View source for ADS-B: Instalasi gr-air-modes

gr-air-modes untuk bisa monitor transmisi ADS-B membutuhkan 
* UHD
* GNURadio
* RTL-SDR
* gr_osmoSDR

Lakukan sampai selesai proses

* [[GNURadio: Compile GNURadio + UHD]]



==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==

* http://www.irrational.net/2012/08/06/tracking-planes-for-20-or-less/
* http://g4fre.blogspot.com/2012/09/ads-b-using-ubuntu-and-rtl2832.html
* http://www.hamradioscience.com/the-rtl-2832u-sdr-and-ads-b/

==Pranala Menarik==

* [[ADS-B]]
* [[ADS-B: Instalasi gr-air-modes]]
* [[ADS-B: Antenna Strip Line]]
* [[ADS-B: Antenna Vertikal]]