%0 Journal Article %T Characteristics of double sodium layer over Haikou, China (20.0° N, 110.1° E) %A Dali, Y.. %A Tiemin, Z.. %A Jihong, W.. %A Jianqing, W.. %A Linmao, W.. %A Xu, Z.. %A Hongyan, P.. %K lidar, ionospheric layer, double sodium layer %J Solar-Terrestrial Physics %D 2019 %N 5 %P 4 %I INFRA-M Academic Publishing LLC.