Normalized Difference Vegetation Index (NDVI):It can indirectly provide information about soil moisture and plant health, as vegetation health is closely related to moisture availability.
Land Surface Temperature (LST): It is influenced by the moisture content of the surface and the atmosphere. Higher humidity levels tend to have a cooling effect on the land surface, so LST can provide insights into the relative humidity on the ground.
Microwave Remote Sensing: Passive and active microwave sensors are used to estimate soil moisture content based on the interaction of microwaves with the ground surface.
Thermal Infrared (TIR) Remote Sensing: TIR data can provide information on land surface temperature and evapotranspiration rates, which are related to humidity levels.
L-band Radiometry: L-band radiometry can provide estimates of soil moisture content by measuring the microwave radiation emitted from the ground surface.
Vegetation Water Content (VWC) Indices: Various vegetation indices, such as the Water Band Index (WBI) or the Water Index (WI), are specifically designed to detect water content in vegetation. These indices can indirectly indicate the moisture status of the ground.