- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 China International SAR Symposium (CISS) - Shanghai (2018.10.10-2018.10.12)] 2018 China International SAR Symposium (CISS) - Design of Compact Ka Band Antenna System for an InSAR Demonstrator
摘要： a compact and low profile Ka band antenna system designed for a demonstrator in InSAR application is presented in this paper. The system mainly contains 3 modules: the antenna array, the Rx component and the calibration network. The cross-track antenna contains 2 panel arrays and each has a dimension of 454×49.8mm2, while the along-track antenna contains 8 panel arrays and each has a dimension of 227.4×22.4mm2. All the arrays are fixed beam antennas and each will be connected with an Rx component to form a total of 10 active channels. The antennas adopt narrow side waveguide slot antenna as radiating element, and each panel array are composed by a number of smaller linear antenna sub-arrays whose sizes are optimized to have a high realized gains. The connection between antenna array and Rx component is realized by waveguide directly instead of using lossy SMP connector, and the Rx component can be attached at the back of the panel array tightly to improve the integration. The inner calibration network is integrated at the back of the antenna together with its feed network. The whole system as a demonstrator has a compact structure and can be expanded large scale system to meet the urgent conveniently to requirements of high performance antenna system in future InSAR application.
关键词： Ka band,InSAR,antenna system,multi-channel
更新于2025-09-23 15:22:29
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[IEEE 2018 China International SAR Symposium (CISS) - Shanghai (2018.10.10-2018.10.12)] 2018 China International SAR Symposium (CISS) - A Phase Reconstruction Method for Ground-Based Interferometric SAR
摘要： Ground-based interferometric SAR (GB-InSAR) technology is becoming an important terrain mapping technology as it has the characteristics of short observation interval, flexible operation environment and high data precision. Compared with the other air borne/space borne InSAR system, the GB-InSAR system has different image resolution, observation geometry and observation range. Thus, based on those features above, the interferometric phase of GB-InSAR has its own particularity. Mainly shows in the small offset between master and slave image, different decoherence sources, and the low-coherence area caused by varying viewing angle. This paper propose an interferometric phase processing method in order to recognize and compensate the low-coherence area based on their multi-characteristics, and rebuild the interferometric phase by using signal-domain estimation technology. This method will provide the satisfactory interferometric phase image for the following terrain map generation.
关键词： signal-domain phase reconstruction,recognize and compensate the low-coherence area,GB-InSAR,interferometric phase feature
更新于2025-09-23 15:22:29
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STUDI PENURUNAN MUKA TANAH (LAND SUBSIDENCE) MENGGUNAKAN METODE PERMANENT SCATTERER INTERFEROMETRIC SYNTHETIC APERTURE RADAR (PS-INSAR) DI KAWASAN KOTA CIMAHI - JAWA BARAT
摘要： Process or movement of land subsidence has a lot going on in various regions of the world especially in big cities. The impact of land subsidence can damage urban infrastructure and a disruption to the economic stability and social life in the region. Because of it, we need a natural disaster mitigation system that is able to provide rapid and optimal a geoscience analysis in the concept of quick assessment. A remote sensing technology has the ability to assess large areas in a short time and related with the typical climate of Indonesia that lies in a tropical area (intensity and extensive high cloud cover). Selection of radar technology is one solution that is good for spatial mapping in land subsidence estimation. PS-InSAR is the newest method in RADAR image satellite processing which is give a good accuracy and minimize decorellation effects. PS-InSAR method implementation in Indonesia area is a good solution because this method can penetrate heavy dense clouds and fogs. This method was used in land subsidence analysis at Cimahi City-West Java Province which is result arounds 17.97 mm/yr ± 11.5 mm/yr. The South Cimahi District has a highest land subsidence rate arounds 22.9 mm/yr ± 12,7 mm/yr. This method has been proven as one of a good remote sensing method to investigate land subsidence movement.
