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JEM/SMILES limb sounder: the L2 research project

Philippe Baron(1) and Yasuko Kasai(1)

(1) NICT, Koganei, 184-8795, Japan


The Superconducting Submillimeter-wave Limb Emission Sounder (SMILES) will realize high accuracy observations of trace constituents from the upper troposphere to the mesosphere. It will start to operate by the end of September 2009 from the Japanese Experiments Module (JEM) aboard the International Space Station (ISS). The geophysical data will be produced both by the Japan Aerospace Exploration Agency (JAXA) and the National Institute of Information and Communications Technology (NICT). The JAXA processing chain aims to routinely produce the main SMILES data. On the other hand, the NICT chain is a scientific tool to validate and to improve current JAXA algorithms, and also to produce additional data that are not in the main products. The NICT products are named level 2 research products (L2r).

The main SMILES products are O3, HCl, ClO, HOCl, CH3CN, HNO3, BrO, HO2, in the altitude range 15-60 km.

The additional data in the L2r products are mesospheric constituents (60-90 km) and upper-troposphere/lower stratosphere ice water vapor content and humidity. The L2r products might also contain data from the attempt to retrieve geophysical information from very low signal to noise ratio lines such as those from ClOOCl, OClO, SO2 molecules.

In this presentation, on behalf of the SMILES retrieval team, we will focus on the L2 research products. The retrieval chain and the product will be presented. The procedure to access and use the SMILES data will be given.