• read_how_word : gps_navdata_impl.h
• read_subframe : gps_navdata_impl.h
• read_tlm_word : gps_navdata_impl.h
• search_preamble : gps_navdata_impl.h
• state_start_search : gps_despread_impl.h
• state_track : gps_despread_impl.h
• state_wait_search : gps_despread_impl.h