. Scientific Objectives

 One of the most unique characteristics of the SMILES observation is its high sensitivity in detecting atmospheric limb emission of the submillimeter wave range. The figure below shows an example of the limb-emission spectra to be observed by SMILES. Molecular species to be observed by SMILES are:

 normal O₃, isotope O₃, BrO、CH₃CN、ClO、HCl、HNO₃、HOCl、HO₂

Thus, the SMILES mission is distinguished as that focusing on the detailed halogen chemistry related to ozone destruction in order to clarify variation and its impact of radical species. Several radical species which will be measured by SMILES have never been observed by any other satellite measurements with high accuracy, and the SMILES mission will be the first to detect them such as BrO.