Abstract
The paper focuses on vehicle attitude determination by a MEMS-based inertial measurement unit (IMU) comprising magnetometers and one-axis FOG, a multiantenna GNSS receiver, and a log integrated in an integrated orientation and navigation system (IONS) for sea-going ships. IONS algorithms and errors in attitude determination in autonomous mode during long-term GNSS outages are investigated. Results from onboard tests of experimental GPS compass developed by Elektropribor in urban conditions are presented.
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