Book contents
- Frontmatter
- Contents
- Introduction
- 1 The Potential
- 2 Consequences of the Potential
- 3 Newtonian Potential
- 4 Magnetic Potential
- 5 Magnetization
- 6 Spherical Harmonic Analysis
- 7 Regional Gravity Fields
- 8 The Geomagnetic Field
- 9 Forward Method
- 10 Inverse Method
- 11 Fourier-Domain Modeling
- 12 Transformations
- Appendix A Review of Vector Calculus
- Appendix B Subroutines
- Appendix C Review of Sampling Theory
- Appendix D Conversion of Units
- Bibliography
- Index
Appendix D - Conversion of Units
Published online by Cambridge University Press: 10 October 2009
- Frontmatter
- Contents
- Introduction
- 1 The Potential
- 2 Consequences of the Potential
- 3 Newtonian Potential
- 4 Magnetic Potential
- 5 Magnetization
- 6 Spherical Harmonic Analysis
- 7 Regional Gravity Fields
- 8 The Geomagnetic Field
- 9 Forward Method
- 10 Inverse Method
- 11 Fourier-Domain Modeling
- 12 Transformations
- Appendix A Review of Vector Calculus
- Appendix B Subroutines
- Appendix C Review of Sampling Theory
- Appendix D Conversion of Units
- Bibliography
- Index
Summary
The only known antidotes to discussions of units are undisturbed silence in a dark room for 15 minutes or a brisk walk in the park.
(Robert F. Butler)Two systems of electromagnetic units are in common usage in the geophysical literature: The venerable cgs system, also known as electromagnetic units (emu), and the more modern and internationally accepted Système Internationale (International System, abbreviated SI). Geophysical journals now require the use of SI units, and for the most part SI units are adhered to in this text. Geophysical journals published prior to 1980, however, employed emu, and even some recently published textbooks (e.g., Butler) continue its usage. Consequently, reading the geophysical literature requires conversion between the two systems, a common source of frustration because the two systems are significantly different.
The following table summarizes these two important systems of units and the conversion factors between them. Additional discussions can be found in textbooks by Panofsky and Phillips, Butler, and the Society of Exploration Geophysicists, and in papers by Shive, Payne, and Moskowitz.
- Type
- Chapter
- Information
- Potential Theory in Gravity and Magnetic Applications , pp. 417 - 418Publisher: Cambridge University PressPrint publication year: 1995