GPS/BD数据帧格式

$GPVTG,138.07,T,,M,0.00,N,0.00,K,A*30 $GPZDA,030550.000,15,07,2018,00,00*5D $GPTXT,01,01,01,ANTENNA OK*35 $GPGGA,030551.000,3906.2586,N,11720.3131,E,1,11,0.9,-6.7,M,0.0,M,,*4B $GPGLL,3906.2586,N,11720

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