实时轨道条件下Sentinel-1卫星影像干涉配准
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摘要
Sentinel-1卫星步进扫描模式干涉处理方位向配准精度要求达到0.001个像素,通常在精密轨道条件下采用几何配准联合增强谱分集完成影像的配准。但Sentinel-1卫星精密轨道发布较晚,而实时轨道精度较低,几何配准后易导致增强谱分集相位缠绕。为了进一步修正实时轨道条件下的几何配准结果,满足卫星干涉实时处理的需要,选取以点目标为中心的窗口进行相关配准,并对多组Burst配准结果进行拼接处理,以提高相关配准算法的可靠性和精度,确保配准精度满足增强谱分集的要求。
An azimuth coregistration accuracy of 0.001 pixel is required for Sentinel-1 terrain observation by progressive scans(TOPS) interferometric processing, which is usually accomplished by a geometric coregestration and enhanced spectral diversity based on precise orbit information. However, the precise orbit information is distributed later than TOPS synthetic aperture radar(SAR) products, and the accuracy of real-time orbits is not high enough, which could result the phase of enhanced spectral diversity wrapped after geometric coregistration. We aim to improve the geometric coregistration accuracy using real-time orbits to meet the requirement of interferometric processing of Sentinel-1. Firstly, the windows centered by point scatterers are selected to perform the cross correlation coregistration. Then, multi-bursts results are mosaicked to improve the accuracy and reliability of cross correlation coregistration approach, which promises the coregistration accuracy for enhanced spectral diversity. Finally, this method is validated by a real case.
An azimuth coregistration accuracy of 0.001 pixel is required for Sentinel-1 terrain observation by progressive scans(TOPS) interferometric processing, which is usually accomplished by a geometric coregestration and enhanced spectral diversity based on precise orbit information. However, the precise orbit information is distributed later than TOPS synthetic aperture radar(SAR) products, and the accuracy of real-time orbits is not high enough, which could result the phase of enhanced spectral diversity wrapped after geometric coregistration. We aim to improve the geometric coregistration accuracy using real-time orbits to meet the requirement of interferometric processing of Sentinel-1. Firstly, the windows centered by point scatterers are selected to perform the cross correlation coregistration. Then, multi-bursts results are mosaicked to improve the accuracy and reliability of cross correlation coregistration approach, which promises the coregistration accuracy for enhanced spectral diversity. Finally, this method is validated by a real case.
引文
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[13]Yague-Martinez N,Prats-Iraola P,Kraus T,et al.Experimental Validation with TerraSAR-X/TanDEM-X of Advanced Interferometric Modes for Accurate Retrieval of Azimuthal Displacements[C].IGRASS,Beijing,China,2016
[14]Prats-Iraola P,Nannini M,Scheiber R,et al.Sentinel-1 Assessment of the Interferometric Wide-Swath Mode[C].IGARSS,Milan,Italy,2015
[15]Rodriguez-Cassola M,Prats-Iraola P,de Zan F,et al.Doppler-Related Distortions in Tops SAR Images[J].IEEE Trans Geosci Remote Sens,2015,53(1):25-35
[16]de Zan F.Accuracy of Incoherent Speckle Tracking for Circular Gaussian Signals[J].IEEE Geosci Remote Sens Lett,2014,11(1):264-267
[17]Sansosti E,Berardino P,Manunta M,et al.Geometrical SAR Image Registration[J].IEEE Trans Geosci Remote Sens,2006,44(10):2 681-2 870
