VLBI观测双线极化条纹拟合方法

doi:10.11947/j.AGCS.2020.20190083

测绘学报 ›› 2020, Vol. 49 ›› Issue (4): 423-431.doi: 10.11947/j.AGCS.2020.20190083

VLBI观测双线极化条纹拟合方法

黄逸丹¹, 刘磊^1,2,3, 舒逢春^1,2,3, 郑为民^1,2,3

1. 中国科学院上海天文台, 上海 200030;
2. 中国科学院射电天文重点实验室, 江苏南京 210008;
3. 上海市导航定位重点实验室, 上海 200030

收稿日期:2019-03-13 修回日期:2019-11-30 发布日期:2020-04-17
通讯作者: 郑为民 E-mail:zhwm@shao.ac.cn
作者简介:黄逸丹(1983-),女,硕士,高级工程师,研究方向为VLBI测地数据处理。E-mail:hyd@shao.ac.cn
基金资助:
国家自然科学基金（11573056；11573057；11903067；11973011）；国家科技基础条件平台项目“国家基础科学数据共享服务平台”（DKA2017-12-02-09）；上海市空间导航与定位技术重点实验室课题（ZZXT-201902）

A dual linear polarization fringe fitting method for VLBI observation

HUANG Yidan¹, LIU Lei^1,2,3, SHU Fengchun^1,2,3, ZHENG Weimin^1,2,3

1. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;
2. Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, China;
3. Shanghai Key Laboratory of Space Navigation and Positioning Techniques, Shanghai 200030, China

Received:2019-03-13 Revised:2019-11-30 Published:2020-04-17
Supported by:
The National Natural Science Foundation of China (Nos. 11573056;11573057;11903067;11973011);The National Fundamental Science Data Sharing Platform (No. DKA2017-12-02-09);Shanghai Key Laboratory of Space Navigation and Positioning Techniques (No. ZZXT-201902)

摘要/Abstract

摘要： 提出了一种可用于下一代VLBI观测系统（VGOS）的双线极化条纹拟合方法。现有的VLBI观测模式采用的是右圆极化（RCP），而VGOS系统采用的是双线极化。本文方法包括校正和组合条纹拟合两部分。校正部分选择一颗强源作为参考源，分别得到不同极化方式下的通道时延及相位校正数据，用于目标源的校正。组合条纹拟合部分将4种极化分量的可见度数据组合成伪Stokes分量，通过搜索差分星位角使伪Stokes分量的幅值达到最大，从而获得最终的时延观测量。与单极化条纹拟合相比，组合极化获得的条纹具有更高的信噪比（SNR）及更小的条纹相位弥散度。

关键词: VGOS, 双线极化, 条纹拟合, 信噪比, 时延观测量, 相位弥散

Abstract: In this paper, we propose a dual linear polarization fringe fitting method which can be used in the next generation VLBI system (VLBI global observing system, VGOS). The legacy geodetic VLBI observation mode is dedicated to the right circular polarization (RCP), which differs from the dual linear polarization adopted in the VGOS system. The algorithm presented in this work consists of the calibration part and combined fringe fitting part. In the calibration part, we derive the intermediate frequency (IF) delay and phase calibration information from each polarization product by carrying out fringe fitting on a strong reference source. Then this information is applied to the target sources. In the combined fringe fitting part, we combine 4 polarization products into the Pseudo-Stokes Intensity and in the meanwhile search for the appropriate differential parallactic angle, so as to maximize the amplitude of the intensity and therefore derive the delay as observable. Compared with single polarization, the combined product yields higher signal-to-noise ratio (SNR) and smaller fringe phase scatter.

Key words: VLBI global observing system, dual linear polarization, fringe fitting, signal-to-noise ratio, delay observation, phase scatter

中图分类号:

P228
P164

黄逸丹, 刘磊, 舒逢春, 郑为民. VLBI观测双线极化条纹拟合方法[J]. 测绘学报, 2020, 49(4): 423-431.

HUANG Yidan, LIU Lei, SHU Fengchun, ZHENG Weimin. A dual linear polarization fringe fitting method for VLBI observation[J]. Acta Geodaetica et Cartographica Sinica, 2020, 49(4): 423-431.

