Abstract
The author discusses methods used to compensate for a land vehicle's magnetic signature and gives results obtained with various types of vehicles in several world locations. Advantages and disadvantages of pendulous mounting are considered and vehicle magnetic changes caused by driving in areas of extremely strong magnetic fields, such as those generated by DC-powered trains, are discussed. It is suggested that dead-reckoning sensors will be needed on land because of the line-of-sight characteristics of GPS (Global Positioning System) and the difficulty land vehicles have in operating with as many as four satellites constantly in view. Flux gate magnetic sensors will provide a reliable means of measuring heading in many areas where vehicle navigation and tracking needs exist.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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