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| 1 | The TanSat mission: preliminary global observations显示文摘The Chinese global carbon dioxide monitoring satellite (Tan Sat) was launched successfully in December2016 and has completed its on-orbit tests and calibration. Tan Sat aims to measure the atmospheric column-averaged dry air mole fractions of carbon dioxide (XCO_2) with a precision of 4 ppm at the regional scale, and in addition, to derive global and regional CO2fluxes. Progress towards these objectives is reviewed and the first scientific results from Tan Sat measurements are presented. Tan Sat on-orbit tests indicate that the Atmospheric Carbon dioxide Grating Spectrometer is in normal working status and is beginning to produce L1B products. The preliminary Tan Sat XCO_2products have been retrieved by an algorithm and compared to NASA Orbiting Carbon Observatory-2 (OCO-2) measurements during an overlapping observation period. Furthermore, the XCO_2retrievals have been validated against eight groundsite measurement datasets from the Total Carbon Column Observing Network, for which the preliminary conclusion is that Tan Sat has met the precision design requirement, with an average bias of 2.11 ppm.The first scientific observations are presented, namely, the seasonal distributions of XCO_2over land on a global scale. | Yi Liu Jing Wang Lu Yao Xi Chen Zhaonan Cai Dongxu Yang Zengshan Yin Songyan Gu Longfei Tian Naimeng Lu Daren Lyu | 2018 | Science Bulletin2018，63，18： | 23 |
| 2 | Improvements on global meteorological observations from the current Fengyun 3 satellites and beyond显示文摘The Fengyun 3(FY-3)series is the second generation of Chinese sun-synchronous meteorological satellites.The first two,FY-3A and FY-3B,were launched successfully on 27 May 2008 and 5 November 2010,respectively.FY-3A and FY-3B share the same design,equipped with 11 payloads to observe the Earth system,but FY-3A is on a monitoring-orbit and FY-3B is on an afternoon-orbit.As a satellite constellation,FY-3A and FY-3B comprehensively improved meteorological observations in spectral wavelength,spatial coverage,and temporal frequency.This paper summarizes the improvements of the FY-3A and FY-3B satellites.New features,including optical imaging capacity from kilometer to hundred-meter resolution,passive microwave imaging,atmospheric temperature and moisture sounding,atmospheric chemistry remote sensing,and Earth radiation budget measurement,are presented with demonstrations of their use.Instruments scheduled for the FY-3C and beyond are introduced as well. | Jun Yang Peng Zhang Naimeng Lu Zhongdong Yang Jinming Shi Chaohua Dong | 2012 | International Journal of Digital Earth2012，5，3： | 11 |
| 3 | The First Global Carbon Dioxide Flux Map Derived from TanSat Measurements显示文摘Space-borne measurements of atmospheric greenhouse gas concentrations provide global observation constraints for top-down estimates of surface carbon flux.Here,the first estimates of the global distribution of carbon surface fluxes inferred from dry-air CO_2 column (XCO_2) measurements by the Chinese Global Carbon Dioxide Monitoring Scientific Experimental Satellite (Tan Sat) are presented.An ensemble transform Kalman filter (ETKF) data assimilation system coupled with the GEOS-Chem global chemistry transport model is used to optimally fit model simulations with the Tan Sat XCO_2 observations,which were retrieved using the Institute of Atmospheric Physics Carbon dioxide retrieval Algorithm for Satellite remote sensing (IAPCAS).High posterior error reduction (30%–50%) compared with a priori fluxes indicates that assimilating satellite XCO_2 measurements provides highly effective constraints on global carbon flux estimation.Their impacts are also highlighted by significant spatiotemporal shifts in flux patterns over regions critical to the global carbon budget,such as tropical South America and China.An integrated global land carbon net flux of 6.71±0.76 Gt C yr^(-1) over12 months (May 2017–April 2018) is estimated from the Tan Sat XCO_2 data,which is generally consistent with other inversions based on satellite data,such as the JAXA GOSAT and NASA OCO-2 XCO_2 retrievals.However,discrepancies were found in some regional flux estimates,particularly over the Southern Hemisphere,where there may still be uncorrected bias between satellite measurements due to the lack of independent reference observations.The results of this study provide the groundwork for further studies using current or future Tan Sat XCO_2 data together with other surfacebased and space-borne measurements to quantify biosphere–atmosphere carbon exchange. | Dongxu YANG Yi LIU Liang FENG Jing WANG Lu YAO Zhaonan CAI Sihong ZHU Naimeng LU Daren LYU | 2021 | Advances in Atmospheric Sciences2021，38，9： | 5 |
