GEO卫星点波束覆盖算法的研究与应用  

Research and Application of GEO Satellite Spot-beam Covering Algorithm

作　　者：董彦磊[1] 汪春霆[1] 孙巍 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北华铁运输有限责任公司,河北石家庄050051

出　　处：《无线电通信技术》2016年第4期83-86,共4页Radio Communications Technology

基　　金：国家高技术研究发展计划(863计划)项目(ZX151140016)

摘　　要：GEO卫星点波束覆盖范围准确计算在实际工程应用中需求日益迫切,针对GEO卫星点波束覆盖特点,提出点波束平面覆盖和点波束球面覆盖计算方法。点波束平面覆盖计算是将地球看成一个平面利用平面几何公式计算点波束覆盖范围,点波束球面覆盖计算是将地球看成一个球体利用球面立体几何公式计算点波束覆盖范围。通过仿真、分析与比较,当点波束半功率角θ3d B较小时平面覆盖计算和球面覆盖计算精度都较高,当半功率角θ3d B较大时平面覆盖计算偏差明显增大,球面覆盖计算精度一直保持在较高水平。Accurately calculating GEO satellite spot- beam coverage is demanded increasingly in the actual engineering applications.In view ofthe features of spot-beam coverage,this paper presents the algorithm of spot-beam plane coverage and spot- beam spherical coverage.The algorithm of spot-beam plane coverage takes the Earth as a flat to calculate spot-beam coverage with plane geometry formulas,and the algorithm of spot-beam sphere coverage takes the Earth as a sphere to calculate spot-beam coverage with three-dimensional geometry formulas.Through simulation, analysis and comparison, when the half-power angle of spot-beam is smaller,both plane coverage algorithm and spot-beam spherical coverage algorithm have high accuracy of calculation.When the half- power angle of spot-beam is bigger, the calculated deviation of spot-beam plane coverage algorithm increases significantly, however the calculation accuracy of spot-beam spherical coverage algorithm maintains at a high level.

关 键 词：GEO卫星 点波束 平面覆盖 球面覆盖 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]