Effect of Structural Uncertainty in Passive Microwave Soil Moisture Retrieval Algorithm
Passive microwave sensors use a radiative transfer model (RTM) to retrieve soil moisture (SM) using brightness temperatures (TB) at low microwave frequencies.Vegetation Rack Set optical depth (VOD) is a key input to the RTM.Retrieval algorithms can analytically invert the RTM using dual-polarized TB measurements to retrieve the VOD and SM concurren