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首页> 美国政府科技报告 >Predicted and Measured Field Strengths in the Boulder, Colorado, Area from TwoProposed Terrestrial Digital Television Tower Sites
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Predicted and Measured Field Strengths in the Boulder, Colorado, Area from TwoProposed Terrestrial Digital Television Tower Sites

机译：从两个拟议的地面数字电视塔站点预测和测量科罗拉多州博尔德地区的场强

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In this report, we have analyzed the expected electric (E) field strengths in theBoulder area from two proposed terrestrial DTV transmitter locations, the Eldorado Mountain site and the Squaw Mountain site. The Eldorado Mountain and Squaw Mountain sites were selected from the set of candidate sites because these two possible sites bound the propagation environment that would occur at both the Table Mountain National Radio Quiet Zone (NRQZ) and the Department of Commerce (DOC) Laboratories in Boulder. The Eldorado Mountain site affords substantial line-of-sight coverage over the Boulder area, while the Squaw Mountain site affords only indirect (diffractive) coverage over the same area. The other possible tower sites fall between these two types of propagation conditions. The goals of this work were to determine the expected E-field strengths at the Table Mountain NRQZ located north of Boulder, Colorado and at the DOC Laboratories located at 325 Broadway in Boulder, Colorado. This study also assessed the potential impacts of the proposed sites on a broad range of Federal Government research and metrology programs that depend upon a relatively quiet radio-frequency electromagnetic environment (see Section 8). The DOC conducted tests and analyses to assess whether E-field strengths produced by the DTV transmissions from either proposed site could meet the FCC's regulatory limits for the Table Mountain NRQZ. In addition, tests and analyses were performed to ascertain the impact of DTV transmissions from either proposed site on measurement efforts that are performed on a regular basis at the DOC Laboratories. In this study, measured and predicted E-field strengths are used to estimate the E-field strengths in the Boulder area for the proposed transmitter antenna heights of two possible transmitter locations, Eldorado Mountain and Squaw Mountain. With these predictions, we were able to determine the E-field strengths at both the DOC Laboratories and at the Table Mountain NRQZ.

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