# Design of Multifunctional Mesosphere-Ionosphere Sounding System and Preliminary Results  
[PERSON]  
1 School of Electronic Information, Wuhan University, Wuhan 430072, China; [PERSON]ADDRESS]du.cn (T.L. ); [EMAIL_ADDRESS] (Z.Z. ); [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (C.Z. ); [EMAIL_ADDRESS] (C.J. ); [EMAIL_ADDRESS] (B.N. ); [EMAIL_ADDRESS] (Y.H.) [PERSON]  
1 School of Electronic Information, Wuhan University, Wuhan 430072, China; [PERSON]ESS] (T.L. ); [EMAIL_ADDRESS] (Z.Z. ); [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (C.Z. ); [EMAIL_ADDRESS] (C.J. ); [EMAIL_ADDRESS] (B.N. ); [EMAIL_ADDRESS] (Y.H.) [PERSON]  
1 School of Electronic Information, Wuhan University, Wuhan 430072, China; [PERSON]ESS] (T.L. ); [EMAIL_ADDRESS] (Z.Z. ); [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (C.Z. ); [EMAIL_ADDRESS] (C.J. ); [EMAIL_ADDRESS] (B.N. ); [EMAIL_ADDRESS] (Y.H.) [PERSON]  
1 School of Electronic Information, Wuhan University, Wuhan 430072, China; [PERSON]ADDRESS] (T.L. ); [EMAIL_ADDRESS] (Z.Z. ); [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (C.Z. ); [EMAIL_ADDRESS] (C.J. ); [EMAIL_ADDRESS] (B.N. ); [EMAIL_ADDRESS] (Y.H.) [PERSON]  
1 School of Electronic Information, Wuhan University, Wuhan 430072, China; [PERSON]ESS] (T.L. ); [EMAIL_ADDRESS] (Z.Z. ); [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (C.Z. ); [EMAIL_ADDRESS] (C.J. ); [EMAIL_ADDRESS] (B.N. ); [EMAIL_ADDRESS] (Y.H.) [PERSON]  
1 School of Electronic Information, Wuhan University, Wuhan 430072, China; [PERSON]ESS] (T.L. ); [EMAIL_ADDRESS] (Z.Z. ); [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (C.Z. ); [EMAIL_ADDRESS] (C.J. ); bbni@whu. mechanism between them by conducting these overlapped regions sounding compatibly [1]. However, current experiments are usually carried out separately with the equipment of different types. For the sounding of the mesosphere, space-based sounding depended on the satellites, land-based ones like mesosphere-stratosphere-troposphere (MST) radar and medium frequency (MF) radar are the most commonly used devices. Among them, MF radar is the most widely used one, which can detect the atmospheric wind field and electronic density in the range of 60-100 km of the adjacent space, especially the mesosphere. The research on MF radar can be traced back to the work of [PERSON] and [PERSON] [2]. In 1950s, the differential absorption experimental (DAE) algorithm was employed by them on MF radars to calculate the electron density of lower ionosphere [3]. Based on the spaced antenna (SA) technology and the full correlation analysis (FCA) algorithms proposed by [PERSON] and [PERSON] [4; 5], MF radars were also beginning to be used for the estimation of the regional wind field of the mesosphere [6; 7; 8; 9; 10; 11]. Compared to the space-based methods and MST radars, the structure of MF radar is relatively simple and easier to implement with comparatively less cost. Up to now, numerous MF radars have been built and put into routine operation around the world. The performance is also improving with the progress of the hardware and software technology. In 1975, [PERSON] and [PERSON] leaded to develop the advanced MF radar receivers and data processing methods for atmospheric dynamics studies in the mesosphere and lower thermosphere (MLT) region [12; 13]. In 1994, the Yamagawa Radar was built in Japan and, based on the sounding data, [PERSON] and [PERSON] et al. reported their coordinated observations of the dynamics and coupling processes of the mesosphere and lower thermosphere winds at the middle-high latitude in 1995 [14]. In 1995 the team led by [PERSON] and [PERSON] built in Australia the world's largest MF radar at Buckland Park, whose total transmitting power reaches 135 kW [15]. Saura radar, located in Northern Norway, is also very powerful and flexible. Relying on the large antenna array and larger transmitting power, Saura radar can be used for wind estimation, deriving electron density and the measurements of gravity wave momentum fluxes [16; 17].