%0 Journal Article
%T The Fourier Notation of the Geomagnetic Signals Informative Parameters
%A Osvaldo Faggioni
%J Journal of Signal and Information Processing
%P 153-166
%@ 2159-4481
%D 2018
%I Scientific Research Publishing
%R 10.4236/jsip.2018.93009
%X The paper discusses the quantitative definition of the s/n (signal to noise ratio) by means of new computational parameters derived (and computed) by the Fourier analysis. The theme is of great relevance when the geomagnetic observed field has high transient noise and high energy content (<i>i.e.</i>geomagnetic signal interfered by human activity magnetic band) and when the signal analysis action is oriented to the detection of magnetic sources characterized by quasi-punctiform size, low energy level and kinetic mechanical status (<span style=\"white-space:nowrap;\"><i>i.e.</i></span>uw armed terrorist). The paper shows the results obtained introducing two new informative spectral parameters: the informative capability ˇ°<span style=\"font-size:12.8px;white-space:normal;\"><i></i></span><i>C<span style=\"font-size:12.8px;white-space:normal;\"></span></i>ˇ± and the enhanced informative capability ˇ°<span style=\"font-size:12.8px;white-space:normal;\"><i></i></span><i>eC<span style=\"font-size:12.8px;white-space:normal;\"></span></i>ˇ±. These parameters are depending on the comparison of the energy of the target signal with total field energy and they are characteristics of each elementary signal. <span style=\"white-space:nowrap;\"><i></i></span><i>C<span style=\"white-space:nowrap;\"></span></i> classifies the energy of the spectrum in two metrological bands: elementary signal informative energy <span style=\"white-space:nowrap;\"><i></i></span><i>E<sub>I</sub><span style=\"white-space:nowrap;\"></span></i> (band or single signal) and passive energy <span style=\"white-space:nowrap;\"><i></i></span><i>E<sub>P</sub><span style=\"white-space:nowrap;\"></span></i>. This metrological classification of the energy overtakes the concept of noise: each signal is part of the noise band when it is not under observation and becomes out of the band when it is under observation (numerical observation<span style=\"white-space:nowrap;\">ˇú</span>computation). <span style=\"font-size:12.8px;white-space:normal;\"><i></i></span><i>C<span style=\"font-size:12.8px;white-space:normal;\"></span></i> (and <span style=\"font-size:12.8px;white-space:normal;\"><i></i></span><i>eC<span style=\"font-size:12.8px;white-space:normal;\"></span></i>) allows to compute the value of the ˇ°visibilityˇ± of the informative signals in a high energy geomagnetic field (or spectrum). <span style=\"white-space:nowrap;\"><i></i></span><i>C<span style=\"white-space:nowrap;\"></span></i> is a fundamental parameter for the evaluation of the effectiveness of singularity magnetic metrology in the passive
%K Geomatic
%K Informative Signal Analysis
%K Fourier Analysis
%K Geomagnetism
%K Metrology of Singularity
%K Frequency Domain Observations
%K S/N  Manipulation
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=86484