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2010 U.S. Secret Service Electronic
Countermeasures Chevrolet Suburban
United States Secret Service Electronic Countermeasures vehicle
is an element of the United States presidential motorcade .
This vehicle is usually in
front of the Presidential Spare coach 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 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.
The secondary distinguishing
mark are two dome-shaped EW Sensors. The EW
sensors are most likely Millimeter-Wave
radars used to detect the launch of an RPG
(Rocket Propelled Grenades) 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
and to also act as an obscurantism 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. The visual obstructions
would give the secure package the ability to
leave the kill zone, leaving the CAT
(Counter-Assault Team) to deal with the
threat.
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