float64 	utc_time
int8 	gps_status # 0-nofix  1-single  2-psrdiff  3-code_diff  4-narrow_init  5-narrow_float
int32 	pos_status
int32  	att_status
int32  	init_status
int32  	sate_num
float32  	hdop
float32  	pdop
float32  	diff_age