The Status and Plan of Chinese Carbon Dioxide Satellite (TanSat)
Liu, Yi1; Cai, Zhaonan1; Yang, Dongxu1; Duan, Minzheng1; Lv, Daren1; Yin, Zengshan2; Yang, Zhongdong3; Zheng, Yuquan4; Yan, Changxiang4
1Institute of Atmospheric Physics, Chinese Academy of Sciences, CHINA; 2Shanghai Engineering Center for Microsatellits, Chinese Academy of Sciences, CHINA; 3National Satellite Meteorological Center, CHINA; 4Changchun Institute of Optics, Fine Mechanics and Physics,Chinese Academy of Sciences, CHINA

The Chinese carbon dioxide observation satellite (TanSat) project is the first Chinese Greenhouse Gas satellite mission, it monitor carbon dioxide with XCO2 precision of 1-4ppm over regional scale. Two detectors have just finished design, the main instrument is a high resolution grating spectrometer that measure reflected sunlight with the 0.76 μm O2 A-band and two CO2 bands at 1.61 and 2.06 μm, the second one is the Cloud and Aerosol Polarization Imager (CAPI), which is a wide field of view moderate resolution imaging spectrometer, it include 0.38, 0.67, 0.87, 1.375 and 1.64μm channels, with two polarization channels in 0.67μm and 1.64μm. A full physical optimal estimation method has be developed to retrieve the column-averaged CO2 dry air mole fraction (XCO2), and CAPI will provide ancillary data for cloud detection and aerosol correction. Global and regional surface CO2 flux will be derived from XCO2 observations with inverse modeling. Ground based validation network has being established around China. Currently, we are passing through the preliminary design review and will finish critical design review at the end of 2014, satellite readiness review and launching will be scheduled from Dec. 2014 to June 2015.