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| Titel |
New calibration noise suppression techniques for the GLORIA limb imager |
| VerfasserIn |
T. Guggenmoser, J. Blank, A. Kleinert, T. Latzko, J. Ungermann, F. Friedl-Vallon, M. Höpfner, M. Kaufmann, E. Kretschmer, G. Maucher, T. Neubert, H. Oelhaf, P. Preusse, M. Riese, H. Rongen, M. K. Sha, O. Sumińska-Ebersoldt, V. Tan |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 8 ; Nr. 8, no. 8 (2015-08-07), S.3147-3161 |
| Datensatznummer |
250116521
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| Publikation (Nr.) |
 copernicus.org/amt-8-3147-2015.pdf |
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| Zusammenfassung |
| The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA)
presents new opportunities for the retrieval of trace gases in the upper
troposphere and lower stratosphere. The radiometric calibration of the
measured signal is achieved using in-flight measurements of reference
blackbody and upward-pointing "deep space" scenes. In this paper, we
present techniques developed specifically to calibrate GLORIA data
exploiting the instrument's imaging capability. The algorithms discussed here
make use of the spatial correlation of parameters across GLORIA's detector
pixels in order to mitigate the noise levels and artefacts in the calibration
measurements. This is achieved by combining a priori and empirical knowledge
about the instrument background radiation with noise-mitigating compression
methods, specifically low-pass filtering and principal component analysis
(PCA). In addition, a new software package for the processing of GLORIA data
is introduced which allows us to generate calibrated spectra from raw
measurements in a semi-automated data processing chain. |
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