[ntp:questions] GPS

binh tran thanh thanhbinhlqd at gmail.com
Mon Oct 4 14:55:16 UTC 2010


Hello,i'm from Viet Nam
Now i'm using GPS et333
do u can explain for me the meaning (in GPGGA):
- position fix indicator
- hdop
-checksum
-how to know the acurate of GPS's signal




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