Assimilation of Satellite Derived Soil Moisture Profiles into a Crop Modeling System for Robust Yield Estimates

Mishra, Vikalp ; Ellenburg, W Lee ; Cruise, James F ; Mecikalski, John R

关键词: SOIL MOISTURE;    FARM CROPS;    MATHEMATICAL MODELS;    COMPUTERIZED SIMULATION;    SATELLITE OBSERVATION;    MICROWAVE RADIOMETERS;    INFRARED RADIOMETERS;    YIELD;    ESTIMATES;    DATA CORRELATION;    ENERGY BUDGETS;    SMAP (SOIL MOISTURE ACTIVE PASSIVE);    REMOTE SENSING;   

RP-ID  :  MSFC-E-DAA-TN61695

学科分类：地球科学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Soil Moisture Measurement - Remote Sensing. - Microwave (MW) Remote Sensing: Physically based and quantitative in nature; Based on difference in dielectric constant; Coarse spatial resolution 25-40 km; Shallow SM estimation depth 0-5 cm (approx.); All weather capabilities (e.g. Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E), Soil Moisture and Ocean Salinity (SMOS), Soil Moisture Active Passive (SMAP) etc.) - Thermal Infrared (TIR) Remote Sensing: Indirect SM retrieval through energy flux estimations; Relatively better spatial resolution 1-10 km; Root-zone moisture retrieval capability; Can not penetrate through clouds, hence data gaps (e.g. Surface Energy Balance Algorithm for Land (SEBAL), Atmospheric Land Exchange Inverse (ALEXI) etc.)