Abstract:
The National Aeronautics Space Administration's (NASA's) Soil Moisture Active Passive (SMAP) mission will be completing it first extension phase in August 2020. The missi...Show MoreMetadata
Abstract:
The National Aeronautics Space Administration's (NASA's) Soil Moisture Active Passive (SMAP) mission will be completing it first extension phase in August 2020. The mission has so far completed five full annual cycles of global L-band radiometry. The baseline soil moisture algorithm is based on single-channel (V-polarization) retrieval of surface soil emissivity and the attenuation and scattering effects of the overlying vegetation is accounted for using ancillary data on the canopy cover derived from the seasonal climatology of optical/infrared data. There are however optional algorithms and research science products that use the V- and H-polarization measurements to simultaneously derived both the surface soil dual-polarization measurements are used in several algorithms to derive the surface soil emissivity as well as canopy properties. The vegetation optical depth resulting from the latter derivation is related to depth-average canopy water content and structural characteristics. These science products have been used in a number of global ecology as well as agroecosystems monitoring. In this paper the bases for these products, their strengths and shortcomings as well as example science results are presented.
Date of Conference: 26 September 2020 - 02 October 2020
Date Added to IEEE Xplore: 17 February 2021
ISBN Information: