@article{oai:nipr.repo.nii.ac.jp:00003557,
 author = {Nomura, Akio and Iwasaka, Yasunobu and Kano, Tetsuo},
 journal = {Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology},
 month = {Aug},
 note = {P(論文), We observed gravity wave activities in the vertical profiles of the sodium layer in the upper mesosphere on 42 nights during the period from March to October, 1985. The data were obtained by lidar measurements at Syowa Station, Antarctica (69°00'S, 39°35'E). The wave parameters, such as vertical wavelenght, vertical phase velocity, and period, were estimated from the vertical profiles of sodium density by means of a fast Fourier transform (FFT) technique. The seasonal and the nocturnal variations of gravity wave activities are reported and compared with the data obtained at other locations.},
 pages = {1--7},
 title = {Gravity wave activities over Syowa Station, Antarctica},
 volume = {2},
 year = {1989}
}