![]() By setting different observation times and locations, it can be seen that the Sun path changes with seasons and latitudes. The user can record the Sun path and the data of observation date, time, longitude, and latitude using the celestial hemisphere and the pole shadow on the system. When holding the mobile device toward the sky, the screen will show the virtual Sun at the same position as that of the real Sun. ![]() The orientation and elevation of the Sun can be calculated by the system according to the user’s location and local time to simulate the Sun path. ![]() This study uses the augmented reality technology and sensor functions of GPS, electronic compass, and three-axis accelerometer on mobile devices to develop a Sun path observation system for applications in astronomy education.
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