Now that the Raspberry Pi can drive big FDS132 LED matrix displays in real time, I wondered what would happen if I sent the output of rtl_sdr dump1090 air traffic monitor to it by just using some simple Unix utilities, awk and grep:
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Done with: dump1090 --metric --interactive | grep -v -e ---- -e Flight | awk '// { printf "%s %s\n%s %s\n%s %s\n", $1, $2, $3, $4, $5, $6}' | nice -n -19 FDS132_matrix_display -s 400 -u
It says flight Ryan Air RYR147Y at 11575 meters altitude, speed 733 km/h, and gives its GPS coordinates, updated (scrolled vertically) for all planes in the vicinity.
The RTL E4000 tuner is plugged into the Raspberry Pi USB, jsu the standard DVB-T antenna that came with it.