摘要
我国将于2020年发射由环绕器和着陆巡视器组成的火星探测器,需要利用大型射电望远镜进行跟踪.本文对大型射电望远镜的火星探测器跟踪技术进行了分析,并实际利用上海65 m射电望远镜跟踪火星探测器进行了测试验证.分析和测试结果表明,大型射电望远镜跟踪火星探测器时需要考虑和改正座架热变形、大气折射、光行时等引起的指向偏差.不考虑下行单程光行时的接收功率比考虑时降低约0.8 dB.在俯仰指向偏差为36′′和72′′时接收能力分别降低约0.8和3.5 dB.这些研究成果对我国的首次火星探测任务的顺利实施有重要的应用价值.
In 2020,China will launch a Mars spacecraft composed of an orbiter and lander/rover.In this paper,the tracking techniques of the Mars spacecraft for a large radio telescope are analyzed and verified using the Shanghai 65 m radio telescope(Tianma telescope).The measurement results indicate that the pointing error caused by thermal deformation of the antenna body,atmospheric refraction,and the light-time effect should be considered when a large radio telescope is used to track the Mars spacecraft.When the light-time effect is not taken into account,the receiving power is reduced by approximately 0.8 dB.When the elevation offset is 36 and 72 arcsec,the reception capacity of the Tianma telescope is reduced by approximately 0.8 and 3.5 dB,respectively.The results of this study thus have important implications for the Mars exploration.
作者
刘庆会
赵融冰
舒逢春
贺庆宝
郑鑫
马茂莉
付丽
吴亚军
虞林峰
Qinghui LIU;Rongbing ZHAO;Fengchun SHU;Qingbao HE;Xin ZHENG;Maoli MA;Li FU;Yajun WU;Linfeng YU(Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China)
出处
《中国科学：信息科学》
CSCD
北大核心
2019年第6期775-782,共8页
Scientia Sinica(Informationis)
基金
国家自然科学基金(批准号:11473059,11773060)
天文专项(高精度测量和控制系统研究)
上海市导航与定位重点实验室(批准号:3912DZ227330001)资助项目
关键词
射电望远镜
火星探测器
跟踪
光行时
指向偏差
radio telescope
Mars spacecraft
tracking
light time
pointing offset
