Home' RTCA Documents for Review : DO-230H FRAC Contents 158
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Post-Climb-and-Jump Test to determine if an intruder will be detected when climbing the fence
and attempting to jump over the fence.
Crawl test is performed at 10 feet intervals in a sector at a crawl speed of 4 to 6 inches per second.
Roll test within the zone of detection.
Run-and-Jump test is performed from the length of the sector to verify that an intruder avoid the
Directional testing to determine travel direction.
General Characteristics – Radar systems provide volumetric surveillance and serve as all-weather detection
and tracking sensors. Radar systems are able to search a wide area, detect and track an object approaching
a secure area, and provide accurate object location distance, bearing, speed and direction of motion
information, usually within seconds. Radar systems are an attractive surveillance option due to their high
coverage efficiency, i.e., coverage to cost ratio. The best deployment environment and use of a radar system
for perimeter intrusion detection is in an open area.
Range – Depending on the radar system, the effective range can span from 100 meters up to many
Detection Capabilities – Automatic detection and tracking of moving (Doppler) or stationary (non-
coherent) objects in the radar coverage area. Wide field of view (up to 360 degrees) to cover broad areas
with a single sensor. Radar provides position of the tracked object. The position information may be in
latitude and longitude or other units. Radar systems are impervious to darkness and work well (depending
on the frequency) in most weather conditions.
Radar detection capabilities are specific to the system type employed. Doppler radars are sensitive to
motion; non-Doppler radars detect both stationary and non-stationary targets.
Radar systems operate in all weather, day and night, but they must have a clear line-of-sight (LOS) to detect
System Limitation –
Radars can only detect objects within their line-of-sight (LOS); therefore, elevating the radar may
be required to minimize dead zones created by large objects, buildings or terrain
masses/depressions that can block the radar signals and provide safe havens for intruders.
Forested or densely urban areas may not be well suited for radar surveillance. Radar sensors can be
mounted high on buildings to provide better LOS in locations where surveillance is required.
Extreme weather conditions, such as rain/snow storms can decrease detection potential
Nuisance alarms can be generated by detection of foreign objects outside the protected area or by
the random reflection of radar energy.
Doppler radar systems are most sensitive to motion directly towards or away from the radar, and
much less sensitive to motion in concentric circles around the radar. Doppler will not detect
stationary objects or those moving slower than a specific minimum speed.
Radar systems only detect the presence of an object, they do not reveal what the object is, and
therefore they should be augmented with video cameras for assessment by operators.
A radar perimeter detection system should be capable of detecting an intruder weighing a minimum
of 35 kilograms (77 pounds) passing through the zone of detection between the transmitter and
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