Harmonized Landsat Sentinel-2 (HLS) Version 2.0

[LP DAAC-EDL - kyrad]

The LP DAAC offers Harmonized Landsat Sentinel-2 (HLS) Version 2 products, which provide consistent surface reflectance (SR) and top of atmosphere (TOA) brightness data from the Operational Land Imager (OLI) aboard the joint NASA/USGS Landsat 8 satellite and the Multi-Spectral Instrument (MSI) aboard the ESA (European Space Agency) 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 full archive of these data are available through through NASA's Earthdata Search (https://search.earthdata.nasa.gov/search?q=hls) and AppEEARS: (https://lpdaac.usgs.gov/tools/appeears/)

It should be noted that challenges in the acquisition of source input data for the HLSS30 data product have resulted in data gaps and increased latency in delivery of this data product. Work toward a solution is ongoing, but there is currently not a date for when this issue is expected to be resolved.

Improvements to the HLS v2 include:

• Additional data layers consisting of solar and viewing azimuth and zenith angle bands.
• Aerosol Quality Assurance bits from the USGS Land Surface Reflectance Code (LaSRC) model output added into the Fmask data layer.
• LaSRC version 3.1.0 is used to atmospherically correct the input Sentinel data.

A citation containing the Digital Object Identifier (DOI) for each dataset is provided below.

HLS Operational Land Imager Surface Reflectance and TOA Brightness Daily Global 30m v2.0 – HLSL30.002 https://doi.org/10.5067/HLS/HLSL30.002
Masek, J., J. Ju, J. Roger, S. Skakun, E. Vermote, M. Claverie, J. Dungan, Z. Yin, B. Freitag, C. Justice. HLS Operational Land Imager Surface Reflectance and TOA Brightness Daily Global 30 m v2.0. 2021, distributed by NASA EOSDIS Land Processes DAAC, https://doi.org/10.5067/HLS/HLSL30.002. Accessed YYYY-MM-DD.

HLS Sentinel-2 Multi-spectral Instrument Surface Reflectance Daily Global 30 m v2.0 – HLSS30.002 https://doi.org/10.5067/HLS/HLSS30.002
Masek, J., J. Ju, J. Roger, S. Skakun, E. Vermote, M. Claverie, J. Dungan, Z. Yin, B. Freitag, C. Justice. HLS Sentinel-2 MSI Surface Reflectance Daily Global 30m v2.0. 2021, distributed by NASA EOSDIS Land Processes DAAC, https://doi.org/10.5067/HLS/HLSS30.002. Accessed YYYY-MM-DD.


LP DAAC Resources for HLS Data Products:

• HLS Quick Guide https://lpdaac.usgs.gov/documents/1117/HLS_Quick_Guide_v02.pdf
• Getting Started with Cloud-Native HLS Data in Python https://github.com/nasa/HLS-Data-Resources/blob/main/python/tutorials/HLS_Tutorial.ipynb
• HLS Subsetting, Processing and Exporting Reformatted (HLS SuPER) data prep script https://github.com/nasa/HLS-Data-Resources/blob/main/python/scripts/HLS_SuPER

Please contact LP DAAC User Services https://www.earthdata.nasa.gov/centers/lp-daac/contact with questions.

[mitchbon]

I am a bit confused, hasn't HLS 2.0 been available for some time now and is already fully back-processed?

[LP DAAC - dgolon]

Hi @mitchbon apologies for the confusion. The HLS Version 2 data currently available are the same as what was previously released. We are working on creating some posts on the forum that were previously not added here to help prepare for our move to the https://www.earthdata.nasa.gov/centers/lp-daac. We will make sure that is clearer in the future. Thanks -- Danielle