Báo cáo hóa học: "Research Article Moving Target Indication via RADARSAT-2 Multichannel Synthetic Aperture Radar Processing"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Moving Target Indication via RADARSAT-2 Multichannel Synthetic Aperture Radar Processing | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 740130 19 pages doi 2010 740130 Research Article Moving Target Indication via RADARSAT-2 Multichannel Synthetic Aperture Radar Processing S. Chiu1 and M. V. Dragosevic2 1Defence R D Canada-Ottawa DRDC Ottawa Radar System Section 3701 Carling Avenue Ottawa ON Canada K1A 0Z4 2TerraBytes Consulting Ottawa ON Canada K1Z 8K6 Correspondence should be addressed to S. Chiu Received 29 June 2009 Accepted 20 October 2009 Academic Editor Carlos Lopez-Martinez Copyright 2010 S. Chiu and M. V. Dragosevic. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. With the recent launches of the German TerraSAR-X and the Canadian RADARSAT-2 both equipped with phased array antennas and multiple receiver channels synthetic aperture radar ground moving target indication SAR-GMTI data are now routinely being acquired from space. Defence R D Canada has been conducting SAR-GMTI trials to assess the performance and limitations of the RADARSAT-2 GMTI system. Several SAR-GMTI modes developed for RADARSAT-2 are described and preliminary test results of these modes are presented. Detailed equations of motion of a moving target for multiaperture spaceborne SAR geometry are derived and a moving target parameter estimation algorithm developed for RADARSAT-2 called the Fractrum Estimator is presented. Limitations of the simple dual-aperture SAR-GMTI mode are analysed as a function of the signal-to-noise ratio and target speed. Recently acquired RADARSAT-2 GMTI data are used to demonstrate the capability of different system modes and to validate the signal model and the algorithm. 1. Introduction . Motivation. Due to the significant clutter Doppler spread that is imparted by a fast-moving space-based radar .

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