Course of the sun’s altitude for middle Europe on the reference latitude: N 49° 0‘ 00‘‘

The course of the sun and therefore the course of shade for shading systems such as awnings is different in each location. The closer the location to the northern and southern tropics, the more vertical the incidence of the sun’s rays. On the mean latitude of middle Europe of 49° 0‘ 00‘‘ north, the angle between the sun and the horizon at midday on June 21 is approximately 64.45°. This angle is also known as the solar angle and forms the basis; in the respective form, for the schematic diagrams on the course of shade shown below.

The reference graphic corresponds to the sun’s altitude course on the 49th parallel


The following graphics relate to the sun’s altitude at midday on June 21 between London and Rome

The shaded area of an awning with 0° incline offers the lowest ratio between incidence and the shaded area.

The above schematic drawing shows that an increase of the shaded area can be achieved by means of the angle of inclination. A maximum shaded area is achieved when the inclination angle is almost vertical to the sun rays.

A maximum shaded area is achieved by combining incline and a VOLANT-PLUS, in this example 1.00 m high. This means that adequate shading is created by the awning and the associated sun protection is also guaranteed later in the year.


  • The projection of an awning does not correspond to the shadowing!
  • The installation height must also be taken into consideration!
  • The incidence is measured in the horizontal awning position (0° incline).

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