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| Titel |
Application of GPS radio occultation to the assessment of temperature profile retrievals from microwave and infrared sounders |
| VerfasserIn |
M. Feltz, R. Knuteson, S. Ackerman, H. Revercomb |
| 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 ; 7, no. 11 ; Nr. 7, no. 11 (2014-11-12), S.3751-3762 |
| Datensatznummer |
250115948
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| Publikation (Nr.) |
 copernicus.org/amt-7-3751-2014.pdf |
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| Zusammenfassung |
| Comparisons of satellite temperature profile products from GPS radio
occultation (RO) and hyperspectral infrared (IR)/microwave (MW) sounders are
made using a previously developed matchup technique. The profile matchup
technique matches GPS RO and IR/MW sounder profiles temporally, within 1 h,
and spatially, taking into account the unique RO profile geometry and
theoretical spatial resolution by calculating a ray-path averaged sounder
profile. The comparisons use the GPS RO dry temperature product. Sounder
minus GPS RO differences are computed and used to calculate bias and rms
profile statistics, which are created for global and 30° latitude
zones for selected time periods. These statistics are created from various
combinations of temperature profile data from the Constellation Observing
System for Meteorology, Ionosphere & Climate (COSMIC) network, Global
Navigation Satellite System Receiver for Atmospheric Sounding (GRAS)
instrument, and the Atmospheric Infrared Sounder (AIRS)/Advanced Microwave
Sounding Unit (AMSU), Infrared Atmospheric Sounding Interferometer
(IASI)/AMSU, and Crosstrack Infrared Sounder (CrIS)/Advanced Technology
Microwave Sounder (ATMS) sounding systems. By overlaying combinations of
these matchup statistics for similar time and space domains, comparisons of
different sounders' products, sounder product versions, and GPS RO products
can be made. The COSMIC GPS RO network has the spatial coverage, time
continuity, and stability to provide a common reference for comparison of
the sounder profile products. The results of this study demonstrate that GPS
RO has potential to act as a common temperature reference and can help
facilitate inter-comparison of sounding retrieval methods and also highlight
differences among sensor product versions. |
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