Improved Limb Atmospheric Spectrometer (ILAS) and ILAS-II

The websites of ILAS and ILAS-II were closed in July 2018.
For previous monitoring activities, please refer to the following web archives (as of April 5, 2018) on WARP, National Diet Library, Japan.

No update has been made since March 2006, when the ILAS/ILAS-II project was ended, except for the list of publications (see below). Data distribution for general users is still ongoing, but no update for retrieval algorithms will be made (Version 8 for ILAS and Version 3 for ILAS-II are the latest ones). DOIs for each data set are listed below.

List of publications

Two unpublished papers that are cited by some publications are available here:

Sugita, T., T. Yokota, H. Nakajima, S. Oshchepkov, Y. Sasano, H. Irie, N. Saitoh, M. K. Ejiri, H. Kanzawa, Y. Itou, H. Saeki, H. Matsuda, and M. Kaji (2005), Assessment of Improved Limb Atmospheric Spectrometer (ILAS) Version 6 data quality: measurements of stratospheric O3, HNO3, NO2, N2O, CH4, H2O, and aerosol extinction coefficient, ILAS project report No. 1.

Yokota, T., H. Nakajima, T. Sugita, H. Kawasaki, M. Horikawa, H. Matsuda, N. Uemura, H. Kanzawa, H. Kobayashi, and Y. Sasano (2006), Improved Limb Atmospheric Spectrometer-II (ILAS-II) Version 1.4 algorithm for retrieval of gas and aerosol profiles in the stratosphere (unpublished manuscript, 2006).