Japan launched the third satellite in its effort to build a homegrown geolocation system aimed at improving the accuracy of car navigation systems and smartphone maps to mere centimetres. An H-IIA rocket blasted off at about 2:30 pm (0530 GMT) from the Tanegashima space centre in southern Japan, according to the Japan Aerospace Exploration Agency (JAXA). The rocket successfully released the "Michibiki" No.3 satellite about 30 minutes after launch. The launch was initially scheduled last week but was postponed due to a technical glitch. Satellite geolocation systems, initially designed for the US military, now power countless civilian applications, from car navigation to internet browsing on mobile phones.