Some notes on radio.
Operating notes for amateur radio.
Radio reception of tower communications for aviation, as well as ADS-B transponders that can be received on 1090 Mhz.
A good selection of FM broadcast stations that are interesting to listen to, locally and from afar.
Amateur radio operators use a grid square system (“Maidenhead”) to give locations of stations with some precision using very few characters. Herein is some set of grid squares with interesting stations.
Marine radio including automatic ship location with AIS-B.
Meteors can be heard via radio using backscatter.
Railroad radio via scanners.
Listening to remote public service and utility traffic via a variety of scanner systems.
Tuning in shortwave stations around the world.
Various Skywarn repeaters and rebroadcast feeds.
Radio tuners implemented in software, for your listening and hacking pleasure.