| 4 | A New TanSat XCO2 Global Product towards Climate Studies显示文摘The 1st Chinese carbon dioxide(CO2)monitoring satellite mission,TanSat,was launched in 2016.The 1st TanSat global map of CO2 dry-air mixing ratio(XCO2)measurements over land was released as version 1 data product with an accuracy of 2.11 ppmv(parts per million by volume).In this paper,we introduce a new(version 2)TanSat global XCO2 product that is approached by the Institute of Atmospheric Physics Carbon dioxide retrieval Algorithm for Satellite remote sensing(IAPCAS),and the European Space Agency(ESA)Climate Change Initiative plus(CCI+)TanSat XCO2 product by University of Leicester Full Physics(UoL-FP)retrieval algorithm.The correction of the measurement spectrum improves the accuracy(−0.08 ppmv)and precision(1.47 ppmv)of the new retrieval,which provides opportunity for further application in global carbon flux studies in the future.Inter-comparison between the two retrievals indicates a good agreement,with a standard deviation of 1.28 ppmv and a bias of−0.35 ppmv. | Dongxu YANG Yi LIU Hartmut BOESCH Lu YAO Antonio DI NOIA Zhaonan CAI Naimeng LU Daren LYU Maohua WANG Jing WANG Zengshan YIN Yuquan ZHENG | 2021 | Advances in Atmospheric Sciences2021，38，1： | 4 |
| 5 | A New Global Solar-induced Chlorophyll Fluorescence(SIF)Data Product from TanSat Measurements显示文摘The Chinese Carbon Dioxide Observation Satellite Mission(TanSat)is the third satellite for global CO2 monitoring and is capable of detecting weak solar-induced chlorophyll fluorescence(SIF)signals with its advanced technical characteristics.Based on the Institute of Atmospheric Physics Carbon Dioxide Retrieval Algorithm for Satellite Remote Sensing(IAPCAS)platform,we successfully retrieved the TanSat global SIF product spanning the period of March 2017 to February 2018 with a physically based algorithm.This paper introduces the new TanSat SIF dataset and shows the global seasonal SIF maps.A brief comparison between the IAPCAS TanSat SIF product and the data-driven SVD(singular value decomposition)SIF product is also performed for follow-up algorithm optimization.The comparative results show that there are regional biases between the two SIF datasets and the linear correlations between them are above 0.73 for all seasons.The future SIF data product applications and requirements for SIF space observation are discussed. | Lu YAO Dongxu YANG Yi LIU Jing WANG Liangyun LIU Shanshan DU Zhaonan CAI Naimeng LU Daren LYU Maohua WANG Zengshan YIN | 2021 | Advances in Atmospheric Sciences2021，38，3： | 3 |
| 6 | TanSat Mission Achievements: from Scientific Driving to Preliminary Observations显示文摘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. | LIU Yi WANG Jing YAO Lu CHEN Xi CAI Zhaonan YANG Dongxu YIN Zengshan GU Songyan TIAN Longfei LU Naimeng L Daren | 2018 | 空间科学学报2018，38，5： | 2 |
| 7 | The Fengyun 3 micro- wave radiation imager on-orbit verification 显示文摘 | Yang Hu Weng Fuzhong Lu Naimeng | 2011 | IEEE Transaction on C eoscience and Remote Sensing2011，49，11： | 1 |
| 8 | Overvew of FY-3 payloud and ground application system 显示文摘 | Yang Zhongdong Lu Naimeng Shi Jinmin | 2012 | IEEE Transac- tions on Geoscience and Remote Sensing2012，50，12： | 1 |
| 9 | Production and application of Baosteel inorganic-lubricant-coated galvannealed automobile steel sheet显示文摘The inorganic-lubricant-coated galvannealed automobile steel sheet is a new product that improves the press formability of automobile body panels.In this paper,the production process,physical and chemical properties,press formability,and corrosion resistance of this new automobile steel sheet were discussed.Test results show that this inorganic solid-lubricant galvannealed automobile steel sheet has good surface friction characteristics and press formability.This product also meets the automobile industry’s requirements for press formability,phosphate pro-perties,and corrosion resistance after coating. | ZHANG Jun WEN Naimeng LU Haifeng | 2021 | Baosteel Technical Research2021，15，3： | 0 |
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