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2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)最新文献

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Forest Areas With A High Potential Risk Of Fire Mapping On Peatlands Using Interferometric Synthetic Aperture Radar 干涉法合成孔径雷达在泥炭地火灾高风险林区的测绘
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688492
J. Widodo, Hammam Riza, A. Herlambang, R. Arief, P. Razi, F. Kurniawan, Y. Izumi, D. Perissin, J. Sumantyo
{"title":"Forest Areas With A High Potential Risk Of Fire Mapping On Peatlands Using Interferometric Synthetic Aperture Radar","authors":"J. Widodo, Hammam Riza, A. Herlambang, R. Arief, P. Razi, F. Kurniawan, Y. Izumi, D. Perissin, J. Sumantyo","doi":"10.1109/APSAR52370.2021.9688492","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688492","url":null,"abstract":"Forest fires, especially on peatlands, constitute a significant problem that is often faced in Indonesia. Forest fires that occur on peatlands are caused because the peatlands have been degraded due to deforestation, with the aim of utilizing peatlands for forestry and agricultural cultivation activities. Efforts to mitigate forest fires on peatlands need to be made. The first thing to do is to map peatlands that have a high risk of burning. In order to cover a large area, remote sensing technology is needed. Peatlands that have subsided are identical to peatlands that are dry, so they burn easily. SAR interferometry has the ability to detect the subsidence of peatlands. Combined with the Wosten model, areas with a high potential risk of forest fire on peatland can be mapped, and this has been demonstrated in this research.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125552271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Development of X-band microstrip antenna for circularly polarized synthetic aperture radar onboard UAV 无人机上圆极化合成孔径雷达x波段微带天线研制
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688494
Hisato Kashihara, J. Sumantyo
{"title":"Development of X-band microstrip antenna for circularly polarized synthetic aperture radar onboard UAV","authors":"Hisato Kashihara, J. Sumantyo","doi":"10.1109/APSAR52370.2021.9688494","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688494","url":null,"abstract":"Recently, broadband antenna is needed to realize high resolution remote sensing images, especially synthetic aperture radar (SAR). In this research, we propose an array antenna that is the core of the X-band antenna for circularly polarized SAR (CP-SAR) onboard an unmanned aerial vehicle (UAV). The proposed antenna is designed in left-handed circularly polarized (LHCP) mode and is a compact, lightweight, low-profile microstrip antenna with printed wiring on a two-layer dielectric substrate. The dielectric substrate is a glass-fluoropolymer dielectric substrate with a thickness of 1.6 mm, a relative dielectric constant of 2.17, and a dielectric loss tangent of 0.0005. It enables high-resolution CP-SAR with a wide bandwidth of 800 MHz and a low axial ratio. For this purpose, the radiating surface of the unit element of the array antenna was designed as an ax-shaped shape with square slots. The band axial ratio was adjusted by an elliptical degenerate separation element. And the feeding method is a single proximity junction feeding to provide flexibility in the array wiring. The unit elements are arranged in two rows and two columns, and each element is fed radially from the center by a sequential rotating array. The proposed antenna was designed by simulation and fabricated by photo etching. The basic characteristics of the antenna were verified by experiments in an anechoic chamber. The design was carried out at a center frequency of 9.4 GHz with a bandwidth of 800 MHz. The unit element showed a gain of 7.9 dBic and an axial ratio of less than 3.0 dB in the simulation, while the prototype antenna showed a gain of 8.5 dBic and an axial ratio of less than 2.7 dB. For the array antenna, the simulated gain was 11.8 dBic and the axial ratio was less than 2.7 dB, and the prototype antenna had a gain of 11.6 dBic and the axial ratio was less than 1.5 dB. This antenna will be used in further study for ground test and flight test of UAV onboard SAR.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127596752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detection of Building Damage due to the 2016 Kumamoto Earthquake using Texture Combinations of Single Post-event Airborne SAR Data 基于单次事后机载SAR数据纹理组合的2016熊本地震建筑物损伤检测
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688416
B. Lapian, Wen Liu, F. Yamazaki, Y. Maruyama
{"title":"Detection of Building Damage due to the 2016 Kumamoto Earthquake using Texture Combinations of Single Post-event Airborne SAR Data","authors":"B. Lapian, Wen Liu, F. Yamazaki, Y. Maruyama","doi":"10.1109/APSAR52370.2021.9688416","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688416","url":null,"abstract":"This paper investigates the 2016 Kumamoto Earthquake to explore the use of post-event full polarimetric SAR images in building damage assessment. In this study, one post-event airborne SAR image of Pi-SAR-X2 was employed to detect the changes of residential buildings in Mashiki Town, Kumamoto Prefecture, Japan. The changes in scattering characteristics of collapsed and non-collapsed buildings were compared using variance, homogeneity, contrast and dissimilarity textures of the Grey Level Co-occurrence Matrix (GLCM) from building footprints and roof areas. In addition, due to the difficulty in detection using only one texture, combination of textures in different polarizations were also applied for damage detection. The results of this method were then compared with the field survey data. The result indicates the possibility of building damage assessment using only post-event data and solving the pre-event data limitation problem.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"53 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120853538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of an Airborne X-band APAA-SAR System 机载x波段APAA-SAR系统的研制
