Abstract: A system for determining the angular spin position of a second object (1) spinning about an axis. A first object (7) emits electromagnetic waves. The second object (1) is provided with directional receiving antenna means (10) and with a receiving system (13) which, using the receiving antenna means (10), process in combination the carrier waves received to obtain said angular spin position. The received signals comprise at least one polarized first carrier wave and a second carrier wave which comprises phase information of the first carrier wave.

Abstract: System for determining the angular spin position of an object (1) spinning about an axis situated within certain limits near the surface (2) of a celestial body. The system is provided with means (4, 5, 6) for generating at least one carrier wave (7, 8) reaching as far as the surroundings of the object (1) and up to and interfering with the surface (2). The system is further provided with directional receiving antenna means (16) fitted to the object (1) and a receiving system (19) linked thereto for determining the angular spin position of the object (1) with respect to the surface (2) on the basis of the angular spin position of the object (1) with respect to the polarization direction of the carrier wave (7, 8).