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| Titel |
Two-dimensional performance of MIPAS observation modes in the upper-troposphere/lower-stratosphere |
| VerfasserIn |
M. Carlotti, E. Castelli, E. Papandrea |
| 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 ; 4, no. 2 ; Nr. 4, no. 2 (2011-02-25), S.355-365 |
| Datensatznummer |
250001679
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| Publikation (Nr.) |
 copernicus.org/amt-4-355-2011.pdf |
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| Zusammenfassung |
| In this paper we analyze the performance of the three MIPAS (Michelson
Interferometer for Passive Atmospheric Sounding) observation modes that
sound the Upper-Troposphere/Lower-Stratosphere (UT/LS) region. The
two-dimensional (2-D) tomographic retrieval approach is assumed to derive the
atmospheric field of geophysical parameters. For each observation mode we
have calculated the 2-D distribution of the information load quantifier relative to the main
MIPAS targets. The performance of the observation modes has been evaluated
in terms of strength and spatial coverage of the information-load
distribution along the full orbit. The indications of the information-load
analysis has been validated with simulated retrievals based on the
observational parameters of real orbits. In the simulation studies we have
assessed the precision and the spatial (both horizontal and vertical)
resolution of the retrieval products. The performance of the three
observation modes has been compared for the MIPAS main products in both the
UT/LS and the extended altitude range. This study shows that the two
observation modes that were specifically designed for the UT/LS region are
actually competitive with the third one, designed for the whole
stratosphere, up to altitudes that far exceed the UT/LS. In the UT/LS the
performance of the two specific observation modes is comparable even if the
best performance in terms of horizontal resolution is provided by the
observation mode that was excluded by the European Space Agency (ESA) from
the current MIPAS duty cycle. This paper reports the first application of
the information-load analysis and highlights the worthiness of this approach
to make qualitative considerations about retrieval potential and selection
of retrieval grid. |
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