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Electromagnetic Depth Soundings by L L Vanyan (Paperback / softback, 2012)

About this product

About this product

Product Information

10.------------------------, 10.------------------------. N:: IE w ' '0.1 \ 0 M z SIDE VIEW PLAN VIEW 0.01 LI --'---'---LLL-'---LLLlI -L--- ---LLL..ll..L.LJ'-': ';;' 0.01 1 100 10 100 fr Fig. 1. The behavior of the magnetic and electric fields from a vertical magnetic dipole source at the surface of the earth (after Wait [1951,1955]). earth, the experimental curve so plotted should have the same shape as a portion of the ap propriate theoretical curve, but with the ordinates and abscissas shifted by an amount dependent on the resistivity. The conductivity can be determined from the amount of shift between the field data and the theoretical curve. A detailed description of the curve matching procedure is found in a text by Keller and Frischknecht (1966). The curve matching procedure, though used, has several disadvantages. Measurements must be made over a diagstic portion of the theoretical curve, one in which there is some curvature, so that the amount of shift required to make a match can be determined uniquely. This means that the approximate conductivity of the earth must be kwn when measurements are made. Secondly, determination of a single value of conductivity requires measurements made over a wide range of frequencies. This would appear to be wasteful of data, inasmuch as the equations indicate that a single measurement at a single frequency should be eugh to de termine conductivity.

Product Identifiers

Publisher
Springer
ISBN-10
1468406728
ISBN-13
9781468406726
eBay Product ID (ePID)
189452808

Product Key Features

Author
L L Vanyan
Format
Paperback / Softback, Trade Paperback (US) ,Unsewn / Adhesive Bound
Language
English
Subject
Gardening
Type
Textbook

Dimensions

Weight
730g
Height
279mm
Width
210mm

Additional Product Features

Spine
17mm
Content Note
Black & White Illustrations, Bibliography
Date of Publication
04/04/2012
Genre
Gardening
Country of Publication
United States

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