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Adaptive Calibration Technology in Digital Compasses and Inertial Systems

Summary: Conventional digital magnetic compasses require a complex and cumbersome “in-field” calibration process. This calibration, commonly referred to as the “Kabuki Dance”, is not embraced by most users including the military and is often performed improperly, incompletely, or sometimes not at all. This results in diminished sensor performance and poor overall accuracy, in targeting and […]

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In-Field Calibration

Inertial systems do not recalibrate on their own if the magnetic environment changes. The magnetic environment is unpredictable and depends on so many factors that it would not be practical to have the inertial system perform recalibrations continuously during operation. If the inertial system calibration is performed in a poor magnetic environment, the inertial system measurements will be poor.

Operational Compensation Cosiderations

Operational Compensation Considerations

The operational environment of the device will present a wide variety of magnetic anomalies that must be considered. Traditional inertial system compensation procedures cannot predict or correct for external environmental magnetic disturbances. The operational environment will include local magnetic disturbances occurring naturally and from manmade objects.

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