Double sun dial with first and second pointer arranged at angle

摘要

The sun-dial includes a first group of hour lines which cross the date lines which is computed for a determined degree of latitude on the globe, depending on the inclination of the first pointer to the vertical. A second group of hour lines cross the date lines, and is computed for a determined degree of latitude, depending on the inclination of the second pointer to the vertical.A mean local time (MOZ) is indicated on the scale surface. The first pointer is a polar indicator, which is aligned in a direction parallel to the rotational axis of the Earth. The second pointer is a azimuth pointer, which stands vertical to the sun dial surface.