Using the ITU-R rain attenuation forecasting model,and based on the rainfall data and the geographic location parameters of main cities in our country,the isograms of rain attenuation distribution for the communication satellite with the orbital location 92° E in Ka band(30/20GHz)was presentd.
利用ITU-R给出的降雨衰减预测模型,根据我国主要城市的分钟降雨率数据,计算出我国Ka波段(30/20GHz),轨道位置为92°E的卫星通信系统在线极化波情况下的降雨衰减等值线分布,此结果可作为Ka波段卫星通信系统设计的理论依据。
In order to keep the transmission quality of satellite communication,and based on the analysis of rain data of China,picture of rain attenuation contours can be calculated.
降雨衰减是影响Ka波段卫星通信系统传输质量及系统性能的主要因素之一。
A new prediction model of rain attenuation of terrestrial line-of-sight systems;
视距链路的雨衰减预报模式研究
An earth-space path rain attenuation model based on evolutionay neural network;
基于进化神经网络的地空路径雨衰减模型
Prediction model of rain attenuation based on the EXCELL rain cell model for the terrestrial line-of-sight systems
基于雨胞分布的视距链路雨衰减预报模型
A new model is developed for the computation of rain specific attenuation from rain volume reflectivity,for frequencies from 1 GHz to 100 GHz,and the radar equation,maximum range and signal-to-noise ratio and signal-to-clutter ratio in rain have also been analyzed herein.
文中拟合得到了由降雨的雷达体反射率反演雨衰减率的公式,适用频率1~100 GHz,并且给出了降雨存在时的雷达方程、最大作用距离以及雷达接收信号信噪比与信杂比的变化。
Study of Rainfall Attenuation Characteristics of Ku-Band Satellite Link
Ku频段卫星链路降雨衰减特性分析
The Calculation of Rain Attenuation in Ka-band Satellite Communication Systems
Ka波段卫星通信系统降雨衰减的计算
Research on Rain Attenuation Compensation Methods in Ka Band Multi-beam Satellite Communication;
Ka波段多波束卫星通信系统降雨衰减补偿方法的研究
The Study of the Character of Rain Attenuation and Countermeasure Methods of the Ka-band Satellite Communication System in China;
我国Ka波段卫星通信系统降雨衰减特性及补偿方法的研究
Analysis of the Rain Attenuation Characteristic in the Electromagnetic Wave Transmission of Airborne Radio Equipment
降雨对机载无线电设备电磁波传输的衰减特性分析
microwave attenuation in clouds and precipitation
云和降水中的微波衰减
Prediction model of rain attenuation based on the EXCELL rain cell model for the terrestrial line-of-sight systems
基于雨胞分布的视距链路雨衰减预报模型
The amount of rainfall is down compared with last year.
同去年相比，降雨量减少了。
The Rainstorm Run of Calculation of Small Basin Based on Three-Rainstorm-Attenuation Index
三段式暴雨衰减指数条件下的小流域暴雨产流计算
Simulating study on descent character of hot smoke under sprinkler spray and fire source with decreasing HRR
衰减火源条件下喷淋烟气沉降特性模拟研究
Records show that yearly rainfall has been decreasing since 1968.
记录显示，自1968年以来，每年的降雨量一直在减少。
But it has dropped sharply over parts of northwestern Asia.
而在亚洲西北部的一部分地区降雨量却锐减。
Reduction effect of sunken green space on urban rainfall-runoff pollution
下凹式绿地对城市降雨径流污染的削减效应
attenuation compensator
衰减均衡器衰减补偿器
The rolloff is usually expressed as attenuation per unit interval, such as6 dB per octave.
衰减截止频率通常被表示为单位音程的衰减，比如每一个八度降低6分贝。
A decrease, decline, or relaxation, as of effort or energy.
放松，弛缓，衰落努力或力量方面的减少、降低或放松
A recession is characterized by a decreased demand for goods, increased unemployment, and decline in the gross national product.
衰退的特点是需求下降，失业增加，国民生产总值减少。
However, without dust there would be less rainfall and sunsets would be less beautiful.
然而，假如没有灰尘，降雨量将会减少，落日的余辉也不会绚丽多彩。