关键词： Remote Sensing,Land Subsidence,PS-InSAR,Radar,DInSAR
更新于2025-09-23 15:22:29
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Mapping Two-Dimensional Deformation Field Time-Series of Large Slope by Coupling DInSAR-SBAS with MAI-SBAS
摘要： Mapping deformation field time-series, including vertical and horizontal motions, is vital for landslide monitoring and slope safety assessment. However, the conventional differential synthetic aperture radar interferometry (DInSAR) technique can only detect the displacement component in the satellite-to-ground direction, i.e., line-of-sight (LOS) direction displacement. To overcome this constraint, a new method was developed to obtain the displacement field time series of a slope by coupling DInSAR based small baseline subset approach (DInSAR-SBAS) with multiple-aperture InSAR (MAI) based small baseline subset approach (MAI-SBAS). This novel method has been applied to a set of 11 observations from the phased array type L-band synthetic aperture radar (PALSAR) sensor onboard the advanced land observing satellite (ALOS), spanning from 2007 to 2011, of two large-scale north–south slopes of the largest Asian open-pit mine in the Northeast of China. The retrieved displacement time series showed that the proposed method can detect and measure the large displacements that occurred along the north–south direction, and the gradually changing two-dimensional displacement fields. Moreover, we verified this new method by comparing the displacement results to global positioning system (GPS) measurements.
关键词： synthetic aperture radar,deformation field time-series,open-pit slope,multiple-aperture InSAR,DInSAR
更新于2025-09-23 15:22:29
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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 - Surface Deformation Evaluation in Dujiangyan, China Using Time-Series InSAr Technique and Multiple Temporal C-Band SAR Datasets
摘要： The surface deformation of Dujiangyan, Sichuan, China was studied. Permanent Scatterer (PS) interferometric synthetic aperture radar (InSAR) technique was applied to 21 Envisat SAR datasets acquired from May of 2008 to July of 2010 and 61 Sentinel-1 SAR datasets acquired between October of 2014 and November of 2017. The Zipingpu Dam, located on the northwestern highland area of Dujiangyan had obvious subsidence in a 2-year period after the 2008 Wenchuan earthquake. The rate ranged from 0 to –30mm/year. The quake was attributed to the major cause. From 2014 to 2017, the dam was deformed less than 5mm/year. The dam was relatively stable. Since the recovering efforts were completed before 2014, the surface deformation in the urban areas of Dujiangyan was small between 2014 and 2017. The dominant rate was about 2 to –4mm/year.
关键词： Surface deformation,Permanent Scatterer InSAR technique,Dujiangyan,Zipingpu Dam
更新于2025-09-23 15:21:21
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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 Asymmetric Split-Spectrum Method for Estimating the Ionospheric Artifacts in Insar Data
摘要： The last two decades have witnessed a dramatic development of the satellite interferometric synthetic aperture radar (InSAR) technology in both the theoretical methods and operational platforms. The propagation errors of SAR signal in the ionosphere is one of the problematic issues for the low-frequency SAR systems, such as L-band and P-band, and can also seriously degrade the accuracy of InSAR. Recently, there has been renewed interest in the range split-spectrum method for the ionopheric correction after some critical issues are resolved. In this study, we used the ultra-fine observation mode (80 MHz) of the Advanced Land Observation Satellite-2 (ALOS-2) phased array-type L-band synthetic aperture radar-2 (PALSAR-2) data over the 2016 Kumamoto earthquake to evaluate the performance of an asymmetric split-spectrum method for the ionospheric correction. The presented works demonstrate the effectiveness of two types of the asymmetric split-spectrum method for mitigating the ionospheric artifact in InSAR, as compared with the conventional split-spectrum method. Additionally, this study provides practical insight into the ionospheric correction strategies of the scheduled NASA-ISRO synthetic aperture radar (NISAR) mission.
关键词： 2016 Kumamoto earthquake,ionospheric artifact correction,Interferometric synthetic aperture radar (InSAR),NISAR,ALOS-2 PALSAR-2
更新于2025-09-23 15:21:21
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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 - Insar Mission-Level Products on Demand - do we Need Range-Doppler?
摘要： InSAR time series analysis of deformation fields, a goal of many modern radar systems, almost always starts with processed range-Doppler single look complex (SLC) radar images. These images are precisely coregistered and pairwise phase differences form the interferograms. Computing coregistered SLCs directly in a desired geometry saves significant data storage and readily produces data products that are easy to analyze in coordinate systems that are well matched to a desired application. Here we demonstrate InSAR data products created using a backprojection algorithm that skips the range-Doppler, coregistration, and elevation compensation steps. Implementing this in an on-demand system saves not only on the volume of products that must be computed, stored, and delivered, it further greatly simplifies analysis by the end user and opens up InSAR techniques to a wider group of applications.
