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The second ADS-B plane tracking installation, with a Raspberry Pi 2 also running PiAware software and feeding the FlightAware.com site, along with an R820T2 SDR receiving dongle. The 1090MHz antenna is mounted in a window 27 stories above Manhattan facing ESE. Tracking distances of over 300 miles are common.
Hello Raspberry Pi!
For an excellent introduction to the Pi and Python programming click on...
Left to right:

Raspberry Pi with DVMega board for D-Star operation.

Raspberry Pi with RT820T SDR dongle for ADS-B plane tracking, running the PiAware image.

Baofeng BF-F8 2M/440MHz HT for International Space Station packet reception, also VHF/UHF repeater work.

Raspberry Pi for ISS tracking and live video feed running the ISS-Above image.
APRS