBART) Sentinel-2B Multispectral Instrument (MSI) is part of a suite of Digital Earth Australia's (DEA) Surface Reflectance datasets that represent the vast archive of images captured by the US Geological Survey (USGS) Landsat and European Space Agency (ESA) Sentinel-2 satellite programs, which have been validated, calibrated, and adjusted for Australian conditions — ready for easy analysis.

Background:

This is a sub-product of DEA Surface Reflectance (Sentinel-2B MSI). See the parent product for more information.

Reflectance data at top of atmosphere (TOA) collected by Sentinel-2B MSI sensors can be affected by atmospheric conditions, sun position, sensor view angle, surface slope and surface aspect.

Surfaces with varying terrain can introduce inconsistencies to optical satellite images through irradiance and bidirectional reflectance distribution function (BRDF) effects. For example, slopes facing the sun appear brighter compared with those facing away from the sun. Likewise, many surfaces on Earth are anisotropic in nature, so the signal picked up by a satellite sensor may differ depending on the sensor’s position.

These need to be reduced or removed to ensure the data is consistent and can be compared over time.

What this product offers:

This product takes Sentinel-2B MSI imagery captured over the Australian continent and corrects the inconsistencies across the land and coastal fringe. It achieves this using Nadir corrected Bi-directional reflectance distribution function Adjusted Reflectance (NBAR).

In addition, this product has a terrain illumination correction applied to correct for varying terrain.

The resolution is a 10/20/60 m grid based on the ESA level 1C archive.

Applications:

- The development of derivative products to monitor land, inland waterways and coastal features, such as:

- urban growth

- coastal habitats

- mining activities

- agricultural activity (e.g. pastoral, irrigated cropping, rain-fed cropping)

- water extent

- The development of refined information products, such as:

- areal units of detected surface water

- areal units of deforestation

- yield predictions of agricultural parcels

- Compliance surveys

- Emergency management

Identification info

Date (Creation): 2021-09-13T14:34:57

Date (Publication): 2022-05-11T04:37:17

Edition: 3.0.0

Citation identifier: Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/146569

Citation identifier: Digital Object Identifier/https://dx.doi.org/10.26186/146569

Cited responsible party

Role	Organisation / Individual Name	Details
Owner	Commonwealth of Australia (Geoscience Australia)	Voice
Publisher	Commonwealth of Australia (Geoscience Australia)	Voice

Purpose

This product represents standardised optical surface reflectance using robust physical models to correct for variations and inconsistencies in image radiance values.

It delivers modelled surface reflectance from Sentinel-2B MSI data using physical rather than empirical models. This ensures that the reflective value differences between imagery acquired at different times by different sensors will be primarily due to on-ground changes in biophysical parameters rather than artefacts of the imaging environment.

This product is created using a physics-based, coupled Bidirectional Reflectance Distribution Function (BRDF) and atmospheric correction model that can be applied to both flat and inclined surfaces (Li et al. 2012). The resulting surface reflectance values are comparable both within individual images and between images acquired at different times.

Point of contact

Role	Organisation / Individual Name	Details
Resource provider	Place, Space and Communities Division	External Contact
Point of contact	Glitsos, B.	Space Division Internal Contact

