摘要: An SHF/EHF measurement program was conducted to determine the effects on propagation through vegetation common to the Colorado East Slope. Presented in this report are the frequency dependence of vegetation losses, polarization, d... 展开 An SHF/EHF measurement program was conducted to determine the effects on propagation through vegetation common to the Colorado East Slope. Presented in this report are the frequency dependence of vegetation losses, polarization, depolarization, and backscatter on observed signal amplitude for three deciduous tree paths, two conifer tree paths, and one grass path at 9.6, 28.8, and 57.6 GHZ. Some of the variables for these measurements were foliage depth, antenna position, antenna pointing, and antenna beamwidth. Time series data showing scintillation due to wind is displayed and discussed. A single rain event and a single snow event were recorded. Summer foliage measurements were compared to a wintertime defoliated state with identical terminal locations used for each condition. (Author) 收起