Soil Moisture Retrieval using Radar Remote Sensing Sensors

Dear Colleagues,

Soil moisture plays an essential role in the understanding of the continental water cycle. It is a key parameter in the separation of precipitation water between infiltration, runoff and evapotranspiration processes and in water management. In this context, active microwave remote sensing has shown a high potential to retrieve surface soil moisture through the use of SAR and other radar sensors (scatterometer, altimeter, GNSS-R, etc.). In the last few years, with the arrival of new sensors with important capacities in terms of spatial and temporal resolutions, it becomes possible to propose operational soil moisture products and to assimilate this parameter in water process modeling. This Special Issue has as principal objective to present the principal algorithms and methodologies around the use of active sensors (Sentinel1, Alos-2, TERRASAR-X, RADARSAT, ASCAT, CYGNSS, etc.) in the estimation and use of soil moisture. Different topics are considered:

• Signal physics of radar measurement and backscattering modeling over soil surfaces
• Inversion algorithms to estimate soil moisture
• Roughness and vegetation effects of radar signal
• Synergy between radar and other sensors for soil moisture retrieval
• Assimilation of soil moisture products in process models

Dr. Mehrez Zribi
Dr. Nicolas Baghdadi
Dr. Clément Albergel
Guest Editors

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