#!/usr/bin/awk  -f
BEGIN {
	FS=","
}

/^\$GPZDA,/ {
	day=$3; mon=$4; year=$5
	hour=substr($2,1,2)
	min=substr($2,3,2)
	sec=substr($2,5,2)
	cmd="date -d '"hour":"min":"sec" "mon"/"day"/"year" GMT'"
	cmd | getline date
	close(cmd)
}

/^\$GPGGA,/ {
	gpgga=1
	if ($3 != "") {
	  #lat=35 + ($3-3500) / 60
	  #lon=149 + ($5-14900) / 60
	  lat=$3; lon=$5
	  i=int(lat/100); lat=-((lat-i*100)/60 + i); 
	  i=int(lon/100); lon=(lon-i*100)/60 + i;
	  alt=$10
	}
	else {
	  lat=1001; lon=1001; alt=1001
	}
}
/^\$GPVTG,/ {
	bearing = $2
	speed = $8
	if (gpgga)
	  printf("%10.6f %10.6f %6d %5.1f %12.6f %s\n",
		lat, lon, alt, speed, bearing, date)
	gpgga=0
}