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GUO Li, LI Jinling, WANG Guangli, HUANG Yidan, WANG Wenbin, ZHENG Weimin. Lunar Positioning of CE-5 Detectors and Precision Analysis[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20210226
Citation: GUO Li, LI Jinling, WANG Guangli, HUANG Yidan, WANG Wenbin, ZHENG Weimin. Lunar Positioning of CE-5 Detectors and Precision Analysis[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20210226

Lunar Positioning of CE-5 Detectors and Precision Analysis

doi: 10.13203/j.whugis20210226
Funds:

The National Natural Science Foundation of China (11873076)

  • Received Date: 2021-05-15
  • Combination of ascender and lander and ascender of CE-5 detectors successively landed on the moon successfully. The mission and landing modes of these two detectors are different, so we use different methods to determine their landing positions. The lunar positions are obtained with the combined the data from UXB (Unified X-band) tracking network and VLBI (Very Long Baseline Interferometry) network. The method of joint statistical positioning is investigated to determine CE-5 combination of ascender and lander. Although data precision between the data-transmission signal and side-tone signal of DOR(Differential of Range) is marked, their effects on the positioning are not significant. Longer scale of observation data help improving the position precision, but the total length of 1 hour satisfies the accuracy requirements. The kinematic statistical method by polynomial fitting is used to determine the landing trajectory and the lunar position of CE-5 ascender, and is compared with the point positioning method. Their differences are better than 40m. The landing moment of CE-5 ascender is also calculated to millisecond accuracy. Our method will provide a valuable reference for the lunar positioning of detectors in the future Phase IV of Chinese lunar project.
  • [1] (马茂莉,郑为民,黄逸丹,等.嫦娥三号探测器DOR信号本地相关处理与定轨验证[J].中国科学(物理学力学天文学), 2017, 47(2):100-108)

    Ma Maoli, Zheng Weimin, Huang Yidan, et al.Local Correlation and Orbit Determination for DOR Signals in Chang'E-3[J].SCIENTIA SINICA Physica, Mechanica&Astronomica, 2017, 47(2):100-108
    [2] He Q B, Liu Q H, Zheng X.Chang'E-3 Spacecraft Surface Reflection Causes Turbulence on VLBI Delay[J].Radio Science, 2017, 52(2):235-247
    [3] He Q B, Liu Q H, Li P J, et al.SNR Periodical Variation of Chang'E-3 Spacecraft Orbiting the Moon[J].Chinese Journal of Aeronautics, 2016, 29(2):470-478
    [4] He Q B, Yang Y Z, Li F, et al.Using Cross Correlation to Estimate Doppler Frequency[J].Advances in Space Research, 2020, 65(7):1772-1780
    [5] (李培佳,胡小工,黄勇,等.运动学统计定轨法应用于CE-1落月轨迹确定[J].天文学进展, 2010, 28(3):290-300)

    Li Peijia, Hu Xiaogong, Huang Yong, et al.Kinematic Statistical Method Using in the Orbit Determination of CE-1[J].Progress in Astronomy, 2010, 28(3):290-300
    [6] Duev D A, Molera Calvés G, Pogrebenko S V, et al.Spacecraft VLBI and Doppler Tracking:Algorithms and Implementation[J].Astronomy&Astrophysics, 2012, 541:A43
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Lunar Positioning of CE-5 Detectors and Precision Analysis

doi: 10.13203/j.whugis20210226
Funds:

The National Natural Science Foundation of China (11873076)

Abstract: Combination of ascender and lander and ascender of CE-5 detectors successively landed on the moon successfully. The mission and landing modes of these two detectors are different, so we use different methods to determine their landing positions. The lunar positions are obtained with the combined the data from UXB (Unified X-band) tracking network and VLBI (Very Long Baseline Interferometry) network. The method of joint statistical positioning is investigated to determine CE-5 combination of ascender and lander. Although data precision between the data-transmission signal and side-tone signal of DOR(Differential of Range) is marked, their effects on the positioning are not significant. Longer scale of observation data help improving the position precision, but the total length of 1 hour satisfies the accuracy requirements. The kinematic statistical method by polynomial fitting is used to determine the landing trajectory and the lunar position of CE-5 ascender, and is compared with the point positioning method. Their differences are better than 40m. The landing moment of CE-5 ascender is also calculated to millisecond accuracy. Our method will provide a valuable reference for the lunar positioning of detectors in the future Phase IV of Chinese lunar project.

GUO Li, LI Jinling, WANG Guangli, HUANG Yidan, WANG Wenbin, ZHENG Weimin. Lunar Positioning of CE-5 Detectors and Precision Analysis[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20210226
Citation: GUO Li, LI Jinling, WANG Guangli, HUANG Yidan, WANG Wenbin, ZHENG Weimin. Lunar Positioning of CE-5 Detectors and Precision Analysis[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20210226
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