| TanSat Mission Achievements: from Scientific Driving to Preliminary Observations |
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| 作者姓名： | LIU Yi WANG Jing YAO Lu CHEN Xi CAI Zhaonan YANG Dongxu YIN Zengshan GU Songyan TIAN Longfei LU Naimeng L Daren |
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| 作者单位： | 1 Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; |
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| 基金项目： | Supported by National Key R&D Program of China (2016YFA0600203, 2017YFB0504000), the National High-tech Research and Development Program (2011AA12A104), External Cooperation Program of the Chinese Academy of Sciences (GJHZ1507) |
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| 摘 要： | The Chinese global carbon dioxide monitoring satellite (TanSat) was successfully launched in December 2016 and has completed its on-orbit tests and calibration. TanSat aims to measure the atmospheric Carbon Dioxide column-averaged dry air mole fractions (XCO2) with a precision of 4 ppm at the regional scale, and further to derive the CO2 global and regional fluxes. Progress toward these objectives is reviewed and the first scientific results from TanSat measurements are presented. During the design phase, Observation System Simulation Experiments (OSSE) on TanSat measurements performed prior to launch measurements using a nadir and a glint alternative mode when considering the balance of stable measurements and reduces the flux uncertainty (64%). The constellation measurements of two satellites indicate an extra 10% improvement in flux inversion if the satellite measurements have no bias and similar precision. The TanSat on-orbit test indicates that the instrument is stable and beginning to produce XCO2 products. The preliminary TanSat measurements have been validated with Total Carbon Column Observing Network (TCCON) measurements and have inter-compared with OCO-2 measurements in an overlap measurement.
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| 关 键 词： | TanSat Carbon dioxide Retrieval algorithm Carbon flux inversion |
| 收稿时间： | 2017-06-20 |
TanSat Mission Achievements: from Scientific Driving to Preliminary Observations |
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| Institution: | 1 Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;2 University of Chinese Academy of Sciences, Beijing 100190;3 Shanghai Engineering Center for Microsatellites, Shanghai 201203;4 National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081 |
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| Abstract: | The Chinese global carbon dioxide monitoring satellite(TanSat)was successfully launched in December 2016 and has completed its on-orbit tests and calibration.TanSat aims to measure the atmospheric Carbon Dioxide column-averaged dry air mole fractions(X_(CO_2))with a precision of 4 ppm at the regional scale,and further to derive the CO_2 global and regional fluxes.Progress toward these objectives is reviewed and the first scientific results from TanSat measurements are presented.During the design phase,Observation System Simulation Experiments(OSSE)on TanSat measurements performed prior to launch measurements using a nadir and a glint alternative mode when considering the balance of stable measurements and reduces the flux uncertainty(64%).The constellation measurements of two satellites indicate an extra 10%improvement in flux inversion if the satellite measurements have no bias and similar precision.The TanSat on-orbit test indicates that the instrument is stable and beginning to produce X_(CO_2)products.The preliminary TanSat measurements have been validated with Total Carbon Column Observing Network(TCCON)measurements and have inter-compared with OCO-2 measurements in an overlap measurement. |
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