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688544
T. Hoshino, Hiroaki Fujihara, Hideki Hasegawa, Tasuku Kuriyama, Kenjirou Ura, T. Hamasaki
{"title":"Development of an Airborne X-band APAA-SAR System","authors":"T. Hoshino, Hiroaki Fujihara, Hideki Hasegawa, Tasuku Kuriyama, Kenjirou Ura, T. Hamasaki","doi":"10.1109/APSAR52370.2021.9688544","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688544","url":null,"abstract":"Synthetic aperture radar (SAR) is promising technique for high-resolution monitoring of the region of interests. We have already developed several SAR systems which based on L-band, Ku-band, X-band systems; however, these systems are without APAA because of its cost. In this time, we have developed airborne SAR system based on X-band active phased array antenna (APAA). The antenna subsystem is very small, furthermore, the electric unit which includes exciter/receiver/digital processor is also small. We have conducted a test flight at Nagoya city and demonstrated the effectiveness of the system.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125438483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Double-Layer Distributed Transmission and Processing Structure for Multi-Channel Aperture Synthesis Passive Imaging Systems 一种多通道孔径合成被动成像系统的双层分布式传输与处理结构
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688434
Yu Wang, Xinbao Gong, Gang Song
{"title":"A Double-Layer Distributed Transmission and Processing Structure for Multi-Channel Aperture Synthesis Passive Imaging Systems","authors":"Yu Wang, Xinbao Gong, Gang Song","doi":"10.1109/APSAR52370.2021.9688434","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688434","url":null,"abstract":"Aperture synthesis passive imaging system requires more input channels to achieve higher spatial resolution, leading to a square rate growth of connection between channels. To reduce the connection complexity in multi-channel aperture synthesis system, a novel double-layer distributed transmission and processing structure is proposed in this paper. The proposed structure is composed of fully-interconnected inner layers and ring-shaped outer layers, providing the ability for distributed computation and the scalability of the system. A data transmission method for the proposed structure is also presented to ensure that the correlation computation can be calculated in real time and without redundancy. The implementation of the proposed structure is analyzed, such as the uniform distribution of the calculation through the system, the tradeoff between the connection complexity and the transmission bandwidth, etc. The simulation results verify the effectiveness of the system and demonstrate that the proposed structure can tolerate high transmission delay and achieve good transmission utilization.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127720549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non-Line-Of-Sight Radar 3-D Imaging via Sparse Reconstruction 基于稀疏重建的非视距雷达三维成像
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688538
Xinyuan Liu, Shunjun Wei, Jinshan Wei, Zichen Zhou, Mou Wang, Jun Shi, Xiaoling Zhang
{"title":"Non-Line-Of-Sight Radar 3-D Imaging via Sparse Reconstruction","authors":"Xinyuan Liu, Shunjun Wei, Jinshan Wei, Zichen Zhou, Mou Wang, Jun Shi, Xiaoling Zhang","doi":"10.1109/APSAR52370.2021.9688538","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688538","url":null,"abstract":"Non-line of sight (NLOS) radar imaging is significantly promising in several environmental perceptions, such as urban environment perception and intelligent driving. However, the existing NLOS imaging radar mainly focuses on two-dimensional (2-D) imaging, which may suffer from information loss and geometric distortion of the real three-dimensional (3-D) underlying scene. In this paper, exploiting the scene sparsity and the specular scattering of the reflector, we proposed an NLOS 3-D radar imaging method based on Bayesian compressed sensing sparse reconstruction and mirror projection. In the scheme, the imaging model of NLOS radar with the geometric mirror scattering is first constructed. And then, the sparse Bayesian learning method is used to perform high-resolution imaging of the NLOS objects. In order to verify the technique, we set up a millimeter-wave multiple-input multiple-output (MIMO) array scanning system, and different types of metal balls and irregular targets are tested. The experimental results demonstrate that the presented 3-D NLOS imaging radar can obtain the near-field high-resolution 3-D imaging of the tested targets, and the effectiveness of the sparsity-driven algorithm is verified.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122459601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SAR Marginal Ice Zone Surface Roughness Visualization And Electromagnetic Interaction Investigation Based on Sea State Conditions 基于海况条件的SAR边缘冰区表面粗糙度可视化及电磁相互作用研究
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688337
I. H. Shahrezaei, Hyuncheol Kim
