Dissertations / Theses on the topic 'Interferometric Synthetic Aperture Radar (InSAR)'
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Becek, Kazimierz. "Biomass Representation in Synthetic Aperture Radar Interferometry Data Sets." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-62707.
Full textKhakim, Mokhamad Yusup Nur. "Synthetic Aperture Radar Interferometry for Natural Disaster and Reservoir Monitoring." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157546.
Full textFALABELLA, FRANCESCO. "Spaceborne and Terrestrial Synthetic Aperture Radar (SAR) Systems: Innovative Multi-temporal SAR Interferometric Methods and Applications." Doctoral thesis, Università degli studi della Basilicata, 2023. https://hdl.handle.net/11563/162987.
Full textMulti-temporal SAR interferometric (Mt-InSAR) techniques are nowadays mature tools to measure the temporal evolution of the Earth’s surface with millimetric accuracy. The reliability of crustal measurements is closely related to the goodness of the used Mt-InSAR algorithms in isolating the deformation-related signal from the overall signal, and this becomes increasingly complex as the noise levels of each interferogram increase. Canonical techniques are highly reliable in monitoring the displacement evolution of targets that are found to be largely stable or coherent over the entire period of analysis. Otherwise, when the scatterers are particularly affected by decorrelation problems, the obtained deformation estimates turn out to be corrupted and unreliable. Thus, there is a strong demand for new advanced Mt-InSAR processors that can provide accurate estimates of crustal deformation even in scenarios with more or less severe decorrelation problems. This thesis work focuses on the study of multi-temporal InSAR techniques applicable in both satellite and terrestrial case. Specifically, the canonical Mt-InSAR multigrid techniques for analyzing targets at the finest resolution grid will be discussed extensively highlighting their criticality in medium to low coherence areas, and in this context an innovative technique is proposed to better operate in decorrelated environments. The new method relies on efficient phase-unwrapping (PhU) operations performed at the native spatial scales. In particular, a set of multi-look (ML) interferograms is first unwrapped using conventional (or advanced) PhU algorithms at the regional scale. Subsequently, ML unwrapped interferograms are used to facilitate the PhU operations performed at the local scale (single-look). Specifically, the unwrapped multi-look interferograms are resampled to the single-look grid and modulo-2π subtracted to the single-look interferograms. These phase residuals are then unwrapped and added back to the multi-look resampled interferograms. To accomplish these operations, at variance with alternative multiscale methods, no (linear/nonlinear) models are used to fit the spatial high-pass phase residuals. Finally, the unwrapped single-look interferograms are properly inverted to retrieve the ground displacement time series using any small baseline (SB)-oriented multitemporal InSAR tool. Experimental results are performed by processing a set of SAR data acquired by the X-band COSMO-SkyMed sensor over the coastal area of Shanghai, China. Then, the focusing moves on the Weighted Least-squares (WLS) techniques applied within the InSAR framework for improving the performance of the phase unwrapping operations as well as for better conveying the inversion of sequences of unwrapped interferograms to generate ground displacement maps. In both cases, the identification of low-coherent areas, where the standard deviation of the phase is high, is requested. Therefore, a WLS method that extends the usability of the Mt-InSAR Small BAseline Subset (SBAS) algorithm in regions with medium-to-low coherence is presented. In particular, the proposed method relies on the adaptive selection and exploitation, pixel-by-pixel, of the medium-to-high coherent interferograms, only, so as to discard the noisy phase measurements. The selected interferometric phase values are then inverted by solving a WLS optimization problem. Noteworthy, the adopted, pixel-dependent selection of the “good” interferograms to be inverted may lead the available SAR data to be grouped into several disjointed subsets, which are then connected, exploiting the Weighted Singular Value Decomposition (WSVD) method. However, in some critical noisy regions, it may also happen that discarding of the incoherent interferograms may lead to rejecting some SAR acquisitions from the generated ground displacement time-series, at the cost of the reduced temporal sampling of the data measurements. Thus, variable-length ground displacement time-series are generated. The presented experiments have been carried out by applying the developed technique to a SAR dataset acquired by the COSMO-SkyMed (CSK) sensors over the Basilicata region, Southern Italy. In the continuation of the thesis work, the properties characterizing the phase non-closure of multi-look SAR interferograms are explored. Precisely, we study the implications of multi-look phase time incongruences on the generation of ground displacement time-series through SB Mt-InSAR methods. Our research clarifies how these phase inconsistencies can propagate through a time-redundant network of SB interferograms and contribute, along with PhU errors, to the quality of the generated ground displacement products. Moreover, we analyze the effects of short-lived phase bias signals that could happen in sequences of short baseline interferograms and propose a strategy for their mitigation. The developed methods have been tested