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| Titel |
The pre-launch status of TanSat Mission: Instrument, Retrieval algorithm, Flux inversion and Validation |
| VerfasserIn |
Yi Liu, Zengshan Yin, Zhongdong Yang, Yuquan Zheng, Changxiang Yan, Xiangjun Tian, Dongxu Yang |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250123992
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| Publikation (Nr.) |
 EGU/EGU2016-3345.pdf |
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| Zusammenfassung |
| After 5 years development, The Chinese carbon dioxide observation satellite (TanSat), the
first scientific experimental CO2 satellite of China, step into the pre-launch phase.
The characters of pre-launch carbon dioxide spectrometer have been optimized
during the laboratory test and calibration. Radiometric calibration shows a SNR of
440 (O2A 0.76um band), 300 (CO2 1.61um band) and 180 (CO2 2.06um band) on
average in the typical radiance condition. Instrument line shape was calibrated
automatically in using a well design testing system with laser control and record. After a
series of test and calibration in laboratory, the instrumental performances meet
the design requirements. TanSat will be launched on August 2016. The optimal
estimation theory was involved in TanSat XCO2 retrieval algorithm in a full physics way
with simulation of the radiance transfer in atmosphere. Gas absorption, aerosol and
cirrus scattering and surface reflectance associate with wavelength dispersion have
been considered in inversion for better correction the interference errors to XCO2.
In order to simulate the radiance transfer precisely and efficiently, we develop a
fast vector radiative transfer simulation method. Application of TanSat algorithm
on GOSAT observation (ATANGO) is appropriate to evaluate the performance of
algorithm. Validated with TCCON measurements, the ATANGO product achieves a
1.5 ppm precision. A Chinese carbon cycle data- assimilation system Tan-Tracker
is developed based on the atmospheric chemical transport model GEOS-Chem.
Tan-Tracker is a dual-pass data-assimilation system in which both CO2 concentrations
and CO2 fluxes are simultaneously assimilated from atmospheric observations. A
validation network has been established around China to support a series of CO2
satellite of China, which include 3 IFS-125HR and 4 Optical Spectrum Analyzer
etc. |
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