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| Titel |
4D tropospheric tomography using GPS slant wet delays |
| VerfasserIn |
A. Flores, G. Ruffini, A. Rius |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 18, no. 2 ; Nr. 18, no. 2, S.223-234 |
| Datensatznummer |
250013911
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| Publikation (Nr.) |
 copernicus.org/angeo-18-223-2000.pdf |
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| Zusammenfassung |
Tomographic techniques are successfully
applied to obtain 4D images of the tropospheric refractivity in a local dense
network of global positioning system (GPS) receivers. We show here how GPS data
are processed to obtain the tropospheric slant wet delays and discuss the
validity of the processing. These slant wet delays are the observables in the
tomographic processing. We then discuss the inverse problem in 4D tropospheric
tomography making extensive use of simulations to test the system and define the
resolution and the impact of noise. Finally, we use data from the Kilauea
network in Hawaii for February 1, 1997, and a local 4×4×40 voxel grid on a
region of 400 km2 and 15 km in height to produce the corresponding 4D
wet refractivity fields, which are then validated using forecast analysis from
the European Center for Medium Range Weather Forecast (ECMWF). We conclude that
tomographic techniques can be used to monitor the troposphere in time and space.
Key words: Radio science (remote sensing; instruments
and techniques) |
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