Harmonized Landsat and Sentinel-2 (HLS)

Datasets:

• HLS Surface Reflectance (SR), version 2

Description: The Harmonized Landsat and Sentinel-2 (HLS) project is a NASA initiative aiming to produce a seamless surface reflectance record from the Operational Land Imager (OLI) and Multi-Spectral Instrument (MSI) aboard Landsat-8/9 and Sentinel-2A/B remote sensing satellites, respectively. The HLS products are created from a set of algorithms: atmospheric correction, cloud and cloud-shadow masking, geographic co-registration and common gridding, bidirectional reflectance distribution function (BRDF) normalization, and bandpass adjustment.

The HLS Version-2.0 data are available now with global coverage (except for Antarctica). With four sensors currently in this virtual constellation, HLS provides observations once every three days at the equator and more frequently with increasing latitude. The HLS project is a collaboration between NASA and USGS, with the science team at NASA Goddard Space Flight Center supported by USGS Earth Resources Observation and Science (EROS) Center on atmospheric correction, the production team at NASA Marshall Space Flight Center, and product archive at USGS.

Organization: NASA and USGS

Website: https://www.earthdata.nasa.gov/data/projects/hls

Google Earth Engine: the following Google Earth Engine products are merged to create the HLS collection in Climate Engine:

• HLSS30: HLS Sentinel-2 Multi-spectral Instrument Surface Reflectance Daily Global 30m (NASA/HLS/HLSS30/v002)
• HLSL30: HLS-2 Landsat Operational Land Imager Surface Reflectance and TOA Brightness Daily Global 30m (NASA/HLS/HLSL30/v002)

Spatial resolution: 30-m

Time Span:

• HLS Surface Reflectance (SR), version 2: 2013 to Present (updated every 2-3 days)
  • The Landsat component begins on 2013-04-11 and includes OLI sensors (Landsat 8 and Landsat 9); the Sentinel-2 component begins 2015-11-28.

Variables:

• EVI: Enhanced Vegetation Index
• NDVI: Normalized Difference Vegetation Index
• NDSI: Normalized Difference Snow Index
• NDWI: Normalized Difference Water Index (NIR / SWIR1; Gao)
• NDWI: Normalized Difference Water Index (Green / NIR; McFeeters)
• NDWI:u – Normalized Difference Water Index (Green / SWIR1; Xu)
• NDWI: Normalized Difference Water Index (Green / SWIR2; Hall)
• NDWI: Normalized Difference Water Index (SWIR1 / Green; Allen)
• NBR – Normalized Burn Ratio
• SAVI – Soil-adjusted Vegetation Index
• MSAVI – Modified Soil-adjusted Vegetation Index
• True Color
• Color Infrared (False Color)
• Blue – Blue band
• Green – Green band
• Red – Red band
• NIR – Near Infrared
• SWIR1 – Shortwave Infrared (SWIR1)
• SWIR2 – Shortwave Infrared (SWIR2)
• Green/blue ratio
• Green/red ratio
• Green/NIR ratio
• Red/blue ratio
• Red/NIR ratio
• Blue/NIR ratio

Terms of Use:

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