EPO™ (Extended Prediction Orbit) data service, world leading technology for supporting 7/14-days orbit prediction to customers. Need occasional download from EPO server.

The AGPS(EPOTM) supply the predicated Extended Prediction Orbit data to speed TTFF, users can download the EPO data to GPS engine from the FTP server by internet or wireless network, the GPS engine will use the EPO data to assist position calculation when the navigation information of satellites are not enough or weak signal zone.