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2022 3rd China International SAR Symposium (CISS)最新文献

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Dynamic Analysis and Optimization of Deployment Mechanism of Long-baseline Millimeter-wave Antenna 长基线毫米波天线展开机理的动态分析与优化
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971435
Li Ji, Yingnan Yuan, Zhongyu Wang, Dong Yang, Zhihang Chen, Hui Wang
{"title":"Dynamic Analysis and Optimization of Deployment Mechanism of Long-baseline Millimeter-wave Antenna","authors":"Li Ji, Yingnan Yuan, Zhongyu Wang, Dong Yang, Zhihang Chen, Hui Wang","doi":"10.1109/CISS57580.2022.9971435","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971435","url":null,"abstract":"The spaceborne millimeter wave SAR system has a high frequency band, which requires a high beam pointing stability when operating in orbit. The effect of space micro vibration on its beam direction is obvious. Therefore, in order to ensure the normal operation of the system in orbit, a higher support stiffness is required for the antenna deployment mechanism. In this paper, the spaceborne millimeter wave orbit crossing interference antenna was taken as the research object. According to the index requirements, the configuration design and on orbit dynamics analysis of the antenna in the folded and deployed state were carried out, and the weak components were identified. The first order natural frequency of the SAR antenna deployment configuration was taken as the target to optimize the design of each weak component, and the optimized antenna fundamental frequency reached 8.03Hz, meeting the requirements that the index was greater than 7Hz. The mass and retraction envelope of the optimized antenna mechanism were within the constraints of the satellite and the carrier. In addition, the dynamic simulation analysis of the optimized antenna structure was carried out. With the three-axis attitude angle of the satellite as the input condition, the mechanical center relative to the three-axis angle deviation of the orbital intersection interference antenna on both sides was analyzed. The results show that the error and beam stability meet the index requirements and do not affect the imaging quality of SAR antenna.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133917582","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
FDDphase: A Package For Statistical Analysis of the Phase from Polarimetric Data FDDphase:一个从偏振数据中统计分析相位的软件包
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971358
Joselito E. Araujo, A. Borba, A. Frery
{"title":"FDDphase: A Package For Statistical Analysis of the Phase from Polarimetric Data","authors":"Joselito E. Araujo, A. Borba, A. Frery","doi":"10.1109/CISS57580.2022.9971358","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971358","url":null,"abstract":"Polarimetric Synthetic Aperture Radar data provide a wealth of information. A complete single-frequency observation of this kind is a complex matrix with nine degrees of freedom: three intensities and three complex covariances. There are several ways of extracting valuable information from these observations, among them the use of statistical models. In particular, the difference between the phases of the complex covariances is important in interferometric applications. In this article we survey statistical models for this kind of circular data. We present both physically-derived and empirical distributions, we highlight their relationships and present estimators for their parameters in an unified manner. We present a package for the R platform for statistical analysis of phase data under univariate physical and empirical models, their estimators, and their relationships.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"57 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133120071","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
In-Orbit Calibration Method of Beam Pointing Consistency for Distributed InSAR Satellites 分布式InSAR卫星波束指向一致性在轨标定方法
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971195
Di Zhao, Yuchuan Xu, Xuezhen Wang, Yusheng Hou, Nan Li, Junli Chen
{"title":"In-Orbit Calibration Method of Beam Pointing Consistency for Distributed InSAR Satellites","authors":"Di Zhao, Yuchuan Xu, Xuezhen Wang, Yusheng Hou, Nan Li, Junli Chen","doi":"10.1109/CISS57580.2022.9971195","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971195","url":null,"abstract":"In this paper, an in-Orbit calibration method of satellite beam pointing consistency of distributed interferometric synthetic aperture radar (InSAR) is proposed, which can be used in the design of distributed InSAR binary SAR system. During the in-orbit operation of distributed InSAR satellites, due to the inconsistency of dual satellite SAR beam direction and transceiver status, the working temperature environment of dual satellite SAR is inconsistent, resulting in the deviation of dual satellite SAR beam direction and the decrease of slave satellite receiving power, which leads to the problem of poor coherence of dual spaceborne SAR echo data. The implementation of this method is divided into two parts: \"rough adjustment\" and \"fine adjustment\". It can calibrate the beam pointing consistency of distributed InSAR satellites in orbit, effectively improve the coherence of dual images, and thus improve the mapping quality/accuracy of satellite system.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115622055","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
