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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Preliminary Results of Temporal Deformation Analysis in Istanbul Using Multi-Temporal Insar with Sentinel-1 Sar Data
摘要： Multi-temporal differential synthetic aperture radar interferometry techniques are well-developed and beneficial tools for deformation analysis using remotely sensed images. The primary objective of the study is to investigate the capability and the performance of the new generation SAR system Sentinel-1 data to detect and monitor surface deformation. We combined open source tools of Sentinel Application Platform (SNAP) and Stanford Method for Persistent Scatterers (StaMPS) for data processing. The results highlight the recent surface displacement rates over the Istanbul city. The deformation rates reach up to approximately 8 mm/yr over a 4 year period.
关键词： Sentinel-1,Persistent Scatterer InSAR,Urban deformation monitoring,Differential InSAR
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - An Adaptive Multilooking Scheme for Multi-Temporal Insar Data
摘要： Multilooking is an effective speckle reduction tool for InSAR images. However, it has some limitations. Based on the De-specKS and NL-SAR algorithms, an adaptive multilooking scheme for multi-temporal InSAR data has been proposed in this paper. Simulated and real SAR datasets have been employed to evaluate the performance of this scheme. The results show that, by taking advantages of DespecKS and NL-SAR, the proposed scheme presents better detail preservation and speckle noise reduction performances comparing with these two advanced and classical multilooking algorithms.
关键词： Speckle noise reduction,multi-temporal InSAR data,NL-SAR,DespecKS,adaptive multi-looking
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - A Direct Method to Estimate Atmospheric Phase Delay for Insar with Global Atmospheric Models
摘要： Differential Interferometric Synthetic Aperture Radar (DIn-SAR), also known as Persistent Scatters Interferometry (PSI), has proved its unprecedented advantages of monitoring ground deformation on large scale with centimeter to millimeter precision in the last two decades. However, the reliability and accuracy are often contaminated with atmospheric artefacts caused by spatial and temporal variations of the atmosphere. Recent studies revealed atmospheric artefacts can be compensated with empirical models, GPS zenith path delay and numerical weather prediction models. In this paper, an improved methodology is proposed based on atmospheric reanalysis data to estimate atmospheric artefacts. With our approach, the realistic line of sight (LOS) path along satellite location and monitored points is considered, rather than the zenith path delay. The effectiveness of our method is validated over Tenerife island, Spain by using Sentinel 1 datasets.
关键词： InSAR,uncertainty,Meteorology data,APS,ECMWF,atmospheric artefacts,Sentinel 1
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Persistent Scatterer Statistics and Their Detection
摘要： InSAR time series analysis of deformation fields requires a set of single look complex (SLC) radar images whose pixels accurately represent the InSAR phase. In some surface cover environments, such as vegetated regions where plant growth produces echoes unrelated to the underlying surface, reliable phase estimates are difficult to identify. Persistent scattering (PS) methods sort for the most stable points in an image, so that the deformation estimates are as robust as possible. To date the often-used selection algorithms have not always fully incorporated knowledge of PS point distributions or how they vary by terrain type. Here we show estimates of the probability density functions (pdfs) for several types of surface cover and how the added information can be applied to use MAP rather than MLE estimation to improve selection, and also give insights to the radar scattering processes that give rise to PS pixels.
关键词： InSAR,PS Algorithms,Persistent scattering
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Innovative Exploitation of Long, Dense and Coherent Insar Sentinel-L Time Series forland Survey and Classification
摘要： During the last three years the European Space Agency (ESA) Sentinel-1 (S1) mission, gathered large collections of Synthetic Aperture Radar (SAR) data over the Earth’s surface. A wide variety of SAR applications have benefited from the use of large stacks of S1 products. Surface displacement monitoring, land cover mapping, crop monitoring or flood detection are successful examples that are being increasingly employed by both public administrations and/or private companies in order to improve the productivity of processes (mining or oil & gas sector) and to provide a rapid response in front of disaster risk management (earthquakes, floods, etc.). The features of S1 sensor, i.e, short revisiting time, wide area processing, high slant-range resolution, improved radiometric accuracy or the availability to work with dual polarimetric data, benefits the reliability of all these applications. In this paper the benefits of multi-temporal SAR applications based on DARES TECHNOLOGY experience using S1 sensor is presented over three classic SAR applications.
