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This thesis, authored by Niklas Wahlström, investigates alternative techniques for localization using magnetometers and light sensors. The work focuses on applications in traffic surveillance and indoor localization, leveraging magnetometers to detect vehicles and measure magnetic fields induced by stationary objects. Additionally, it explores the use of light sensors to track migrating birds by measuring light intensity and using astronomical calculations to determine location. The research aims to enhance traditional localization methods, offering robust solutions for automation in navigation, security, and animal migration studies. The thesis is intended for academic and professional audiences in electrical engineering and related fields.
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This thesis explores alternative positioning systems for environments where GPS is ineffective, such as indoors and underwater. It focuses on three main scenarios: indoor localization for first responders using a foot-mounted inertial magnetic sensor unit, maritime navigation using radar as a backup to GPS, and underwater positioning using a sensor network. The thesis presents methods to estimate heading indoors using a Kalman filter and gyro measurements, radar-based positioning for naval vessels, and positioning underwater sensors using magnetic disturbances caused by a friendly vessel. The goal is to improve safety and efficiency in scenarios where traditional GPS is unavailable.
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