Wave tilt of radio waves propagating over a layered ground

Geophysics ◽  
1996 ◽  
Vol 61 (6) ◽  
pp. 1647-1652 ◽  
Author(s):  
James R. Wait ◽  
Khalid A. Nabulsi
Keyword(s):  
Frequency Dependence ◽  
Half Space ◽  
Electrical Characteristic ◽  
Radio Waves ◽  
Complex Wave ◽  
Height Dependence ◽  
Layered Ground ◽  
Wave Tilt ◽  
Layered Half Space

We call attention here to the limitation of the “Q approximation” in characterizing the complex wave tilt W over a layered half‐space. Using an improved formulation the frequency dependence of W is shown to be a discriminator of the electrical characteristic of the subsurface. The height dependence of the observer is also illustrated.

scholarly journals Wave tilt sounding of a linearly inhomogeneous layered half-space

1979 ◽  
Vol 27 (3) ◽  
pp. 417-419 ◽  
Author(s):  
L. Warne ◽  
D. Evans ◽  
C. Elachi
Keyword(s):  
Half Space ◽  
Wave Tilt ◽  
Layered Half Space

Seismic Waves in a Laterally Inhomogeneous Layered Medium, Part I: Theory

1997 ◽  
Vol 64 (1) ◽  
pp. 50-58 ◽  
Author(s):  
Ruichong Zhang ◽  
Liyang Zhang ◽  
Masanobu Shinozuka
Keyword(s):  
Wave Field ◽  
Half Space ◽  
Seismic Waves ◽  
Scattered Wave ◽  
Inhomogeneous Layer ◽  
Dislocation Source ◽  
Seismic Dislocation ◽  
Body Forces ◽  
The Mean ◽  
Layered Half Space

Seismic waves in a layered half-space with lateral inhomogeneities, generated by a buried seismic dislocation source, are investigated in these two consecutive papers. In the first paper, the problem is formulated and a corresponding approach to solve the problem is provided. Specifically, the elastic parameters in the laterally inhomogeneous layer, such as P and S wave speeds and density, are separated by the mean and the deviation parts. The mean part is constant while the deviation part, which is much smaller compared to the mean part, is a function of lateral coordinates. Using the first-order perturbation approach, it is shown that the total wave field may be obtained as a superposition of the mean wave field and the scattered wave field. The mean wave field is obtainable as a response solution for a perfectly layered half-space (without lateral inhomogeneities) subjected to a buried seismic dislocation source. The scattered wave field is obtained as a response solution for the same layered half-space as used in the mean wave field, but is subjected to the equivalent fictitious distributed body forces that mathematically replace the lateral inhomogeneities. These fictitious body forces have the same effects as the existence of lateral inhomogeneities and can be evaluated as a function of the inhomogeneity parameters and the mean wave fleld. The explicit expressions for the responses in both the mean and the scattered wave fields are derived with the aid of the integral transform approach and wave propagation analysis.

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