Life is what happens to you while you're busy making other plans.
你下班之後都在幹嘛?
Monday, January 28, 2013
衛星定位系統
GPS: 美國
GLONASS: 俄羅斯
GNSS: 中國(北斗)
GNSS
優點: 中國政府力推，商機大，
缺點: 衛星數少，開機無法立即定位，隧道、地下室無訊號。
No comments:
Post a Comment
Newer Post
Older Post
Home
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment