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实时VLBI处理机技术

郑为民 张娟 徐志骏 刘磊 童力 张秀忠

郑为民, 张娟, 徐志骏, 刘磊, 童力, 张秀忠. 实时VLBI处理机技术[J]. 深空探测学报(中英文).
引用本文: 郑为民, 张娟, 徐志骏, 刘磊, 童力, 张秀忠. 实时VLBI处理机技术[J]. 深空探测学报(中英文).
ZHENG Weimin, ZHANG Juan, XU Zhijun, LIU Lei, TONG Li, ZHANG Xiuzhong. Real-Time VLBI Technologies in Chinese Lunar Exploration[J]. Journal of Deep Space Exploration.
Citation: ZHENG Weimin, ZHANG Juan, XU Zhijun, LIU Lei, TONG Li, ZHANG Xiuzhong. Real-Time VLBI Technologies in Chinese Lunar Exploration[J]. Journal of Deep Space Exploration.

实时VLBI处理机技术

基金项目: 国家自然科学基金资助项目(11973011,11573057,11803070);国家基础科学数据共享服务平台资助项目(DKA2017-12-02-09);中科院空间科学预研资助项目(XDA15016100);上海市空间导航与定位技术重点实验室资助项目(15DZ2271700,ZZXT-201902);中科院关键技术人才资助项目;上海市领军人才资助项目;国家万人计划资助项目;探月工程资助项目
详细信息
    作者简介:

    郑为民(1970– ),男,研究员,博士生导师,主要研究方向:VLBI高速信号处理及其应用。通讯地址:上海市南丹路80号上海天文台(200030)电话:(021)34775501 E-mail:zhwm@shao.ac.cn

    张娟(1979– ),女,高级工程师,硕士生导师,主要研究方向:射电天文数据处理方法及高性能计算。通讯地址:上海市南丹路80号上海天文台(200030)电话:(021)34775430 E-mail:zhangjuan@shao.ac.cn

  • ● The software correlator and hardware one are used to construct the main and standby related correlators to improve the system reliability. ● The correlator system is capable of real-time processing of the radio source and probe signals,and the total delay of the correlator is less than 25 seconds. ● When the prediction delay model error of the probe correlator is not very accurate,the special real-time fringe search module can be used to reconstruct the high-precision delay model to guide the correlation processing.
  • 中图分类号: P164

Real-Time VLBI Technologies in Chinese Lunar Exploration

  • 摘要: 实时相关处理机是探月工程VLBI测轨分系统数据处理中心的核心设备。软件处理机是自主开发的实时并行信号处理软件,运行于CPU+GPU结构的高性能集群服务器平台。硬件处理机是基于大规模FPGA器件研制的专用高速信号处理机。它们均采用FX型结构,具备数据实时接收、解码、相关处理、相位校正信号提取、实时监视等功能。当探测器预报时延模型精度不够时,处理机系统加入了可通过特殊的条纹搜索功能,现场实时自主重构高精度时延模型,引导处理机完成探测器信号相关处理。经过工程验证,月球探测器VLBI测定轨的实时数据速率达到了512 Mbps。
    Highlights
    ● The software correlator and hardware one are used to construct the main and standby related correlators to improve the system reliability. ● The correlator system is capable of real-time processing of the radio source and probe signals,and the total delay of the correlator is less than 25 seconds. ● When the prediction delay model error of the probe correlator is not very accurate,the special real-time fringe search module can be used to reconstruct the high-precision delay model to guide the correlation processing.
  • 图  1  软件处理机内部结构框图

    Fig.  1  Structure of software correlator

    图  2  IO与计算并行处理示意图

    Fig.  2  Diagram of IO and computing in parallel processing

    图  3  GPU算法流程图

    Fig.  3  GPU algorithm flowchart

    图  4  探月工程软件处理机运行平台

    Fig.  4  The platform of software correlator in

    图  5  Uniboard硬件相关处理机

    Fig.  5  The hardware correlator based on Uniboard

    图  6  基于Uniboard硬件相关处理机系统框图

    Fig.  6  The diagram of hardware correlator based on Uniboard

    图  7  Uniboard硬件相关处理机原理框图

    Fig.  7  The schematic diagram of hardware correlator based on Uniboard

    图  8  软件处理机启用条纹搜索功能前后效果对比

    Fig.  8  The comparison of the results from the software correlator before and after using fringe search

