Patent ID: 7778117
Filing Date: 2010-08-17
Classification: G01S,G04R

Abstract:
1. A time adjustment device comprising: a satellite signal reception unit that receives satellite signals containing satellite time information transmitted from a positioning information satellite; a time information generating unit that generates time information; and a time information adjustment unit that adjusts the time information based on the satellite time information received by the satellite signal reception unit; an indoor/outdoor determination unit that decides if the time adjustment device is indoors or outdoors based on the power generated by photoelectric conversion; a reception range information storage unit that stores reception range information defining the reception range for receiving positioning information satellite signals based on a difference in time adjustment device environment information, the reception range information including indoor reception range information defining the frequency range to scan when the time adjustment device is indoors, and outdoor reception range information defining the frequency range to scan when the time adjustment device is outdoors; and a positioning information satellite selection unit that selects the positioning information satellite from which the satellite time information is received based on variation in the transmission frequency of the satellite signals transmitted from the positioning information satellite and the reception range information.