using both simulated and real SAR data. The latter were collected by the Sentinel-1A/B (C-band) sensors over the study areas of Nevada state, U.S., and Sicily Island, Italy. After the development of algorithms for the satellite part, the work veers to ground-based SAR (GB-SAR) sensors. In this field, we propose a method for estimating and compensating the atmospheric phase screen (APS) in sets of SAR interferograms generated with a GB-SAR instrument. We address the presented approach’s physical, statistical, and mathematical framework by discussing its potential and limitations. In contrast with other existing algorithms that estimate the APS from the unwrapped phase signals, our methodology is based on the straightforward analysis of the wrapped phases, directly. Therefore, the method is not affected by any potential phase unwrapping mistake, and it is suitable for Mt-InSAR applications. The effects of the local topography, the decorrelation noise, and the ground deformation on the APS estimates are deeply studied. Experiments performed on simulated and real GB-SAR InSAR data corroborate the validity of the theory. In particular, the simulated results show that the method is beneficial in zones with medium-to-high topographic slopes (e.g., for Alpine and mountainous regions). Further, an interferometric SAR application for the study of three-dimensional (3-D) deformation through the joint and integrated use of satellite and ground SAR data is presented. More precisely, the interferometric data-combining technique exploits the innovative Mt-InSAR algorithms mentioned above, and allows obtaining 3-D mean displacement velocity maps at the finest spatial grid among the available data. In conclusion, also some interested satellite SAR applications in prevention and analysis of particular natural and human-induced disasters are given.
Palmer, Steven J. "Temporal fluctuations in the motion of Arctic ice masses from satellite radar interferometry." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4155.
Full textBin, Che Amat Muhammad Asyran. "Assessment of long-term deformation in Johor, Malaysia using Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR)." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/47430/.
Full textArai, Rei. "Application of synthetic aperture radar interferometry (InSAR) in defining groundwater-withdrawal-related subsidence, Diamond Valley, Nevada." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1467741.
Full textNikolaeva, Elena. "Landslide kinematics and interactions studied in central Georgia by using synthetic aperture radar interferometry, optical imagery and inverse modeling." Phd thesis, Universität Potsdam, 2014. http://opus.kobv.de/ubp/volltexte/2014/7040/.
Full textErdrutsche zählen zu den größten Naturgefahren in Georgien, ein gebirgiges Land im Kaukasus. Eine systematische Überwachung und Analyse der Dynamik von Erdrutschen in Georgien ist bisher nicht vorhanden. Da Erdrutsche durch extrinsische Prozesse ausgelöst werden, wird ihre Analyse zusammen mit Niederschlag und Erdbeben zu einer besonderen Herausforderung. In dieser Dissertation beschreibe ich die Potenziale und Limitierungen der Fernerkundung für die Detektion und das Verständnis von Erdrutschen in Georgien. Die Arbeit ist in einer kumulativen Form geschrieben, und besteht aus einer allgemeinen Einführung, drei Manuskripten sowie einer Zusammenfassung und einem Ausblick. In der vorliegenden Arbeit, Gestimme ich die Oberflächenverschiebung von aktiven Erdrutschen mit Methoden der Radarinterferometrie (InSAR). Die langsamen Erdrutsche (cm pro Jahr) konnten im einfachen Vergleich zeitlich unterschiedlicher Radaraufnahmen (two-pass InSAR), gut nachgewiesen werden. Die extrem langsamen Erdrutsche (mm pro Jahr) konnten hingegen nur mit InSAR Zeitreihentechniken nachgewiesen werden. Der Erfolg der angewandten InSAR Techniken wird durch die erfolgreiche Identifikation von bisher unbekannten Erdrutschen in Zentral Georgien veranschaulicht. Sowohl das Ausmaß als auch die Verschiebungsrate der Erdrutsche wurden quantifiziert. Ferner, um die mögliche Tiefe und Lage von potentiellen Gleitflächen zu bestimmen, wurden inverse Modelle entwickelt. Inverse Modellierung sucht nach Parametern der Quelle, welche die beobachtete Verschiebungsverteilung reproduzieren können. Ferner habe ich anhand der ermittelten Verschiebungsverteilung aus InSAR in Verbindung mit der Morphologie aus Luftaufnahmen das Volumen der untersuchten Erdrutsche empirisch abgeleitet. Ich habe eine Volumenformel für unseren Fall angepasst, und die verfügbaren Datensätze bezüglich Seismizität und Niederschlag kombiniert, um potenzielle auslösende Faktoren zu analysieren. Eine leitende Frage hierbei war: Was sind die Ursachen für die Beschleunigung von Erdrutschen, wie sie in den InSAR Daten beobachtet werden konnte? Das Untersuchungsgebiet in Zentral Georgien ist seismisch sehr aktiv. Als zusätzlichen Produkt der InSAR Datenanalyse wurde ein Deformationsgebiet gefunden, welches im Zusammenhang mit dem Mw=6.0 Erdbeben vom 7. September 2009 zusammenhängt. Beweise für Oberflächenbrüche, die direkt mit dem Erdbeben zusammenhängen, konnten in dem Gebiet nicht gefunden werden, jedoch konnten während und nach dem Erdbeben neue Erdrutsche beobachtet werden. Die Dissertation unterstreicht, dass Verformungsinformationen aus InSAR Analysen helfen können ein Gebiet, welches von Erdbebeninduzierten Erdrutschen gefährdet ist, zu kartieren. Potenziell stellt InSAR eine Technik dar, die von Bedeutung für die landesweite Überwachung von Erdrutschen sein kann, insbesondere im Hinblick auf die neuen Satellitensensoren, die in den kommenden Jahren verfügbar sein werden.
