| 摘要 |
PURPOSE: A wireless position tracking terminal is provided to select more available information among position tracking information and transmit selected information to a communication terminal by wireless. CONSTITUTION: A GPS receiver(121) receives GPS(Global Positioning System) data from a GPS satellite. An earth magnetism sensor(122) senses azimuth and speed data by earth magnetism. If the GPS data transmitted from the GPS receiver(121) are normal data, a position tracking data selecting unit(123) selects the transmitted GPS data as position tracking data. If the GPS data transmitted from the GPS receiver(121) are abnormal data, the position tracking data selecting unit(123) selects the azimuth and speed data as the position tracking data. A wireless communication unit(124) transmits the position tracking data selected by the position tracking data selecting unit(123) to a communication terminal(128) by a wireless communication scheme.
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