Kitami Institute of Technology;
Kitami 090-8507;
Japan;
Application Laboratory;
Japan Agency for Marine-Earth Science and Technology;
Yokohama 236-0001;
Japan;
National Institute of Polar Research;
Tachikawa 190-8518;
Japan;
SOKENDAI(Graduate University for Advanced Studies);
Hayama 240-0193;
Japan;
University of Toyama;
Toyama 930-8555;
Japan;
radiosonde; data; assimilation; TIGGE; Antarctica; weather; forecast;