I just learned of this little gem: Open Source ADS-B In
http://www.eaa.org/en/eaa/aviation-communities-and-interests/homebuilt-aircraft-and-homebuilt-aircraft-kits/resources-for-while-youre-building/building-articles/instruments-and-avionics/live-weather-and-traffic-for-less-than-$120

For the money this looks like in interesting project for these gloomy
winter days. A second receiver (~$25) can be added for 1090ES.
--
Dan, 5J