POSITIONING SURVEY SYSTEM

摘要

A method for reducing the influence of multipath delay on signals in position survey systems using received signals from GPS satellites, wherein the position based constellation of said GPS satellites is periodic with a periodicity of D hour. Computed position vectors are compared to corresponding position vectors as computed D hours earlier. A relative position of less than one mm can be obtained for objects that are less than 1 km apart and with a height difference of less than 20 m.