Le Contenu électronique total ou Total electron content (TEC) est une description quantitative de l'ionosphère terrestre. Il s'exprime en unité d'électrons présents sur un mètre carré : 1016 electrons/m² = 1 unité TEC (TECU).
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Total electron content — (or TEC) is an important descriptive quantity for the ionosphere of the Earth. TEC is the total number of electrons present along a path between two points, with units of electrons per square meter, where 1016 electrons/m² = 1 TEC unit (TECU).TEC … Wikipedia
total electron content — visuminis elektronų kiekis statusas T sritis radioelektronika atitikmenys: angl. total electron content vok. Gesamtelektronenanzahl, f rus. общее количество электронов, n; общее содержание электронов, n pranc. contenu électronique total, m … Radioelektronikos terminų žodynas
Total electron content — Der Elektronengehalt (TEC) der Ionosphäre am 12. Februar 2007 um 09:00 UT = 10:00 MEZ Der Total electron content (TEC), zu deutsch etwa Gesamtelektroneninhalt, ist eine Kenngröße der Ionosphäre der Erde. Der TEC ist das… … Deutsch Wikipedia
Electron paramagnetic resonance — (EPR) or electron spin resonance (ESR) spectroscopy is a technique for studying chemical species that have one or more unpaired electrons, such as organic and inorganic free radicals or inorganic complexes possessing a transition metal ion. The… … Wikipedia
Electron beam welding — (EBW) is a fusion welding process in which a beam of high velocity electrons is applied to the materials being joined. The workpieces melt as the kinetic energy of the electrons is transformed into heat upon impact, and the filler metal, if used … Wikipedia
Electron spectroscopy — is an analytical technique to study the electronic structure and its dynamics in atoms and molecules. In general an excitation source such as x rays, electrons, or synchrotron radiation will eject an electron from an inner shell orbital of an… … Wikipedia
contenu électronique total — visuminis elektronų kiekis statusas T sritis radioelektronika atitikmenys: angl. total electron content vok. Gesamtelektronenanzahl, f rus. общее количество электронов, n; общее содержание электронов, n pranc. contenu électronique total, m … Radioelektronikos terminų žodynas
Electron — For other uses, see Electron (disambiguation). Electron Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross shaped target is projected against the tube face at right… … Wikipedia
Minimum total potential energy principle — The principle of minimum total potential energy is a fundamental concept used in physics, chemistry, biology, and engineering. It asserts that a structure or body shall deform or displace to a position that minimizes the total potential energy,… … Wikipedia
Ionosonde — Beziehung von Ionosphäre und Erdatmosphäre Elektronendichte und Ionenzusammensetzung in den oberen Ionosphärenschichten … Deutsch Wikipedia
