Atmospheric Environment Observations
Stratospheric ozone and the species related to the ozone depletion as well as green house gases (GHGs) such as carbon dioxide and methane are measured by using a high-resolution Fourier Transform Infrared spectrometer (FTIR) for better understandings of their temporal variations and mechanism of the ozone depletion and global warming. In addition, measurements of stratospheric NO2 and ozone column densities are also made with a UV/Visible spectrometer. These observations have been carried out as a part of the Network for the Detection of Atmospheric Composition Change (NDACC), and the GHG's data are provided to a global network of CO2 observation (Total Carbon Column Observing Network: TCCON) and the GOSAT satellite validation program as a validation data.
Time-height section of the variations of stratospheric ozone measured with the Moshiri and Rikubetsu FTIRs
Fourier Transform Infrared spectrometer(FTIR)
Time series of XCO2 measured with the Moshiri FTIR analyzed by STEL and the National Institute for Environmental Studies (NIES).
Ionospheric and Magnetospheric Environment Observations
Low-latitude auroras associated with great magnetic storms have been successfully observed by optical instruments (high-sensitivity all-sky camera and scanning/fixed-type photometers). Geomagnetic variations are measured by using fluxgate and induction magnetometers. ELF/VLF radio wave emissions generated by lightening and in the Earth's magnetosphere are also recorded routinely using a 43m loop-antenna. These data are opened to the scientific community for better understanding of the ionospheric and magnetospheric environment and for monitoring 'Space Weather.'
Low-latitude aurora observed during a magnetic storm.