Zahiri, Hani. "Integration of Synthetic Aperture Radar Interferometry (InSAR) and Geographical Information Systems (GIS) for monitoring mining induced surface deformations." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/1835.
Full textKim, Jin Woo. "Applications of Synthetic Aperture Radar (SAR)/ SAR Interferometry (InSAR) for Monitoring of Wetland Water Level and Land Subsidence." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374107720.
Full textBaek, Sang-Ho. "DEM generation and ocean tide modeling over Sulzberger Ice Shelf, West Antarctica, using synthetic aperture radar interferometry." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1155745007.
Full textRoc, Roc David. "Above-ground biomass estimation in boreal productive forests using Sentinel-1 data." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-172942.
Full textDuncan, David P. "Motion Compensation of Interferometric Synthetic Aperture Radar." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd477.pdf.
Full textBekaert, David Peter Sonja. "Interferometric synthetic aperture radar for slow slip applications." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/11659/.
Full textChang, Hsing-Chung Surveying & Spatial Information Systems Faculty of Engineering UNSW. "Differential interferometric synthetic aperture radar for land deformation monitoring." Publisher:University of New South Wales. Surveying & Spatial Information Systems, 2008. http://handle.unsw.edu.au/1959.4/42602.
Full textChua, Song Liang. "Multi-baseline interferometric synthetic aperture radar applications and error analysis." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42250.
Full textIncludes bibliographical references (p. 127-130).
In this thesis, we deal primarily with the multi-baseline SAR configuration utilizing three satellites. Two applications of InSAR, multi-baseline height retrieval and multi-baseline compensation of CCD's slope biasing effects, are first examined in details. An optimal baseline-weighted height averaging technique is introduced. Phase averaging, a novel height retrieval technique, combines the multi-baseline phase data into one, such that only one set of heights is retrieved from the three-satellite configuration. This approach outperforms single baseline height retrieval and allows application of the conventional two-satellite height retrieval process on the multi-baseline data, without need for excessive modifications. Slope biasing effects, inherent in multilook coherence estimator, make it difficult to identify if low or medium coherence values are results of an actual scene change or an undulating terrain. This ambiguity can be best resolved by accounting for the topographic phase variations via prior knowledge of the original height profile, whose precise retrieval requires a multi-baseline satellite configuration. The three-satellite setup is then related to a realistic cartwheel configuration, where the resulting errors in the height retrieval and CCD process, due to the constant cartwheel rotation, are analyzed. It is found that baseline-weighted averaging becomes a necessary step for the correct and automated retrieval of heights while change detection works equally well when considering a realistic cartwheel setup, even though its performance becomes dependent on the cartwheel's start position. Lastly, errors in satellite positions are introduced and their impacts on height retrieval and CCD are studied.
(cont.) In CCD, it is shown that the effects of satellite position errors is minimal since in this case, only the local terrain profile rather than the absolute terrain matters. However, in height retrieval, small errors in the positions propagate into unacceptably large misalignments. Attempts to account for these errors without prior knowledge of any ground truths are also made, making use of cost minimization functions.
by Song Liang Chua.
S.M.
Udugbezi, Emmanuel. "Evaluating interferometric synthetic aperture radar coherence for coastal geomorphological changes." Thesis, University of Dundee, 2018. https://discovery.dundee.ac.uk/en/studentTheses/b127af25-c290-4fdf-ac44-96c77449fb59.
Full textHassenpflug, Ismail Gernot. "Investigation of developments in interferometric synthetic aperture radar until 1994." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/16091.
Full textThis thesis examines the topic of Synthetic Aperture Radar Interferometry in a historical perspective, tracing its development from its beginnings in the 1960s up until May 1994. Applications are listed and airborne and spaceborne implementations reviewed. The underlying theory of interferometry is explained, including a discussion of error sources, and a simulation for point targets is documented to illustrate the interferometric processing steps. The application of the SASAR VHF SAR system to interferometric operation is examined analytically.
