Doppler Systems Helps Find Culprit Jamming Aircraft Transmissions

Recently someone made hoax calls to pilots, causing a passenger flight to abort landing as it approached Melbourne Airport in Australia. In total there were 15 unauthorized transmissions on aircraft frequencies in the Melbourne area (see article here).  The Australian Communications and Media Authority deployed a Doppler Systems radio direction finder to assist the Australian Federal Police in finding the culprit.  Thankfully he was found and has been arrested (see article here).