匹配滤波方法在非相干散射雷达测量空间碎片中的应用

利用2010年3月25日欧洲非相干散射雷达的常规电离层探测数据, 分析了实测数据中接收功率突变的现象. 高度发生在500 km以上的功率突变一般不是由于地球物理影响产生的, 而要归因于卫星或空间碎片. 采用匹配滤波方法实现了对空间碎片的探测和提取, 利用相干积累的方法提高了信噪比, 共获得363个碎片, 得到了碎片随高度和时间的分布. 结果表明, 碎片高度分布主要集中在800 km左右, 与欧洲非相干散射组织现有的碎片数据具有一致性. 

Match Function Method for Space Debris Detection Using Incoherent Scatter Radar

Beam-park experiments done by powerful and highly sensitive radar allow us to gain insight into the debris population.But any cost-effective approach demands a multi-use concept where the system can be reconfigured easily to perform a variety of different tasks.In this paper we present a flexible digital signal process method for space debris measurements using the conventional ionospheric data.Based on the conventional ionospheric data obtained by European incoherent scatter radar on 25 March 2010,the "mutation" phenomenon of the sounding data power was studied. Generally,the "mutation" power in more than 500 km is not produced by geophysical effects,but due to satellites or space debris.Matched filtering method was used to achieve the space debris detection and the debris’s character extraction,and the signal to noise ratio is improved by using coherent accumulation method.A total of 363 pieces were captured,and the distribution of debris with height and time has been obtained.The result shows that the debris was concentrated in the height of 800 km,and the distribution of debris with height was consistent with the results of European Incoherent Scatter organizations.