??????????????????????112?????2018???????????
??10???????????????????????????????????????2020??????
?????????????????????5?????????????????5????????????200????1??2?
????????????????????????????
?ݧ ???
???????????????????A?????????^????????
????????????0.35?28??????2017????5000????90%
5?????ݧ?????????????????????????????????ٵ
???????????????5??480????????4?
???2012????20%????1?????2????????????????1?????
?5???????????????????5?????
??33500?21000?????150019000???????????
????????????????????????
??? ????
??????????????10????????1
?1400???????????????????????
???????????????10010???????????
??????GPS?????????GPS??????????????????
?????????????????????????????10??????
?5??????????????t?????????????
??????????????????????
????????????????????????????1?????0.8?0.9?1????????
????????????????????????????????p??????????
??? ????
????GPS????????????????????
???GPS??GALILEO??GLONASS??????????????????????
???GPS?????????????????????????GPS???
?????????^???????????4???????????????????
??GPS???????????????GPS?????????
??2006????????????????????????????????
??????????????100?????
?????? ??
? ?
??