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Ionospheric inversion of the Venus Express radio occultation data observed by Shanghai 25 m and New Norcia 35 m antennas
Zhang, Su-Jun1,2,3; Jian, Nian-Chuan1; Li, Jin-Ling1; Ping, Jin-Song4; Chen, Cong-Yan5; Zhang, Ke-Fei6
2015-09-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume15Issue:9Pages:1559-1570
AbstractElectron density profiles of Venus' ionosphere are inverted from the Venus Express (VEX) one-way open-loop radio occultation experiments carried out by the Shanghai 25 m antenna from November 2011 to January 2012 at solar maximum conditions and by the New Norcia 35 m antenna from August 2006 to June 2008 at solar intermediate conditions. The electron density profile (from 110 km to 400 km), retrieved from the X-band egress observation at the Shanghai station, shows a single peak near 147 km with a peak density of about 2 x 1 0(4) c m(-3) at a solar zenith angle of 94 degrees. As a comparison, the VEX radio science (VeRa) observations at the New Norcia station were also examined, including S- and X-band and dual-frequency data in the ingress mode. The results show that the electron density profiles retrieved from the S-band data are more analogous to the dual-frequency data in terms of the profile shape, compared with the X-band data. Generally, the S-band results slightly underestimate the magnitude of the peak density, while the X-band results overestimate it. The discrepancy in the X-band profile is probably due to the relatively larger unmodeled orbital errors. It is also expected that the ionopause height is sensitive to the solar wind dynamical pressure in high and intermediate solar activities, usually in the range of 200-1000 km on the dayside and much higher on the nightside. Structural variations ("bulges" and fluctuations) can be found in the electron density profiles during intermediate solar activity, which may be caused by the interaction of the solar wind with the ionosphere. Considerable ionizations can be observed in Venus' nightside ionosphere, which are unexpected for the Martian nightside ionosphere in most cases.
KeywordPlanets And Satellites: Terrestrial Planets Planets And Satellites: Atmospheres Planets And Satellites: Detection
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1674-4527/15/9/012
WOS KeywordSOLAR-WIND INTERACTION ; DAYSIDE IONOSPHERE ; NIGHTSIDE IONOSPHERE ; 2-DIMENSIONAL MODEL ; MAGNETIC-FIELDS ; ATMOSPHERE ; TERMINATOR ; IONOPAUSE ; PLASMA ; HOLES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000360555100012
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16022
Collection毫米波和亚毫米波技术实验室
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Planetary Sci, Shanghai 200030, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing 100012, Peoples R China
5.Southeast Univ, Sch Informat Sci & Engn, Nanjing 210096, Jiangsu, Peoples R China
6.RMIT Univ, Melbourne, Vic 3001, Australia
Recommended Citation
GB/T 7714
Zhang, Su-Jun,Jian, Nian-Chuan,Li, Jin-Ling,et al. Ionospheric inversion of the Venus Express radio occultation data observed by Shanghai 25 m and New Norcia 35 m antennas[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(9):1559-1570.
APA Zhang, Su-Jun,Jian, Nian-Chuan,Li, Jin-Ling,Ping, Jin-Song,Chen, Cong-Yan,&Zhang, Ke-Fei.(2015).Ionospheric inversion of the Venus Express radio occultation data observed by Shanghai 25 m and New Norcia 35 m antennas.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(9),1559-1570.
MLA Zhang, Su-Jun,et al."Ionospheric inversion of the Venus Express radio occultation data observed by Shanghai 25 m and New Norcia 35 m antennas".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.9(2015):1559-1570.
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