NAOC Open IR
VLBI Data Processing on Coronal Radio-sounding Experiments of Mars Express
Ma, Maoli1,2; Calves, Guifre Molera3; Cimo, Giuseppe4; Zhang, Peijin5; Xiong, Ming6; Li, Peijia1; Kummamuru, Pradyumna3; Chu, Zhanghu1; Jiang, Tianyu1; Xia, Bo1; Tetsuro, Kondo1; Tong, Fengxian1; de Vicente, Pablo7; Quick, Jonathan8; Zhang, Hua9; Chen, Zhong1,10
2021-10-01
Source PublicationASTRONOMICAL JOURNAL
ISSN0004-6256
Volume162Issue:4Pages:13
AbstractThe ESA's Mars Express solar corona experiments were performed at two solar conjunctions in the years 2015 and 2017 by a number of radio telescopes in the European VLBI Network. This paper presents the methods to measure the frequency and phase fluctuations of the spacecraft radio signal, and the applications to study the characteristics of the plasma turbulence effects on the signal at a single station and at multiple stations via cross correlation. The power spectra of the frequency fluctuations observed between 4.9 and 76.3 R (s) have a power-law shape close to a Kolmogorov spectrum over the frequency interval nu (lo) < nu < nu (up), where the nominal value of nu (lo) is set to 3 mHz and nu (up) is in the range of 0.03-0.15 Hz. The rms of the frequency fluctuations is presented as a function of the heliocentric distance. Furthermore, we analyze the variations of the electron column density fluctuations at solar offsets 4.9 R (s) and 9.9 R (s) and the cross-correlation products between the VLBI stations. The power density of the differential fluctuations between different stations decreases at nu < 0.01 Hz. Finally, the fast flow speeds of solar wind >700 km s(-1) are derived from the cross correlation of frequency fluctuations at nu < 0.01 Hz. The fast flow speeds of solar wind correspond to the high heliolatitude of the coronal region that the radio rays passed. The VLBI observations and analysis methods can be used to study the electron column density fluctuations and the turbulence at multiple spatial points in the inner solar wind by providing multiple lines of sight between the Earth and the spacecraft.
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration
DOI10.3847/1538-3881/ac0dc1
WOS KeywordSOLAR-WIND TURBULENCE ; FREQUENCY FLUCTUATIONS ; PHASE SCINTILLATION ; MASS EJECTION ; VELOCITY ; DENSITY ; ULYSSES ; PLASMA ; ACCELERATION ; CONJUNCTIONS
Language英语
Funding ProjectNational Natural Science Foundation of China[11703070] ; National Natural Science Foundation of China[U1831137] ; National Natural Science Foundation of China[U1931135] ; National Natural Science Foundation of China[11903067] ; National Natural Science Foundation of China[11803070] ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform"[DKA 2017-12-02-09] ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration[D020303]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; National R&D Infrastructure and Facility Development Program of China, "Fundamental Science Data Sharing Platform" ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration ; Pre-research Project on Civil Aerospace Technologies - China National Space Administration
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000695704100001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75631
Collection中国科学院国家天文台
Corresponding AuthorMa, Maoli
Affiliation1.Shanghai Astron Observ, 80 Nandan Rd, Shanghai, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210033, Jiangsu, Peoples R China
3.Univ Tasmania, Private Bag 37, Hobart, Tas 7001, Australia
4.Joint Inst VLBI ERIC, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands
5.Univ Sci & Technol China, 96 Jinzhai Rd, Hefei, Peoples R China
6.Natl Space Sci Ctr, 1 Nanertiao, Beijing, Peoples R China
7.Ctr Desarrollos Tecnol, Observatorio Yebes, Guadalajara, Spain
8.Hartebeesthoek Radio Astron Observ, POB 443, Krugersdorp, South Africa
9.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi, Peoples R China
10.Natl Basic Sci Data Ctr, Bldg 2,4 Zhongguancun South 4th St, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ma, Maoli,Calves, Guifre Molera,Cimo, Giuseppe,et al. VLBI Data Processing on Coronal Radio-sounding Experiments of Mars Express[J]. ASTRONOMICAL JOURNAL,2021,162(4):13.
APA Ma, Maoli.,Calves, Guifre Molera.,Cimo, Giuseppe.,Zhang, Peijin.,Xiong, Ming.,...&Chen, Zhong.(2021).VLBI Data Processing on Coronal Radio-sounding Experiments of Mars Express.ASTRONOMICAL JOURNAL,162(4),13.
MLA Ma, Maoli,et al."VLBI Data Processing on Coronal Radio-sounding Experiments of Mars Express".ASTRONOMICAL JOURNAL 162.4(2021):13.
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