Geomagnetic Observatory and Survey Practice

ISBN-13: 9789027719089 / Angielski / Twarda / 1985 / 240 str.

W. F. Stuart

Opis

This issue is a collection of the papers read at the 'Workshop on Geomagnetic Observatory and Survey Practice' held during the XIVth General Assembly of IUGG (the International Union of Geology and Geophysics) in Hamburg, August 1983, sponsored by Division V of the International Association of Geomagnetism and Aeronomy (IAGA). The papers represent a snapshot taken at a very important time in the history of Geomagnetism and of the sciences which depend on measurements of one kind or another of the Earth's magnetic field. Research science now demands a much greater amount of information to be prepared and immediately made available to the scientific user. Experimental measurements are now required to be reduced, selected and made ready as information which can be recorded as data on magnetic tape in the form required for direct incorporation into the analytical programmes whiCh individual researchers run on digital computers. Computing has reduced the lead time between when observations are made and when they are required by researchers. Many scientific programmes, particularly those related to Solar-terrestrial geophysics, need data to be analysed as near as possible to the time it is recorded. In Geomagnetism these pressures apply to field variations where satellite based geophysical experiments require high resolution of the fine structure of external disturbance fields, and also to field mapping on a global and local scale where the demand for increased accuracy calls for better absolute observations and more frequent surveys.

Spis treści

Absolute Measurement of D by Means of a Proton Magnetometer.- Portable Magnetometer Theodolite with Fluxgate Sensor for Earth’s Magnetic Field Component Measurements.- Acquisition and Primary Processing of Geomagnetic Pulsations in Real Time Operation by Microcomputer.- The Recording of Pc1 Geomagnetic Pulsations Using a Microcomputer Preprocessing System.- Magnetic Mapping of Slovakia for the Epoch 1980.5.- Geomagnetic Absolute Measurements with a Nuclear Resonance Theodolite at the Adolf Schmidt Observatory in Niemegk.- Aeromagnetic Surveys in the Seas Around Japan in 1980.- An Automatic Audio-Magnetotelluric Equipment, Controlled by Microprocessor, for the Telesurveillance of the Volcano Momotombo (Nicaragua).- The Eiscat-Magnetometer Cross.- An Intelligent Digital Magnetic Recording System (Dimars).- On the Reduction of Time Variations for Geomagnetic Repeat Station Measurements.- One Year Experience with the CMVS 2 Magnetic Variation Station.- Automatic Digital Recording of Geomagnetic Elements by Means of a Proton Precession Magnetometer.- Comparison of Standard and Digital Observation at the Geomagnetic Adolf Schmidt Observatory Niemegk.- Improved Kakioka Automatic Standard Magnetometer (KASMMER).- Long-Term Stability of a Torque-Balance Variometer with Photoelectric Converters in Observatory Practice.- Experience of Geomagnetic Field Recording with a Fluxgate Magnetometer Having a Bridge Sensor.- The Digital Recording System Operated at the U.K. Magnetic Observatories.- Geomagnetic Measurements Made on the Moving Ice Shelf at Halley, Antartica.- Proposed Major Format Change to Geomagnetic Activity Reports and Forecasts Produced by the SESC, Boulder, Colorado, U.S.A..- About Digital Alternative to the Kp-Index.- Derivation of K-Indices Using Magnetograms Constructued from Digital Data.- The Generation of K Indices from Digitally Recorded Magnetic Data.- Announcement.