Thermal infrared data from Landsat is used to determine how much water is used in a farm field thumbnail: http://svs.gsfc.nasa.gov/vis/a000000/a003600/a003632/et_wetfields.0700_gal.png
Data in Harmony: NASA’s Harmonized Landsat and Sentinel-2 Project
NASA’s Harmonized Landsat and Sentinel-2 (HLS) project is a groundbreaking initiative that combines data from Landsats 8 & 9 with the European Space Agency’s Sentinel-2A & 2B satellites.