References for this Work

Here are a few background on-line and print referrences.

Taking the Earth's Magnetic Pulse: by Shawn Carlson; Amateur Scientist, Scientific American , January 1999; Society for Amateur Scientists
An Automated Precision Magnetometer: by Shawn Carlson; Amateur Scientist, Scientific American , March 2000; Society for Amateur Scientists
How to build a Small, Cheap, Easy-to-Build Supersensitive Magnetometer: by Roger Baker; December 1998
Introduction to Geomagnetic Fields: by Wallace H. Campbell; Cambridge University Press, 1997; ISBN: 0-521-57193-6
The Magnetic Measurements Handbook: by J.M. Janicke; Magnetic Research, Inc., 1998
Feedback Control Systems, 4^th edition: by Charles L. Phillips & Royce D. Harbor; Prentice Hall, Inc., 2000; ISBN: 0-130-848090-6
Control System Design Guide: by George Ellis; Academic Press, 1991; ISBN: 0-12-237470-3
Digital Filters, 3^rd edition: by Richard W. Hamming; Dover Publications, Inc., 1998; ISBN: 0-486-65088-X