- Volume 11 Issue 3
In this paper several methods for retriving appropriate values of effective soil moisture contents from natural soil surfaces are introduced and compared each other. The soil medium has usually a nonuniform moisture profile; i.e., relatively dry at the top layer and relatively wet at the bottom layer. The effective soil moisture represents the quantitative value of soil moisture of the inhomogeneous soil medium in an average sense. A simple method is an arithmetic averaging of soil moisture values obtained from several layers of a soil surface. Otherwise, the penetration depths can be computed from a homogeneous and an inhomogeneous soil surfaces and compared in order to obtain the effective soil mosture. The other method is to obtain the effective soil moisture by comparing the reflectivities from both of a homogeneous and an inhomogeneous surfaces. Those methods are compared and the reflectivity technique is examined in more detail since the rader scattering is dominated by the reflectivity instead of the penetration.
- IEEE Trans. Geosci. Remote Sensing v.23 Microwave dielectric behavior of wet soil -part-I: Empirical models and experimental observations M.T.Hallikainen,;F.T.Ulaby,;M.C.Dobson,;M.A.El-rayes,;L.Wu
- IEEE Intern. Geosci. Remote Sensing Symp. (IGARSS), Proc. v.1 Theory and design of a field-portable dielectric measurement system G.S.Brunfedlt
- Microwave Remote Sensing,Active and Passive v.I,II,III F.T.Ulaby,;R.K.Moore,;A.K.Fung
- IEEE Trans. Geosci. Remote Sensing v.30 An empirical model and an inversion technique for radar scattering from bare soil srufaces Y.Oh,;K.Sarabandi,;F.T.Ulaby
- IGARSS'95, Proc. v.2 Development of a semi-empirical polarimetric scattering model for microwave radar observations from soil surfaces Y.Oh,;K.Sarabandi,;F.T.Ulaby