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  • Setup a Passive Forward Scatter Radar using an RTLSDR V3 Dongle. Here in France I receive the reflections from the Graves radar using the equipment listed below. If you live in the UK you may be able to receive the Graves transmission.

  • What is RTL-SDR V3 Dongle ? It's is a very cheap ~$25 USB dongle that can be used as a computer based radio scanner for receiving live radio signals in your area (no internet required). Depending on the particular model it could receive frequencies from 500 kHz up to 1.75 GHz 


This page is still under development 15th Nov 2021

uap tracker passive radar image v2.jpg

5 element Yagi Antenna

RG213 - 50 ohm

military  grade Coax

Pigtail SMA Male

To S0239 UHF

RTL-SDR V3 Dongle

USB extension lead

SDR Console V3 on laptop

  • Buy the official RTL-SDR V3 Dongle from the website  here

  • Buy the RTL-SDR Blog R820T2 RTL2832U 1PPM TCXO SMA Software Defined Radio with Dipole Antenna Kit  here

  • Buy the Diamond 5 element 2M Yagi Antenna which I currently use for the UAP Tracker live stream here 

  • Buy the RG213 - 50 ohm military grade coax currently used for the live stream (per metre) here

  • Buy the Pigtail SMA Male to S0239 UHF patch lead here

  • What is SDR Console?

  • software is a Windows solution for Software Defined Radio (SDR) receivers and transceivers. The software is being continually developed with new features added on a regular basis. Licenced radio amateurs and shortwave listeners do not need a licence to use this software; a licence is required for commerical use.

  • This software supports radios from most major manufacturers, simple soundcard radios such as SoftRocks and the excellent Airspy, ELAD and SDRplay ranges. What are you waiting for?

  • Download SDR Console for free here


The image below represents SDR Console V3 as used in the live stream

2020-09-01_02-01-58-517 pass rad example 4.png

Graves Radar Frequency 


VB Audio Virtual cable

Background noise

Radar signature

Graves Signature

UTC Time

UTC Time

Signal strength


1.0 KHz


Interesting links to sites about passive forward scatter radar

  • The Norman Lockyer Observatory is both a historical observatory and home to an active amateur astronomical society. It is a centre for amateur astronomy, meteorology, radio astronomy, and the promotion of science education. Detecting meteors with our system differs from Military Radar but the principle is the same. Radio waves sent out by a transmitter are reflected by metallic objects – in our case the metallic ionised trail of the meteor (“shooting star”), which we see as that bright streak in the sky. Click here

  • Britastro Detection of Meteors by RADAR written by Dr David Morgan 2011 - Excerpt - Many amateurs make use of old VHF analogue TV transmitters, but with the advent of specialist very high power continuous wave (CW) transmitters in several countries including France and the US, it is now possible to use these as the basis of a Meteor Radar system. Download the document here

  • Retram Understanding exactly what is detected by amateur stations at VHF using passive radar techniques is not an easy task. Doppler plots show interesting features that are quite difficult to connect to underlying physics : sometimes starting with very fast decaying Doppler, plots are mainly containing spread signals at low Doppler shifts. Click here

Tracking UAP's with SDR, is it possible? interesting post about UFO's being tracked by military aircraft on frequency of 2995mhz - 3000mhz 


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