SMAP (Soil Moisture Active Passive) is a remote sensing observatory that carries two instruments that can map soil moisture and determine the freeze or thaw state of the same area being mapped. Soil moisture content is mapped via a combination of radar and radiometer measurements, while the freeze/thaw mapping is accomplished using unique properties of the radar system’s measurements.
Learn more: https://smap.jpl.nasa.gov/observatory/overview/
- With data from SMAP satellite researchers can monitor the amount of water in soils to identify areas prone to droughts or floods. (https://disasters.nasa.gov/hurricane-florence-2018/hurricane-florence-resources-smap-soil-moisture-and-wind-estimates)