Low-frequency fast inhomogeneous plane-wave algorithm (LF-FIPWA)

2003 ◽  
Vol 40 (2) ◽  
pp. 117-122 ◽  
Author(s):  
L.J. Jiang ◽  
W.C. Chew
Keyword(s):  
Plane Wave ◽  
Low Frequency ◽  
Inhomogeneous Plane ◽  
Inhomogeneous Plane Wave

On modeling airborne very low‐frequency measurements

Geophysics ◽  
1989 ◽  
Vol 54 (12) ◽  
pp. 1596-1606 ◽  
Author(s):  
Ari Poikonen ◽  
Ilkka Suppala
Keyword(s):  
Plane Wave ◽  
Electric Field ◽  
Numerical Models ◽  
Vertical Component ◽  
Low Frequency ◽  
Primary Field ◽  
Vertical Electric Field ◽  
Inhomogeneous Plane ◽  
Inhomogeneous Plane Wave ◽  
Attenuation Characteristics

Numerical models employed in ground VLF modeling use a normally incident (homogeneous) plane wave as a primary field. We show that these models are not directly applicable to modeling the impedance and wavetilt in the air, quantities needed in the interpretation of airborne VLF resistivity measurements. Instead, the primary field must be replaced by an inhomogeneous plane wave incident on the ground at an angle close to 90 degrees in order to provide the correct behavior of the apparent resistivities in the air. VLF magnetic polarization parameters, however, can be modeled in the air using the normally incident plane wave as a primary field. We also show that the plane‐wave analysis provides the same attenuation characteristics for the wavetilt in the air that is predicted by the Norton’s surface wave obtained by using the vertical electric dipole as a source. Use of the inhomogeneous plane wave introduces the vertical component of the electric field in the model. A 2‐D modeling technique based on the network solution is used to demonstrate the effects of the vertical electric field in the H‐polarization case. The vertical electric field generates charge distributions on the horizontal boundaries of conductors. In the case of a vertical sheet‐like conductor, these charges cause a slight asymmetry in apparent‐resistivity anomalies. Attenuation characteristics of various VLF anomalies with altitude are also presented. The H‐polarization anomalies attenuate much more rapidly in the air than those for E‐polarization due to the difference in the dominating source of EM fields in each polarization.

The diffraction of an inhomogeneous plane wave by a wedge

Radio Science ◽  
1996 ◽  
Vol 31 (6) ◽  
pp. 1387-1397 ◽  
Author(s):  
R. G. Kouyoumjian ◽  
G. Manara ◽  
P. Nepa ◽  
B. J. E. Taute
Keyword(s):  
Plane Wave ◽  
Inhomogeneous Plane ◽  
Inhomogeneous Plane Wave

Error analysis of the fast inhomogeneous plane wave algorithm for 2D free-space cases

2003 ◽  
Vol 38 (4) ◽  
pp. 300-304 ◽  
Author(s):  
Shinichiro Ohnuki ◽  
Weng Cho Chew
Keyword(s):  
Plane Wave ◽  
Error Analysis ◽  
Free Space ◽  
Inhomogeneous Plane ◽  
Inhomogeneous Plane Wave

Interaction of an atom with an inhomogeneous plane wave

1979 ◽  
Vol 22 (3) ◽  
pp. 249-253
Author(s):  
A. A. Kolokolov
Keyword(s):  
Plane Wave ◽  
Inhomogeneous Plane ◽  
Inhomogeneous Plane Wave
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