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| Titel |
First results from the GPS atmosphere sounding experiment TOR aboard the TerraSAR-X satellite |
| VerfasserIn |
G. Beyerle, L. Grunwaldt, S. Heise, W. Köhler, R. König, G. Michalak, M. Rothacher, T. Schmidt, J. Wickert, B. D. Tapley, B. Giesinger |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 13 ; Nr. 11, no. 13 (2011-07-13), S.6687-6699 |
| Datensatznummer |
250009910
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| Publikation (Nr.) |
 copernicus.org/acp-11-6687-2011.pdf |
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| Zusammenfassung |
| GPS radio occultation events observed between 24 July and 17 November 2008 by
the IGOR occultation receiver aboard the TerraSAR-X satellite are processed
and analyzed. The comparison of 15 327 refractivity profiles with collocated
ECMWF data yield a mean bias between zero and −0.30 % at altitudes
between 5 and 30 km. Standard deviations decrease from about 1.4 %
at 5 km to about 0.6 % at 10 km altitude, however, increase significantly in the upper stratosphere.
At low latitudes mean biases and standard deviations are larger, in particular in the lower
troposphere. The results are consistent with 15 159 refractivity
observations collected during the same time period by the BlackJack receiver
aboard GRACE-A and processed by GFZ's operational processing system. The main
difference between the two occultation instruments is the implementation of
open-loop signal tracking in the IGOR (TerraSAR-X) receiver which improves
the tropospheric penetration depth in terms of ray height by about 2 km
compared to the conventional closed-loop data acquired by BlackJack
(GRACE-A). |
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