GPS receiver and GPS reception method

A GPS receiver, comprising:

• an antenna for receiving a signal transmitted from a GPS satellite;
• a GPS block including a frequency oscillator for generating a frequency and operable to use the frequency from said frequency oscillator to read orbit information placed in the signal in synchronism with the signal frequency from said GPS satellite and place said GPS block itself into a standby mode;
• and
• a GPS control block having a timer function for rendering said GPS block, after being placed into the standby mode, into an activated mode based on the timer function after a standby time determined with a variation of the oscillation frequency by said frequency oscillator taken into consideration passes.

A GPS reception method for a GPS receiver, comprising the steps of:

• receiving a hierarchical navigation message from each of a plurality of GPS satellites;
• storing the received navigation messages into a memory;
• repeating startup and standby of said GPS receiver within a predetermined time to perform position measurement of said GPS receiver from said GPS satellites to update the navigation messages stored in said memory;
• and
• outputting, immediately after power supply to said GPS receiver is made available by a user of said GPS receiver, a current position of said GPS receiver based on the navigation messages stored in said memory without performing reception of the navigation message from any of the GPS satellites.