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Efficient Simulation of hybrid stripmap/spotlight SAR raw signals from extended scenes

G. Franceschetti, R. Guida, A. Iodice, D. Riccio, G. Ruello
2004 IEEE Transactions on Geoscience and Remote Sensing  
In this paper, time-and frequencydomain-based procedures to simulate the raw signal in the hybrid stripmap/spotlight mode are presented and compared.  ...  The hybrid stripmap/spotlight mode for a synthetic aperture radar (SAR) system is able to generate microwave images with an azimuth resolution better than the one achieved in the stripmap mode and a ground  ...  SIMULATION OF SAR RAW SIGNALS: HYBRID STRIPMAP/SPOTLIGHT MODE In this section, we move to consider the hybrid stripmap/spotlight mode: we first evaluate its transfer function and then present a raw signal  ... 
doi:10.1109/tgrs.2004.834763 fatcat:z2ujz2yk7neifhad7xnly265qq

Efficient hybrid stripmap/spotlight SAR raw signal simulation

Giorgio Franceschetti, Raffaella Guida, Antonio Iodice, Daniele Riccio, Giuseppe Ruello
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004  
In addition, to analyse the effects of processing errors and to verify the impact of different system design choices on the final image for different kinds of imaged scenes, an extended scene SAR raw signal  ...  Consequently, a hybrid SAR raw signal simulator is strongly required, especially when real raw data are not available yet, to test processing algorithms and to help mission planning.  ...  Hybrid SAR raw signals corresponding to extended canonical scenes have been also simulated.  ... 
doi:10.1109/igarss.2004.1370675 dblp:conf/igarss/FranceschettiGIRR04 fatcat:3kjhzfxkvnbp5oz4s7teur5vi4

EXTENDED WAVENUMBER DOMAIN ALGORITHM FOR HIGHLY SQUINTED SLIDING SPOTLIGHT SAR DATA PROCESSING

Deming Guo, Huaping Xu, Jingwen Li
2011 Electromagnetic Waves  
Point target simulation results are presented to validate the effectiveness of extended WDA to process highly squinted sliding spotlight SAR data.  ...  Image formation from squinted sliding spotlight synthetic aperture radar (SAR) is limited by azimuth spectral folding and severe two dimension coupling.  ...  In order to satisfy the demand that SAR systems possess the capability to image with high resolution and wide swath, an innovative sliding spotlight mode, originally called hybrid stripmap/spotlight mode  ... 
doi:10.2528/pier11012010 fatcat:3tgfvbxolratbdvq7mjrj5fmea

Accelerating Spaceborne SAR Imaging Using Multiple CPU/GPU Deep Collaborative Computing

Fan Zhang, Guojun Li, Wei Li, Wei Hu, Yuxin Hu
2016 Sensors  
Experimental results demonstrate that the deep CPU/GPU collaborative imaging method enhances the efficiency of SAR imaging on single-core CPU by 270 times and realizes the real-time imaging in that the  ...  imaging rate outperforms the raw data generation rate.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s16040494 pmid:27070606 pmcid:PMC4851008 fatcat:n4thstxfb5a7xaaj6wydp6ut54

Spotlight SAR data focusing based on a two-step processing approach

R. Lanari, M. Tesauro, E. Sansosti, G. Fornaro
2001 IEEE Transactions on Geoscience and Remote Sensing  
We present a new spotlight SAR data-focusing algorithm based on a two-step processing strategy that combines the advantages of two commonly adopted processing approaches: the efficiency of SPECAN algorithms  ...  The extension of the proposed technique to the case of high bandwidth transmitted chirp signals is also discussed.  ...  The extension of the proposed focusing procedure to the data acquired in the hybrid stripmap/spotlight mode proposed in [23] is at the moment under study. different foreign research institutes such as  ... 
doi:10.1109/36.951090 fatcat:dagenmonrrcafdicde32pmajji

Curvilinear Flight Synthetic Aperture Radar (CF-SAR): Principles, Methods, Applications, Challenges, and Trends

