Analysis of Changing Swarm Rate using Volumetric Strain

Takao Kumazawa1, Yosihiko Ogata2, Kazuhiro Kimura3, Kenji Maeda3 and Akio Kobayashi4, (1)ISM Institute of Statistical Mathematics, Tokyo, Japan, (2)Institute of Statistical Mathematics, Tokyo, Japan, (3)Meteorological Research Institute, Tsukuba, Ibaraki, Japan, (4)Meteorological Research Institute of Japan, Tsukuba, Ibaraki, Japan