range attenuation

Atmospheric attenuation of scene contrast is studied theoretically on the basis of radiometric principles, and the relationships between the measured maximal detection range for a target and visibility distance under two possible conditions are obtained.

根据辐射度学原理，从理论上研究景物对比度在大气传输中的衰减，得到了在两种可能的条件下所测得的目标最大探测距离与能见距离的关系。

互联网摘选

Large fluid viscosity or low permeability ( High couple damping coefficient) make the shift to high frequencies of the main dispersion frequency range, and the attenuation coefficient knee points for the different frequency dependence, which represents the relaxation frequency movement to high frequencies.

高粘性流体和低骨架渗透率（高的固流耦合衰减系数）使得主要频散发生的频率范围，和衰减系数出现不同频率响应特征的鞍点向高频移动，这反映松弛频率向高频段移动。

互联网摘选

The essay discusses the Guangzhou area's atmosphere attenuation features in the range of 5 GHZ-100 GHZ, and summarizes the relationship between atmosphere attenuation and absolute humidity, and the rules that elevation angle and atmosphere attenuation must follow.

讨论了广州地区大气在5GHz-100GHz范围内衰减特性，总结出大气衰减与绝对湿度的关系和仰角与大气衰减遵循的规律。

互联网摘选

In this paper, the environment attenuation factor is introduced to the radar equation and the simulation results of the detection range of stand-off jamming based on weather conditions are given.

为此，本文将衰减因子引入雷达方程，仅就机载支援式干扰的电子对抗在受多种气象条件影响下的干扰暴露区计算进行仿真研究。

互联网摘选

For the same line with obstructor at the user's terminal the attenuation of carrier signal is weak, when transferring distance is 30km, the applicable frequency range is 0.1~ 200kHz.

当用户处有阻波器时，载波信号衰减很小，在30km范围内可用频段为0.1～200kHz。

互联网摘选