A device includes: a gyroscope adapted to be mounted to a goniometer, wherein a sensitivity axis of the gyroscope is substantially perpendicular to a rotation axis of the goniometer, wherein the goniometer is adapted to provide at least a first goniometer azimuth reading (A1) at a first azimuthal direction and a second goniometer azimuth reading (A2) at a second azimuthal direction, wherein the gyroscope is adapted to provide at least a first gyroscope angular rate reading (ω1) at the first azimuthal direction and a second gyroscope angular rate reading (ω2) at the second azimuthal direction, wherein the device enables measurement of a tilt angle.
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