Marom, Moshe. "Interferometric SAR imaging of ocean surface currents and wavefields." Thesis, Monterey, Calif. : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA239312.
Full textDissertation supervisor: Thornton, E.B. "June 1990." Description based on title screen as viewed on 19 October 2009. DTIC Identifiers: INSAR (INTERFEROMETRIC SAR). Author(s) subject terms: Interferometric SAR, scene coherence time, 2D wavenumber spectra, surface currents. Includes bibliographical references (p. 192-198). Also available in print.
Evans, Jack R. "Determining snow depth using airborne multi-pass interferometric synthetic aperture radar." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/37622.
Full textSnow accumulation is a significant factor for hydrological planning, flood prediction, trafficability, avalanche control, and numerical weather/climatological modeling. Current snow depth methods fall short of requirements. This research explores a new approach for determining snow depth using airborne interferometric synthetic aperture radar (InSAR). Digital elevation models (DEM) are produced for Snow Off and Snow On cases and differenced to determine elevation change from accumulated snow. Interferograms are produced using Multi-pass Single Look Complex airborne Ku-band SAR. Two approaches were attempted. The first is a classical method similar to spaceborne InSAR and relies on determining the baseline of the interferometric pair. The second used a perturbation method that isolates and compares high frequency terrain phase to elevation to generate a DEM. Manual snow depth measurements were taken to verify the results. The first method failed to obtain a valid baseline and therefore failed. The second method resulted in representative DEMs and average snow depth errors of -8cm, 95cm, -49cm, 176cm, 87cm, and 42cm for six SAR pairs respectively. Furthermore, Ku-band appeared to be a high enough frequency to avoid significant penetration of the snow. Results show that this technique has promise but still requires more research to refine its accuracy.
Jung, Hahn Chul. "Wetland Hydrodynamics Using Interferometric Synthetic Aperture Radar, Remote Sensing, and Modeling." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1291661296.
Full textColclough, S. J. "Investigations of Nyamuragira and Nyiragongo volcanoes (DRC), using Interferometric Synthetic Aperture Radar." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597821.
Full textJoughin, Ian. "Estimation of ice-sheet topography and motion using interferometric synthetic aperture radar /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/6030.
Full textRowan, Elaine Sian. "An evaluation of SAR interferometric coherence for the classification and monitoring of coastal geomorphology." Thesis, University of Dundee, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326674.
Full textManjunath, Deepak Gomez Francisco Gustavo. "Earthquake interaction along the Sultandagi-Aksehir fault based on InSar and coulomb stress modeling." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5788.
Full textThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on July 8, 2009) Includes bibliographical references.
El, Moussawi Ibrahim. "Synthetic Aperture Radar : Algorithms and Applications in Forests and Urban Areas." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG078.
Full textThe objective of this thesis is to exploit Multi-baseline Synthetic Aperture Radar (SAR) for studying the remote sensing of natural scenarios, such as forest structure characterization and land subsidence monitoring. In the case of forested areas, tropical forest structure parameters are derived by Tomography SAR (TomoSAR) technique. For urban areas, Land subsidence is investigated through Interferometry SAR (InSAR) techniques. TomoSAR and InSAR will be treated by using Multi-baseline SAR images over different sites. Prior to tomographic analysis, a phase calibration algorithm is needed to compensate for phase residuals that corrupt the data and influence the focusing of Multi-baseline data. First, a tomographic study has carried out in tropical forest, where the forest characterization was assessed by using SAR tomography at L and P-band. Second, different InSAR techniques have been compared with respect to their performance in monitoring earth’s surface deformation, taking Lebanon as a case study.The first part of the thesis presents the TomoSAR analysis in the tropical forest. A review of phase calibration techniques employed on TomoSAR data is shown. The problem formulation starts with the phase calibration of the data stack that is considered as the main gate to begin with SAR processing algorithms. Thus, the main phase calibration algorithms proposed in the literature are discussed. Two of the most important phase calibration approaches are then described and discussed in detail. The potential of L-band TomoSAR data to characterize tropical forest structure is evaluated. The challenge here is the short wavelength of L-band data, and whether can penetrate tropical forests down to the ground. Tomographic analysis is carried out using L-band UAVSAR data from the AfriSAR campaign conducted over Gabon Lopé Park in February 2016. It was found that L-band TomoSAR was able to penetrate into and through the canopy down to the ground, and thus the canopy and ground layers were detected correctly. Then, monitoring tropical forest structure using SAR tomography at L- and P-band are treated. For this, a comparison of the P- and L-band TomoSAR profiles, Land Vegetation and Ice Sensor (LVIS), and discrete return LiDAR is provided in order to assess the ability for TomoSAR to monitoring and estimating the tropical forest structure parameters for enhanced forest management and to support biomass missions. The L- and P-band's performances for canopy penetration are assessed to determine the underlying ground locations. Additionally, the 3D records for each configuration are compared regarding their ability to derive forest vertical structure.The second part of the thesis tackle the utilization of InSAR techniques in land subsidence monitoring. The idea is to split the estimation of earth's surface deformations into two steps. The first step is to use Maximum Likelihood technique to jointly process Permanent scaterrers and Distributed scaterrers in order to yield the best estimates of interferometric phases. Then, the second step is to separate the contributions to the interferometric phases due to the scene topography and deformation field from those caused by decorrelation noise and atmospheric disturbances. As a case study, an extensive InSAR analysis of Lebanon site is shown, relying on a data-set of 117 Sentinel-1 satellite data acquired over Lebanon between 2015 and 2019, with high temporal resolution (i.e. 6 days)
Lyons, Suzanne N. "Investigations of fault creep in Southern California using interferometric synthetic aperture radar and GPS /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2002. http://wwwlib.umi.com/cr/ucsd/fullcit?p3071008.