关键词： InSAR,Processing Algorithms,Data Products
更新于2025-09-23 15:21:21
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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 - Using Multi-Frequency Insar Data to Constrain Ground Deformation of Ischia Earthquake
摘要： In this study, multi-frequency Synthetic Aperture Radar Interferometry (InSAR) data are used to constrain the ground deformation due to the August 21st, 2017, Ischia earthquake. InSAR results are the input data to infer the source model of the seismic event. C-band Sentinel-1 and X-band COSMO-SkyMed? InSAR results show a displacement pattern in the epicentral area, with a maximum value of ~3.5 cm and a dominant vertical component. Preliminary analytical and numerical models suggest that the retrieved InSAR ground displacements are due to the combination of two phenomena: the tectonic dislocation caused by the slip on the fault plane and the surficial displacement caused by the triggering of shallow landslides.
关键词： InSAR,Ischia earthquake,Landslides,Deformations,Modeling
更新于2025-09-23 15:21:21
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Decision Fusion of D-InSAR and Pixel Offset Tracking for Coal Mining Deformation Monitoring
摘要： Ground surface subsidence is a universal phenomenon in coal mining areas which can cause serious damage to the surrounding environment. In this paper, we consider the use of differential interferometric synthetic aperture radar (D-InSAR), multi-temporal InSAR (MT-InSAR), and the pixel offset tracking technique to monitor the surface deformation of a coal mining area. In this study, we use the two-pass D-InSAR method to generate 19 interferometric image pairs from 20 TerraSAR-X SpotLight images. The results show that D-InSAR can be used to obtain high accuracy surface deformation in the mining areas where there is no high gradient deformation, and the pixel offset tracking method offers advantages in those areas where high gradient deformation is found, but its performance is not stable. This means that the unilateral use of these technologies cannot obtain reliable subsidence information in mining areas. Therefore, it is essential to ?nd a new way to integrate the respective advantages of these different methods. In this paper, a new fusion method combining the D-InSAR result with the offset tracking result based on a spatial decorrelation distribution map is proposed to obtain the subsidence results in a mining area. To ensure the reliability of the results, a decision rule is proposed for the spatial decorrelation distribution map, which is generated manually by union analysis in ArcGIS. In the experiments, the mean absolute error of the fusion result is 0.0748 m, while that of D-InSAR is 0.1890 m, and that of offset tracking is 0.1358 m. It is therefore clear that the proposed fusion method is more reliable and more accurate than the use of individual methods, and it may be able to serve as a reference in mining subsidence monitoring.
关键词： mining subsidence,offset tracking,MT-InSAR,D-InSAR,decision fusion
更新于2025-09-23 15:21:01
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Geodetic and Remote-Sensing Sensors for Dam Deformation Monitoring
摘要： the measurement of dam displacements has benefited from a great improvement of existing technology, which has allowed a higher degree of automation. This has led to data collection with an improved temporal and spatial resolution. Robotic total stations and GNSS (Global Navigation Satellite System) techniques, often in an integrated manner, may provide efficient solutions for measuring 3D displacements on precise locations on the outer surfaces of dams. On the other hand, remote-sensing techniques, such as terrestrial laser scanning, ground-based SAR (synthetic aperture radar) and satellite differential interferometric SAR offer the chance to extend the observed region to a large portion of a structure and its surrounding areas, integrating the information that is usually provided in a limited number of in-situ control points. The design and implementation of integrated monitoring systems have been revealed as a strategic solution to analyze different situations in a spatial and temporal context. Research devoted to the optimization of data processing tools has evolved with the aim of improving the accuracy and reliability of the measured deformations. The analysis of the observed data for the interpretation and prediction of dam deformations under external loads has been largely investigated on the basis of purely statistical or deterministic methods. The latter may integrate observation from geodetic, remote-sensing and geotechnical/structural sensors with mechanical models of the dam structure. In this paper, a review of the available technologies for dam deformation monitoring is provided, including those sensors that are already applied in routinary operations and some experimental solutions. The aim was to support people who are working in this field to have a complete view of existing solutions, as well as to understand future directions and trends.
关键词： deformation measurement,ground-based SAR,integrated monitoring systems,D-InSAR,dams,terrestrial laser scanning,GNSS
更新于2025-09-23 15:21:01