Patent ID: 6844847

Claim:
Process for determining a sought-after orientation of a mobile, using two antennas for receiving radio signals emanating from positioning satellites, which antennas are placed at two fixed points A, B of the mobile, the two points being separated by a known fixed distance D, comprising: periodically determining a set of 2p pseudo-distances, p pseudo distances between each antenna and p satellites; delivering the pseudo-distances to a position calculating facility; and calculating, by the position calculating facility, a relative position of the point A with respect to the point B based on the pseudo-distances and an estimated position of the point A with respect to the point B, wherein, for a given set of 2p pseudo-distances received by the calculating facility, the calculating of relative position comprises: performing n successive calculations (n>1) of relative position of the point A, respectively involving n initial estimated positions all situated at a same distance D from the point B but corresponding to n different orientations about the point B, the n calculations delivering n calculated positions of the point A, calculating distances between each calculated position and the point B, selecting a calculated position such that a discrepancy between the corresponding distance and the distance D is less than a specified threshold, wherein the selected position is the relative position, whereby the direction of a vector linking point B to the selected calculated position represents the sought-after orientation.