Features Using The Positional Indication Of The Sun - Campanola CAN18 Instruction Manual

Features using the positional indication of the Sun

* The dots on the analemma on the 24-hour dial which are numbered from 1.1 to 12.1 show the
positions of the Sun at the first day of each month (based on noon of the universal time in an
average year). The nearest point to the watch center on the analemma represents the position of
the Sun at the winter solstice and the farthest point shows that at the summer solstice. The two
nodes of the analemma and the celestial equator (an arc crossing the middle of the analemma)
show the positions of the Sun at the vernal and autumnal equinoxes.
• Indication feature of direction and altitude of the Sun
Azimuth and altitude lines at latitude 35° N (at every 15°) and direction signs are
drawn on the transparent dial and you can find the direction and altitude of the
Sun all through the year by using them and the analemma on the 24-hour dial.
• Sunrise/sunset determination feature
The sunrise/sunset line on the transparent dial shows the true altitude of the
Sun (approx. −0.84°) when light from upper edge of the Sun (at the average
distance in 35° N) reaches the horizon through the atmosphere. The position
of the Sun of the day on the analemma is overlapped by the sunrise/sunset
line at the time of sunrise/sunset. It is the day while the position of the Sun is
above the sunrise/sunset line; It is the night while it is below the line.
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