ADS-B: Instalasi gr-air-modes

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gr-air-modes untuk bisa monitor transmisi ADS-B membutuhkan

  • UHD
  • GNURadio
  • RTL-SDR
  • gr_osmoSDR

Lakukan sampai selesai proses


Instalasi gr-air-modes

Install 

apt install pyqt4-dev-tools

Lakukan 

cd /usr/local/src/SDR
git clone https://github.com/bistromath/gr-air-modes.git
cd /usr/local/src/SDR/gr-air-modes/
mkdir build
cd build
cmake ..
make
sudo make install
sudo ldconfig

Jalankan gr-air-modes

Jalankan menggunakan perintah 

modes_rx -d -P

Keluar 

gr-air-modes warning: numpy+scipy not installed, FlightGear interface not supported
gr-osmosdr supported device types: file fcd rtl rtl_tcp 
Using device #0: ezcap USB 2.0 DVB-T/DAB/FM dongle
Found Elonics E4000 tuner
Gain is 34
Rate is 4000000
Using Volk machine: ssse3_32
>>> gr_fir_ccf: using SSE
(-52 0.0000000000) Type 17 BDS0,9-1 (track report) from 8a0261 with velocity 270kt heading 103 VS 2304
(-52 0.0000000000) Type 11 (all call reply) from 8a0261 in reply to interrogator 0 with capability level 6
(-52 0.0000000000) Type 17 BDS0,9-1 (track report) from 8a0261 with velocity 270kt heading 103 VS 2304
(-52 0.0000000000) Type 11 (all call reply) from 8a0261 in reply to interrogator 0 with capability level 6

Catatan Antenna

with a piece of wire in the rtl283 antenna socket resulted in decodes from one aircraft almost overhead. Time for a better 1090MHz antenna. The J pole previously used was easy to build from 2 pieces of semi rigid cable so time to make another.It was tuned with a tracking generator/directional coupler/ spectrum analyser and achieved 32dB retun loss after tweaking. Putting this on the end of 35' of cable in the loft resulted in many more decodes and a torrent of data in the terminal:-


Membuat Virtual Radar

Next time to plot the data. The article pointed to Virtual radar server at http://www.virtualradarserver.co.uk/Mono.aspx so this was installed. Launching it with and clicking on the http link for local host resulted in the following map with 8 aircraft:-

The rtl2832 is not as sensitive as the Modesbeast I also have but it is only 5% of the cost!

Referensi

Pranala Menarik

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