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Experiments of Soil Moisture Retrieval Based on Extended Kalman Filter

【摘要】:正This paper is intended to investigate the sensing of surface parameters by microwave radiometry.A Extended Kalman filter(EKF) is developed to manage the nonlinear relationship between surface parameters and radiometric signatures.Its performance of retrieving plant water content(PWC) and soil moisture content (SMC) from brightness temperatures is examined by using both predictions from model simulations and measurements from field experiments.It calculates background error covariance matrix using EKF method and is able to resolve the nonlinearity and discontinuity exist within model operator and observation operator.

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