Analysis for the effect of wavefront aberrations on the performance of distributed SAR microwave photonic link 波前像差对分布式SAR微波光子链路性能的影响分析
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971359
Yulong Fu, Hui Wang, Zhiqiang Sun, Sili Wu, Zhongyu Wang, Shichao Zheng
{"title":"Analysis for the effect of wavefront aberrations on the performance of distributed SAR microwave photonic link","authors":"Yulong Fu, Hui Wang, Zhiqiang Sun, Sili Wu, Zhongyu Wang, Shichao Zheng","doi":"10.1109/CISS57580.2022.9971359","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971359","url":null,"abstract":"Microwave photonic relay technology is one of the effective methods to solve the phase synchronization problem of distributed synthetic aperture radar (SAR) system, and has received extensive attention. In this paper, the influence of wavefront aberrations on the performance of the microwave photonic link is investigated. It is shown that the spurious-free dynamic range performance depends on the normalized radius and the normalized center distance. This work will contribute to the design of distributed SAR microwave photonic system.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115706489","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
Research on compression method of yolov5 model based on channel pruning 基于信道剪枝的yolov5模型压缩方法研究
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971442
Bi Yuxuan, Yang Rui, Xiaoman Zhang, Li Yujia, Gu Yuehan
{"title":"Research on compression method of yolov5 model based on channel pruning","authors":"Bi Yuxuan, Yang Rui, Xiaoman Zhang, Li Yujia, Gu Yuehan","doi":"10.1109/CISS57580.2022.9971442","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971442","url":null,"abstract":"With the development of high-resolution and wide -format SAR satellites, on-board real-time processing of massive data has become a major development trend. However, due to the limitation of on-board resources, on-board real-time processing is faced with insufficient storage space, insufficient operating memory, and a large amount of computation. In order to solve this problem, this paper conducts channel pruning for the large target detection model yolov5 to achieve model compression, uses the bn layer as the basis for pruning, and adaptively determines the pruning ratio of each layer on the basis of analyzing the pruning sensitivity. We experimentally determine the best retraining strategy. In the end, this paper obtained the yolov5 lightweight network model with 5 configurations, the parameter reduction range is 74%-93%, the computation volume reduction range is 49.4%-89.6%, and the Map floats -3.6%-0.6% compared with before pruning. It is proved that the pruning scheme proposed in this paper has both large compression ratio, high precision and flexibility, and has important reference significance for the real-time target detection task on board.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117165939","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
Error Analysis of the Two-pass Approach in Spaceborne D-InSAR 星载D-InSAR两遍方法误差分析
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971311
Jinyi Zhang, Shichao Zheng, Yeke Tang, Sili Wu, Zhihang Chen, Hui Wang
{"title":"Error Analysis of the Two-pass Approach in Spaceborne D-InSAR","authors":"Jinyi Zhang, Shichao Zheng, Yeke Tang, Sili Wu, Zhihang Chen, Hui Wang","doi":"10.1109/CISS57580.2022.9971311","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971311","url":null,"abstract":"Spaceborne differential interferometry is a potential deformation monitoring technology. Error analysis is very important for the application and enhancement of this technology. In this paper, various errors are decomposed and classified according to the principle of mutual independence, and finally an error transfer model is established. On this basis, the interferometric phase error is decomposed in detail, which improves the problem that the predecessors did not fully consider the processing error when analyzing the phase error.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123319006","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 C-band Pulse Power Amplifier for Radar Transmitter 用于雷达发射机的c波段脉冲功率放大器
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971268
Zhongyu Hu, Qi Qiao, Junwei Shi, Ziqi Shao, Xiaokun Bai, Yafei Shen
