دورية أكاديمية
Atmospheric anomalies over Mt.Etna using GPS signal delays and tomography of radio wave velocities
| العنوان: | Atmospheric anomalies over Mt.Etna using GPS signal delays and tomography of radio wave velocities |
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| المؤلفون: | G. Puglisi, G. Immè, A. Bonforte, M. Aloisi, V. Bruno |
| المصدر: | Annals of Geophysics, Vol 50, Iss 2, Pp 267-282 (2007) |
| بيانات النشر: | Istituto Nazionale di Geofisica e Vulcanologia (INGV), 2007. |
| سنة النشر: | 2007 |
| المجموعة: | LCC:Meteorology. Climatology LCC:Geophysics. Cosmic physics |
| مصطلحات موضوعية: | GPS, atmospheric anomalies, tropospheric delays, tomography of radio wave velocities, Meteorology. Climatology, QC851-999, Geophysics. Cosmic physics, QC801-809 |
| الوصف: | Due to the prominent topography of Mt. Etna, the use of satellite geodetic techniques may significantly suffer from atmospheric heterogeneities. This problem mainly affects the DInSAR technique. To overcome these drawbacks the present study attempts to make headway in measuring and interpreting atmospheric anomalies. We used the GAMIT software to obtain the ZTD (Zenith Total Delay) values for the GPS sessions performed on 1996-97, during ERS-2 passes at Mt. Etna. GAMIT software also allows to characterize the statistical behaviour of the tropospheric effects, by using residuals for each station-satellite pair, and to locate the atmospheric anomalies, present mostly at low altitudes. The attempt at using these results to produce a tomography of radio waves velocity of the troposphere suggests that the number of GPS stations used to investigate atmosphere is a critical point in such a study. The three stations are too few to invert anomalies eventually existing in the lower atmosphere. This result is a good starting point for better direct future study to verify the applicability of this tomographic technique to a geodetic network with a higher number of stations, with the aim of characterizing the lower atmosphere of Mt. Etna for a more accurate monitoring of ground deformations. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1593-5213 2037-416X |
| Relation: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4417; https://doaj.org/toc/1593-5213; https://doaj.org/toc/2037-416X |
| DOI: | 10.4401/ag-4417 |
| URL الوصول: | https://doaj.org/article/a620f5a14e8b475f9af02be6ddead223 |
| رقم الأكسشن: | edsdoj.620f5a14e8b475f9af02be6ddead223 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 15935213 2037416X |
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| DOI: | 10.4401/ag-4417 |