geolocation Archives - CRFS - Spectrum Monitoring and Geolocation

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?2019-02-06T17:15:09+00:00

Direction Finding RMS error: Lies, damned lies and statistics

By Filip Zganec, Regulatory Sales Manager, CRFS Is the RMS error of a DF system as important as some manufacturers would have you believe? Some of our competitors go to extraordinary lengths to talk up the significance of 1° RMS error and to get it specified in tenders as the supposed gold standard. Ever wondered why? It’s because they can limit the competition and can [...]

Direction Finding RMS error: Lies, damned lies and statistics2018-11-30T12:14:29+00:00

Geolocation in post-processing

Just seen an interesting transmission appear on your spectrum, but now it’s disappeared? Need to know where it came from, but you weren’t running a geolocation task at the time? Tough luck, it’s gone forever. If you’re lucky, you can sit there staring at your screen and it might pop up again. Sounds ridiculous? That’s what we thought, which is why we’ve developed our geolocation [...]

Geolocation in post-processing2018-09-28T12:09:47+00:00

Multi-user, Multi-mission: Spectrum monitoring and multi-tasking

CRFS’s next generation intelligent radio receivers, or RFeye Nodes as we call them, allow multiple users to run multiple independent sets of monitoring and geolocation tasks simultaneously using the same hardware. This maximizes your return on investment. Distributed networks may vary from a few Nodes over a small area like a building, to hundreds of Nodes across a whole country. Users can log on to [...]

Multi-user, Multi-mission: Spectrum monitoring and multi-tasking2018-09-28T12:12:07+00:00

Using RFeye Simulation Capabilities for Virtual Training

CRFS simulation tools allow new users to be trained to use RFeye geolocation software in realistic scenarios without requiring real transmitters or receivers to be set up (especially important if wishing to test a scenario involving unlicensed spectrum use without breaking the law yourself!). Our simulation tools allow a network of simulated receivers and transmitters to perform spectrum monitoring tasks just like a real network. [...]

Using RFeye Simulation Capabilities for Virtual Training2018-10-26T15:54:18+00:00

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