{"title":"A C-band Pulse Power Amplifier for Radar Transmitter","authors":"Zhongyu Hu, Qi Qiao, Junwei Shi, Ziqi Shao, Xiaokun Bai, Yafei Shen","doi":"10.1109/CISS57580.2022.9971268","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971268","url":null,"abstract":"As an important part of transmitter in radar system, the power amplifier is used to amplify the low power input RF signals. In this paper, a C-band power amplifier with an output power of 40dBm and a bandwidth of 640MHz is presented. The power amplifier is mainly composed of RF part and power-supply module. In order to meet the output power requirements, a two-stage cascaded structure by GaAs transistors is adopted. The overall size of the designed power amplifier is about 175mm$times120mmtimes$24mm and the power consumption is less than 17W (20% duty cycle). Measurement results show that the product possesses good performance which can meet the technical requirements well.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124459703","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
An Improved SAR Image Speckle Reduction Algorithm Based on 3D Block Matching 一种改进的基于三维块匹配的SAR图像散斑消减算法
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971213
Yongqi Wang, Hui Wang, Yuxuan Bie
{"title":"An Improved SAR Image Speckle Reduction Algorithm Based on 3D Block Matching","authors":"Yongqi Wang, Hui Wang, Yuxuan Bie","doi":"10.1109/CISS57580.2022.9971213","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971213","url":null,"abstract":"For any Synthetic Aperture Radar (SAR) system, obtaining high-quality images is always a prerequisite for improving the performance of SAR applications. However, since the coherent imaging mechanism is affected by speckle noise, speckle suppression is required for SAR images. Aiming at the problem of block matching (BM3D) algorithm in SAR image denoising due to the problem of block matching grouping errors, this paper uses the structural similarity index to improve the block similarity measure, and when similar blocks are selected, according to the standard normal The distribution principle is used to select the threshold value of similar blocks. Compared with several other non-local mean filtering algorithms, the experimental results show that the proposed algorithm can not only effectively suppress the speckle noise in SAR images, but also maintain certain edge information details and obtain a good denoising effect.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123661889","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
Application and Verification of ultra-high Rate Battery Packs for Micro-nano SAR Satellites 微纳SAR卫星超高倍率电池组的应用与验证
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971322
Jin Yang, Xu-wang Hou, Naiming Chen, Juan Tian, Hai-jin Chen, Yiming Zhang
{"title":"Application and Verification of ultra-high Rate Battery Packs for Micro-nano SAR Satellites","authors":"Jin Yang, Xu-wang Hou, Naiming Chen, Juan Tian, Hai-jin Chen, Yiming Zhang","doi":"10.1109/CISS57580.2022.9971322","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971322","url":null,"abstract":"Driven by the restrictions of Low-cost, high load ratio and the multi-functional developments of SAR load, customers proposed higher requirements for light and miniaturized energy storage packs with high power characteristics. This paper introduces a light-weight and ultra-high power lithium-ion battery pack suitable for micro-nano SAR satellites, Which integrates an ultra-high-power battery module and a power charger. This battery pack can support continuous high power supply of 20C/minutes-discharge, besides automatically shutdown and unlock for power charge functions, which have been demonstrated successfully onboard for some certain small SAR satellites.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129804279","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
An Improved Multi-model Particle Filter Track-Before-Detect Algorithm 一种改进的多模型粒子滤波检测前跟踪算法
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971280
Xiaoyan Ma, Dan-hua Lao, Peng Liu, Yiwei Lv, Yifan Guo, Z. Feng
{"title":"An Improved Multi-model Particle Filter Track-Before-Detect Algorithm","authors":"Xiaoyan Ma, Dan-hua Lao, Peng Liu, Yiwei Lv, Yifan Guo, Z. Feng","doi":"10.1109/CISS57580.2022.9971280","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971280","url":null,"abstract":"In the field of weak target detection and tracking, when the target maneuvers, the detection capability of the traditional Multiple-Model (MM) Particle Filter (PF) Track-Before-Detect (TBD) algorithm decreases and the calculation amount of the algorithm increases. In this paper, an improved MM-PF-TBD algorithm is proposed. By adding the Constant Acceleration (CA) model, the Coordinate Turn (CT) model with variable turning rate and the Quasi-Monte Carlo (QMC) method, the improved algorithm could achieve the detection and tracking of weak maneuvering targets. Simulation results show that the detection capacity of the improved algorithm is 15% higher than that of the traditional algorithm, and the improved algorithm has more stable performance in low Signal-to-Noise Ratio (SNR) environment.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129587219","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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