School of Atmospheric Sciences Sun Yat-sen University Zhuhai Guangdong 519082 China;
School of Atmospheric Sciences Sun Yat-sen University Zhuhai Guangdong 519082 ChinaNational Astronomical Observatories of China Chinese Academy of Sciences Beijing 100101 ChinaChinese Academy of Sciences Center for Excellence in Comparative Planetology Hefei 230026 China;
National Astronomical Observatories of China Chinese Academy of Sciences Beijing 100101 ChinaChinese Academy of Sciences Center for Excellence in Comparative Planetology Hefei 230026 China;
School of Atmospheric Sciences Sun Yat-sen University Zhuhai Guangdong 519082 China;
School of Atmospheric Sciences Sun Yat-sen University Zhuhai Guangdong 519082 China;
Mars; planetary ionospheres; radio occultation;