    图  9  采用软件处理机用相位参考方式获取的CE-3巡视器在A、B、C、D、E点处的成图结果,巡视器相对位置精度精度在1m

    Fig.  9  The mapping results of the CE-3 Rover at points A,B,C,D and E obtained by the software correlator using phase reference method show that the relative position accuracy of the Rover is about 1m

    表  1  “嫦娥4号”软件相关处理性能指标

    Table  1  Performance index of Chang'E-4 software

    项目指标
    数据处理能力6台站,256 Mbps/台站
    通道数2、4、8、16
    原始数据格式Mark5A/B,VDIF,RDF等
    双目标处理实时、事后
    量化比特1、2、4、8、16
    FFT点数64~16 384
    积分时间/s≈1,可调
    数据处理最大滞后时间/s25
    探测器条纹搜索及模型重构实时、事后
    提取相位参考信号事后
    下载: 导出CSV

    表  2  “嫦娥4号”硬件相关处理性能指标

    Table  2  Performance index of chang'e-4 hardware

    项目指标
    最大台站数6
    每测站最大数据速率256 Mbps
    通道数1,2,4,8,16,32
    量化比特数1,2,4,8
    FFT点数64~16 384
    积分时间≈1 s,可调
    数据处理最大滞后时间25 s
    下载: 导出CSV

    表  3  历次探月任务的VLBI观测数据率与实时性

    Table  3  VLBI data rate and real-time performance of previous lunar missions

    任务数据率/Mbps实时性要求/min实际性能
    CE-116< 10< 6 min
    CE-232 < 10 < 4 min
    CE-364 < 1 < 40 s
    CE-5T164 < 1 < 40 s
    CE-4128< 1< 40 s
    下载: 导出CSV
  • [1] 吴伟仁,刘继忠,唐玉华,等. 中国探月工程[J]. 深空探测学报,2019,6(5):405-416.

    WU W R,LIU J Z,TANG Y H,et al. China lunar exploration program[J]. Journal of Deep Space Exploration,2019,6(5):405-416.
    [2] 洪晓瑜,张秀忠,郑为民,等. VLBI技术及其在中国探月工程的应用[J]. 深空探测学报,2020,7(4):1-10.

    HONG X Y,ZHANG X Z,ZHENG W M,et al. The research of VLBI technology and application in China lunar exploration project[J]. Journal of Deep Space Exploration,2020,7(4):1-10.
    [3] 陈明,唐歌实,曹建峰,等. 嫦娥一号绕月探测卫星精密定轨实现[J]. 武汉大学学报,2011,36(2):212-217.

    CHENG M,TANG G S,CHAO J F,et al. Precision Orbit Determination of CE-1 Lunar Satellite[J]. Geomatics and Information Science of Wuhan University,2011,36(2):212-217.
    [4] LI P J,HU X G,HUANG Y,et al. Orbit determination for Chang’E-2 lunar probe and evaluation of lunar gravity models[J]. Science China Physics Mechanics Astronomy,2012,55(3):514-522. doi:  10.1007/s11433-011-4596-2
    [5] 陈明,张宇,曹建峰,等. 嫦娥二号卫星轨道确定与测轨技术[J]. 科学通报,2012,57(9):689-696.

    CHENG M,ZHANG Y,CHAO J F,et al. Orbit determination and tracking technology of CE-2 satellite[J]. Chinese Science Bulletin,2012,57(9):689-696.
    [6] 黄勇,昌胜骐,李培佳,等. “嫦娥三号”月球探测器的轨道确定和月面定位[J]. 科学通报,2014,59(23):2268-2277.

