Patent ID: 7136015
Filing Date: 2006-11-14
Classification: G01C,G01S

Abstract:
1. A satellite positioning apparatus for performing a present position determination based on signals received from a plurality of satellites, the satellite positioning apparatus comprising: a satellite position-determining unit operable to periodically perform positioning of the satellite positioning apparatus based on signals received from a plurality of satellites and to calculate a determined position; a determined position output unit operable to output one of either the determined position and an estimated present position; and a velocity vector calculating unit operable to perform velocity vector calculations based on signals received from the plurality of satellites; wherein after a change in the determined position from a previous determined position that is greater than or equal to a predetermined level, the determined position output unit outputs the estimated present position in place of the determined position until a condition is satisfied, wherein the condition relates to at least a predetermined time period or a predetermined distance; and wherein the estimated present position is based on a position determined by the satellite position-determining unit before the occurrence of the change in the determined position from a previous determined position that is greater than or equal to the predetermined level and a velocity vector calculated by the velocity vector calculating unit before the occurrence of the change in the determined position from a previous determined position that is greater than or equal to the predetermined level.