On Friday, January 1, 2016 at 2:12:10 PM UTC-8, Dan Marotta wrote:
I just learned of this little gem: Open Source ADS-B In

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

There have been a number of Raspberry Pi-based ADS-B In projects that can deliver ADS-B Out traffic as well as TIS-B (delivering ADS-B 1090ES, UAT and Mode C/S traffic for a 15 mile radius around you if you have ADS-B Out), plus FIS-B (including weather) AND any TIS-B traffic delivered to ADS-B Out-equipped traffic near you.

All for a lot under $100. With the right software you could deliver an NMEA stream to be MUXed with any other NMEA data you want to go do a display of your choice.

The really interesting detail from the EAA is that you might be able to receive all this information without equipping with ADS-B Out (though that may well be required for gliders post 2020.

Relevant excerpt:

"In most areas an ADS-B in signal can be had at or just above pattern altitude. You will begin receiving NEXRAD radar, METARs, TAFs, NOTAMs, TFRs, and other Flight Information Service - Broadcast (FIS-B) products. Some apps will explicitly note that these products are being received via ADS-B. With one radio tuner the unit will pick up traffic squawking ADS-B out on 978 MHz. If you are ADS-B out equipped, you will also receive TIS-B traffic. TIS-B is datalinked to FAA radar, meaning you get Mode C and primary targets. EAA is working with the FAA to expand TIS-B availability to all aircraft, not just those equipped with ADS-B out."

Pretty cool - you'll be able to see every aircraft for as far as you want to look - ultimately including most gliders I expect.

9B