关键词： SAR,coherence,InSAR,time series,vegetation,classification,land-cover,Sentinel-1,mapping
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Bistatic Insar X-Band Statistical Characterization of Agricultural Fields with Tandem-X
摘要： The interferometric synthetic aperture radar (InSAR) dataset, used for the generation of the global TanDEM-X (TDX) DEM, includes multiple acquisitions with different parameters. It enables a big opportunity for scientific geo-applications, such as for land characterization, classification, and monitoring. One valuable information that can be de-rived from interferometric SAR data for land classification describes the presence/absence of vegetation. At X-band, volume scattering produces decorrelation, even in the presence of short vegetation. As TerraSAR-X and TanDEM-X satellites are still acquiring data, the exploitation of the signatures for specific or detailed vegetation is possible. In August 2016 a ground field campaign was conducted in the Bavaria region, while dedicated TanDEM-X data takes over the same area were commanded by using different acquisition geometries and configurations. The aim of this paper is to character-ize the interferometric signatures of agricultural areas from single-pass bistatic TDX acquisitions at 12 meters posting, using the on ground typification for classification purposes.
关键词： InSAR,SAR,vegetation,X-band,characterization,signature
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Floodplain DEM Extraction Based on Swot HR Insar Data
摘要： The upcoming Surface Water and Ocean Topography (SWOT) mission, projected for launch in 2021, will provide global measurements of water elevation for ocean and continental water bodies with unprecedented resolution and accuracy. This article describes how the variations in height and extent of continental water surfaces, as measured by SWOT’s principal instrument, the Ka-band Radar Interferometer (KaRIn), can be used to derive floodplain Digital Elevation Models (DEMs), in principle with sub-meter accuracy. The proposed method is based on InSAR processing, refined geolocation, and the so-called bath-tub ring approach. Preliminary results obtained on multi-temporal simulated SWOT data are presented.
关键词： InSAR,DEM,SWOT,floodplain
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Coseismic Surface Deformations of Global Large Earthquakes in 2014–2016 Detected by Alos-2 Insar
摘要： SAR interferograms were produced using ALOS-2 data to detect global coseismic deformations associated with large (magnitude ≥ 6) and shallow (depth ≤ 25 km) onshore earthquakes from August 2014 to December 2016. Substantially coherent interferograms were produced for all 30 targeted seismic events, even in tropical areas, where C-band Sentinel-1 interferometry is unreliable due to severe decorrelation. A high degree of coherence of the ALOS-2 InSAR also greatly helps to identify surface ruptures. In this study, surface ruptures were successfully identified in at least seven events. Moreover, left-looking observations of ALOS-2 enable the retrieval of three-dimensional coseismic deformations with high precision, including north-south components, although left-looking observations are conducted only in the onshore area of Japan. In the case of the 2016 central Tottori earthquake in Japan, a clear, four-quadrant, three-dimensional deformation pattern was retrieved, implying that almost pure sinistral slip occurred.
关键词： InSAR,surface rupture,coseismic deformation,ALOS-2
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - The “Urban Geomatics for Bulk Information Generation, Data Assessment and Technology Awareness” Project: Detection, Representation and Analysis of the Urban Scenario Changes
摘要： About 54% of world population nowadays lives in urban areas and this percentage is expected to increase up to 66% by 2050. Therefore, it is crucial to manage this social and cultural change by collecting, integrating and sharing reliable and open spatial information concerning the urban environments where we leave in. The present availability of huge archives of synthetic aperture radar (SAR) data collected since 1992 by ESA, in conjunction with the available Earth-Observation (EO) optical data, represents a unique possibility to derive valuable information for the understanding of the ongoing urban processes. In this framework, the three-year project financed by the Italian Ministry of Instruction, Research and University, entitled “URBAN GEOmatics for bulk information generation, data assessment and technology awareness” may play a role for the assessment and the development of new replicable methodologies for the study of soil consumption and mobility in urban zones. The paper aims to present some preliminary results achieved during the project, clarifying how the new emerging technologies for managing big EO data are proficient for the investigation of urban processes.
关键词： InSAR,Urban areas,soil consumption
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - First Analysis of C-Band Ecr Transponders for Insar Geodesy
摘要： Well-identifiable reference benchmarks are important in SAR interferometry to enable linking between different measurement techniques, or to enable datum connection between the local InSAR datum and Terrestrial Reference Systems. As corner reflectors for C-band are rather large, weather sensitive, and difficult to maintain over time frames of several years, active electronic transponders are an alternative. However, low cost transponders have not been on the market until recently. Here we report results from field tests of a new type of transponder. We show that the phase precision is in the order of an equivalent displacement of 0.5 mm, and that the RCS of the transponder is equivalent to a trihedral corner reflector with a leg length of 1.03 m.
关键词： SAR,corner reflector,radar transponder,InSAR
更新于2025-09-10 09:29:36