- Related Research Areas
- Water & Energy Cycles
The proposed investigation will provide the guidance on developing improved soil moisture retrieval algorithms and associated radar system parameters for SMAP. The proposed investigation includes the following components: 1. Provide expert guidance for improved radar soil moisture algorithms by using theoretical models of scattering from bare and vegetated surfaces and experimental data to: - Validate a proposed time series algorithm to track changes in soil moisture - Blend the time-series and snap-shot algorithms together to track absolute levels of soil moisture - Validate the performance of these algorithms in the presence of scene heterogeneity, topographical variations and radar system noise and artifacts - Optimize the blending of the active and passive algorithm results to provide the best high-resolution soil moisture product 2. Support the definition of the SMAP radar flight and processing system requirements and implementation by - Translating science algorithm requirements into radar hardware and processing parameters - Deriving calibration requirements for the radar data based on the characteristics of the algorithm, radar hardware and processing system parameters. The proposed work directly supports the research objectives of NASA's strategic goal to Study the Earth from space to advance scientific understanding and meet societal needs and the research goal to Quantify the key reservoirs and fluxes in the global water cycle and improve models of water cycle change and fresh water availability. The SMAP mission plans to provide direct measurements of soil moisture to help improve understanding of regional water cycles and processes that link the water, energy and carbon cycles.
Project PI: Jakob van Zyl/Jet Propulsion Laboratory
Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena, CA 91109-8099
Phone: (818) 354-9500
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