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| Titel |
Carbon Monitoring Satellite (CarbonSat): Error analysis for XCO2, XCH4 and secondary products such as Vegetation Chlorophyll Fluorescence |
| VerfasserIn |
Michael Buchwitz, Heinrich Bovensmann, Maximilian Reuter, Jens Heymann, Oliver Schneising, John P. Burrows, Hartmut Boesch, Yasjka Meijer, Bernd Sierk, Armin Löscher, Paul Ingmann |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250074163
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| Zusammenfassung |
| CarbonSat is one of two candidate missions for ESA’s Earth Explorer 8 (EE8) to be
launched around 2019. Using the most recent instrument and mission specification,
an error analysis has been performed using the latest versions of algorithms for
retrieving CarbonSat’s geophysical parameters. This comprises the definition of
relevant geophysical scenarios, radiative transfer and instrument simulations to
generate simulated radiance spectra as will be measured by CarbonSat, and the
application of retrieval algorithms. Error analysis results have been obtained for the
CarbonSat’s primary products, which are the column-averaged dry air mole fractions of
CO2 and CH4, denoted XCO2 and XCH4, but also for its secondary products such
as Vegetation Chlorophyll Fluorescence. Random errors are primarily a result of
instrument noise and are standard output of the retrieval algorithms. Systematic
errors (biases) are determined by computing the difference between the retrieved
value and the true value known from the model atmosphere. Biases are caused by a
number of potentially important error sources such as undetected thin cirrus clouds,
aerosols and residual errors from imperfect spectral and radiometric calibration. In this
presentation results from a recent error analysis are presented focusing on nadir
observations. First results for sun-glint observations over the ocean will also be
presented. |
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