共查询到18条相似文献,搜索用时 687 毫秒
1.
俄罗斯应用天文研究所月球历表研究现状 总被引:1,自引:1,他引:0
空间探测需要越来越高精度的观测和历表支持。俄罗斯科学院应用天文研究所研发了满足精度要求的月球历表EPM-ERA,它与同期的法国INPOP历表和美国DE历表比较,精度方面有微小差距。分析了进一步提高历表精度的方法。然而EPM-ERA仅仅依赖于法国和美国台站提供的月球激光测距LLR数据,为了克服这个限制,应用天文研究所在推进俄罗斯西伯利亚阿尔塔伊LLR地面站的重建任务,以改善LLR测站分布的几何构型。俄罗斯的月球-全球和月球-资源探月计划为改进月球历表提供了机会,参与了多次国际深空探测的俄罗斯VLBI网"QUASAR"也将参与这些俄罗斯月球探测计划的精密测轨跟踪。 相似文献
2.
3.
双层结构月球的自由天平动与受迫天平动 总被引:1,自引:1,他引:0
根据JPL/NASA发布的月球行星历表DE430/LE430提供的月球物理参数,计算了月球主转动惯量;使用刚体月球转动微分方程获得的月球物理天平动解析关系式,计算了不同分层模型的月球自由天平动三个模式的频率及周期,比较并讨论了不同的解析结果;在此基础上,评估了月球受迫天平动一个模式的幅度。 相似文献
4.
□□深空(deepspace)的基本含义是相对于近空(nearspace)而言的,通常“深空”是指月球和月球以外的宇宙空间。根据探测的不同对象和区域,深空探测可分为日地空间探测、月球探测和行星探测。其中,月球探测是初期深空探测的重点。1深空的定义目前国际宇航界对深空的概念仍时有争论,国际电信联盟(ITU)作为国际无线电管理方面的权威机构,在其核心管理文件《无线电规则》中明确规定了深空的定义(第1.177款)。所谓深空,是指与地球的距离大于或等于2×106km的空间。ITU这样做的目的是为了规范无线电频率的使用,确保无线电频率资源合理而有序地得… 相似文献
5.
深空探测承载着人类航天技术发展、探索宇宙奥秘和寻找地外生命及人类宜居地的重任,成为各航天大国关注的热点。我国月球与深空探测虽然起步晚,但起点高,正在追赶并将实现领先。简要回顾了我国月球及深空空间环境探测的载荷情况、数据结果、理论和应用研究成果,简述了当前在研的自主火星空间环境探测目标以及规划中的未来深空探测任务,并根据当前国际发展态势,及我国在研、规划中的月球及深空探测任务情况,分析了我国月球及深空空间环境探测的关键科学问题、载荷技术发展趋势、理论与模拟的研究需求,最后对深空环境探测进行了展望。 相似文献
6.
中国深空网的建立用以支持我国正在实施的探月工程及后续火星、小行星、木星等探测任务。为验证中国深空网的跟踪测量能力,并获取行星无线电测量数据,基于中国深空站开展了对木星在轨探测器"朱诺号"(Juno)的跟踪测量试验与数据处理分析。在分析各种观测约束条件的基础上,首次实现了中国深空站在地—木距离上的深空探测器开环跟踪测量,通过VLBI数据采集记录终端原始探测器信号,经信号处理提取"朱诺号"探测器的主载波频率。采用傅里叶变换(Fast Fourier Transform,FFT)、线性调频Z变化及信号本地重构相关的联合信号处理方法,"朱诺号"探测器主载波频率提取噪声水平在10μHz水平,有效验证了深空开环测量技术,为后续我国深空探测任务积累了有益经验。 相似文献
7.
8.
针对我国后续月球极区探测、小天体探测、火星探测、木星系探测深空探测重点任务,在梳理分析每个探测任务约束的基础上,提出电源系统的具体需求;对上述4个方向的深空探测任务的电源系统需求进行归纳总结,提出我国后续深空探测任务的电源系统主要发展建议,具体包括宽温度和光强适应性、抗辐照的太阳电池阵,轻小型智能化的电源控制装置,高功率密度的电源系统MPPT拓扑;最后对同位素温差发电技术进行了发展展望,为后续深空探测电源系统研究和设计提供参考。 相似文献
9.
