Geophysics III/Geophysik III
Part III/Teil III
Published on 1. January 1971
Book
Hardback
VIII, 558 pages
978-3-540-05570-9 (ISBN)
Description
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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Series
Edition
Multilingual edition
Language
English
French
German
Place of publication
Heidelberg
Germany
Publishing group
Springer Berlin
Target group
Professional and scholarly
Research
Edition type
Multilingual edition
Illustrations
28
28 s/w Abbildungen
28 black & white illustrations, biography
Weight
1300 gr
ISBN-13
978-3-540-05570-9 (9783540055709)
DOI
10.1007/978-3-642-80639-1
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01/2012
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Content
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.- I. General description.- II. Processes and problems.- 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.- I. Überblick und Grundlagen.- II. Definition und praktische Bedeutung der aus K abgeleiteten lokalen und planetarischen 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.- I. Kompensierende Magnetometer.- II. Andere Verfahren.- B. Komponentenmessung mit Hilfe von Induktivitäten.- I. Induktionsspulen als Meßelement.- II. Mit magnetischen Wechselfeldern ausgesteuerte hochpermeable Kerne als Meßelemente.- C. Atomphysikalische Feld-Meßmethoden.- I. Kernpräzessionsmagnetometer zur Bestimmung der Totalintensität.- II. Magnetometer mit optisch gepumpten Gasen und Dämpfen zur Bestimmung der Totalintensität.- III. Komponentenmessung mit Totalintensitäts-Magnetometern.- IV. Andere Methoden.- D. Informationsverarbeitung im Geomagnetismus.- Three-Component Airborne Magnetometers.- Aeromagnetic Surveying with the Fluxgate Magnetometer.- I. Fluxgate magnetometers.- a) Basic fluxgate magnetometer.- b) Special modifications.- c) Associated equipment.- II. Field survey technique.- a) Operation of airborne magnetometers.- b) Compilation of field data.- c) Interpretation of results.- 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).