USSS Electronic Countermeasures Suburban is the

United States Secret Service The United States Secret Service (USSS or Secret Service) is a Federal law enforcement in the United States, federal law enforcement agency under the United States Department of Homeland Security, Department of Homeland Security charged with co ...

Electronic Counter Measures An electronic countermeasure (ECM) is an electrical or electronic device designed to trick or deceive radar, sonar, or other detection systems, like infrared (IR) or lasers. It may be used both offensively and defensively to deny targeting info ...

Chevrolet Suburban, an element of a United States presidential motorcade or vice-presidential motorcade. This vehicle is usually in front of the Presidential Sparecoach and usually trails the vice-presidential limo behind the Vice Presidential Follow-Up Vehicle and is used to counter guided attacks, such as IEDs, rocket-propelled grenades, and anti-tank guided missiles. Its most identifying mark are two collinear antennas mounted on the roof that are solely used in

barrage jamming Barrage jamming is an electronic warfare technique that attempts to blind (" jam") radar systems by filling the display with noise, rendering the broadcaster's ''blip'' invisible on the display, and often those in the nearby area as well. "Barrag ...

applications, the primary method used to counter IED threats. The antenna configuration can be changed according to threat level, for instance, taller antennas are used to increase the jamming protection distance, or change jamming frequency ranges. The vehicles were modified by Advanced Counter Measure Systems, Inc, a division of

Sierra Nevada Corporation Sierra Nevada Corporation (SNC) is an American, privately held aerospace and national security contractor specializing in aircraft modification and integration, space components and systems, and related technology products for cybersecurity and ...

. The secondary distinguishing mark are two dome-shaped electronic warfare (EW) sensors. The EW sensors are most likely millimeter-wave radars used to detect the launch of a rocket-propelled grenade (RPG) or laser range finder illumination and launch of an anti-tank guided missile (ATGM). Upon detection of a launch, or a laser range finder illumination, the system mostly likely triggers a salvo of infrared smoke grenades launched from this vehicle and the presidential limo to provide both a visual smoke screen in the

kill zone In military tactics, the kill zone, also known as killing zone, is an area entirely covered by direct and effective fire, an element of ambush within which an approaching enemy force is trapped and destroyed. The objective of the ambush force ...

and to also act as an obscurant for IR and radar guided attacks. This can be assumed, since it is known that the presidential limo is equipped with a driver's vision enhancer system which gives the driver the ability to drive in an infrared smoke environment.{{citation needed, date=November 2010 The visual obscurants would give the secure package the ability to leave the kill zone, leaving the counter-assault team (CAT) to deal with the threat.

External links

Sierra Nevada Remote Frisk Concealed Object DetectionShadowbolt IV Jammer SpecificationsPolice Agencies Seek Permission to Jam Cell Phone SignalsSSC San Diego TD 3105, September 2000Barrage Jamming Antenna
Executive Office of the President of the United States Electronic countermeasures