KerberosSDR 4-Channel RTL-SDR Passive Radar with Peak Hold Display
KerberosSDR 4-Channel RTL-SDR Passive Radar with Peak Hold Display by RTL-SDR Blog
https://www.rtl-sdr.com/kerberossdr-4-channel-rtl-sdr-passive-radar-with-peak-hold-display/ (sourced and republished from RSS feeds)
Recently we’ve been testing a simple peak hold for the KerberosSDR passive radar display. This results in some nice graphs that show aircraft and vehicle activity over time.
Passive radar works by using already existing transmitters such as those for HDTV and listening for reflections that bounce off of RF reflective objects. With a two antenna setup, it is possible to generate a bistatic range/doppler speed graph of reflected objects.
With the reference Yagi antenna pointed towards a 600 MHz DVB-T tower, and the surveillance antenna pointed to an airport we were able to obtain the graph below. The top two large traces show aircraft heading towards our station, whereas the bottom traces show aircraft leaving the airport. Also visible are multiple blips with smaller doppler speeds, and these correspond to vehicles.
The code on the KerberosSDR git will be updated in a few days time. We are also working on a more comprehensive passive radar tutorial that will try to explain concepts like processing gain, bistatic ranges and other important tips for getting good passive radar results… […continue reading full article]