@misc{oai:nipr.repo.nii.ac.jp:00015199,
 author = {Kawahara, Takuya and Nozawa, Satonori and Saito, Norihito and Tsuda, Takuo and Kawabata, Tetsuya and Takahashi, Toru and Wada, Satoshi},
 month = {Dec},
 note = {The Ninth Symposium on Polar Science/Ordinary sessions: [OS] Space and upper-atmosphere sciences, Wed. 5 Dec. / Entrance Hall (1st floor), National Institute of Polar Research},
 title = {System upgrade of the Na Lidar at Tromso for the thermospheric Na observation},
 year = {2018}
}