Full textKatzenstein, Kurt W. "Mechanics of InSAR-identified bedrock subsidence associated with mine-dewatering in north-central Nevada /." abstract and full text PDF (UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3316378.
Full text"August, 2008." Includes bibliographical references (leaves 140-147). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2008]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web. Library also has electronic version on CD-ROM
Kamaruddin, Mohammad Halmi. "The potential of interferometric synthetic aperture radar digital surface models for mapping forest vertical structure." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416309.
Full textBaffoe-Twum, Edmund. "Using InSAR and hydrostratigraphic-simulation to determine land subsidence due to ground water withdrawal in the Pumpernickel Valley- Kelly Creek Basin, north central Nevada." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1446457.
Full textOsmanoglu, Batuhan. "Applications and Development of New Algorithms for Displacement Analysis Using InSAR Time Series." Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/622.
Full textMartone, Michele [Verfasser], and A. [Akademischer Betreuer] Moreira. "Onboard Quantization for Interferometric and Multichannel Synthetic Aperture Radar (SAR) Systems / Michele Martone ; Betreuer: A. Moreira." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1202076793/34.
Full textZhao, Zhiyuan. "Surface velocities of the East Antarctic Ice Streams from radarsat-1 interferometric synthetic aperture radar data /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488205318511395.
Full textDubois, Clémence [Verfasser], and S. [Akademischer Betreuer] Hinz. "Interferometric Synthetic Aperture RADAR and Radargrammetry towards the Categorization of Building Changes / Clémence Dubois. Betreuer: S. Hinz." Karlsruhe : KIT-Bibliothek, 2015. http://d-nb.info/1081722223/34.
Full textDe, Grandi Elsa Carla. "Spatial and temporal statistics of SAR and InSAR observations for providing indicators of tropical forest structural changes due to forest disturbance." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/29511.
Full textMuirhead, Fiona. "Exploiting sparsity for persistent scatterer detection to aid X-band airborne SAR tomography." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28880.
Full textYang, Qian. "Applications of Satellite Geodesy in Environmental and Climate Change." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6440.
Full textMASTRO, PIETRO. "Innovative Techniques for the Retrieval of Earth’s Surface and Atmosphere Geophysical Parameters: Spaceborne Infrared/Microwave Combined Analyses." Doctoral thesis, Università degli studi della Basilicata, 2023. https://hdl.handle.net/11563/162986.
Full textKpre, Ettien lazare. "Contribution à l’étude de techniques de codage analogique pour l’imagerie microonde active et passive." Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0060/document.
Full textMicrowave imaging systems are currently attracting great attention in the field of research, especially for security applications (body scanners, vision through walls, etc.). Several acquisition techniques already exist to optimize the antenna aperture in order to guarantee a good resolution on the final image. However, the current lock of imaging systems is to be able to achieve a real-time acquisition and address numerous antennas. Most of the current systems struggle to reconcile fast imaging and resolution while ensuring good sensitivity. The work carried out in this manuscript aims at proposing an alternative to the existing systems based on analog coding techniques of the antenna signals. Overall, the goal is to minimize the number of receivers without affecting performances. The proposed architectures are based essentially on the concept of the MIMO radar (for active systems) and the Synthetic Aperture Interferometric Radiometer or SAIR (for passive systems). These two systems allow a significant reduction of the number of antennas without affecting the resolution of the image, thus enabling a first lifting of constraints. In addition, passive compressive components are used to reduce the number of receivers in the MIMO Radar and the SAIR systems. These components with spatial and frequency diversity exhibit orthogonal transfer functions. Used in transmission, they allow simultaneous and independent addressing of each element of the antenna array. In reception, they allow the signals received by the antennas to be coded into a considerably reduced number of aggregate waveforms. By applying suitable decoding techniques, the signals received by each antenna can be estimated in order to apply imaging algorithms. These components offer the advantage of greatly reducing the number of RF channels while keeping the same number of antennas and allowing simultaneous acquisition of the signals. Laboratory demonstrators were carried out in S-band to demonstrate the feasibility of the proposed alternatives. Finally, the results obtained were the subject of a patent application and a prototype of a millimeter-wave radiometric imager is being developed in the framework of the ANR-PIXEL project
Becek, Kazimierz. "Biomass Representation in Synthetic Aperture Radar Interferometry Data Sets." Doctoral thesis, 2009. https://tud.qucosa.de/id/qucosa%3A25435.
