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Security and Policing

Security & Policing is THE official Government global security event, offering a world-class opportunity to meet, network and discuss the latest advances in delivering national security and resilience with UK suppliers, colleagues and Government officials.

Security and Policing2020-01-13T10:39:09+00:00

Understanding Multipath

Quick Read Summary: A new training video from CRFS to help users of 'Radio Direction Finding' (DF) Arrays understand the importance of multipath. The video animation is designed to help users visualize real world environments in terms of multipath/RF reflections. Different object models are used alongside materials that reflect RF differently to demonstrate the principle. View the full animation here RF Training A slightly different [...]

Understanding Multipath2020-01-17T12:22:47+00:00

Radar Jammers and Where to Find Them

A fully functioning radar provides crucial situational awareness in a wide variety of military settings. And as a key component in the electronic warfare arsenal, it is likely to be the target of countermeasures by opposing forces designed to degrade friendly capabilities, most likely some variety of radar jamming. This can range from straightforward brute-force jamming attempts, where an overwhelmingly powerful wideband RF signal [...]

Radar Jammers and Where to Find Them2019-12-09T16:58:15+00:00

Tracking Multiple Targets with 3D TDOA

In a recent blog post, we described how 3D TDOA could be used to detect spoofed ADS-B signals from aircraft. And it’s fair to say that the area around an airport is a heavily congested area, with large numbers of planes constantly coming and going. If you’ve got some familiarity with TDOA, though, there might have been something nagging at the back of your [...]

Tracking Multiple Targets with 3D TDOA2019-11-11T16:27:11+00:00

56th Annual AOC International Symposium and Convention

The Annual AOC International Symposium and Convention is the leading event for electronic warfare, electromagnetic spectrum operations, cyber-electromagnetic activities, and information operations professionals from around the world. CRFS will be exhibiting on booth #211. [email protected] New products and capabilities demonstrated at AOC New for 2019: RFeye Mission - Automated spectrum  monitoring  3D TDOA - 3 Dimensional geolocation for Aircraft and cUAS CRFS will be demonstrating [...]

56th Annual AOC International Symposium and Convention2019-08-07T09:20:04+00:00

Drone Detection: Myths and Reality

In a rapidly emerging field like drone detection, it can be difficult to separate fact from fiction. At CRFS, we've got years of experience designing and deploying drone detection systems, so we thought we'd do our bit by collecting some of the myths and misconceptions that we’ve come across, and trying to clear them up in this blog. 1) All you need for drone [...]

Drone Detection: Myths and Reality2019-09-24T13:25:21+00:00

AIS Spoofing Detection with TDOA

What is AIS? The AIS (Automatic Identification System) is designed to allow ships, boats and other maritime vessels to provide information about their identity, position and heading to other vessels and base stations. It works by broadcasting information using RF signals that can be detected by other users with AIS equipment. This data is transmitted over the maritime channels 87B (161.975 MHz) and [...]

AIS Spoofing Detection with TDOA2019-08-08T14:39:05+00:00

ADS-B Spoofing Detection with 3D TDOA

ADS-B Basics Automatic dependent surveillance-broadcast (ADS-B) is a surveillance technology currently being introduced in the US (Next Generation Air Transportation System), Europe (Single European Sky ATM Research) and across the globe. It functions as a replacement for secondary surveillance radar, and possibly even to replace primary radar in future, for air traffic monitoring and control. It requires planes to determine their current position using [...]

ADS-B Spoofing Detection with 3D TDOA2019-10-09T13:48:16+00:00

SIGINT capability for Special Operations Forces

SOF (Special Operations Forces) must act with the highest levels of discretion in hostile and often unfamiliar environments. In these scenarios, real-time RF situational awareness is vital for ensuring friendly forces remain undetected and detecting enemy activity. However, this vital capability must be weighed (literally) against the need for forces to be able to carry the equipment and remain agile. So what levels of situational [...]

SIGINT capability for Special Operations Forces2019-02-07T16:14:58+00:00

How accurate is TDOA geolocation?

TDOA (Time Difference Of Arrival), also known as multilateration, is a well-established technique for the geolocation of RF emitters. Using three or more receivers, TDOA algorithms locate a signal source from the different arrival times at the receivers. We trust that existing users of CRFS’s TDOA geolocation know, from their own experience, that it is very accurate and effective for most signal types. New [...]

How accurate is TDOA geolocation?2020-01-14T17:37:39+00:00
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