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How to monitor a duck's shade situation from a remote location:

By measuring the vertical and horizontal angles of
the sun, a cube can be generated in a 3D CAD modeling
program whose opposite vertices replicate the composite
angle (vector) of the sun's position at any given time
of the day.

The duck awning and the duck dimensions and orientations
are entered into the same database as the sun cube.

By aligning the opposite vertices of the sun cube, one
can see exactly the shade status of the duck.