1,720,995 research outputs found
Monitoring terrain movements by means of sparse SAR differential interferometric measurements
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Analysis and correction of artifacts on differential SAR interferometry for the study of subsidence phenomena
No full textThis paper deals with the analysis and correction of artifacts on differential synthetic aperture radar (SAR) interferometry. Particularly, we concentrate on those artifacts arising from the use in interferometric processing of low accuracy acquisition geometry data. To remove these artifacts, we propose a new algorithm able to estimate the acquisition geometry parameters with high accuracy directly from the SAR data. The application of the proposed technique to the study of the subsidence phenomena in Bologna (Italy) and the surrounding area is also presented to validate the new algorithm
Utilisation of Earth Remote Sensing Techniques for the Proper Management of Earthquake Disaster
No full textUtilisation of Earth Remote Sensing Techniques for the Proper Management of Earthquake Disaster
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Fotogrammetria digitale per la generazione di un DTM di supporto al SAR: il caso dell’Irpinia
No full textCorrection of artifacts on differential SAR interferometry for the study of subsidence phenomena in urban and suburban areas
No full textThis paper deals with the analysis and correction of artifacts on differential synthetic aperture radar (SAR) interferometry applied for monitoring urban and suburban areas. Particularly, those artifacts arising from the use in interferometric processing of low accuracy acquisition geometry data are considered. To remove these artifacts, we propose a new algorithm able to estimate the acquisition geometry parameters relevant to the interferometric processing with high accuracy directly from the SAR data. In order to validate the proposed algorithm, the results obtained by applying the new technique to the study of the subsidence phenomena in Bologna (Italy) and the surrounding area are presented and compared to the results obtained by using in the interferometric processing the precise orbit data provided by the Delft Institute for Earth Oriented Space Research (DEOS)
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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