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| Titel |
Validation of stratospheric and mesospheric ozone observed by SMILES from International Space Station |
| VerfasserIn |
Y. Kasai, H. Sagawa, D. Kreyling, E. Dupuy, P. Baron, J. Mendrok, K. Suzuki, T. O. Sato, T. Nishibori, S. Mizobuchi, K. Kikuchi, T. Manabe, H. Ozeki, T. Sugita, M. Fujiwara, Y. Irimajiri, K. A. Walker, P. F. Bernath, C. Boone, G. Stiller, T. Clarmann, J. Orphal, J. Urban, D. Murtagh, E. J. Llewellyn, D. Degenstein, A. E. Bourassa, N. D. Lloyd, L. Froidevaux, M. Birk, G. Wagner, F. Schreier, J. Xu, P. Vogt, T. Trautmann, M. Yasui |
| 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 ; 6, no. 9 ; Nr. 6, no. 9 (2013-09-10), S.2311-2338 |
| Datensatznummer |
250085058
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| Publikation (Nr.) |
 copernicus.org/amt-6-2311-2013.pdf |
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| Zusammenfassung |
| We observed ozone (O3) in the vertical
region between 250 and 0.0005 hPa (~ 12–96 km) using
the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) on the
Japanese Experiment Module (JEM) of the International Space Station (ISS)
between 12 October 2009 and 21 April 2010. The new 4 K
superconducting heterodyne receiver technology of SMILES allowed us to
obtain a one order of magnitude better signal-to-noise ratio for the
O3 line observation compared to past spaceborne microwave
instruments. The non-sun-synchronous orbit of the ISS allowed us to observe
O3 at various local times.
We assessed the quality of the vertical profiles of O3
in the 100–0.001 hPa (~ 16–90 km) region for the
SMILES NICT Level 2 product version 2.1.5. The evaluation is based on four
components: error analysis; internal comparisons of observations targeting
three different instrumental setups for the same O3
625.371 GHz transition; internal comparisons of two different
retrieval algorithms; and external comparisons for various local times with
ozonesonde, satellite and balloon observations (ENVISAT/MIPAS,
SCISAT/ACE-FTS, Odin/OSIRIS, Odin/SMR, Aura/MLS, TELIS).
SMILES O3
data have an estimated absolute accuracy of better than 0.3 ppmv
(3%) with a vertical resolution of 3–4 km over the 60 to
8 hPa range. The random error for a single measurement is better
than the estimated systematic error, being less than 1, 2, and
7%, in the 40–1, 80–0.1, and
100–0.004 hPa pressure regions, respectively. SMILES O3
abundance was 10–20% lower than all other satellite measurements at
8–0.1 hPa due to an error arising from uncertainties of the tangent
point information and the gain calibration for the intensity of the
spectrum. SMILES O3 from observation frequency Band-B had better accuracy than that from Band-A.
A two month period is required to
accumulate measurements covering 24 h in local time of O3 profile.
However such a dataset can also contain variation due to dynamical, seasonal, and latitudinal
effects. |
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