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https://hdl.handle.net/11681/9265| Title: | Temporal weather impacts upon exterior intrusion detection systems |
| Authors: | United States. Air Force. Electronic Security and Communications Center for Excellence. Ryerson, Charles C. (Charles Curtis) Peck, Lindamae. |
| Keywords: | Atmospheric circulation Beam break Climate Countermeasure Detection capability Diurnal Electromagnetic Energy budget Environment Fence-mounted Fog Fronts Geography Icing Intrusion detection Meteorology Microwave radar Nuisance alarms Optical-fiber Passive infrared Precipitation Seasonal Security fences Snow cover Soil freezing Soil moisture Storms Taut-wire Temperature Thermal infrared Topography Vegetation Video-motion Weather |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | CRREL report ; 95-25. |
| Description: | CRREL Report Abstract: Fundamentally, an electronic exterior intrusion detection system (IDS) cannot directly detect intruders; it detects a variation in the condition being monitored, extracts characteristics of that variation, and assesses whether such a variation probably is caused by an intruder. However, exterior IDSs do not operate in a benign natural environment. Their environment is constantly changing as a result of solar-driven energy and moisture fluxes that create the weather. These weather changes often cause variations in the conditions being monitored by IDSs. The challenge, therefore, is to recognize how and when IDSs are responding to some change in their natural environment, rather than to intruders. This report is a technical analysis of causes of weather-driven temporal changes in the environment that impact the operational efficiency of IDSs. The report is intended to assist security designers in selecting suitable IDSs for a site and to assist security managers in operating IDSs at the required level of reliability. This is accomplished by identifying temporal variations in weather that are sufficiently general to be identified as patterns, and by identifying how different IDS phenomenologies respond to these patterns. The result is an understanding of how weather conditions influence the ability of types of IDSs to detect reliably activities representative of an intruder while successfully discriminating against weather-created conditions within a detection zone. The main body of the report is organized by temporal scale: diurnal, quasi-periodic, and seasonal. Within each temporal scale, weather processes common at that scale are explained. Topics covered include air and soil temperature, soil moisture, precipitation, snow cover, winds, fog, storms, urban and topographic effects, vegetation effects, and solar radiation. Appendixes include a summary of weather impacts on IDSs, extensive indexes by IDS and weather topics, cloud and fog illustrations, explanations of the relationship of weather patterns to forecasts, suggestions about how to perform environmental site surveys, and sources of additional weather information. NOTE: This file is large. Allow your browser several minutes to download the file. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/9265 |
| Appears in Collections: | CRREL Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CR-95-25.pdf | 36.24 MB | Adobe PDF |  View/Open |