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. Author manuscript; available in PMC: 2020 Aug 4.
Published in final edited form as: IEEE Trans Geosci Remote Sens. 2017 Feb 14;55(5):2959–2971. doi: 10.1109/TGRS.2017.2656859

TABLE IV.

Seasonal Intercomparison of SMAP With SMOS, ASCAT, and AMSR2 for April 1, 2015–April 1, 2016. Only the Northern Hemisphere Is Considered and the IGBP Classes ENF, EBF, DNF, DBF, MXD, PEW, URB, AND SNI, and Pixels Where the Respective Soil Moisture Algorithm Identifies Open Water Surfaces Are Excluded

Metrics Mar-Apr-May Jun-Jul-Aug Sep-Oct-Nov Dec-Jan-Feb All
SMOS ASCAT AMSR2 SMOS ASCAT AMSR2 SMOS ASCAT AMSR2 SMOS ASCAT AMSR2 SMOS ASCAT AMSR2
ubRMSD (m3/m3) 0.060 0.092 0.084 0.070 0.132 0.094 0.063 0.098 0.078 0.055 0.073 0.087 0.065 0.114 0.087
Bias (m3/m3) −0.001 −0.006 0.035 −0.021 −0.082 0.012 −0.005 −0.033 0.033 0.004 0.019 0.038 −0.009 −0.037 0.027
RMSD (m3/m3) 0.060 0.092 0.091 0.073 0.156 0.095 0.063 0.103 0.084 0.055 0.075 0.095 0.065 0.119 0.091
Correlation R 0.845 0.697 0.404 0.725 0.574 0.387 0.810 0.700 0.468 0.822 0.721 0.281 0.789 0.630 0.379