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. Author manuscript; available in PMC: 2021 Mar 15.
Published in final edited form as: Remote Sens Environ. 2020 Mar 15;239:10.1016/j.rse.2019.111622. doi: 10.1016/j.rse.2019.111622

Figure 4.

Figure 4.

Normalized error reduction (NER) of the grid-level soil moisture states for the first (0– 5 cm; θ1) and root-zone (5 − 90 cm; θrz) soil layers. Either daily fPET or biweekly θSSM is assimilated into the model using different ensemble sizes or particle numbers for the ensemble Kalman filter (EnKF) and particle filter (PF), respectively. Median values of NER from 50 separate synthetic experiments are shown as circles, and error bars indicate the full range of NER from minimum to maximum values.