{"title":"SAR Marginal Ice Zone Surface Roughness Visualization And Electromagnetic Interaction Investigation Based on Sea State Conditions","authors":"I. H. Shahrezaei, Hyuncheol Kim","doi":"10.1109/APSAR52370.2021.9688337","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688337","url":null,"abstract":"In this paper, sea-ice surface roughness has been modeled by a numerical method based on statistical properties of marginal ice zone (MIZ) in terms of energy balance computation under the sea state condition. The proposed visualization was carried out by processing of JONSWAP directional spectral formulation. Meanwhile, backscattering effects of MIZ from synthetic aperture radar (SAR) point of view is investigated. The results show that sea states including the wind speed and wind direction have direct impacts on the surface roughness, so that they can alter the electromagnetic properties and texture characteristics. Despite the limitations of different synthesis techniques, such as computational burden, dimensionality, complex formulation, non-coherent backscattering, and other variables that are hard to assess due to difficult access to the polar region, the proposed approach reduces the reliance on approximate formulations and empirical instructions.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126985483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Interferometric SAR Processing using Whole ALOS/PALSAR Data Archive for Measuring the Global Surface Deformation 利用全ALOS/PALSAR数据档案进行干涉SAR处理，测量全球地表变形
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688342
Ryu Sugimoto, M. Shimada, Y. Morishita, R. Natsuaki, R. Nakamura, Chiaki Tsutsumi, Y. Yamaguchi
{"title":"Interferometric SAR Processing using Whole ALOS/PALSAR Data Archive for Measuring the Global Surface Deformation","authors":"Ryu Sugimoto, M. Shimada, Y. Morishita, R. Natsuaki, R. Nakamura, Chiaki Tsutsumi, Y. Yamaguchi","doi":"10.1109/APSAR52370.2021.9688342","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688342","url":null,"abstract":"In an area with the risk of natural disasters, sustainable monitoring of ground deformation is important. Space-borne Interferometric Synthetic Aperture Radar (InSAR) has been a key technology for global surface deformation monitoring. Japanese L-band SAR, ALOS/PALSAR acquired a huge amount of interferometric data during 2006-2011. To help to reveal the spatially detailed ground deformation on a continental scale, we have been producing interferograms using the full archive of the PALSAR data. So far, we have processed 450,000 interferograms in some primary regions of interest (i.e., the whole area of Japan, active fault regions of Southeast Asia and the Middle East). The derived interferograms can be used for the time series analysis to investigate the velocity or time series of the deformation with high accuracy. We are planning to make the products freely accessible through a website in the future.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127159003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Improved Computerized Ionospheric Tomography Based on the Spaceborne SAR, ionosonde and GPS data 基于星载SAR、电离层探空仪和GPS数据的改进电离层计算机层析成像
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688437
Cheng Wang, Haisheng Zhao, Wulong Guo, Bo Liu, Liang Chen
{"title":"Improved Computerized Ionospheric Tomography Based on the Spaceborne SAR, ionosonde and GPS data","authors":"Cheng Wang, Haisheng Zhao, Wulong Guo, Bo Liu, Liang Chen","doi":"10.1109/APSAR52370.2021.9688437","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688437","url":null,"abstract":"In order to improve the accuracy of computerized ionospheric tomography (CIT) based on the GPS, this paper presents a data fusion method. Due to the significant influence of initial value on CIT, a combination of data from ionosonde and the Advanced Land Observing Satellite (ALOS) Phased Array L-band Synthetic Aperture Radar (PALSAR) is adopted. A more precise electron density profile can then be obtained and used for new initial value. Simulation results in this paper show that compared with traditional method, the combination scheme in this paper can obviously improve the accuracy of the ionospheric reconstruction.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133508275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Pylon Detection Method Based on Faster R-CNN in High-Resolution SAR Images 基于更快R-CNN的高分辨率SAR图像塔架检测方法
2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688459
Lv Xiaoling, Jiankun Chen, Xiaolan Qiu
{"title":"A Pylon Detection Method Based on Faster R-CNN in High-Resolution SAR Images","authors":"Lv Xiaoling, Jiankun Chen, Xiaolan Qiu","doi":"10.1109/APSAR52370.2021.9688459","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688459","url":null,"abstract":"SyntheticAperture Radar (SAR) is an active microwave imaging system, which can provide all-time and allweather imaging with a wide observation range. In sub-meter high-resolution SAR images, man-made metallic targets, such as pylons, can be easily detected and their details can be obtained. Therefore, pylon detection using high-resolution SAR images has its unique advantages. To solve the problem that traditional pylon detection methods in SAR images require the manual design of feature extractors and perform poorly in terms of realtime requirements, an effective and fast framework for pylon detection in SAR images is proposed in this paper. It combines Faster R-CNN and sliding window algorithm to detect pylons in large-scene SAR images. Besides, it effectively improves detection accuracy by using data augmentation. The proposed method can detect up to 97.6% on the test set and 80% in largescene GF-3 SAR images. The average time cost of detection is 0. 06s for a slice image and 90s for a large-scale SAR image. Experiments demonstrate good performance in detection rate and instantaneity.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133100922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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