CAWSES-II Space Weather International Collaborative Research Database in Japan (2009-2013)

This database provides ionospheric absorption data obtained by the imaging riometer (IRIS) observation at Ny Alesund, Svalbard since 1991. By coordinated analysis of this database with the same IRIS data obtained at Greenland and Iceland, the study of dynamics of auroral particle precipitations in the Arctic region is performed, and also by combining the data obtained at Chinese Zhongshan Station, Japanese Syowa Station in Antarctica the study of inter-hemispherical conjugacy and non-conjugacy of auroral particle precipitations is performed. The database is also available for studying polar-cap absorption caused by precipitation of very high energetic protons.

Original IRIS data consist of two-dimensional cosmic noise intensities with 8x8 channels sampled every 4 seconds. 64-channels quiet-day curves (QDCs) are reduced from original one-month IRIS data, and thus real ionospheric absorption data are obtained by subtraction between original data and QDCs. 24-hour absorption data composed from 8-channels on the north-south and east-west beams centered at N4E7 beam are plotted as a quick look, and the absorption data in the period from September 1991 to September 2003 are opened by a CD as a database.

CD database ;
SPACE-W Database in Japan
Observation (SPACEWDB-J-OB0040)
 Data of the Imaging Riometer for Ionospheric Studies (IRIS)
 1991/9-2003/9
 Version 1.0  March 2004
Solar-Terrestrial Environment Laboratory, Nagoya University