fff is a convenient tool for in-field transmitter location & recovery by triangulation with directional antenna. The user interface is optimized for phones, tablets and other constrained handheld devices.

                                     /tmp/fifo
                                 ----------------->
                                    I/Q samples
RTL-SDR   ----->   fff_server                           fff_client
                   (gnuradio)         tcp:6666
                                 <---------------->
                                   XMLRPC control

> ./fff_client.py 
Find, fix and finish by NSA Litoměřice

This program is part of GlobalEye signals intelligence toolkit.
Visit http://jenda.hrach.eu/nsa/ for more information.

Hotkeys:  g/h ... SDR gain
          n/m ... speed
          q   ... quit

Starting DSP

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Adjust frequency and ppm in fff_server to your needs. Adjust FIR and decimation rate if you are targeting a wideband transmitter (default bandwidth is 10 kHz).

• mkfifo /tmp/fifo
• ./fff_client.py
• ./fff_server.py

Want to run fff_client over SSH from an untrusted machine?

no-agent-forwarding,no-X11-forwarding,command="path_to_fff_client.py" ssh-nsa key

git clone http://jenda.hrach.eu/p/fff/

http://jenda.hrach.eu/gitweb/?p=fff;a=summary