AN INTEGRATED METHOD FOR REFOCUSING OF MOVING TARGETS IN SPOTLIGHT SAR

Yıl 2023, , 41 - 53, 30.06.2023

İbrahim Papila , Selçuk Paker Mesut Kartal

https://doi.org/10.53600/ajesa.1321178

Öz

A new target-refocusing technique based-on re-centering phase computation of previously recorded moving target raw data is implemented to the Spotlight SAR data in order to obtain refocused moving targets. The technique is tested on the integrated simulated data; background real spotlight SAR Raw data with the synthetically generated data domes of civilian moving targets. First Polar format Algorithm is applied to detect and estimate the speed of ground-moving targets on the integrated raw data. At the next step, re-organize the integrated raw data by selecting and arranging target focusing center with a new technique based on re-centering phase computation to each moving target speed. At the third step re-organize the raw data by re-centering the phase computation to each moving target location. Finally, Polar Format Algorithm is applied to each reorganized raw data to obtain highly focused moving targets individually

Anahtar Kelimeler

Ground moving target, spotlight SAR, Refocusing, phase correction, Polar Format Algorithm

Kaynakça

• Cristallini D., P. Lombardo, D. Pastina, A. Mennella, 2009. Chirp Scaling Based Detection of Moving Targets in SAR Images, IEEE International Geoscience and Remote Sensing Symposium pp. V-340-V-343
• Deming R., M. Best, and S. Farrell. 2014. Polar format algorithm for SAR imaging with Matlab, Proceedings of SPIE, Algorithms for Synthetic Aperture Radar Imagery XXI (9093)
• Dias, J., P. Marques. 2003. Multiple Moving Target Detection and Trajectory Estimation Using a single SAR Sensor, IEEE Transacsions on Aerospace and Electronic systems (39) 2, 604-624
• Fienup, J. 2001. Detection Moving Targets in SAR Imagery by Focusing, IEEE Transacsions on Aerospace and Electronic systems (37) 3, 794-808
• Gaohuan L., Y. Li, G. Wang and Y. Zhang. 2016. Ground Moving Target Indication in SAR Images with Symmetric Doppler Views, , IEEE Transacsions on Geoscience and Remote Sensing (54) 1, 533-543 Mao X., D.Y. Zhu and Z. D. Zhu. 2009. Signatures of Moving Target in Polar Format Spotlight SAR Image, Progress in Electromagnetics Research PIER 92, 47-64
• Papila I., S. Paker, M. Kartal, S. Kent. 2015. Refocusing of Moving Targets in Spotlight SAR Raw Data, 23rd Signal Processing and Communications Applications Conference (SIU), Malatya Turkiye Pastina D., G. Battistello, A. Aprile. 2008. Change detection based GMTI on single channel SAR images, proc. of EUSAR 2008, vol. 3, pp. 85-88, Friedrichshaffen, Germany
• Pastina D., L. Buratta, F. Turin, D. Cristallini. 2011. Expliting COSMO-SkyMed spotlight SAR Images for GMTI applications, IEEE CIE International Conference on Radar, pp. 1918-1921, Chengdu Rahmanizadeh A., J. Amini. 2017. An integration Method for Simulation of SAR Raw Data in Moving Target Detection, Remote Sensing (9) 10, 1009
• Raney R., H. Runge, R. Bamler, I. Cumming and F. Wong. 1994. Precision SAR processing using chirp scaling, IEEE Transactions on Geoscience and Remote Sensing (32) 4, 786-799
• Ruizhi H., X. Li, T. Yeo, Y. Yang, C. Chi, F. Zuo, X. Hu, and Y. Pi. 2019. Refocusing and Zoom-In Polar Format Algorithm for Curvilinear Spotlight SAR Imaging on Arbitrary Region of Interest, IEEE Transacsions on Geoscience and Remote Sensing (57) 10,7995-8010
• Sjogren T., V. Vu, M. Petterson, A. Gustavsson, L. Ulander. 2012. Moving Target Relative Speed Estimation and Refocusing in Synthetic Aperture Radar Images, IEEE Transacsions on Aerospace and Electronic systems (48) 3, 2426-2436
• Yang J., C. Liu, Y. Wang. 2015. Detection and Imaging of Ground Moving Targets With Real SAR Data, IEEE Transacsions on Geoscience and Remote Sensing (53) 2, 920-932
• Yang J., Y. Zhang. 2015. Analysis on the Azimuth Shift of a Moving Target in SAR Image, Progress in Electromagnetics Research (42), 121-134
• Zhu S., G. Liao. 2011. Ground Moving Targets Imaging Algorithm for Synthetic Aperture Radar, IEEE Transacsions on Geoscience and Remote Sensing (49) 1, 462-477