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São José dos Campos, Brazil

Perna S.,CNR Institute for Electromagnetic Sensing of the Environment | Perna S.,Parthenope University of Naples | Esposito C.,CNR Institute for Electromagnetic Sensing of the Environment | Esposito C.,University of Sannio | And 4 more authors.
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2013

Synthetic Aperture Radar Interferometry (InSAR) allows the generation of Digital Elevation Models (DEMs) exploiting the phase difference (interferogram) of SAR data pairs relevant to the same illuminated area and received by slightly different look angles. © 2013 IEEE. Source


Perna S.,CNR Institute of Neuroscience | Perna S.,Parthenope University of Naples | Wimmer C.,Orbisat Remote Sensing | Moreira J.,Orbisat Remote Sensing | Fornaro G.,CNR Institute of Neuroscience
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2010

Differential SAR Interferometry (DInSAR) is a remote sensing technique which allows monitoring ground deformation with accuracy of the order of the transmitted wavelength by exploiting the phase difference (interferogram) of two temporally separated SAR images relevant to the same area. In addition, when more than two multi-pass acquisitions relevant to the same area are available, they can be properly combined by means of recent multitemporal DInSAR algorithms, in order to detect and follow the temporal evolution of ground deformation via the generation of spatially dense time series. Such a multitemporal DInSAR technique is nowadays developed and operative with space-borne SAR data, whereas specific problems may limit its application to airborne data. In this work, starting from the results already shown in previous works and relevant to an X-Band airborne DInSAR experiment carried out over the Perugia area (center of Italy) by using the OrbiSAR system, we carry out a DInSAR multitemporal analysis of data relevant to a 16 km (in azimuth) by 4 km (in range) region. © 2010 IEEE. Source


Perna S.,Parthenope University of Naples | Perna S.,CNR Institute for Electromagnetic Sensing of the Environment | Esposito C.,CNR Institute for Electromagnetic Sensing of the Environment | Esposito C.,University of Sannio | And 4 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

Synthetic Aperture Radar Interferometry (InSAR) is a technique for the generation of Digital Elevation Models (DEMs) of an observed scene. It exploits the phase difference (interferogram) of two SAR images relevant to the same area and acquired by two different look angles. To recover the topographic information from an InSAR data pair, it is necessary to evaluate a proper phase offset value to add to the unwrapped SAR interferogram. Generally, such a phase offset is accurately estimated by using Corner Reflectors (CRs) properly deployed over the illuminated area. Nevertheless, in some cases of practical interest, CRs cannot be used: in order to overcome this limit, different algorithms have been proposed in literature. In this paper, we present an algorithm aimed at estimating the InSAR phase-offset without using CRs. To this aim, we first present a theoretical analysis, validated by experiments carried out on simulated data, for the evaluation of the phase offset and, thereafter, we apply the proposed method on real data acquired by the X-band airborne OrbiSAR system. Comparisons with results achieved by using CRs properly deployed over the test site are also included. © 2013 SPIE. Source


Esposito C.,CNR Institute for Electromagnetic Sensing of the Environment | Esposito C.,University of Sannio | Amaral T.,Orbisat Remote Sensing | Lanari R.,CNR Institute for Electromagnetic Sensing of the Environment | And 6 more authors.
Joint Urban Remote Sensing Event 2013, JURSE 2013 | Year: 2013

The paper addresses the analysis of high resolution interferograms relevant to urban areas and achieved by means of the X-band OrbiSAR system. The OrbiSAR system is an airborne SAR sensor capable of acquiring single pass and repeat pass interferometric SAR data at very high resolution. Such a system is thus capable of providing very appealing single-pass and repeat-pass interferometric data-sets characterized by high resolution. In this work, two data-sets, acquired over the urbanized cities of São José dos Campos and São Sebastião-SP, Brazil, will be analyzed with a twofold aim: first, to provide insight for the retrieval of high accuracy DEM on urbanized areas, second to show some results obtainable with the airborne Differential SAR Interferometry technique over urban areas. © 2013 IEEE. Source


Perna S.,CNR Institute for Electromagnetic Sensing of the Environment | Perna S.,Parthenope University of Naples | Berardino P.,CNR Institute for Electromagnetic Sensing of the Environment | Britti F.,Consorzio Telaer | And 13 more authors.
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2012

This paper describes the capabilities of the TELAER X-Band airborne SAR system, which has been upgrading according to a Italian National Research Council (CNR) funding. Such a system upgrading consists first of all in the realization of a multi-antenna system able to carry out, simultaneously, Across-Track (XT) and Along-Track (AT) SAR Interferometry (InSAR). Moreover, the system upgrading is also aimed at improving the performances achievable in repeat-pass applications, such as Differential SAR Interferometry, (DInSAR), which require very precise measurement of the tracks described during the flight by the SAR antennas. © 2012 IEEE. Source

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