Patent ID: 8179308
Filing Date: 2012-05-15
Classification: G01S

Abstract:
1. A method for optimizing the accuracy of position determination or for reducing the integrity risk of a global navigation satellite receiver in a global satellite navigation system having a plurality of satellites, said method comprising: determining, by the global navigation satellite receiver for at least one satellite that is visible to the receiver, a deviation error as a function of geometric orientation of the satellite relative to the receiver, and of at least one system parameter; determining, by the global navigation satellite receiver, the deviation error on the basis of an additional deviation error generated by an error projection into a coordinate system of the receiver, wherein a first or a second value of said at least one system parameter, whichever is smaller, is used to determine the deviation error; determining, by the global navigation satellite receiver, the first value for the at least one system parameter using a respective specified parameter value; and determining, by the global navigation satellite receiver, the second value for the at least one system parameter using a modified parameter value which is modified with respect to the specified parameter value in such a way that a lower error in the modified parameter value of the at least one system parameter is accepted as true.