Patent ID: 7535418

Claim:
A terminal apparatus configured to receive position related information signals from a plurality of SPS satellites, the terminal apparatus comprising: a control unit determining a first satellite-to-be-acquired from among the plurality of SPS satellites, and generating a first initial search frequency for the first satellite-to-be- acquired; and a positioning device having a plurality of search units, the positioning device acquiring the first satellite-to-be-acquired by using the plurality of search units, the control unit determining first drift information, the first drift information being a difference between the first initial search frequency and the frequency acquiring the first satellite-to-be-acquired, the control unit determining a second satellite-to-be-acquired from among the plurality of SPS satellites excluding the first satellite-to-be-acquired, the control unit generating a second initial search frequency for the second satellite- to-be-acquired, the positioning device acquiring the second satellite-to-be-acquired by using some of the plurality of search units, the control unit determining second drift information, the second drift information being difference between the second initial search frequency and the frequency acquiring the second satellite-to-be-acquired, the control unit verifying the first drift information by comparing the first and second drift information, when the first and second drift information is substantially equal, the control unit generating corrected search frequency by using one of the first and second drift information for at least some of the plurality of SPS satellites excluding the first and second satellites-to- be-acquired, the positioning device acquiring at least another position information satellite by using the corresponding corrected search frequency.