Abstract
The purpose of this study is to investigate radiation transfer in vegetation layer and apply it to soil moisture estimation by passive microwave imager in global scale. A radiation transfer scheme with multiple parameters for leaf, stem, and branch is used. Sensitivity analysis shows that not only LAI (Leaf Area Index) but SAI (Stem Area Index) has strong influence on PD (Poralization Difference of brightness temperatures) and FD (Frequency Difference of brightness temperature). Among several different estimation algorithms, an algorithm which calculates soil moisture by PD with temporal variable LAI and spatial distributed SAI can give the most realistic seasonal variation of surface soil moisture. In this algorithm, spatial distributed SAI is derived from annual minimum FD.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
