Download or read book Numerical Results for VLF Mode Conversion in the Earth Ionosphere Waveguide written by Richard A. Pappert and published by . This book was released on 1971 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical results are presented for several mode conversion models which allow for the inhomogeneity and anisotropy of the ionosphere. It is concluded that reflections associated with propagation across the terminator do not significantly affect mode conversion. It is shown that significant departure between mode conversion and WKB mode sums can occur when propagating across the terminator even for transition thicknesses as great as 1000 km. Numerical results are compared with the experimental modeling results of the American Nucleonics Corporation. (Author).
Download or read book Mode Conversion in the Earth ionosphere Waveguide written by James R. Wait and published by . This book was released on 1962 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mode Calculations for VLF Propagation in the Earth ionosphere Waveguide written by Kenneth P. Spies and published by . This book was released on 1961 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book VLF Mode Calculations for Propagation Across a Land sea Boundary in the Earth ionosphere Waveguide written by James R. Wait and published by . This book was released on 1968 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a rather idealized ionospheric model, the conversion of VLF waveguide modes is considered for a discontinuity in the earth's surface properties. The method is based principally on modal analysis,although the connection with an earlier integral equation formulation is demonstrated. Extensive numerical results for the modal parameters and the conversion coefficients are given. Taken together, it is believed that the results may be employed for the quantitative interpretation of observed data and for the prediction of expected fields over rather complicated mixed land/sea paths at VLF.
Download or read book VLF Mode Calculations for Propagation Across a Land sea Boundary in the Earth ionosphere Waveguide written by James R. Wait and published by . This book was released on 1968 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calculated Mode Conversion Coefficients for Graded Height Change in the Earth ionosphere Waveguide at VLF written by Kenneth P. Spies and published by . This book was released on 1968 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a previous formulation, calculations are carried out for the modal conversion coefficients which arise in VLF waveguide propagation in an idealized transition between day and night. A sharply bounded isotropic ionosphere is employed and the transition region is approximated by a finite number of uniform sections of equal length. The relevance of the results to experimental data is discussed briefly. It is indicated that the observed conversion between modes of order one and two are consistent with the calculated results if the transition length for sunrise is of the order of 500 km.
Download or read book A Simplified Mode Conversion Program for VLF Propagation in the Earth Ionosphere Waveguide written by Richard A. Pappert and published by . This book was released on 1974 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a variation of an earlier mode conversion program for numerically determining mode conversion coefficients and mode sums for a waveguide which is inhomogeneous along the direction of propagation (invariance normal to the transmitter receiver line is assumed and reflections due to the horizontal inhomogeneity are neglected). Although somewhat more approximate than the earlier program the present version has the advantage of not requiring a full wave fields program for the height gain calculations and can be implemented with about the same ease as a WKB program. It has one advantage over the WKB formulation and that is that mode numbering along the horizontal inhomogeneity is immaterial. The mode conversion program will yield mode conversion coefficients and a mode sum plot for ground based vertical dipole excitation of the vertical electric field at the ground as a function of distance from the transmitter. Since the mode conversion coefficients are independent of transmitter terminator distance, allowance has also been made for incrementing the latter distance and plotting mode sums for the incremented distances.
Download or read book Calculated Mode Conversion Coefficients for a Graded Height Change in the Earth ionosphere Waveguide at VLF by Kenneth P Spies and James R Wait written by Kenneth P. Spies and published by . This book was released on 1968 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ESSA Technical Report ERL written by United States. Environmental Science Services Administration and published by . This book was released on 1968 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book The United States Department of Commerce Publications Catalog and Index Supplement written by United States. Dept. of Commerce and published by . This book was released on 1967 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Department of Commerce Publications written by United States. Department of Commerce. Office of Publications and published by . This book was released on 1968 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mode Conversion and Single Mode Excitation in the Earth Ionosphere Waveguide with Arbitrary Terrestrial Magnetic Field written by Ernst Ledinegg and published by . This book was released on 1975 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present Final Report contains the continuation and extension of investigations on the propagation of electromagnetic VLF waves in polar regions. The extension considered in this report concerns mainly the terrestrial magnetic field. Part I is devoted to general theoretical considerations. It deals with the derivation of a fictitious surface impedance of the plane ionospheric boundary which mimics the influence of the ionosphere on wave propagation through the atmosphere. In Part II the surface impedance derived in Part I is applied to two waveguide models, the plane two-dimensional and the cylindrical model. In Part III the possibilities for suppressing or favouring the excitation of certain modes in the earth-ionosphere waveguide by a suitable antenna array are discussed.
Download or read book Publications United States National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1960 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electromagnetic Waves in Stratified Media written by James R. Wait and published by Elsevier. This book was released on 2013-10-22 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Series of Monographs in Electromagnetic Waves, Volume 3: Electromagnetic Waves in Stratified Media provides information pertinent to the electromagnetic waves in media whose properties differ in one particular direction. This book discusses the important feature of the waves that enables communications at global distances. Organized into 13 chapters, this volume begins with an overview of the general analysis for the electromagnetic response of a plane stratified medium comprising of any number of parallel homogeneous layers. This text then explains the reflection of electromagnetic waves from planar stratified media. Other chapters consider the oblique reflection of plane electromagnetic waves from a continuously stratified medium. This book discusses as well the fundamental theory of wave propagation around a sphere. The final chapter deals with the theory of propagation in a spherically stratified medium. This book is a valuable resource for electrical engineers, scientists, and research workers.
Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1966 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1970 with total page 1348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
