Patent ID: 7551125
Filing Date: 2009-06-23
Classification: G01S

Abstract:
1. A terminal apparatus for positioning based on satellite signals from positioning satellites, the terminal apparatus comprising: an external signal receiving section that receives an external signal that is generated at predetermined time intervals measured by times of the positioning satellites; a transmitting time information receiving section that receives transmitting time information relating to the external signal; a terminal clocking section that has a time error with respect to the times of the positioning satellites; a terminal signal generating section that generates a terminal signal at the predetermined time intervals measured by the terminal clocking section; a clock generating section that generates a predetermined number of clocks per unit time; a clock number information generating section that generates clock number information that indicates the number of clocks generated by the clock generating section between reception of the external signal and generation of the terminal signal; and a time information generating section that generates generating time information relating to the terminal signal based on the clock number information and the transmitting time information, the clock number information generating section starting operation of the clock generating section when the external signal is received, and stopping operation of the clock generating section when the terminal signal is generated, or starting operation of the clock generating section when the terminal signal is generated, and stopping operation of the clock generating section when the external signal is received.