Zhanye Chen, Shiyang Tang, Yi Ren, Ping Guo, Yu Zhou, Yan Huang, Jun Wan, Linrang Zhang
2022 Remote Sensing  
Firstly, the basic concept, unified model, and general signal characteristics of CF-SAR are defined, derived, and analyzed, respectively.  ...  New mathematical models, signal characteristics, imaging algorithms, and system design criteria must be proposed and investigated for CF-SAR. This paper provides a comprehensive overview of CF-SAR.  ...  For CF-SAR with different modes, including stripmap, spotlight, sliding spotlight, and TOPS modes, etc., the main differences corresponding to the signal pattern between them depend on the beam steering  ... 
doi:10.3390/rs14132983 fatcat:f3tdvycgzjgqdbs5pwmd74kxdy

Deep Learning Meets SAR [article]

Xiao Xiang Zhu, Sina Montazeri, Mohsin Ali, Yuansheng Hua, Yuanyuan Wang, Lichao Mou, Yilei Shi, Feng Xu, Richard Bamler
2021 arXiv   pre-print
of deep learning applied to SAR in depth, summarize available benchmarks, and recommend some important future research directions.  ...  In this paper, we provide an introduction to the most relevant deep learning models and concepts, point out possible pitfalls by analyzing special characteristics of SAR data, review the state-of-the-art  ...  A variety of modes (stripmap, spotlight, ScanSAR, TOPS, etc.), swath-widths, incidence angles and polarizations can be programmed in near real-time.  ... 
arXiv:2006.10027v2 fatcat:s3tiroz4qve6nbhavtz77fbis4

High resolution sar for urban areas monitoring

Raffaella Guida
2007
In particular, an efficient SAR raw signal simulator for extended scenes is developed for the hybrid stripmap-spotlight configuration.  ...  This thesis contributes originally to the topic above, ranging from the simulation to the post-processing of high resolution SAR data.  ...  In this chapter efficient time and frequency domain based procedures to simulate the raw signal in the hybrid stripmap/spotlight mode are presented and compared.  ... 
doi:10.6092/unina/fedoa/2658 fatcat:2detpyv37vcn5fh37jzzi3fne4

Automatic Target Recognition in Synthetic Aperture Radar Imagery: A State-of-the-Art Review

Khalid El-Darymli, Eric W. Gill, Peter Mcguire, Desmond Power, Cecilia Moloney
2016 IEEE Access  
A brief overview for the breadth of the SAR-ATR challenges is conducted. This is couched in terms of a single-channel SAR, and it is extendable to multi-channel SAR systems.  ...  This paper is meant to be as self-contained as possible, and it approaches the SAR-ATR problem from a holistic end-to-end perspective.  ...  Paris Vachon from Defence R&D Canada (DRDC Ottawa) who provided advice and oversight to the project team for the last five years.  ... 
doi:10.1109/access.2016.2611492 fatcat:a3rngkwh3ffx3azyzjcivypbei

Digital beam-forming for high resolution wide swath real and synthetic aperture radar [online]

Marwan Younis
2004
Hybrid, stripmap/spotlight techniques exist, which offer some compromise between high resolution and wide coverage [10, 62] but are still bound to the same basic constraints.  ...  Simulated output signals at the positions indicated by the numbers within the boxes in Fig. 4.9 are shown separately in Figs. 4.10 to 4.12.Figures 4.10(a) and 4.10(b)show the raw SAR input signal, and  ...  Inserting (C.6) and W (u s ) into (C.1) gives The limits of the above integral have been extended to infinity, since the main contribution comes from the vicinity of u s where the exponential term is varying  ... 
doi:10.5445/ir/1572004 fatcat:ji7slp4bxnapvgzkmmfvnavecm

Multichannel Staggered SAR for High-Resolution Wide-Swath Imaging

Felipe Queiroz De Almeida
2018
Staggered SAR kombinieren.  ...  Die Dissertation beinhaltet sowohl neuartige Algorithmen für die Rekonstruktion von Mehrkanal-Staggered-SAR-Daten als auch Design-Beispiele für leistungsstarke HRWS-Satelliten-SAR-Systeme, die diese neue  ...  In the following, an overview of the classical Stripmap, Spotlight and ScanSAR modes (Section 2.4) was presented, to illustrate the trade-offs in system design.  ... 
doi:10.5445/ir/1000080475 fatcat:7szceyfnfvdcdkcb2omai7lrfa