I’m super interested in the rtl-sdr project because, as a coincidence, a large portion of the the rtl-sdr project community seems to be attracted to it’s use as an aviation communications interface (see the plentiful aircraft transponder-decoding examples). A coincidence only to my personal affinities: as a pilot, avionics engineer and possessing an unreasonable passion for aviation, these applications caught my eye. Practically, of course, the correlation between the promises of SDR and aviation use-cases makes a lot of sense: aircraft operations generally rely on several RF communication modulation schemes, mostly within a spectrum accessible by inexpensive SDR hardware. Conveniently, most of these signals are within the physical capabilities of the rtl-sdr project hardware, such as: ILS localizer and glideslope, VOR/DME navigation aids, ACARS messaging, VHF Voice Communications, UAT...