Using Tianwen-1 Differential One-way Range Signals to Probe Corotating Interaction Regions: Case Studies

He, Qingbao1; Wang, Zhichao2,3; Liu, Qinghui2; Liu, Kaijun1; Guo, Li2

2023-09-01

10.3847/1538-4357/acf30e

ASTROPHYSICAL JOURNAL   Impact Factor & Quartile

0004-637X

1538-4357

The study reports the first detection of corotating interaction regions (CIRs) in the solar wind by the differential one-way range (DOR) signals transmitted by Tianwen-1. Differential phase delay is calculated for the DOR signals. Variations of the total electron content (TEC) along the signal path between Tianwen-1 and the ground stations are then derived from changes in the differential phase delay. Large TEC variations are found for 2021 February 11, 18, and 19 even after the influence from the Earth's ionosphere has been removed. In situ solar wind measurements and the corresponding simulation results further show that the TEC variations are caused by the CIRs that passed through the signal path on these days. The study demonstrates that CIR structures can be probed using deep-space spacecraft range signals. Such measurements can be used to constrain global solar wind forecast models.

SCI

English

First ; Corresponding

We are grateful to people in Shanghai VLBI center who have participated in Tianwen-1 mission for providing the DOR signal data. We would also like to thank Dr. Fei Yao, Dr. Shuai Zhang, Dr. Ying Xiong, Dr. Yan Wang, Xianming Zheng, Yuqi Liu, and Jingyi Zho[XDB 41000000] ; Strategic Priority Research Program of Chinese Academy of Sciences["41974168","42174203"] ; NSFC[2019QN01G838] ; Guangdong Pearl River Talent Program[JCYJ20210324104810027]

Astronomy & Astrophysics

Astronomy & Astrophysics

WOS:001070271300001

IOP Publishing Ltd

SPACE SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

He, Qingbao,Wang, Zhichao,Liu, Qinghui,et al. Using Tianwen-1 Differential One-way Range Signals to Probe Corotating Interaction Regions: Case Studies[J]. ASTROPHYSICAL JOURNAL,2023,955(1).

He, Qingbao,Wang, Zhichao,Liu, Qinghui,Liu, Kaijun,&Guo, Li.(2023).Using Tianwen-1 Differential One-way Range Signals to Probe Corotating Interaction Regions: Case Studies.ASTROPHYSICAL JOURNAL,955(1).

He, Qingbao,et al."Using Tianwen-1 Differential One-way Range Signals to Probe Corotating Interaction Regions: Case Studies".ASTROPHYSICAL JOURNAL 955.1(2023).