Patent ID: 6405127
Filing Date: 2002-06-11
Classification: G01S

Abstract:
A method for determining the location of an object using a system, the system including a base station having a known fixed position, a base station receiver configured to receive location data from a first set of satellites, a mobile receiver coupled with the object configured to receive location data from a second set of satellites, with the second set of satellites being a subset of and thus fewer in number than the first set of satellites, and a computer configured to determine the location of the object from the location data, said method comprising the steps of:utilizing the base station receiver to receive base station location data from the first set of satellites; storing the base station location data from the first set of satellites using the computer; utilizing the mobile receiver to receive object location data from the second set of satellites; utilizing the computer and the stored base station location data from the first set of satellites to determine base station location data with respect to the second set of satellites, and a base station position estimate; calculating a positional error in the base station position estimate relative to the known fixed position of the base station; and determining a calculated location of the object using the positional error and the object location data.