The response of a vertical dipole above a conducting earth

An exact representation for the electromagnetic field above a conducting earth is investigated theoretically. The time domain response of a vertical magnetic dipole above a conducting half-space is of a crucial importance in the interpretation of air borne electromagnetic data. The classical approach in finding a solution is to apply Fourier inversion to the formal time harmonic solution, leading to a representation in the form of a double infinite integral.   Keywords: electromagnetic field, anisotropic and isotropic   

The Transient Electromagnetic Field above Atmospheric Surface Duct

The transient electromagnetic field generated by vertical electric dipole in evaluation duct is investigated theoretically. A vertical electric dipole in the surface layer is taken as the source of the electromagnetic field. We determine the electric field strength exactly at some fixed point in the duct layer expansion with time, the image of the primary source permits us to apply the method first for Cagnaird and later extended by De Hoop and Frankena to the cases .Hence, we can give a physically intuitive description of polarization dependence at the time of the electrical field strength. The distinction of different cases where the distances between the receiving and transmitting ends at greater or lesser than the total reflection distance is studied. Keywords: Electromagnetic field, Magnetic dipol

The electric field strength above atmospheric surface duct

The paper presents a method which allows the calculation of the atmospheric distortion of radar pules, provided that the influence of the atmosphere is to transfer the transmitted signal through a duct. The polarization of the primary sources, whose moment varies arbitrarily in time, is chosen in such a way that it allows the exact determination of the electric field strength at some field point above the duct layer. We can determinate the transient behavior of the electric field strength at any distance above the duct. Keywords: Electromagnetic field; Atmospheric surface duc

The Transient Electromagnetic Field above Atmospheric Surface Duct

The transient electromagnetic field generated by vertical electric dipole in evaluation duct is investigated theoretically. A vertical electric dipole in the surface layer is taken as the source of the electromagnetic field. We determine the electric field strength exactly at some fixed point in the duct layer expansion with time, the image of the primary source permits us to apply the method first for Cagnaird and later extended by De Hoop and Frankena to the cases .Hence, we can give a physically intuitive description of polarization dependence at the time of the electrical field strength. The distinction of different cases where the distances between the receiving and transmitting ends at greater or lesser than the total reflection distance is studied. Keywords: Electromagnetic field, Magnetic dipol