Agenda - 11-17-2011 - 1 - Attachment 1

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Orange County Emergency Management, North Carolina Final VIPER Anal sis Re ort Au ust 20, 2004 4.0 VIPER COVERAGE AND CAPACITY The VIPER multi-site network offers more coverage and capacity from a greater number of radio sites than the privately owned design provided in the Phase 2A Final Report. The four main site locations in Orange County are in the same general areas as in the privately owned design. VIPER has a site in Durham city which will serve a similar purpose as the OCEM site in the privately owned system design by providing coverage in the East Central portion of Orange County including Route 70 and Interstate 85. VIPER has sites outside of Orange County that provide fill-in coverage in the county which are not in the privately owned design. Orange County's user radios operating on the VIPER network will take advantage of the greater radio coverage pxovided in the VIPER multi- site design by roaming into and out of VIPER sites as they travel throughout the area. 4.1 Coverage NC-State Highway Patrol has taken responsibility for RF Coverage of the VIPER infrastructure design including additional sites required for Orange County coverage. NC-SHP has provided two predicted coverage maps indicating sites planned for Orange County. FIGURE 4-1 depicts predicted VIPER on-the-street portable talk-back coverage in Orange County with 6dB antenna gain. FIGURE 4-1 reflects the conditions expected after implementation of all the sites, except for sites that will not be constructed as noted below. FIGURE 4-2 depicts predicted VIPER on-the-street portable talk-back coverage in Orange County with no antenna gain. The following VIPER sites in Orange County are depicted on the coverage maps provided by NC-SHP: • D-Hillsborough (Eno Mountain) • Chatham Mtn. (WLTNC) • D-Laws-EMC (Orange County North) • UNC-MED (Chapel Hill) Section 4 -VIPER Coverage and Capacity [~ Page 12 of 43 . ,