View source for Receiving Mode-S with a USRP N200

==Overview==
The Ettus Research™ USRP™ (Universal Software Radio Peripheral) is used for a number of military and aerospace applications.  In this example, the USRP N200/N210 is used to receive and decode Mode-S beacons from real-world aircraft. The information from these beacons is displayed on Google Earth. This demonstration shows the flexibility offered by GNU Radio, an a open source package and its strong user-base. 

The Gnuradio Out-Of-Tree module (OOT) [http://www.cgran.org/pages/gr-air-modes.html gr-air-modes] will be use to receive Mode-S with the USRP.

==Requirements==
* Python >= 2.5
* NumPy and SciPy 
* Gnuradio >= 3.5.0
* Ettus UHD >= 3.4.0
* SQLite 3.7 or later
* CMake 2.6 or later

==Installation==

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

==Usage==
After successfully building and installing the gr-air-modes OOT, you will have two applications to receive Mode-S. 

* '''modes_rx'''
** Command line based, textual output of data received
 

* '''modes_gui'''
** GUI based interface with Google Maps integration


==Additional Resources==
For additional information on gr-air-modes please see the [https://github.com/bistromath/gr-air-modes gr-air-modes Github Repository].



[[Category:Application Notes and White Papers]]