Attenuation rates of coastal radar signals at 25 MHz
Attenuation rates of coastal radar signals at 25 MHz
复制标题
25 MHz 海岸雷达信号衰减率
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
D. Barrick
中科院分区：
文献类型：
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作者：
R. Lyons;D. Barrick
地波信号随距离的衰减率是限制海岸雷达性能的一个因素。我们发现，观察到的衰减率小于理论预测率在25 MHz。这一结果，与较低频率的早期研究结果相反，表明对流层管道在20 MHz以上开始。各种海况和距离的衰减率列表，以允许系统性能的估计接近25 MHz。
The attenuation rate of the ground wave signal with range is a factor limiting the performance of coastal radars. We show that observed attenuation rates are less than theoretically predicted rates at 25 MHz. This result, contrary to earlier findings at lower frequencies, suggests the onset of tropospheric ducting above 20 MHz. The attenuation rates for various sea states and distances are tabulated to allow estimates of system performance near 25 MHz.