Patent ID: 8593346

Claim:
A positioning apparatus having a GPS function receiving a satellite signal from a GPS satellite and a GLONASS function receiving a satellite signal from a GLONASS satellite, the positioning apparatus comprising: a local oscillator that includes a crystal oscillator, the local oscillator generating an oscillation frequency using the crystal oscillator, wherein the GPS function demodulates the satellite signal with the oscillation frequency to execute a positioning, and the GLONASS function demodulates the satellite signal with the oscillation frequency to execute a positioning; and a positioning computation section configured to compute an offset frequency relative to a reference frequency of the crystal oscillator based on position information, satellite position information acquired from a satellite signal of a GPS satellite, and a velocity vector acquired from a satellite signal of a GPS satellite, configured to acquire a satellite signal from the GLONASS satellite using the oscillation frequency of the local oscillator, the oscillation frequency being generated based on (i) the reference frequency and (ii) the computed offset frequency, and configured to execute a positioning using the GPS function and the GLONASS function.