A New Spaceborne Burst Synthetic Aperture Radar Imaging Mode for Wide Swath Coverage

This paper presents a new spaceborne synthetic aperture radar (SAR) burst mode named “Extended Terrain Observation by Progressive Scans (ETOPS)” for wide swath imaged coverage. This scheme extends the imaging performance of the conventional Terrain Observation by Progressive Scans (TOPS) mode with a very limited azimuth beam steering capability. Compared with the TOPS mode with the same azimuth beam steering range for the same swath width, a finer azimuth resolution could be obtained. With the same system parameters, examples of four burst SAR imaging modes named ScanSAR, TOPS, inverse TOPS (ITOPS) and ETOPS are given, and their corresponding system performances are analyzed and compared. Simulation results show that the proposed ETOPS mode could obtain a better high-resolution wide-swath imaging performance under the same conditions.

[1]  Wei Xu,et al.  Investigation on Electronic Azimuth Beam Steering in the Spaceborne Sar Imaging Modes , 2011 .

[2]  Malcolm Davidson,et al.  Sentinel-1 ESA's New European Radar Observatory , 2008 .

[3]  Claudio Prati,et al.  ScanSAR focusing and interferometry , 1996, IEEE Trans. Geosci. Remote. Sens..

[4]  M. A. Brown,et al.  Wide-swath SAR , 1992 .

[5]  Richard K. Moore,et al.  Scanning Spaceborne Synthetic Aperture Radar with Integrated Radiometer , 1981, IEEE Transactions on Aerospace and Electronic Systems.

[6]  Wei Xu,et al.  An Efficient Approach With Scaling Factors for TOPS-Mode SAR Data Focusing , 2011, IEEE Geoscience and Remote Sensing Letters.

[7]  Fuk K. Li,et al.  Synthetic aperture radar interferometry , 2000, Proceedings of the IEEE.

[8]  Josef Mittermayer,et al.  Scalloping Correction in TOPS Imaging Mode SAR Data , 2012, IEEE Geoscience and Remote Sensing Letters.

[9]  Mike E. Davies,et al.  Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR , 2016 .

[10]  Wei Xu,et al.  TOPSAR data focusing based on azimuth scaling preprocessing , 2011 .

[11]  Francesco De Zan,et al.  TOPSAR: Terrain Observation by Progressive Scans , 2006, IEEE Transactions on Geoscience and Remote Sensing.

[12]  Richard Bamler,et al.  Burst-mode and ScanSAR interferometry , 2002, IEEE Trans. Geosci. Remote. Sens..

[13]  F. Rocca,et al.  Burst-mode SARs for wide-swath surveys , 2007 .

[14]  J. Mittermayer,et al.  TerraSAR-X TOPSAR and ScanSAR comparison , 2008 .

[15]  Josef Mittermayer,et al.  TOPS Imaging With TerraSAR-X: Mode Design and Performance Analysis , 2010, IEEE Transactions on Geoscience and Remote Sensing.