Many international borders can cover hundreds or even thousands of miles. With such large areas to cover, it is impossible to secure every square mile of a border with a physical manned presence. As a result, illegal border crossings become harder to track. Therefore, technology must play a part in detecting, classifying and locating suspicious or illegal activities. Alongside optical, acoustic and radar, RF measurements play an important part in an integrated suite of sensors. Data from the complete suite of sensors can be cross-referenced to deliver actionable intelligence to those who are responsible for border security, giving confidence in the alerts they are receiving and fewer false alarms.
How does RF fit in?
Gangs who attempt illegal boarder crossings often carry some kind of communication device. If these devices transmit an RF signal, the CRFS intelligent receiver network can detect and geolocate them. A radar may pick up a moving object, but not provide other useful information. For example, is the signal source a band of drug smugglers, a lost family or some natural wildlife? An optical sensor may be able verify the alert generated by the radar, but, if it can’t, then adding a third sensor – an RF sensor – can give the security team greater confidence in their conclusion before sending a team out to investigate.
What can RF deliver?
A network of high-performance RFeye receivers can pick up RF spectrum transmissions over vast tracts of land. A cell phone, VHF radio or other device can be detected, classified and, most importantly, geolocated, giving the security team the precise location of the signal.
By using the data from the direction-finding Arrays or Nodes, CRFS software can triangulate the source of the signal with a high probability of intercept. If needed, it is possible to cross-reference the RF and radar data for even greater confidence.
Threat of drug smuggling using drones
Using drones to ferry drugs across a border is becoming an increasingly common occurrence. Over a four-day period in November 2017, 13 drones were spotted carrying drugs across the US-Mexico border. Using the same RFeye network, the RF transmissions of the drone can also be tracked and geolocated. It is also possible to track the position of the drone operators as well. Find out more about the CRFS counter-drone solution.