    HUANG Y,CHANG S Q,LI P J,et al. Orbit determination of Change’E-3 and positioning of the lander and the rover[J]. Chinese Science Bulletin,2014,59(23):2268-2277.
    [7] THOMPSONAR M, SWENSON G. Interferometry and synthesis in radio astronomy[M]. NewYork: Wiley G Interscience Publication, 2001.
    [8] 刘磊,郑为民,张娟,等. 中国VLBI网软件相关处理机测地应用精度分析[J]. 测绘学报,2017,46(7):805-814. doi:  10.11947/j.AGCS.2017.20160600

    LIU L,ZHENG W M,ZHANG J,et al. Precision analysis of Chinese VLBI network software correlator for geodetic application[J]. Acta Geodaetica et Cartographica Sinica,2017,46(7):805-814. doi:  10.11947/j.AGCS.2017.20160600
    [9] 郑为民,舒逢春,张冬. 应用于深空跟踪测量的VLBI软件相关处理技术[J]. 宇航学报,2008,29(1):18-23. doi:  10.3873/j.issn.1000-1328.2008.01.003

    ZHENG W M,SHU F C,ZHANG D. Application of software correlator to deep space VLBI Tracking[J]. Journal of Astronautics,2008,29(1):18-23. doi:  10.3873/j.issn.1000-1328.2008.01.003
    [10] 梁世光,黄心永. S-2 VLBI相关处理系统[J]. 上海天文台年刊,1991,12:114-126.

    LIANG S G,HUANG X Y. S-2 VLBI data correlation system[J]. Annals of Shanghai Observatory Academia Sinica,1991,12:114-126.
    [11] KEIMPEMA A,KETTENIS M M,POGREBENKO SV,et al. The SFXC software correlator for very long baseline interferometry:algorithms and implementation[J]. Experimental Astronomy,2015,39(2):259-279. doi:  10.1007/s10686-015-9446-1
    [12] DELLER A T,TINGAY S J,BAILES M,et al. DiFX:A software correlator for very long baseline interferometry using multiprocessor computing environments[J]. Publications of the Astronomical Society of the Pacific,2007,119(853):318-336. doi:  10.1086/513572
    [13] DELLER A T,BRISKEN W F,PHILLIPS C J,et al. DiFX-2:a more flexible,efficient,robust,and powerful software correlator[J]. Publications of the Astronomical Society of the Pacific,2011,123(901):275-287.
    [14] LIKHACHEV S F,KOSTENKO V I,GIRIN I A,et al. Software correlator for radioastron mission[J]. Journal of Astronomical Instrumentation,2017,6:1750004.
    [15] LEE S S,CHUNG S O,RON D G,et al. A new hardware correlator in korea:performance evaluation using KVN observations[J]. Journal of the Korean Astronomical Society,2015(48):125-137.
    [16] 韩松涛,唐歌实,陈略,等. 中国深空网VLBI相关处理器开发与应用[J]. 工程研究—跨学科视野中的工程,2015,7(1):45-49.

    HAN S T,TANG G S,CHEN L,et al. Development and application of correlator in interferometric tracking center of China DSN[J]. Journal of Engineering Studies,2015,7(1):45-49.
    [17] ZHANG J, ZHENG W M, TONG L, et al. HPC-Enhanced Software Correlator in Chinese VLBI network[C]//2015 Eighth International Conference on Internet Computing for Science and Engineering(ICICSE). Harbin, China: IEEE, 2015.
    [18] 郭迎,郑为民. 一种高性能VLBI数据预处理方法及其软件实现[J]. 中国科学院上海天文台年刊,2013(34):114-122.

    GUO Y,ZHENG W M. A high-performance VLBI data preprocessing method and its software implementation[J]. Annals of Shanghai Observatory Academic Sinica,2013(34):114-122.
    [19] 杨艳,郑为民. VLBI相位校正信号提取的软件实现方法[J]. 中国科学院上海天文台年刊,2006(27):107-117.

