论文信息 - Measurement of complex dielectric constant of soils of Gujarat at X- and C-band microwave frequencies

Measurement of complex dielectric constant of soils of Gujarat at X- and C-band microwave frequencies

Dielectric constant and dielectric loss of soils collected from different districts of Gujarat state for various moisture contents have been measured at X- and C-band microwave frequencies. It has been observed that the dielectric constant of soils depend on the moisture content in the soils and frequency of measurement. Dielectric constant of soils increases slowly with increase in the moisture content in the soil up to the transition moisture, after which it increases rapidly with moisture content. The measured values of complex permittivity of dry and wet soils are compared with the values calculated from the empirical models and are found to be in agreement. The observed complex permittivity is used to calculate emissivity of soils for various moisture contents. It has been found that emissivity of soils decreases with increase in moisture content in the soil.

D H Gadani | D. H. Gadani | A. D. Vyas | A D Vyas

[1] Allan J. Delaney,et al. Dielectric properties of soils at UHF and microwave frequencies , 1974 .

[2] C. P. Smyth,et al. Microwave Absorption and Molecular Structure in Liquids. LXII. The Three Dielectric Dispersion Regions of the Normal Primary Alcohols1 , 1965 .

[3] Richard K. Moore,et al. Microwave Remote Sensing , 1999 .

[4] J. Kong,et al. Theory for passive microwave remote sensing of near‐surface soil moisture , 1977 .

[5] T. Schmugge,et al. An Empirical Model for the Complex Dielectric Permittivity of Soils as a Function of Water Content , 1980, IEEE Transactions on Geoscience and Remote Sensing.

[6] Richard Buchner,et al. High frequency permittivity and its use in the investigation of solution properties , 1991 .

[7] J. Behari,et al. Dielectric parameters of dry and wet soils at 14.89 GHz , 1998 .

[8] A. Gray. Microwave Remote Sensing of Sea Ice , 1981 .

[9] F. Ulaby,et al. Microwave Dielectric Behavior of Wet Soil-Part 1: Empirical Models and Experimental Observations , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[10] C. P. Smyth,et al. Microwave Absorption and Molecular Structure in Liquids. LXIII. Dielectric Behavior of Rigid Polar Molecules at 2.2‐mm Wavelength and Atomic Polarization , 1965 .

[11] N. E. Hill,et al. Dielectric properties and molecular behaviour , 1969 .

[13] Max Sucher,et al. Handbook of microwave measurements , 1963 .