Geophysics III/Geophysik III

Part III/Teil III
Herausgegeben:Rawer, Karl

• Broschiertes Buch

Produktbeschreibung

Sect. 14. 297 for such slow variations the effect described under 2. above will be by far the most predominant. In fact, the equipment provides a record of the time derivative of the element in question. 6) Records of the time derivatives of magnetic elements can, however, be obtained in a more direct way by recording directly the electromotive force (e. m. f. ) induced in suitably disposed coils by the variations of the geomagnetic field 10, 11. When a coil with the total winding area F is placed with its axis in the direction of a geomagnetic force component the variation of magnetic induction B with time will produce an electromotive force 1 dB 1 dH e=- coveu,uuFdT=- 'oV~,uQf1oFdT (i). )) . !. . =_to-13~ d(B/y) (1). )a) v em! d(tjs) in the coil. The e. mJ. may be amplified and recorded by means of an oscillograph or on a tape recorder. but more often the coil is used in connection with an ordinary galvanometer and the scale value of, for instance the dl1/dt record, will then -in the same way as the scale value of the magnet variometer treated in Subsect. IX - be dependent on the damping factor IX and on TO/T, where To and T are the oscillation periods for the undamped galvanometer and for the magnetic pulsation respectively. The amplitude recorded will be proportional to the amplification factor I, obtained from Eq. (1).

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Produktdetails

• Handbuch der Physik Encyclopedia of Physics 10 / 49 / 3
• Verlag: Springer / Springer Berlin Heidelberg / Springer, Berlin
• Artikelnr. des Verlages: 978-3-642-80641-4
• Softcover reprint of the original 1st edition 1971
• Seitenzahl: 568
• Erscheinungstermin: 4. Januar 2012
• Deutsch, Englisch, Französisch
• Abmessung: 244mm x 170mm x 31mm
• Gewicht: 966g
• ISBN-13: 9783642806414
• ISBN-10: 3642806414
• Artikelnr.: 36121445

Inhaltsangabe

Introductory Remarks.- Morphology of Magnetic Disturbance.- A. General introduction.- B. Normal geomagnetic variation free from disturbance.- C. Characterization of magnetic disturbance.- D. Gross characteristics of geomagnetic disturbance over the world.- E. Sudden commencement of magnetic storms.- F. Average storm-time variation and disturbance-daily variation of geomagnetic field.- G. Development and decay of magnetic storms.- H. Instantaneous and average disturbance field.- I. Geomagnetic bays and other worldwide disturbances of short duration.- J. Geomagnetic pulsations.- K. Inter-relation among geomagnetic disturbance and associated phenomena, and outline of theoretical interpretation.- General references.- Theoretical Aspects of the Worldwide Magnetic Storm Phenomenon.- A. Introduction.- B. The space environment of Earth.- C. The geomagnetic storm.- D. Confinement and compression of the geomagnetic field.- E. Inflation of the geomagnetic field.- F. Historical development.- General references.- Maßzahlen der erdmagnetischen Aktivität.- A. Einleitung.- B. Die Bartelssche Kennziffer K und daraus abgeleitete Maßzahlen.- C. Andere Aktivitätsmaße.- D. Statistische Aussagen der Maßzahlen über Gesetzmäßigkeiten im Auftreten erdmagnetischer Aktivität und deren Ursache.- Literatur.- Classical Methods of Geomagnetic Observations.- A. Geomagnetic observatories and the recording of variations in the geomagnetic elements.- B. Direct determination of the geomagnetic elements.- General references.- Neuere Meßmethoden der Geomagnetik.- A. Komponentenmessung mit Hilfe von Stabmagneten als Meßelemente in Verbindung mit elektronischen Anzeige- und Regelorganen.- B. Komponentenmessung mit Hilfe von Induktivitäten.- C. Atomphysikalische Feld-Meßmethoden.- D.Informationsverarbeitung im Geomagnetismus.- Three-Component Airborne Magnetometers.- Aeromagnetic Surveying with the Fluxgate Magnetometer.- I. Fluxgate magnetometers.- II. Field survey technique.- III. Discussion of advantages and limitations.- Geophysical Applications of High Resolution Magnetometers.- Abstract.- A. Nuclear magnetometers.- B. Ground applications of optical absorption magnetometers.- C. Airborne and satellite applications of optical absorption magnetometers.- Phénomènes T.B.F. d'origine magnétosphérique.- Bibliographie.- Sachverzeichnis (Deutsch-Englisch).- Subject Index (English-German).- Index (Français).