ADS-B: Instalasi gr-air-modes

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Persiapan

Buat directory 

mkdir /usr/local/src/SDR
cd /usr/local/src/SDR

Instalasi paket pendukung 

sudo apt-get install cmake swig libcppunit-dev python-cheetah doxygen \
libboost-all-dev python-sphinx libfftw3-dev python-numpy libqwt-dev \
libusb-dev libusb-dev libusb-1.0-0-dev libgsl-dev python-wxgtk3.0 git qtcreator

Install GNURadio

Lakukan 

cd /usr/local/src/SDR
git clone --recursive https://github.com/gnuradio/gnuradio.git
cd gnuradio
git checkout maint-3.8
git submodule update --init --recursive
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release -DPYTHON_EXECUTABLE=/usr/bin/python3 ../
make
make test
sudo make install
sudo ldconfig

Install rtl_sdr

Lakukan 

cd /usr/local/src/SDR
git clone git://git.osmocom.org/rtl-sdr.git

Masuk ke directory rtl-sdr & lakukan 

cd /usr/local/src/SDR/rtl-sdr/
mkdir build
cd build
cmake ../

make
sudo make install
sudo ldconfig

Aturan udev yang penting agar USB dongle terdetek dengan baik perlu di copy menggunakan perintah berikut 

cd /usr/local/src/SDR/rtl-sdr/
sudo cp rtl-sdr.rules /etc/udev/rules.d/40-basic-permissions.rules
/etc/init.d/udev restart

Kita dapat meng-unplug & replug USB dongle. Cek menggunakan perintah 

lsusb

Keluar 

Bus 001 Device 002: ID 0bda:0158 Realtek Semiconductor Corp. USB 2.0 multicard reader
Bus 006 Device 002: ID 1bcf:0005 Sunplus Innovation Technology Inc. 
Bus 001 Device 003: ID 0bda:2838 Realtek Semiconductor Corp.


Install gr_osmoSDR

Upgrade cmake 

sudo du
apt remove --purge cmake
cd /opt/
wget https://github.com/Kitware/CMake/releases/download/v3.16.2/cmake-3.16.2-Linux-x86_64.sh
chmod +x /opt/cmake-3.16.2-Linux-x86_64.sh 
sudo bash /opt/cmake-3.16.2-Linux-x86_64.sh
sudo ln -s /opt/cmake-3.16.2-Linux-x86_64/bin/* /usr/local/bin
sudo ln -s /opt/cmake-3.16.2-Linux-x86_64/bin/* /usr/bin
cmake --version

Masuk ke directory 

cd /usr/local/src/SDR/
git clone git://git.osmocom.org/gr-osmosdr

cd /usr/local/src/SDR/gr-osmosdr/
git checkout gr3.8
mkdir build
cd build/
cmake ../
make
sudo make install
sudo ldconfig

Instalasi gr-air-modes

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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