Exploration Geophysics - Volume 16, Issue 1, 1985
Volume 16, Issue 1, 1985
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Magnetic Exploration Models Incorporating Remanence, Demagnetization and Anisotropy: HP 41C Handheld Computer Algorithms
More LessAuthors D. W. Emerson, D. A. Clark and S. J. SaulHandheld computer (HP 41C) algorithms are presented for basic and advanced magnetic exploration models along principal profiles. The thirteen models are: monopole, 2D line of poles, sheet of poles, dipole, 2D line of dipoles, 2D horizontal sheet of dipoles, 2D dipping thin sheet, 2D dipping thick sheet, 2D sloping step, 2D body with polygonal cross section, prolate and oblate ellipsoids of revolution, 2D elliptic cylinder, vertical rectangular prism. Key diagrams, program useage instructions, worked numerical example, program listing and register contents are given for each model. Induction, remanence, demagnetization and susceptibility anisotropy effects are calculated. The vertical circular and annular cylinders are treated for the cases of induction and remanence.
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ASEG-GDF: The ASEG Standard for Digital Transfer of Geophysical Data
More LessAuthors C. N. G. Dampney, G. Pilkington and S. J. PrattThe ASEG has developed an application-independent standard for the transfer of geophysical data between different computers. This Standard has been termed ASEG-GDF which is an abbreviation for the ASEG General Data Format. An important feature of ASEG-GDF is that is conforms to both the Standards Association of Australia (SAA) and International Standards Organisation (ISO) standards for the transfer of data via magnetic tape.
The most significant aspect of this Standard is its ability to define the contents of magnetic tape in a manner which is not constrained by any particular geophysical application. Thus it is possible for different State and Federal Governments to impose their various reporting requirements, on which tapes can still be read by the same computer program.
As part of the development of this Standard, the ASEG has developed a FORTRAN-77 implementation for reading and writing magnetic tapes in ASEG-GDF format.
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