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Earth Science Seminar

Carbon Dioxide and Methane Measurement from Space (GOSAT Mission and the Data Status)
Presented by Tatsuya Yokota
National Institute for Environmental Studies, Japan

Thursday, June 17, 2010
3:00 P.M. in 321 Auditorium

The Greenhouse Gases Observing Satellite “IBUKI” (GOSAT) was launched on January 23, 2009. The GOSAT project is a joint effort of the Ministry of the Environment, the National Institute for Environmental Studies (NIES), and Japan Aerospace Exploration Agency (JAXA). The primary purpose of GOSAT is to make time-dependent, global measurements of greenhouse gases (GHGs): carbon dioxide and methane abundances. The second one is to contribute toward the efforts of the environmental administration in making assessments of forest carbon balance and GHG flux on a regional basis, through improving the accuracy of estimating the GHG emission and absorption (carbon flux) on a sub-continental scale. Also, GOSAT is expected to lay the technical foundations for the future GHG measurement and earth-observing satellites. The GOSAT main sensor (TANSO-FTS) detects the signal of reflected solar light on the earth's surface as well as that of thermal emitted radiance from the surface and the atmosphere. The GOSAT sub-sensor TANSO-Cloud and Aerosol Imager (TANSO-CAI) is a radiometer to obtain the information on cloud and aerosols that contaminate the FTS signals. GOSAT Level 2 data products (versions 00.50 and 00.80) of carbon dioxide and methane have been distributed to general users since February 18, 2010. Outline of the GOSAT mission concept, data retrieval algorithm, data validation status, characteristics and known issues of the present GOSAT data products, and improvement plan of the retrieval method will be presented. JPL Contact: Carol Bruegge; Miller, Charles E (3280); Crisp, David (3200)

About the Speaker
Tatsuya Yokota is the chief of Satellite Remote Sensing Research Section, Center for Global Environmental Research (CGER), National Institute for Environmental Studies (NIES), Japan. He is the NIES GOSAT project leader. He was involved in several Japanese satellite remote sensing projects, ILAS, ILAS-II, and SOFIS for polar ozone layer monitoring. REF:,

SVCP Earth Science

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