参考文献

[1] THOMPSON AR, MORAN J M, SWENSON G W JR. Interferometry and synthesis in radio astronomy[M]. New York:Wiley-Interscience Publication, 2001.
[2] MA C, ARIAS E F, EUBANKS T M, et al. The international celestial reference frame as realized by very long baseline interferometry[J]. The Astronomical Journal, 1998, 116(1):516.
[3] MA C, ARIAS E F, BIANCO G, et al. The second realization of the international celestial reference frame by very long baseline interferometry[J]. The Astronomical Jaurnal, 2015, 150(2):58-66.
[4] 李金岭, 王广利. 上海VLBI站相对于欧亚板块稳定区域的运动[J]. 中国科学院上海天文台年刊, 2001(22):57-62. LI Jinling, WANG Guangli. The relative motion of Shanghai VLBI station to the stable part of eurasia plate[J]. Annals of Shanghai Observatory Academia Sinica, 2001(22):57-62.
[5] FEIGL K L, AGNEW D C, BOCK Y, et al. Space geodetic measurement of crustal deformation in Central and Southern California, 1984-1992[J]. Journal of Geophysical Research, 1993, 98(B12):21677-21712.
[6] FISH V L, JOHNSON M D, DOELEMAN S S, et al. Persistent asymmetric structure of sagittarius A* on event horizon scales[J]. The Astrophysical Journal, 2016, 820(2):90.
[7] WALTER F, BRINKS E, DEBLOK W J G, et al. THINGS:The H I nearby galaxy survey[J]. The Astrophysical Journal, 2008, 136(6):2563-2647.
[8] 乔叔波, 李金岭, 柴洪洲, 等. 天球参考架的稳定源选取及其最新实现[J]. 测绘学报, 2010, 39(2):120-128. QIAO Shubo, LI Jingling, CHAI Hongzhou, et al. Newly realization of celestial reference frame by stable sources selection[J]. Acta Geodaetica et Cartographica Sinica, 2010, 39(2):120-128.
[9] 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 Lei, ZHENG Weimin, ZHANG Juan, et al. Precision analysis of Chinese VLBI network software correlator for geodetic applications[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(7):805-814. DOI:10.11947/j.AGCS.2017.20160600.
[10] SHU Fengchun, PETROV L, JIANG Wu, et al. VLBI ecliptic plane survey:VEPS-1[J]. The Astrophysical Journal Supplement Series, 2017, 230(2):13.
[11] SHU Fengchun, ZHENG Weimin, JIANG W, et al. Shanghai VLBI correlator[C]//Proceedings of the International VLBI Service for Geodesy and Astrometry 2012 Annual Report. 2013:208-211.
[12] 陈世杰, 杜兰, 旦增曲英, 等. 航天器姿轨控始末时刻的动力学标定方法[J]. 测绘学报, 2013, 42(6):824-830. CHEN Shijie, DU Lan, DANZENG Quying, et al. Dynamic detection algorithm for spacecraft attitudinal control and orbital control epoch[J]. Acta Geodaetica et Cartographica Sinica, 2013, 42(6):824-830.
[13] 钱志瀚, 李金岭. 甚长基线干涉测量技术在深空探测中的应用[M]. 北京:中国科学技术出版社, 2012. QIAN Zhihan, LI Jinling. The application of very long baseline interferometry in deep space navigation[M]. Beijing:Science and Technology of China Press, 2012.
[14] 乔叔波, 李金岭, 孙付平. VLBI在探月卫星定位中的应用分析[J]. 测绘学报, 2007, 36(3):262-268. DOI:10.3321/j.issn:1001-1595.2007.03.004. QIAO Shubo, LI Jingling, SUN Fuping. Application analysis of lunar exploration satellite positioning by VLBI technique[J]. Acta Geodaetica et Cartographica Sinica, 2007, 36(3):262-268. DOI:10.3321/j.issn:1001-1595.2007.03.004.
[15] 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. TONG Fengxian, ZHENG Weiming, SHU Fengchun. Accurate relative positioning of Yutu lunar rover using VLBI phase-referencing mapping technology[J]. Chinese Science Bulletin, 2014, 59(34):3362-3369.
[16] BEHREND D. Data handling within the international VLBI service[J]. Data Science Journal, 2013, 12(2):81-84.
[17] SCHUH H, BEHREND D. VLBI:a fascinating technique for geodesy and astrometry[J]. Journal of Geodynamics, 2012, 61(10):68-80.
[18] PETRACHENKO W, BEHREND D, HASE H, et al. The VLBI 2010 global observing system(VGOS)[C]//Proceedings of the General Assembly European Geosciences Union. Vienna, Austria:EGU, 2013.
[19] NIELL A, BARRETT J, BURNS A, et al. Demonstration of a broadband very long baseline interferometer system:a new instrument for high-precision space geodesy[J]. Radio Science, 2018, 53(10):1269-1291.
[20] NIELL A E, BEAUDOIN C J, CAPPALLO R J, et al. The NASA-Haystack VGOS development systems[C]//Proceedings of the American Geophysical UnionFall Meeting 2014.[S.l.]:AGU, 2014.
[21] NIELL A, CAPPALLO R, COREY B, et al. VGOS observations with westford, GGAO, and the new station at Kokee, Hawaii[C]//Proceedings of the International VLBI Service for Geodesy and Astrometry 2016 General Meeting Proceedings. Cap Town:New Horizons, 2016:44-48.
[22] KRONSCHNABL G, NEIDHARDT A, PLÖTZ C, et al. The VGOS twin radio telescope TTW2 at Wettzell[C]//International VLBI Service for Geodesy and Astrometry 2016 General Meeting Proceedings.Cap Town:New Horizons, 2016:49-52.
[23] KONDO T, TAKEFUJI K. An algorithm of wideband bandwidth synthesis for geodetic VLBI[J]. Radio Science, 2016, 51(10):1686-1702.
[24] FUKUZAKI Y, TANABE T, KURODA J, et al. Construction of a VGOS Station in Japan[C]//Proceedings of the International VLBI Service for Geodesy and Astrometry 2014 General Meeting Proceedings.[S. l.]:The New VLBI Network, 2014:32-35.
[25] MELNIKOV A, VICENTE P, KURDUBOV S, el al. First 2-GBPS observations between the KVAZAR VGOS antennas and the yebes RAEGE antenna[C]//Proceedings of the International VLBI Service for Geodesy and Astrometry 2016 General Meeting Proceedings.Cap Town:New Horizons, 2016:40-43.
[26] 孙中苗, 范昊鹏. VLBI全球观测系统(VGOS)研究进展[J]. 测绘学报, 2017, 46(10):1346-1353. DOI:10.11947/j.AGCS.2017.20170326. SUN Zhongmiao, FAN Haopeng. Research progress of VLBI global observing system (VGOS)[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(10):1346-1353. DOI:10.11947/j.AGCS.2017.20170326.
[27] 李金岭, 温波, 孙中苗, 等. 佘山25 m与13 m射电望远镜互掩问题分析[J]. 测绘学报, 2018, 47(1):1-7. DOI:10.11947/j.AGCS.2018.20160670. LI Jinling, WEN Bo, SUN Zhongmiao, et al. Analysis of mutual shielding effect between the 25 m and 13 m radio telescope at Sheshan[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(1):1-7. DOI:10.11947/j.AGCS.2018.20160670.
[28] CAPPALLO R. Correlating and fringe-fitting broadband VGOS data[C]//Proceedings of the International VLBI Service for Geodesy and Astrometry 2014 General Meeting Proceedings.[S. l.]:The New VLBI Network. 2014:91-96.
[29] CAPPALLOR. Delay and phase calibration in VGOS post-processing[C]//Proceedings of the International VLBI Service for Geodesy and Astrometry 2016 General Meeting Proceedings. Cape Twon:New Horizons,2016:61-64.
[30] 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 Pacitic, 2011, 123(901):275-287.

