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:

Disasters Applications

Latest Updates

September 14, 2018
Figure 1.  Weekly total rainfall (inches), valid 11-18 September 2018, from the National Weather Service Advanced Hydrologic Prediction Service (AHPS) product.  Four counties are denoted, for which soil moisture histogram animations are shown later in thi
  UPDATE 9/18/18: Soil moisture transformation from dry (brown/orange) to near saturation (purple/blue) over North Carolina associated with flooding rainfall from Hurricane #Florence (SPoRT-LIS product incorporating #MRMS precipitation). @NASA_LIS — NASA SPoRT (@NASA_SPoRT)...
September 1, 2017
SMAP-derived flood map of Texas from Hurricane Harvey
Video of SMAP-derived Flood Map of Texas from Hurricane Harvey 8/25/17 - 8/27/17 This animation depicts the flooded areas of Texas from August 25th – August 27th 2017 at 9km resolution and 3 hour intervals. The product shown is derived from SMAP data with a new algorithm developed by the post-flood crop damage assessment project (RF-CLASS system) funded the NASA Earth Science Disatsers Program. Please note this is an experimental product without full validation.