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http://dx.doi.org/10.6109/jkiice.2017.21.4.846

Implementation of the Azimuth Correction Device using Astronomical Observation  

Lim, Jin-Kook (2nd Training Squadron, Republic of Korea Navy 2nd Fleet)
Yim, Jae-Hong (Department of Electronics, Electrical and Information Engineering, Korea Maritime and Ocean University)
Abstract
In this paper, we proposed a method to reduce the error of compass by combining the ceiling technique used in the past with modern IT technology. We combined an encoder and the Azimuth Circle for applying an algorithm. The algorithm is able to calculate the true north by using astronomical observation. Finally, we implemented the embedded system possible to indicate various situations and perform calculations. As a result, it isn't only able to calculate the true north with an error of about $0.2^{\circ}$ but also takes less than 5 seconds. Originally, using astronomical observation requires more than 5minutes. So it is analyzed as convenient by solving the problem of taking lots of time. Especially, we present the tolerance less than $0.5^{\circ}$ by the analysis of the existing gyrocompass and the bearing standard of IMO. In conclusion, we clearly confirm that the results of this paper are possible to reduce the error of various compasses in a real world.
Keywords
Celestial Navigation; Magnetic Compass; Azimuth; Error Correction;
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