China University of Petroleum (Huadong);
Qingdao 266580;
China;
First Institute of Oceanography;
State Oceanic Administration;
Qingdao 266061;
China;
College of Physics;
Qingdao University;
Qingdao 266071;
China;
Qingdao Branch;
China Research Institute of Radiowave Propagation;
Qingdao 266107;
China;