Improving the accuracy of GPS compass for small-sized objects

Abstract

The paper considers determination of attitude parameters, including true heading, by an inte grated orientation and navigation system (IONS) comprising MEMS based inertial measurement unit (IMU) and multiantenna GNSS receiving equipment. IONS generates orientation solution using phase data from two antenna GNSS module with antenna base about the wavelength of the satellite signal at carrier fre quency. The system algorithms and errors are studied. IMU and GNSS antenna base are subjected to modu lating rotation. Effectiveness of using GNSS phase determinations for estimating heading errors with a short rotating antenna base is investigated. The system experimental sample uses IMU based on STIM300 Senso nor MEMS sensors (Norway), navigation and phase measurements by GNSS receivers 1K 181 by Russian Institute of Radionavigation and Time (Russia). The results obtained in bench tests are presented.

A Short-baseline Dual-antenna BDS/MIMU Integrated Navigation System

“…Scholars have made some advancements in the field, for example, Russian researchers integrate rotary GNSS dual antennas and MIMU. The system uses an alternative heading determination algorithm and results show that the orientation error is less than 1° [6][7]. Researchers fro m the Un iversity of New Orleans put forward an IMU/ GPS co mpass, with Kalman -filter fusing data and the compass outputs roll angle whose calculation accuracy is 2.12° [8].…”