    YANG Y,ZHENG W M. Software realization method of extracting vlbi phase calibration signal[J]. Annals of Shanghai Observatory Academic Sinica,2006(27):107-117.
    [20] NICK J,RICARD A,ZHANG J,et al. Implementation of an ESA delta-DOR capability[J]. Acta Astronautica,2009(64):1041-1049.
    [21] 童锋贤,郑为民,舒逢春. VLBI相位参考成像方法用于玉兔巡视器精确定位[J]. 科学通报,2014,59(34):3362-3369. doi:  10.1360/N972014-00578

    TONG F X,ZHENG W M,SHU F C. Accurate relative positioning of Yutu lunar rover using VLBI phase-referencing mapping technology[J]. Chinese Science Bulletin,2014,59(34):3362-3369. doi:  10.1360/N972014-00578
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出版历程
  • 收稿日期:  2020-05-23
  • 修回日期:  2020-06-20
  • 网络出版日期:  2020-10-09

实时VLBI处理机技术

    基金项目:  国家自然科学基金资助项目(11973011,11573057,11803070);国家基础科学数据共享服务平台资助项目(DKA2017-12-02-09);中科院空间科学预研资助项目(XDA15016100);上海市空间导航与定位技术重点实验室资助项目(15DZ2271700,ZZXT-201902);中科院关键技术人才资助项目;上海市领军人才资助项目;国家万人计划资助项目;探月工程资助项目
    作者简介:

    郑为民(1970– ),男,研究员,博士生导师,主要研究方向:VLBI高速信号处理及其应用。通讯地址:上海市南丹路80号上海天文台(200030)电话:(021)34775501 E-mail:zhwm@shao.ac.cn

    张娟(1979– ),女,高级工程师,硕士生导师,主要研究方向:射电天文数据处理方法及高性能计算。通讯地址:上海市南丹路80号上海天文台(200030)电话:(021)34775430 E-mail:zhangjuan@shao.ac.cn

  • ● The software correlator and hardware one are used to construct the main and standby related correlators to improve the system reliability. ● The correlator system is capable of real-time processing of the radio source and probe signals,and the total delay of the correlator is less than 25 seconds. ● When the prediction delay model error of the probe correlator is not very accurate,the special real-time fringe search module can be used to reconstruct the high-precision delay model to guide the correlation processing.
  • 中图分类号: P164

摘要: 实时相关处理机是探月工程VLBI测轨分系统数据处理中心的核心设备。软件处理机是自主开发的实时并行信号处理软件,运行于CPU+GPU结构的高性能集群服务器平台。硬件处理机是基于大规模FPGA器件研制的专用高速信号处理机。它们均采用FX型结构,具备数据实时接收、解码、相关处理、相位校正信号提取、实时监视等功能。当探测器预报时延模型精度不够时,处理机系统加入了可通过特殊的条纹搜索功能,现场实时自主重构高精度时延模型,引导处理机完成探测器信号相关处理。经过工程验证,月球探测器VLBI测定轨的实时数据速率达到了512 Mbps。

注释:
1)  ● The software correlator and hardware one are used to construct the main and standby related correlators to improve the system reliability. ● The correlator system is capable of real-time processing of the radio source and probe signals,and the total delay of the correlator is less than 25 seconds. ● When the prediction delay model error of the probe correlator is not very accurate,the special real-time fringe search module can be used to reconstruct the high-precision delay model to guide the correlation processing.

English Abstract

郑为民, 张娟, 徐志骏, 刘磊, 童力, 张秀忠. 实时VLBI处理机技术[J]. 深空探测学报(中英文).
引用本文: 郑为民, 张娟, 徐志骏, 刘磊, 童力, 张秀忠. 实时VLBI处理机技术[J]. 深空探测学报(中英文).
ZHENG Weimin, ZHANG Juan, XU Zhijun, LIU Lei, TONG Li, ZHANG Xiuzhong. Real-Time VLBI Technologies in Chinese Lunar Exploration[J]. Journal of Deep Space Exploration.
Citation: ZHENG Weimin, ZHANG Juan, XU Zhijun, LIU Lei, TONG Li, ZHANG Xiuzhong. Real-Time VLBI Technologies in Chinese Lunar Exploration[J]. Journal of Deep Space Exploration.
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