Topic category

Geoscientific information

Extent

Maintenance and update frequency: As needed

Resource format

Title: Product data repository: Various Formats

Protocol: FILE:DATA-DIRECTORY

Name of the resource: Data Store directory containing the digital product files

Description: Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

theme.ANZRC Fields of Research.rdf

EARTH SCIENCES

Theme

analysis ready data

Theme

satellite images

Theme

Earth observation

Theme

Sentinel

Keywords

Published_External

Resource constraints

Title: Creative Commons Attribution 4.0 International Licence

Alternate title: CC-BY

Edition: 4.0

Website

http://creativecommons.org/licenses/

Access constraints: License

Use constraints: License

Other constraints: CC BY Attribution 4.0 International License

Resource constraints

Title: Australian Government Security ClassificationSystem

Edition date: 2018-11-01T00:00:00

Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification: Unclassified

Associated resource

Association Type: Informed

Title: Geoscience Australia Sentinel-2B MSI Analysis Ready Data Collection 3 -

Citation identifier: 146551

Citation identifier: 650e74ab-cd80-46e7-8f2f-6de5365705c8

Website

https://pid.geoscience.gov.au/dataset/ga/146551

Link to eCat metadata record landing page

Associated resource

Association Type: Cross reference

Title: Geoscience Australia Sentinel-2B Observation Attributes Collection 3

Citation identifier: 146570

Citation identifier: 8dce4f9e-5a91-459a-b8d3-487ca834eb09

Website

https://pid.geoscience.gov.au/dataset/ga/146570

Link to eCat metadata record landing page

Associated resource

Association Type: Cross reference

Website

https://cmi.ga.gov.au/data-products/dea/672/dea-surface-reflectance-nbart-sentinel-2b-msi

More extensive metadata record for this data poroduct. Contained on the CMI.

Language: English

Character encoding: UTF8

Distribution Information

Distributor contact

Role	Organisation / Individual Name	Details
Distributor	Commonwealth of Australia (Geoscience Australia)	Voice

OnLine resource: Link to DEA public data on AWS

Link to DEA public data on AWS

Distribution format

OnLine resource: Link to NCI Thredds

Link to NCI Thredds

Distribution format

Resource lineage

Statement

This is a sub-product of Geoscience Australia Sentinel-2B MSI Analysis Ready Data Collection 3 - DEA Surface Reflectance (Sentinel-2B MSI). See the parent product for more information.

Data sources

- SRTM DSM/DEM data

- Ephemeris Data

- Aerosol Optical Depth

- Precipitable Water for Entire Atmosphere

- MCD43A1 Collection 6

- Kuruzc 2005 TOA Solar Irradiance

- Ozone data

- Sentinel-2 level 1C

Processing steps

- Longitude and Latitude Calculation

- Satellite and Solar Geometry Calculation

- Aerosol Optical Thickness Retrieval

- BRDF Shape Function Retrieval

- Ozone Retrieval

- Elevation Retrieval and Smoothing

- Slope and Aspect Calculation

- Incidence and Azimuthal Incident Angles Calculation

- Exiting and Azimuthal Exiting Angles Calculation

- Relative Slope Calculation

- Terrain Occlusion Mask

- MODTRAN

- Atmospheric Correction Coefficients Calculation

- Bilinear Interpolation of Atmospheric Correction Coefficients

- Surface Reflectance Calculation (NBAR)

Hierarchy level: Dataset

Description: Please refer to the lineage section.

Metadata constraints

Title: Australian Government Security Classification System

Edition date: 2018-11-01T00:00:00

Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification: Unclassified

Metadata

Metadata identifier

urn:uuid/9a28ebfd-3bc6-4e97-a9a5-0eb775a994f8

Title: GeoNetwork UUID

Language: English

Character encoding: UTF8

Contact

Role	Organisation / Individual Name	Details
Point of contact	Commonwealth of Australia (Geoscience Australia)	Voice
Point of contact	Glitsos, B.	Space Division Internal Contact

Type of resource

Resource scope: Dataset

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier: eCatId/146569

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/9a28ebfd-3bc6-4e97-a9a5-0eb775a994f8

Metadata linkage

https://ecat.ga.gov.au/geonetwork/accessDenied.jsp/eng/catalog.search#/metadata/9a28ebfd-3bc6-4e97-a9a5-0eb775a994f8

Date info (Creation): 2021-09-13T14:34:57+10:00

Date info (Revision): 2022-04-20T11:46:38+10:00

Metadata standard

Title: AU/NZS ISO 19115-1:2014

Metadata standard

Title: ISO 19115-1:2014

Metadata standard

Title: ISO 19115-3

Title: Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition: Version 2.0, September 2018

Citation identifier: https://pid.geoscience.gov.au/dataset/ga/122551

Spatial extent

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Read here the full details and access to the data.

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