HLSS30 v015

HLS Sentinel-2 MSI Surface Reflectance Daily Global 30 m


PI: Jeffrey G. Masek, Junchang Ju

Provisional HLS data have not been validated for their science quality and should not be used in science research or applications. If you are interested in exploring these provisional datasets please download the data from NASA's Earthdata Search. If you have any feedback or questions on the data please contact lpdaac@usgs.gov or join our HLS conversation on the Earthdata Forum.

Description

The Harmonized Landsat and Sentinel-2 (HLS) project provides consistent surface reflectance data from the Operational Land Imager (OLI) aboard the joint NASA/USGS Landsat 8 satellite and the Multi-Spectral Instrument (MSI) aboard the European Union’s Copernicus Sentinel-2A and Sentinel-2B satellites. The combined measurement enables global observations of the land every 2-3 days at 30 meter (m) spatial resolution. The HLS project uses a set of algorithms to obtain seamless products from OLI and MSI that include atmospheric correction, cloud and cloud-shadow masking, spatial co-registration and common gridding, illumination and view angle normalization, and spectral bandpass adjustment.

The HLSS30 product provides 30 m Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR) and is derived from Sentinel-2A and Sentinel-2B MSI data products. The HLSS30 and HLSL30 products are gridded to the same resolution and Military Grid Reference System (MGRS) tiling system, and thus are “stackable” for time series analysis.

The HLSS30 product is provided in Cloud Optimized GeoTIFF (COG) format, and each band is distributed as a separate COG. There are 13 bands included in the HLSS30 product along with four angle bands and a quality assessment (QA) band. For a more detailed description of the individual bands provided in the HLSS30 product, please see the User Guide.

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Characteristics

Product Maturity

Provisional HLS data have not been validated for their science quality and should not be used in science research or applications. If you are interested in exploring these provisional datasets please download the data from NASA's Earthdata Search. If you have any feedback or questions on the data please contact lpdaac@usgs.gov or join our HLS conversion on the Earthdata Forum.

Collection and Granule

Collection

Characteristic Description
CollectionHLS
DOI10.5067/HLS/HLSS30.015
File Size~20 MB
Temporal ResolutionDaily
Temporal Extent2014-04-03 to Present
Spatial ExtentGlobal (Non-Antarctic)
Coordinate SystemUniversal Transverse Mercator (UTM)
DatumWorld Geodetic System (WGS84)
File FormatGeoTIFF
Geographic Dimensions10980 km x 10980 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers18
Columns/Rows3660 x 3660
Pixel Size30 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
Band 1 Coastal Aerosol N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 2 Blue N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 3 Green N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 4 Red N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 5 Red Edge1 N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 6 Red Edge2 N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 7 Red Edge3 N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 8 NIR Broad N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 8A NIR Narrow N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 9 Water Vapor N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 10 Cirrus N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 11 SWIR1 N/A 16-bit signed integer -9999 N/A N/A 0.0001
Band 12 SWIR2 N/A 16-bit signed integer -9999 N/A N/A 0.0001
Fmask Quality Bits Bit Field 8-bit unsigned integer 255 N/A N/A N/A
SZA Sun Zenith Angle Degree 16-bit unsigned integer 40000 N/A N/A 0.01
SAA Sun Azimuth Angle Degree 16-bit unsigned integer 40000 N/A N/A 0.01
VZA View Zenith Angle Degree 16-bit unsigned integer 40000 N/A N/A 0.01
VAA View Azimuth Angle Degree 16-bit unsigned integer 40000 N/A N/A 0.01

Product Quality

Additional information related to cloud and aerosol quality along with QA mappings are provided under section 6.5 of the User Guide.

Known Issues

Interruptions in data service occurred during a restaging of backlogged data between June 1 and June 15, 2021 for both HLSS30 and HLSL30 version 1.5 data products. During this time period increased errors in the processing workflow resulted in a significant number of data ingestion failures and thus, significant gaps in data availability. Given the pending release of the version 2.0, science quality HLS products, these missing data will not be filled for version 1.5. Users of the provisional version 1.5 products should be aware of the significant data gap in this two week window. The version 2.0 products will incorporate these data back into the archive. If you have any feedback or questions on the data please contact Customer Services or join our HLS conversion on the Earthdata Forum.


About the image

Agricultural fields over northeastern Iowa using the HLSS30 product from July 11, 2020.

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Documentation

User Guide
Algorithm Theoretical Basis Document (ATBD)
Earthdata Search Quick Guide

Using the Data

Access Data

Citation

DOI: 10.5067/HLS/HLSS30.015

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