10.
研究了国外深空测控无线电测距和测速的最新进展,包括欧洲空间局(European Space Agency,ESA)和美国航空航天局(National Aeronautics and Space Administration,NASA)的深空测控系统测量精度提升计划。结合总体单位的X频段试验测试数据,分析了目前我国深空测控系统无线电测距测速现状,从测量设备层面以及空间传输等方面,包括目前深空站采用的超窄带锁相环以及提高到500 kHz的测距主音等措施,对测距测速的误差源进行了分析,探讨了测距和测速精度提升的主要制约因素。结合我国深空测控系统发展规划,给出了后续深空测控无线电测量的发展建议,结合相关课题研究成果,重点分析了多频链路和实时标校技术的可行性及具体效果。 相似文献
11.
12.
China has carried out four unmanned missions to the Moon since it launched Chang'E-1, the first lunar orbiter in 2007. With the implementation of the Chang'E-5 mission this year, the three phases of the lunar exploration program, namely orbiting, landing and returning, have been completed. In the plan of follow-up unmanned lunar exploration missions, it is planned to establish an experimental lunar research station at the lunar south pole by 2030 through the implementation of several missions, laying a foundation for the establishment of practical lunar research station in the future. China successfully launched its first Mars probe on 23 July 2020, followed in future by an asteroid mission, second Mars mission, and a mission to explore Jupiter and its moons. 相似文献
13.
China's Planning for Deep Space Exploration and Lunar Exploration before 2030 总被引:2,自引:1,他引:1 下载免费PDF全文
The current lunar exploration has changed from a single scientific exploration to science and resource utilization. On the basis of the previous lunar exploration, Chinese scientists and technical experts have proposed an overall plan to preliminarily build a lunar research station on the lunar South Pole by several missions before 2035, exploring of the moon, as well as the use of lunar platforms and in-site utilization of resources. In addition, China will also explore Mars, asteroids and Jupiter and its moons. This paper briefly introduces the ideas of Chinese scientists and technical experts on the lunar and deep space exploration. 相似文献
14.
Von R. Eshleman David P. Hinson Gunnar F. Lindal G. Leonard Tyler 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1987,7(12):29-32
Measurements of radio waves that have propagated through planetary atmospheres have provided exploratory results on atmospheric constituents, structure, dynamics, and ionization for Venus, Mars, Titan, Jupiter, Saturn, and Uranus. Highlights of past results are reviewed in order to define and illustrate the potential of occultation and related radio studies in future planetary missions. 相似文献
15.
16.
17.
C de Bergh 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1995,15(3):427-440
Recent progress on measurements of isotopic ratios in planetary or satellite atmospheres include measurements of the D/H ratio in the methane of Uranus, Neptune and Titan and in the water of Mars and Venus. Implications of these measurements on our understanding of the formation and evolution of the planets and satellite are discussed. Our current knowledge of the carbon, nitrogen and oxygen isotopic ratios in the atmospheres of these planets, as well as on Jupiter and Saturn, is also reviewed. We finally show what progress can be expected in the very near future due to some new ground-based instrumentation particularly well suited to such studies, and to forthcoming space missions. 相似文献
18.
Four future missions for deep space exploration and future space-based exoplanet surveys on habitable planets by 2030 are scheduled to be launched. Two Mars exploration missions are designed to investigate geological structure, the material on Martian surface, and retrieve returned samples. The asteroids and main belt comet exploration is expected to explore two objects within 10 years. The small-body mission will aim to land on the asteroid and get samples return to Earth. The basic physical characteristics of the two objects will be obtained through the mission. The exploration of Jupiter system will characterize the environment of Jupiter and the four largest Moons and understand the atmosphere of Jupiter. In addition, we further introduce two space-based exoplanet survey by 2030, Miyin Program and Closeby Habitable Exoplanet Survey (CHES Mission). Miyin program aims to detect habitable exoplanets using interferometry, while CHES mission expects to discover habitable exoplanets orbiting FGK stars within 10 pc through astrometry. The above-mentioned missions are positively to achieve breakthroughs in the field of planetary science. 相似文献