foxgiggle@ubuntu:~/sdr/gr-air-modes/build$ uhd_modes.py -g 21 -d -P
gr-air-modes warning: numpy+scipy not installed, FlightGear interface not supported
linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-162-g485fe587
gr-osmosdr supported device types: file fcd rtl rtl_tcp uhd
Using device #0: Generic RTL2832U (e.g. hama nano)
Found Elonics E4000 tuner
Gain is 21
Rate is 4000000
Using Volk machine: sse4_1_64
>>> gr_fir_ccf: using SSE
(-5 0.0000000000) Type 17 subtype 09-1 (track report) from 484057 with velocity 553kt heading 69 VS 0
(-6 0.0000000000) Type 17 subtype 09-1 (track report) from 461f31 with velocity 496kt heading 59 VS 0
(-7 0.0000000000) Type 17 subtype 05 (position report) from 4ca855 at (58.493352, 17.765717) at 36000ft
.......