Full text"Tianjin suburbs subsidence monitoring with L- and X-band multi-temporal InSAR data." 2013. http://library.cuhk.edu.hk/record=b5549824.
Full text工作在X波段(波長為3.1cm)的TerraSAR (TSX)衛星可以提供新一代具有高解析度(1米)和短重放週期(11天)的SAR資料,從而能夠更快的獲取適用於干涉的時間序列的資料,並且適用於單個建築物的沉降觀測。然而,利用X-波段在森林或植被覆蓋區域並不能得到有效資訊。ALOS衛星的SAR感測器工作在L波段,由於波長更長(波長為23cm),穿透力更強,所以在植被覆蓋區域也具有良好的相干性。但是ALOS衛星的SAR資料解析度更低(7米),重放週期更長(46天)。從這兩個波段的資料特徵來看,他們可以被認為是互補的。所以,結合這兩個波段的資料可以增強沉降監測的能力和提供更為可靠的結果。儘管ALOS衛星於2011年4月22日停止了工作,我們的研究結果仍然可以為結合不同波段的SAR資料進行沉降監測提供普遍適用的結論,並為以後的研究工作提供參考。
在研究中,我們提出了結合L和X波段的InSAR時間序列分析策略。此策略不僅可以作為X波段資料最優化獲取方案,而且可以成為快速,高精度,低成本,多級,大範圍監測策略。
其次,我們基於多時序SAR資料,利用PS和准PS(Quasi-PS, QPS)技術進行了L波段與X波段的沉降監測能力探尋。L波段和X波段的時間序列分析所得到的沉降模式有很好的吻合性,都監測出三個主要的沉降中心,其中包括一個新近發現的沉降中心位於南河鎮。
X波段的PS分析結果顯示出高密度的PS點,證實了它可以用於同時監測星狀分佈的多個城鎮。結果也表明了高解析度TSX資料可以監測到線狀地物如鐵路,高速公路以及電力線的細節資訊和沉降資訊,這些可以成為高解析度PS技術在中國的重要應用。
除此之外,我們利用水準資料驗證了L和X波段的處理結果,並且對地面沉降的過程進行了研究。由於水準資料和PS監測結果在時間和空間維上的採樣差別很大,所以我們對這兩者比較所具有的不確定性進行了詳細分析。結果表明了這兩種監測資料具有很好的一致性。
最後,我們發現在天津抽取地下水是引起地面沉降的一個主要原因。根據PS結果和地質資料,我們發現地質因素可能是另一個用於解釋沉降中心位置和形狀的原因。
The aim of this dissertation is to enhance the capability of monitoring subsidence in Tianjin suburbs by combining L- and X-band Synthetic Aperture Radar (SAR) data with Interferometry (InSAR) time series analysis. Tianjin is located in one of the major subsidence regions in China and several new subsiding centers have been found in the suburbs of Tianjin. Advanced remote sensing technique, Permanent Scatterers (PS) based on SAR data has been found to be a feasible way to detect and monitor wide area ground subsidence at a low cost.
TerraSAR X-band (TSX) of short wavelength (3.1 cm) provides new generation SAR data with high spatial resolution of 1 m and short revisit period of 11 days. It maintains the capability to fast build up interferometric stack, and to measure the subsidence of individual features, while almost no information can be detected with X-band in the forested and vegetated areas. ALOS L-band signal of longer wavelength (23cm) penetrates deeper into the vegetation cover and depicts higher coherence over non-urban areas, while the spatial resolution is relatively lower (7m) and revisit time is longer (46 days). The characteristics of these two bands can be regarded as complementary. Combining L- and X-band can enhance abilities of subsidence monitoring and provide more reliable results. Although ALOS died on April 22, 2011, this research work will provide general answers for combining different bands of SAR data to monitor subsidence, and give suggestions for future research work.
