基于调频广播信号的空间碎片探测方法  

A Method of Detecting Space Debris with FM Radio Signals

作　　者：张翔[1,2,3,4] HANCOCK Paul[4] WAYTH Randall 季江徽 马月华 ZHANG Xiang;HANCOCK Paul;WAYTH Randall;JI Jiang-hui;MA Yue-hua(Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008;Key Laboratory of Planetary Sciences,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008;University of Chinese Academy of Sciences,Beijing 100049;International Centre for Radio Astronomy Research,Curtin University,Perth WA6102)

机构地区：[1]中国科学院紫金山天文台,南京210008 [2]中国科学院行星科学重点实验室,南京210008 [3]中国科学院大学,北京100049 [4]International Centre for Radio Astronomy Research, Curtin University

出　　处：《天文学报》2018年第5期109-121,共13页Acta Astronomica Sinica

基　　金：国家留学基金项目(201504910639);国家自然科学基金项目(11773081;11473073;11573075;11661161013);江苏省自然科学基金项目(BK20141509);紫金山天文台小行星基金会资助

摘　　要：空间碎片对人造卫星和飞船的威胁日益增长.为了保持一个安全的空间环境,需要寻找成本低而又准确的空间天体探测和追踪方法.前些年,使用射电望远镜作为被动雷达,探测空间碎片反射的调频广播信号的可能性已经被讨论过,并且月球和国际空间站反射的信号已经被默奇森大视场射电阵(MWA)探测到.介绍MWA探测到的卫星反射广播信号事件,论证MWA有能力探测600 km高度处0.1 m量级大小的空间碎片,位置误差在10 km左右.Space debris is an increasing threat to active satellites and spacecrafts,and accurate and affordable tracking of space objects is necessary to maintain a safe space environment.Previously,the possibilities of using radio telescopes as passive radars to detect reflected Frequency Modulation(FM)signals from space debris are discussed,and reflections from the Moon and the International Space Station(ISS)were detected using the Murchison Widefield Array(MWA).In this paper,detections of transient events caused by reflections from satellites with the MWA are reported,demonstrating the ability of the MWA to detect space debris on scales as small as 0.1 m at 600 km distance.The error in position is about 10 km.

关 键 词：射电连续辐射:普通 空间碎片 技术:干涉 

分 类 号：P161[天文地球—天文学]