Patent ID: 8520473

Claim:
An electronic device comprising: a reception unit that captures a positioning information satellite and receives a satellite signal transmitted from the captured positioning information satellite; a solar panel; and a reception control unit that controls the reception unit, the reception control unit including an evaluation unit that evaluates the reception environment based on power generation by the solar panel, and a mode selection unit that, based on the result from the evaluation unit, selects a time information reception mode for receiving the satellite signal and acquiring time information, or a position and time information reception mode for receiving the satellite signal and acquiring positioning information and time information, and controls operation of the reception unit in the reception mode selected by ode selection unit; wherein the evaluation unit determines if power generation by the solar panel is greater than or equal to a first power generation evaluation threshold value, is less than a second power generation evaluation threshold value that is lower than the first power generation evaluation threshold value, or is less than the first power generation evaluation threshold value and greater than or equal to the second power generation evaluation threshold value; and wherein the mode selection unit selects the position and time information reception mode when the evaluation unit determines power generation is greater than or equal to the first power generation evaluation threshold value, selects the time information reception mode when the evaluation unit determines power generation is less than the first power generation evaluation threshold value and greater than or equal to the second power generation evaluation threshold value, and changes to a mode enabling the user to select the reception mode when the evaluation unit determines power generation is less than the second power generation evaluation threshold value.