VLBI观测双线极化条纹拟合方法

A dual linear polarization fringe fitting method for VLBI observation

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 14

编辑推荐

Metrics

本文评价

[1]	王洁, 王娜子, 徐天河, 高凡, 贺匀峤. 组合GNSS观测值反演海面高度[J]. 测绘学报, 2022, 51(2): 201-211.
[2]	王笑蕾, 何秀凤, 陈殊, 张勤, 宋敏峰. 地基GNSS-IR风速反演原理及方法初探[J]. 测绘学报, 2021, 50(10): 1298-1307.
[3]	梁月吉, 任超, 黄仪邦, 潘亚龙, 张志刚. 利用GPS-IR监测土壤湿度的多星线性回归反演模型[J]. 测绘学报, 2020, 49(7): 833-842.
[4]	郭飞霄, 孙中苗, 任飞龙, 汪菲菲. GRACE时变重力场各向异性高斯组合滤波方法[J]. 测绘学报, 2019, 48(7): 898-907.
[5]	王泽民, 刘智康, 安家春, 林国标. 基于GPS和北斗信噪比观测值的雪深反演及其误差分析[J]. 测绘学报, 2018, 47(1): 8-16.
[6]	刘磊, 郑为民, 张娟, 舒逢春, 童锋贤, 童力. 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.
[7]	孙中苗, 范昊鹏. VLBI全球观测系统(VGOS)研究进展[J]. 测绘学报, 2017, 46(10): 1346-1353.
[8]	张双成, 南阳, 李振宇, 张勤, 戴凯阳, 赵迎辉. GNSS-MR技术用于潮位变化监测分析[J]. 测绘学报, 2016, 45(9): 1042-1049.
[9]	汉牟田, 张波, 杨东凯, 洪学宝, 杨磊, 宋曙辉. 利用GNSS干涉信号振荡幅度反演土壤湿度[J]. 测绘学报, 2016, 45(11): 1293-1300.
[10]	傅鹏孙权森纪则轩陈强. 一种遥感图像信噪比评估和度量准则[J]. , 2013, 42(4): 0-0.
[11]	张毅闫利. 地面激光点云强度噪声的三维扩散滤波方法研究[J]. , 2013, 42(4): 0-0.
[12]	王尧,崔晓伟,陆明泉. 模数转换器对导航信号的影响分析及最优量化参数选择方法设计[J]. 测绘学报, 2011, 40(Sup.): 100-104.
[13]	顾勇为,归庆明. 航空重力测量数据向下延拓基于信噪比的正则化方法的研究[J]. 测绘学报, 2010, 39(5): 458-464.
[14]	孙倩,朱建军,,李志伟,尹宏杰,胡波,蒋弥. 基于信噪比的InSAR干涉图自适应滤波[J]. 测绘学报, 2009, 38(5): 0-414.