嫦娥三号落月段中欧联合测量弱信号相位估计

郝万宏; 陆明泉

doi:10.13203/j.whugis20180020

嫦娥三号落月段中欧联合测量弱信号相位估计

郝万宏^{1, 2,},
陆明泉^1, ,

1.
清华大学电子工程系, 北京, 100084
2.
北京跟踪与通信技术研究所, 北京, 100094

基金项目: 探月工程国家重大专项

详细信息

作者简介:
郝万宏, 博士, 主要从事深空探测无线电测量与信号处理技术研究。haowanhong@bittt.cn

通讯作者:
陆明泉, 博士, 教授。lumq@tsinghua.edu.cn

中图分类号: P228.5
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出版历程
- 收稿日期: 2018-07-03
- 发布日期: 2019-10-04

Phase Estimation for Inter-agency Interferometric Tracking in Chang'E-3 Powered Descent Flight

HAO Wanhong^{1, 2,},
LU Mingquan^1, ,

1.
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
2.
Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China

Funds: Chinese Lunar Exploration Program

More Information

Author Bio:
HAO Wanhong, PhD, specializes in deep space radio-metric tracking and signal processing techniques. E-mail:haowanhong@bittt.cn

Corresponding author:
LU Mingquan, PhD, professor. E-mail: lumq@tsinghua.edu.cn

摘要

摘要: 干涉测量技术对于直接获取月球和深空探测器空间方位，开展科学研究具有非常重要的意义。提出了一种利用高品质因数天线获取的探测器高动态飞行段估计信息，对远距离异地较低接收品质因数天线接收的弱信号进行补偿，进而实现弱信号窄带跟踪的方法。利用嫦娥三号动力落月段中欧联合干涉测量获取的原始数据进行了验证，结果表明，基于该方法补偿后的弱信号只需采用噪声带宽5 Hz的数字锁相环即可实现精确相位跟踪，对新诺舍站DOR（differential one-way ranging）音信号的相位估计标准差低至3.4°。该方法可应用于中国未来月球和深空探测，以及机构间干涉测量交互支持。
- 月球探测 /
- 动力飞行 /
- 弱信号 /
- 多普勒补偿 /
- 窄带跟踪
Abstract: Very long baseline interferometry plays a critical role on the orbit determination of the lunar and deep space probes, as well as the radio science research. Based on a first-order approximation model of the probe's topocentric range-rate, this paper proposes a new narrow band tracking method for the weak signal received by an antenna with relatively small aperture. As long as the Doppler dynamics has been estimated from the signal received by a large antenna with high G/T value, the weak signal, received by the small antenna during the same time duration, could be Doppler compensated. The raw data acquired by Chinese Jiamusi station and European Space Agency's New Norcia station have been processed, and the results demonstrate the effectiveness of this method. Digital phase locked loop with 5 Hz noise bandwidth could be used to track the differential one-way ranging(DOR) tone received by New Norcia, after Doppler compensation by estimation results from Jiamusi carrier tracking, and the root mean square of the tracking phase errors for DOR tone is around 3.4 degree. This method could be used in the radio metric navigation for the future lunar and deep space missions, as well as the inter-agency cross-supports.
- moon exploration /
- power flight /
- weak signal /
- Doppler compensation /
- narrow band tracking

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图 1 干涉测量基本原理示意图

Figure 1. Diagram of VLBI Tracking

下载: 全尺寸图片幻灯片

图 2 航天器干涉测量频谱结构

Figure 2. Spectrum Structure of Spacecraft VLBI

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图 3 航天器径向距离模型

Figure 3. Spacecraft Topocentric Range Model

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图 4 嫦娥三号动力落月段距离变化率

Figure 4. The Range-Rate of Chang'E-3 Power Descending

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图 5 嫦娥三号动力落月段差分站心距离变化率

Figure 5. Differential Topocentric Range-Rate of Chang'E-3 Power Descending

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图 6 嫦娥三号动力落月段载波接收频谱(1 min数据)

Figure 6. Carrier Spectrum of Chang'E-3 Power Descending (One Minute Data)

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图 7 嫦娥三号动力落月段佳木斯站载波相位跟踪结果(10 min数据)

Figure 7. Carrier Tracking Results of Chang'E-3 Power Descending in Jiamusi Station(Ten Minutes Data)

下载: 全尺寸图片幻灯片

图 8 嫦娥三号动力落月段新诺舍站载波相位跟踪误差(10 min数据)

Figure 8. Carrier Tracking Errors of Chang'E-3 Power Descending in New Norcia Station(Ten Minutes Data)

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图 9 嫦娥三号动力落月段新诺舍站+3.8 MHz DOR音处理结果

Figure 9. +3.8 MHz DOR Tone Processing Results of Chang'E-3 Power Descending Received in New Norcia Station

下载: 全尺寸图片幻灯片

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