Estimation of gravity anomaly in the lunar far-side from VLBI and 4-Way Doppler data

根据 VLBI 和四路多普勒数据估计月球背面的重力异常

• 批准号: 15340151
• 负责人: KAWANO Nobuyuki
• 金额: $ 2.75万
• 依托单位: National Astronomical Observatory of Japan
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340151/
• 关键词: Doppler frequency; VLBI; Lunar gravity field; Gravity anomaly; Lunar explorer; SELENE; dichotomy of the Moon; 月; 4-Wayドプラー; 月裏側; 内部構造; 相対VLBI

The lunar far-side is covered by highland although the lunar near side consists of basins. This differentiation is called dichotomy. If the dichotomy is shown not only in the surface but also the lithosphere, new knowledge are given about the thermal history of the Moon. The geodetic measurement, objective of this research, provides us the internal structure such as lithosphere of the Moon. Two new methods of 4-Way Doppler and differential VLB I are applied to the Japanese lunar explorer SELENE for the geodetic measurements of the Moon. Instruments and software are developed for the measurements. Research results for 3 years are shown bellow.(1)A 4-way Doppler method was completed by using a relay satellite. This method enables Doppler measurement of the far-side for the first time.(2)A Differential VLBI method was completed. It has potential to determine the position of a satellite with an accuracy of 20cm around the Moon.(3)Reduction and analysis software for data that SELENE will obtain was developed. The lunar gravity anomaly can be estimated by this software.(4)Future plans were also investigated to explore the lunar internal structure.

月球背面被高地覆盖，而月球背面则是盆地。这种分化称为二分法。如果这种二分法不仅表现在月球表面，而且表现在岩石圈，那么我们就可以对月球的热历史有新的认识。本研究的主要目的是通过大地测量提供月球岩石圈等内部结构。本文介绍了四向多普勒和差分VLB Ⅰ两种新的月球大地测量方法在日本月球探测器SELENE上的应用。仪器和软件开发的测量。三年来的研究成果如下。(1)A利用中继卫星完成了四向多普勒方法。该方法首次实现了远侧的多普勒测量。(2)A完成了差分VLBI方法。它有可能以20厘米的精度确定卫星在月球周围的位置。（3）开发了SELENE数据处理与分析软件。利用该软件可以估算月球重力异常。（4）还研究了未来探索月球内部结构的计划。

项目成果

月探査機SELENEの2衛星による同一ビーム相対VLBI観測技術

月球探测器SELENE两颗卫星同波束相对VLBI观测技术

• 发表时间: 2006
• 期刊: 電子情報通信学会論文誌 B 89JB・4
• 作者: Masanori Nishio;Liu Qinghui;劉 慶会
• 通讯作者: 劉 慶会

Statistical characteristics of atmospheric phase fluctuations observed by a VLBI system using a beacon wave from a geostationary satellite

VLBI系统利用静止卫星信标波观测到的大气相位涨落的统计特征

• 发表时间: 2005
• 期刊: IEEE Trans., Antenna and Propa., 53・4
• 作者: LIU;Qinghui
• 通讯作者: Qinghui

Ground-base verification of four-way Doppler measurement for the SELENE mission

SELENE 任务四向多普勒测量的地面验证

• 发表时间: 2004
• 期刊: IAG Symposia 128
• 作者: 劉 慶会;河野宣之他;Iwata Takahiro;Hanada Hideo.;Noda Hirotomo
• 通讯作者: Noda Hirotomo

浅利一善, 河野裕介, 岩田隆浩, 米倉克英, 高野忠, 河野宣之: "2衛星折り返しリンクの同期状態の新しい監視法"電子情報通信学会論文誌. B J86-B. 1228-2335 (2003)

Kazuyoshi Asari、Yusuke Kono、Takahiro Iwata、Katsuhide Yonekura、Tadashi Takano、Nobuyuki Kono：“两卫星环回链路同步状态的新监测方法”，电子信息与通信工程师学会汇刊 B J86-B。 1228-2335 (2003)

Research and Developments for e-VLBI Utilizing Global High Speed Network Connections,

利用全球高速网络连接进行 e-VLBI 的研究和开发，

• 发表时间: 2005
• 期刊: Journal of National Institute of Information and Communications Technology 52
• 作者: Hanada H.;Iwata;T.;Namiki;N.;Kawano;N.;Asari;K.;Ishikawa;T.;Kikuchi;F.;Liu;Q.;Matsumoto;K.;Noda;K.;Ping;J.;Tsuruta;S.;Iwadate;K.;Kameya;O.;Kuji;S.;Tamura;Y.;Hong;X.;Aili;Y.;Gusev A.N.Kawano et al.;Yasuhiro Koyama
• 通讯作者: Yasuhiro Koyama