In this research work, we have developed the strategy of combining L- and X-band with InSAR time series analysis. This strategy can not only be an optimized X-band acquisition plan, but also be a multi-level wide area monitoring strategy of subsidence with fast extraction, high precision and low cost.
Moreover, with multi-temporal SAR data, we also investigate monitoring abilities of L- and X-band by exploring PS and Quasi-PS (QPS) techniques. The subsidence patterns derived from L- and X-band InSAR time series analysis are observed to have a good agreement. Three severe land subsidence zones were detected, containing one newly discovered subsiding center located in Nanhe Town.
The X-band PS analysis shows high density of PS points and confirms its strong ability for simultaneously monitoring subsidence over star-like-distributed multiple towns. The results also demonstrate that linear constructions such as railways, highways and power lines can be detected in detail with high resolution TSX SAR data and indicates the deformation monitoring capability for large-scale man-made linear features which is a key application in China.
Furthermore, L- and X-band results were independently validated with leveling data and ground motion processes were studied. The uncertainties were comprehensively analyzed between PS results and ground leveling data, whose densities are very different in both spatial and temporal domains. The overall results show a good agreement with each other.
Finally, we find that underground water extraction is one of the major reasons for ground subsidence in Tianjin. In addition, with the integrated analysis of the PS results and the geological data, we found that lithological characteristics may be another important reason to explain location and shape of the subsiding centers.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Luo, Qingli.
Thesis (Ph.D.)--Chinese University of Hong Kong, 2013.
Includes bibliographical references (leaves 103-112).
Abstract also in Chinese.
Abstract --- p.I
TABLE OF CONTENT --- p.VI
List of Figures --- p.VIII
List of Tables --- p.XI
List of abbreviations --- p.XII
ACKNOWLEDGEMENT --- p.XIV
Chapter 1 --- INTRODUCTION --- p.1
Chapter 1.1 --- Thesis contributions --- p.6
Chapter 1.2 --- Thesis structure --- p.7
Chapter 2 --- BACKGROUND --- p.9
Chapter 2.1 --- Synthetic Aperture Radar (SAR) --- p.9
Chapter 2.1.1 --- SAR imaging geometry --- p.9
Chapter 2.1.2 --- SAR satellites --- p.10
Chapter 2.2 --- Synthetic Aperture Radar Interferometry (InSAR) --- p.13
Chapter 2.2.1 --- Introduction --- p.13
Chapter 2.2.2 --- Principles of InSAR --- p.13
Chapter 2.3 --- Differential Synthetic Aperture Radar Interferometry (D-InSAR) --- p.18
Chapter 2.3.1 --- D-InSAR principle --- p.18
Chapter 2.3.2 --- The advantages and Limits of interferometric measurements --- p.21
Chapter 2.4.3 --- The development of PS technique --- p.22
Chapter 2.4 --- Persistent Scatterers Interferometry (PSI) --- p.24
Chapter 2.4.1 --- Permanent Scatterers (PS) Technique and Advantages --- p.24
Chapter 2.4.2 --- Principle of PS technique --- p.26
Chapter 2.5 --- QPS (Quasi-PS) Interferometry --- p.28
Chapter 3 --- MULTI IMAGES INSAR ANALYSIS OF TIANJIN --- p.31
Chapter 3.1 --- Introduction --- p.32
Chapter 3.2 --- Study area and SAR data --- p.34
Chapter 3.3 --- X-band optimized acquisition planning combing with L-band --- p.38
Chapter 3.3.1 --- The strategy --- p.38
Chapter 3.3.2 --- Experimental results and analyzes --- p.40
Chapter 3.4 --- Estimating deformation maps with L- and X-band --- p.45
Chapter 3.4.1 --- Monitoring subsidence over multiple towns and large man-made linear features with X-band --- p.45
Chapter 3.4.2 --- The L-band QPS Results --- p.56
Chapter 3.5 --- Conclusions --- p.58
Chapter 4 --- VALIDATION AND INTERPRETAION --- p.61
Chapter 4.1 --- Introduction --- p.61
Chapter 4.2 --- Validation --- p.61
Chapter 4.2.1 --- Leveling data --- p.61
Chapter 4.2.2 --- Uncertainties analysis --- p.64
Chapter 4.2.3 --- Average velocity comparison --- p.66
Chapter 4.2.4 --- Annual displacement comparison --- p.68
Chapter 4.2.5 --- Deformation time series: InSAR results and leveling --- p.70
Chapter 4.2.6 --- Average velocity map comparison between InSAR results and leveling --- p.71
Chapter 4.2.7 --- Displacement comparison between InSAR results and GNSS data --- p.73
Chapter 4.2.8 --- Average velocity comparison between ALOS results and leveling --- p.73
Chapter 4.3 --- Geological Interpretation --- p.74
Chapter 4.4 --- Field survey --- p.77
Chapter 4.5 --- QPS points analysis with aerophotograph --- p.81
Chapter 4.6 --- Conclusions --- p.84
Chapter 5 --- VALIDATION ALONG RAILWAY --- p.87
Chapter 5.1 --- Introduction --- p.87
Chapter 5.2 --- Study area --- p.87
Chapter 5.3 --- The validation plan --- p.87
Chapter 5.4 --- Validation with leveling data --- p.89
Chapter 5.4.1 --- Leveling data --- p.89
Chapter 5.4.2 --- The average subsidence rate comparison --- p.91
Chapter 5.4.3 --- The displacement comparison --- p.95
Chapter 5.5 --- Conclusions --- p.97
Chapter 6 --- SUMMARY --- p.98
The Publications --- p.102
REFERENCES --- p.103
Liu, Yuan-Kai. "Ground Deformation Related to Caldera Collapse and Ring-Fault Activity." Thesis, 2018. http://hdl.handle.net/10754/627773.
