现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
1期
27-30
,共4页
数值天气预报%电波%雨衰%预测模型
數值天氣預報%電波%雨衰%預測模型
수치천기예보%전파%우쇠%예측모형
numerical weather prediction%electric wave%rain attenuation%prediction model
随着Ka频段卫星通信产品的推广应用，降雨衰减在卫星通信系统中的影响越来越大。经典雨衰预测方法利用年固定时间百分比降雨率数据计算，在卫星通信系统设计中发挥了重要作用，但并不能用于天气对全网各节点的影响分析。随着气象科技的不断进步，小时降水量预报不断精细，使得在特定通信保障任务中评估预测各节点雨衰值成为可能。在充分介绍了经典雨衰模型ITU-R和数值天气预报的基础上，从降雨率换算、降雨率平均化、雨顶高度判定三个角度出发，提出了构建基于降水预报数据雨衰预报模型的关键问题，并指出了相关改进方法。
隨著Ka頻段衛星通信產品的推廣應用，降雨衰減在衛星通信繫統中的影響越來越大。經典雨衰預測方法利用年固定時間百分比降雨率數據計算，在衛星通信繫統設計中髮揮瞭重要作用，但併不能用于天氣對全網各節點的影響分析。隨著氣象科技的不斷進步，小時降水量預報不斷精細，使得在特定通信保障任務中評估預測各節點雨衰值成為可能。在充分介紹瞭經典雨衰模型ITU-R和數值天氣預報的基礎上，從降雨率換算、降雨率平均化、雨頂高度判定三箇角度齣髮，提齣瞭構建基于降水預報數據雨衰預報模型的關鍵問題，併指齣瞭相關改進方法。
수착Ka빈단위성통신산품적추엄응용，강우쇠감재위성통신계통중적영향월래월대。경전우쇠예측방법이용년고정시간백분비강우솔수거계산，재위성통신계통설계중발휘료중요작용，단병불능용우천기대전망각절점적영향분석。수착기상과기적불단진보，소시강수량예보불단정세，사득재특정통신보장임무중평고예측각절점우쇠치성위가능。재충분개소료경전우쇠모형ITU-R화수치천기예보적기출상，종강우솔환산、강우솔평균화、우정고도판정삼개각도출발，제출료구건기우강수예보수거우쇠예보모형적관건문제，병지출료상관개진방법。
With the promotion and application of Ka-band satellite communications products,the influence of rain attenua-tion has been increasing on the satellite communication system. The rain attenuation of the fixed percentage of the time in a year is used in the prediction method of the classic rain attenuation,which plays an important role in the design of the satellite com-munication network,but it can not be used in the impact analysis of weather effects on satellite communication network. With the continuous improvement of meteorological science and technology,hour-precipitation forecast has become more and more pre-cise,that makes it possible to forecast the rain attenuation of each node during a communication support task. Basis on introducing of the classic rain attenuation model ITU-R and numerical weather prediction,start from rain rate conversion,rain rate averaged, rain top height determination,the key issues of building rain attenuation model are proposed,and the relative improved methods are given out.
