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| Titel |
Present Status and Plan of the GOSAT Level 2 Data Processing and Validation |
| VerfasserIn |
T. Yokota, H. Watanabe, O. Uchino, I. Morino, Y. Yoshida, S. Maksyutov |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250028618
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| Zusammenfassung |
| The Greenhouse gases Observing SATellite (GOSAT) is scheduled to be launched during the
period between January 21 and February 28, 2009. The main target of the GOSAT
observation is obtaining column abundances of global CO2 and CH4. For three months after
the launch, functional tests and tuning of the satellite and the onboard sensors will be
performed by the Japan Aerospace Exploration Agency (JAXA) as the initial check-out
(ICO). After the ICO period, the GOSAT mission data (i.e. observational Level 1 data) will
be transferred from JAXA to the GOSAT Data Handling Facility (DHF) at the National
Institute for Environmental Studies (NIES) for further processing. In the next three months
after the ICO period, NIES will conduct testing and tuning of the operational system of the
GOSAT DHF and the initial data validation. JAXA will calibrate sensors onboard
the satellite during that time. Level 1 data (interferogram and spectra for Thermal
And Near infrared Sensor for carbon Observation-Fourier Transform Spectrometer
(TANSO-FTS) and uncorrected data for Cloud and Aerosol Imager (TANSO-CAI)) will be
generated by JAXA. Then, the data will be transferred to GOSAT DHF at NIES for
producing CAI Level 1B data (geometric and radiometric correction), Level 2 data
(FTS-generated CO2 and CH4 column abundances, CAI-generated cloud flag data, and
cloud and aerosol properties), and other higher-level data products. NIES is also
responsible for developing the data processing algorithms, validating data quality, and
managing generated data products. As for the data validation, the column abundances or
column averaged volume mixing ratios of CO2 and CH4 (Level 2 data) will be
validated by utilizing the ground-based FTS network (Total Carbon Column Network:
TCCON) data collected at worldwide observation sites in Tsukuba (Japan), Darwin
(Australia), Lauder (New Zealand), Bremen (Germany), Park Falls (USA), and
others. We expect that the transfer of several GOSAT mission data (i.e. observational
Level 1 data) from JAXA to NIES to be completed before the start of 2009 EGU
General Assembly, where we present the current status of data processing at the
NIES GOSAT DHF. Also, samples of tentative validation data will be shown there. |
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