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

Cloud Removal of Optical Remote Sensing Imageries using SAR Data and Deep Learning 基于SAR数据和深度学习的光学遥感图像去云

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688535

Xiao Xiao, Yilong Lu

引用次数: 1

Faraday Rotation Estimation Based on PolSAR Data: A Denoising Technique 基于PolSAR数据的法拉第旋转估计:一种去噪技术

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688431

Xun Wang, Dong Li, Yunhua Zhang, Jiefang Yang, Xiaojin Shi, Liting Liang

引用次数: 0

Improved Contrast Optimization Autofocus Algorithm for Compensating Ionospheric Phase Dispersion Effect on Spaceborne P-Band Ultrawideband SAR 星载p波段超宽带SAR电离层相位色散补偿的改进对比度优化自动聚焦算法

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688405

Huguang Yao, Zhuo Li

引用次数: 1

Land Subsidence Monitoring by SBAS-InSAR Technique with the Conversion to Horizontal-Vertical Displacements in Semarang 基于SBAS-InSAR技术的三宝垄地表沉降监测及水平-垂直位移转换

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688411

Jumpei Takami

{"title":"Land Subsidence Monitoring by SBAS-InSAR Technique with the Conversion to Horizontal-Vertical Displacements in Semarang","authors":"Jumpei Takami","doi":"10.1109/APSAR52370.2021.9688411","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688411","url":null,"abstract":"The main factors of land subsidence are excessive pumping of groundwater for industry, agriculture, snow melting, cooling, pumping of natural gas, and mines’ tunnel excavation. The city of Semarang, the capital of Central Java province, is located on the northern coast of Java island in Indonesia. Land subsidence in this city has enormous potentials for many hazards threatening people and urban infrastructures, such as buildings, roads, or whatever necessary for livelihoods. To accurately measure the land subsidence in Semarang, time series analysis of Small Baseline Subset (SBAS) or Permanent/Persistent Scatterers (PS) and Distributed Scatterers (DS) InSAR analysis is essential. This study shows the recent land subsidence volume in Semarang city with the SBAS technique and compares it to historical InSAR analysis. We also conducted the 2.5-dimensional analysis to convert the satellite line-of-site (LOS) displacement into the horizontal and vertical direction to see if there are differences between ascending and descending data. The SBAS analysis result showed the displacement volume in a range of - 18.2cm subsided and +6.8cm uplifted. The displacement rate was estimated to be substantially constant over time without any apparent seasonal effect. There is no significant difference in the results between ascending and descending datasets. The 2.5-dimensional analysis identified the horizontal and vertical displacements that we corrected any noise and inclined directional values using incidence angle.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"97 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":"116040952","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

Approach for Range-Ambiguous Clutter Suppression in an AEW Radar System 预警雷达系统中距离模糊杂波抑制方法

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688359

Haotian Yang, Penghui Huang, Yongyan Sun, Guozhong Chen, Xin Lin, Xingzhao Liu

{"title":"Approach for Range-Ambiguous Clutter Suppression in an AEW Radar System","authors":"Haotian Yang, Penghui Huang, Yongyan Sun, Guozhong Chen, Xin Lin, Xingzhao Liu","doi":"10.1109/APSAR52370.2021.9688359","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688359","url":null,"abstract":"For an airborne early warning (AEW) radar, when the radar system implements the long-distance moving target surveillance and tracking tasks, the range ambiguity may easily occur due to the limited pulse repetition interval (PRI), which will significantly degrade the target output signal-to-clutter and noise ratio (SCNR) and thus decrease the target detection probability. In addition, the current clutter superimposed by ambiguous clutter components located in different regions will deteriorate the clutter stability, further worsening the multi-channel clutter cancellation performance since the independent identically distributed (IID) property of the clutter training samples has been destroyed. To deal with this issue, the range ambiguity clutter suppression in an AEW radar is considered in this paper. In the proposed algorithm, the multi-channel radar echo signal model with respect to the range-ambiguous clutter is established, and the ambiguous clutter influence is analyzed. Then, the azimuth phase coding (APC) technique is applied to separate the range-ambiguous clutter components in the Doppler domain, which codes every transmitted radar pulse via the appropriate waveform designment. The simulation processing results has been provided to confirm the effectiveness and feasible of the range-ambiguous clutter separation ability.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"5 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":"128695625","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

