Patent ID: 6417800
Filing Date: 2002-07-09
Classification: G01S

Abstract:
A method for determining an error in the reference time (15) of a receiver (MS) in positioning means (S, MS), in which method a code modulated signal transmitted by satellites (SV1-SV4) and formed by an individual code for each satellite (SV1-SV4) is received, in which method the time ({circumflex over (T)}ToTk) of transmission of the signal received from every satellite used in the positioning is determined to be used in the positioning of the satellite, characterized in that to determine a difference between the time ({circumflex over (T)}ToTk) of transmission of the signal and the reference time, positioning is performed, and on the basis of the determined position, an error value (ERR) is calculated, wherein in the method, a minimum point of the error value is searched for by determining the position of the receiver (MS) with at least two different positions of the satellite corresponding to the time of transmission and by calculating the error value (ERR) for said at least two determined positions of the receiver (MS).