Measurement device on the time difference from individual GPS satellite and selectively synchronizing method thereof

摘要

PURPOSE: A device for measuring time difference with an individual GPS satellite and a selectively synchronizing method thereof are provided to improve the precision of received virtual data. CONSTITUTION: A GPS engine(100) successively generates a second signal synchronized based on GPS time data from a plurality of GPS satellites. A local oscillating unit(200) generates the second signal according to the number of channels of the GPS engine unit. A time different interval counting unit(300) successively receives second signals from the plurality of channels and the local oscillation unit and counts the time difference interval according to the time difference between the second signals. A control unit(500) excludes the time difference data from the GPS satellite out of the preset range and synchronizes the clock of the local oscillation unit according to a compensation value from the remaining GPS satellite.