@article{oai:nipr.repo.nii.ac.jp:00003796,
 author = {Kanzawa, Hiroshi and Fujii, Ryoichi and Yamazaki, Koji and Yamanaka, Manabu D.},
 journal = {Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology},
 month = {Sep},
 note = {P(論文), The Polar Patrol Balloon (PPB) project is to execute a long duration circumpolar balloon experiment in the Antarctic using a zero-pressure balloon with an auto-ballast control to keep it at an almost constant pressure level in the stratosphere. The PPB project has been developed under cooperation between the Institute of Space and Astronautical Science and the National Institute of Polar Research. An actual trajectory of a PPB launched from Syowa Station (69},
 title = {Observational experiment of the Antarctic ozone hole of 1991 under the Polar Patrol Balloon (PPB) Project: (1) A preliminary result of trajectory analysis (abstract)},
 volume = {7},
 year = {1993}
}