Full textCheng, Sheng-Bing, and 鄭勝濱. "Interferometric Synthetic Aperture Radar -- Phase Unwrapping." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/42220406264455141240.
Full text國立交通大學
電機與控制工程學系
86
This thesis proposes some improvement in unwrapping method of weighted least -square(WLS) , which need huge memory size and calculating time . Discussion about the weightings and minimal processing window size will be hold. Besides genetic algorithm (GA) was proposed to fix the inconsistencies of image that was called "residues" in branch-cuts method,so that make whole terrain continuous, and phase unwrapping will easy to go . Three methods:WLS, GA and branch-cuts method using average algorithm to processing bad bits will be examined to make a comparison on simulated terrain . Finally , combine the good of each method and take it to unwrap the whole real terain .
Lin, Jeng-Bin, and 林正賓. "Interferometric Synthetic Aperture Radar Image Registration." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/11755068268685858525.
Full text國立交通大學
控制工程系
85
An extension to the basic concept of correlation detection as a means of INSARimage registration is developed. To achieve sub- pixel accuracy, analysis approaches with different interpolation methods in different terrain relief are proposed. Numerical results from the process of some selected tie points in the INSAR image are included and compared. Then an appropriate mapping function is generated for the whole INSAR image. A sub- pixel resampled image is acquired by using a bilinear interpolation. Finally, conclusions are given to the determination of suitable process method on certain terrain relief.
Stevens, David Robert. "Motion compensation for airborne interferometric synthetic aperture radar." Thesis, 1994. http://hdl.handle.net/2429/4990.
Full textLagoy, Dustin. "Time Domain SAR Processing with GPUs for Airborne Platforms." 2017. https://scholarworks.umass.edu/masters_theses_2/471.
Full textSilva, Sérgio Rui Barbosa Oliveira da. "Interferometric synthetic aperture sonar system supported by satellite." Doctoral thesis, 2009. http://hdl.handle.net/10216/58170.
Full textSilva, Sérgio Rui Barbosa Oliveira da. "Interferometric synthetic aperture sonar system supported by satellite." Tese, 2009. http://hdl.handle.net/10216/58170.
Full textTSAI, PO-AN, and 蔡博安. "Co-registration of Interferometric Synthetic Aperture Radar Digital Elevation Model Derived from Radar." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/54869751480029761963.
Full text國防大學理工學院
空間科學碩士班
104
Radar is an active system to survey the surface of the earth. It means that it can broadcast the signal by itself and receive the reflected One. Therefore, it can work in night in order to overlap the shortage of optical technology. Based on high frequency of radar having great penetration, it can detect the information of the surface of the earth without the effect of atmosphere. In our research, we focus on where without ground control points or is difficult to arrive to build the DEM combined interferometry and data fusion. There provides the images from ALOS satellite which was launched by Japan Aerospace Exploration Agency in our research. The images were captured in the region of Taipei from 2008 to 2011. By thses images, we can do the interferometry synthetic aperture radar technique to make the digital elevation model. Although the temporary baseline, perpendicular baseline, atmosphere cause error, the results are still improved from 17.85m, 51.94m, 27.2m to 9.98m, 15.8m, 12.26m. Including all the fact, the method is developed the precision of digital elevation model without ground control point and overcome the low quality of these images.
miccinesi, lapo. "Advanced Ground-Based Real and Synthetic aperture Radar." Doctoral thesis, 2020. http://hdl.handle.net/2158/1196928.
Full textFiorentini, Nicholas. "Intelligent solutions for supporting decision-making processes in road management: A general framework accounting for environment, road serviceability, and user’s safety." Doctoral thesis, 2022. http://hdl.handle.net/2158/1279821.
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