Design of FPGA Board for CP-SAR Image Processing System CP-SAR图像处理系统的FPGA板设计

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688557

Takumi Aoyama, K. Namba, J. Sumantyo

引用次数: 0

Design of Broadband X-Band Subarray Antenna with Hybrid-Sequential Rotation Fed for Airborne CP-SAR 机载CP-SAR宽带x波段混合序贯旋转馈源子阵列天线设计

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688346

C. E. Santosa, J. Sumantyo

{"title":"Design of Broadband X-Band Subarray Antenna with Hybrid-Sequential Rotation Fed for Airborne CP-SAR","authors":"C. E. Santosa, J. Sumantyo","doi":"10.1109/APSAR52370.2021.9688346","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688346","url":null,"abstract":"The design of a broadband circularly-polarized subarray antenna for airborne synthetic aperture radar is presented in this paper. The proposed antenna operates in X-band at the center frequency of 9.5 GHz with a bandwidth of 400 MHz. The subarray antenna employs 16 patches with 4×4 matrix formation and uniform patch separation of 0.7λs. The hybrid sequential rotation technique on the feeding network is proposed to obtain a wide axial-ratio bandwidth and a balanced radiation pattern. The proposed antenna consists of two stacked substrates with identical specifications. Generation of circular polarization wave applies a curved-truncation patch on the radiator patch printed on the top layer bottom substrate. Broadening impedance bandwidth and gain enhancement are improved by an additional parasitic patch with circle-slotted printed on the upper layer. A floating copper on the upper layer is also attempted to improve the gain. Simulation results achieve the impedance bandwidth of 3.533 GHz (37.2%), axial-ratio bandwidth of 3.436 GHz (36.17%), the gain of 19.16 dBic, and the antenna size of 107 mm x 107 mm. The half-power beam-width in both azimuth and range direction is 16.4° and 15.9° at the center frequency of 9.5 GHz.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"95 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":"126882010","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

Spatial resolution of complex-valued reservoir computing in aspect classification using InSAR data 利用InSAR数据进行面相分类的复杂油藏空间分辨率计算

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688400

Bungo Konishi, A. Hirose, R. Natsuaki

引用次数: 0

Deformation Monitoring of Large-Scale Rockfill Dam Applying Persistent Scatterer Interferometry (PSI) Using Sentinel-1 SAR Data 基于Sentinel-1 SAR数据的持续散射干涉法监测大型堆石坝变形

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9688461

Hidenori Abo, T. Osawa, Pinglan Ge, Akira Takahashi, Katsutoshi Yamagishi

{"title":"Deformation Monitoring of Large-Scale Rockfill Dam Applying Persistent Scatterer Interferometry (PSI) Using Sentinel-1 SAR Data","authors":"Hidenori Abo, T. Osawa, Pinglan Ge, Akira Takahashi, Katsutoshi Yamagishi","doi":"10.1109/APSAR52370.2021.9688461","DOIUrl":"https://doi.org/10.1109/APSAR52370.2021.9688461","url":null,"abstract":"The Persistent Scatterer Interferometry (PSI) analysis accurately estimates the change over time of only the PS points on the ground surfaces using the time variation of the phase change of pixels with a small amount of noise called Persistent Scatter (PS).The riprap on the external surface of a rockfill dam is well reflected by radar, and since many PS points can be obtained over the entire external surface of the dam, the amount of external deformation can be grasped in a planar manner. In this paper, the PSI analysis was conducted for six large-scale rockfill dams of TEPCO Renewable Power using the SAR (Synthetic Aperture Radar) data from Sentinel-1 C-band, with 22 to 32 scenes of southbound and northbound trajectories in FY2020, respectively. The external displacement of the rockfill dams was measured using the SAR data. As a result of comparing the results of PSI analysis with the external deformations measured by surveying, it is concluded that the results of PSI analysis could be used to evaluate the deformation of the rockfill dam for maintenance management.","PeriodicalId":104561,"journal":{"name":"2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"109 3 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":"117317710","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 status of MetaSensing StarSAR-X: a multi-mode high-resolution spaceborne X-band SAR payload 多模高分辨率星载x波段SAR载荷metassensing StarSAR-X研制现状

2021 7th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2021-11-01 DOI: 10.1109/APSAR52370.2021.9687832

A. Meta, S. Placidi, M. Azcueta, Gerard Masalias

引用次数: 0