| Propagation Effects of ECM Resistant Systems in Communication and Navigation |
AUG 1982 |
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| Authors:
H. J. Albrecht; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)
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 | The characteristics of HF radar echoes reflected from ionization irregularities aligned along the lines of force of the earth's magnetic field are presented. Utilizing experimental radar-ionospheric clutter data acquired at frequencies between HF and UHF, an analysis is made of the amplitude, the cross- sectional area and the angular extent statistics of HF field-aligned echoes. The Doppler frequency variation, the frequency of occurrence and the diurnal and seasonal variation of ... |
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| Propagation Effects of ECM Resistant Systems in Communication and Naviation. |
AUG 1982 |
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| Authors:
H. J. Albrecht; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)
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| These Proceedings consist of the unclassified papers presented at the Electromagnetic Wave Propagation Panel Meeting on Propagation Effects of ECM Resistant Systems in Communication and Navigation held in Copenhagen, Denmark, 24-28 May, 1982. There were 28 papers presented divided as follows. Seven on propagation limitations to modern systems, five on adaptation of signal characteristics to propagation features, three on propagation effects in typical scenarios of electronic warfare, and thirteen on ... |
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| General Review of EM Spectrum Characteristics in Tactical Applications. |
APR 1982 |
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| Authors:
H. J. Albrecht; FORSCHUNGSGESELLSCHAFT FUER ANGEWANDTE NATURWISSENSCHAFTEN E V KARLSRUHE (GERMANY F R)*
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| Characteristics of propagation media may have a more or less decisive influence upon the performance of systems used in any environment, and thus also in tactical applications. Following a general introduction to the subject of atmospheric propagation media and their effects, this review summarizes those typically encountered in a tactical environment. In order to lead to and to supplement a more detailed treatment of particularly representative propagation conditions, the review ... |
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| Propagation Effects in Space/Earth Paths. |
AUG 1980 |
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| Authors:
H. J. Albrecht; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)
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| Contents: General Tropospheric Effects, Experimental Data of SHF/EHF Paths, Remote Sensing, General Ionospheric Dispersion Effects, New Data on Ionospheric Irregularities, and Propagation Limitations in Systems. |
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| EM Propagation Characteristics of Surface Materials and Interface Aspects. |
JUN 1977 |
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| Authors:
H. J. Albrecht; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (FRANCE)
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| In the field of electromagnetic wave propagation, essential limiting conditions may be represented by characteristics and behavior of boundaries of the propagation environment. The performance of propagation paths may depend significantly upon variations in such surface properties. A Specialist's Meeting was particularly concerned with surface characteristics and accounted for the increasing importance of appropriate parameters for a number of modern fields of research and engineering applications, such as remote sensing ... |
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| Artificial Modification of Propagation Media. |
JAN 1977 |
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| Authors:
H. J. Albrecht; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (FRANCE)
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| Contents: Modification of Non-Ionized Media; Modification of Ionized Media by EM Waves; and Modification of Ionized Media by Chemical Substances. |
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