Home' RTCA Documents for Review : DO-230H FRAC Contents 166
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such enhancement, while still providing VGA-quality resolution, but the current level of
technology has limitations including sensitivity at low light levels.
Video compression software to reduce transmission bandwidth and video storage requirements.
Several compression standards are available and the technology continues to improve.
Video analytics to automate detection and assessment functions in the SOC (developed in Section
7). Many video analytic functions are available, and the technology is continuing to mature, but
performance is dependent on the conditions of use and the level of false alarms which an operator
Video management software which the SOC operator can use to manage event-driven and
observational imagery from surveillance cameras.
System integration, at a level suitable for each airport [Refer: Section 8: Integration].
Camera, filter and lens selection must deal with these issues for night surveillance to be successful,
especially if video analytic functions are Video surveillance camera operational performance is dependent
on many factors including what the operator is trying to do, e.g., detect, classify, or recognize a target;
target size, aspect, contrast and emissivity; scene visibility and illumination; etc. It is also a function of
scene conditions including atmospheric effects and local lighting. Video camera operation is particularly
sensitive to the presence of reflections in daytime, off shiny building walls and aircraft fuselages, and strong
Imaging Sensor Type
For monitoring the fenced perimeter at night, distance considerations will often dictate the use of long focal
length lenses. Lens focal length and camera field-of-view are inversely related; as the focal length increases,
the field-of-view decreases.
For perimeter surveillance, camera format should be selected to provide the desired horizontal field
coverage when matched with an objective lens having the focal length and the relative aperture needed for
the viewing distances. These conditions generally favor the use of 1⁄2-in or larger format cameras.
Stabilization software is also available which significantly improves the ability view video when the camera
is shaking due to weather, mobile device in motion, etc.
Cameras may be installed in fixed positions or on motorized pan-tilt (PT) platforms, with the cameras fitted
with motorized zoom objective lenses. The PTZ arrangement provides great flexibility in adapting to
varying scene distances and target motions. PTZ control can be exercised manually, from the Security
Operations Center, or can be pre-programmed to “tour” preset positions. For critical monitoring of a single
location consider using a home preset to return a camera to its critical monitoring position if moved
Mount cameras at safe height to prevent damage and provide good field of view. Also if possible, mount
cameras inside secure areas and provide tamper protection if the camera is subject to tamper. Firm mounting
masts are required to prevent motion by wind or pan / tilt unit movement. This is particularly important for
higher power lens used for looking longer distances.
Selecting Cameras and Lenses
Video surveillance camera operational performance is dependent on many factors including what the
operator is trying to do, e.g., detect, classify, or recognize a target; target size, aspect, contrast and
emissivity; scene visibility and illumination; etc.
Video camera operation at night is operationally more demanding than in daytime.
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