[18]Prats-Iraola P,Rodriguez-Cassola M,de Zan F,et al.Role of the Orbital Tube on Interferometric Spaceborne SAR Missions[J].IEEE Geosci Remote Sens Lett,2015,12(7):1 486-1 490
[19]Scheiber R,Jager M,Prats-Iraola P,et al.Speckle Tracking and Interferometric Processing of TerraSAR-X TOPS Data for Mapping Nonstationary Scenarios[J].IEEE J Sel Topics Appl Earth Observ Remote Sens,2014,8(4):1 709-1 720
[20]Bamler R,Eineder M.Accuracy of Differential Shift Estimation by Correlation and Split-Width Interferometry for Wideband and Delta-k SAR Systems[J].IEEE Geosci Remote Sens Lett,2005,2(2):151-155
[21]de Zan F,Prats-Iraola P,Rodriguez-Cassola M.On the Dependence of Delta-k Efficiency on Multilooking[J].IEEE Geosci Remote Sens Lett,2015,12(8):1 745-1 749
[22]Bechor N B D,Zebker H A.Measuring Two-Dimensional Movements Using a Single InSAR Pair[J].Geophys Res Lett,2006,331(16):275-303
[23]Wegmuller U,Strozzi T,Werner C.Ionospheric Path Delay Estimation Using Split-Beam Interferometry[C].IGARSS,Munich,Germany,2012
[24]Gomba G,Parizzi A,de Zan F,et al.Toward Operational Compensation of Ionospheric Effects in SARInterferograms:The Split-Spectrum Method[J].IEEE Trans Geosci Remote Sens,2016,54(3):1 446-1 461
[25]Serafino F.SAR Image Coregistration Based on Isolated Point Scatterers[J].IEEE Geosci Remote Sens Lett,2006,3(3):354-358
[26]Marinkovic P,Hanssen R.Advanced InSARCoregistration Using Point Clusters[C].IGARSS,Anchorage,AK,USA,2004
[27]Wu Wenhao.TOPS Interferometry with Sentinel-1[D].Wuhan:Wuhan University,2016(吴文豪.Sentinel-1雷达卫星TOPS模式干涉处理研究[D].武汉:武汉大学,2016)
[2]Gatelli F,Guarnieri A M,Parizzi F,et al.The Wavenumber Shift in SAR Interferometry[J].IEEETrans Geosci Remote Sens,1994,32(4):855-865
[3]Prats P,Marotti L,Wollstadt S,et al.TOPS Interferometry with TerrraSAR-X[C].EUSAR,Aachen,Germany,2010
[4]de Zan F,Prats-Iraola P,Schriber R,et al.Interferometry with TOPS:Coregistration and Azimuth Shifts[C].EUSAR,Berlin,Germany,2014
[5]Yague-Martinez N,Prats-Iraola P,Gonzalez F R,et al.Interferometric Processing of Sentinel-1TOPS Data[J].IEEE Trans Geosci Remote Sens,2016,54(4):1 127-1 143
[6]Yague-Martinez N,Prats-Iraola P,de Zan F.Coregistration of Interferometric Stacks of Sentinel-1A TOPS Data[C].EUSAR,Hamburg,Germany,2016
[7]Fattahi H,Agram P,Simons M.A Network-Based Enhanced Spectral Diversity Approach for TOPSTime-Series Analysis[J].IEEE Trans Geosci Remote Sens,2017,55(2):777-786
[8]Nitti D O,Hassen R F,Refice A,et al.Impact of DEM-Assisted Coregistration on High-Resolution SAR Interferometry[J].IEEE Trans Geosci Remote Sens,2011,49(3):1 127-1 143
[9]Yague-Martinez N,Eineder M,Brcic R,et al.TanDEM-X Mission:SAR Image Coregistration Aspects[C].EUSAR,Aachen,Germany,2010
[10]Wang Mi,Yang Bo,Jin Shuying.A Registration Method Based on Object-Space Positioning Consistency for Satellite Multi-spectral Image[J].Geomatics and Information Science of Wuhan University,2013,38(7):765-769(王密,杨博,金淑英.一种利用物方定位一致性的多光谱卫星影像自动精确配准方法[J].武汉大学学报·信息科学版,2013,38(7):765-769)
[11]Wu Wenhao,Zhou Zhiwei,Li Tao,et al.A Study of Sentinel-1 TOPS Mode Co-registration[J].Acta Geodaetica et Cartographica Sinica,2017,46(9):1 156-1 164(吴文豪,周志伟,李陶,等.精密轨道支持下的Sentinel-1卫星TOPS模式干涉处理[J].测绘学报,2017,46(9):1 156-1 164)
[12]Scheiber R,Moreira A.Coregistration of Interferometric SAR Images Using Spectral Diversity[J].IEEE Trans Geosci Remote Sens,2000,38(5):2 179-2 191
[13]Yague-Martinez N,Prats-Iraola P,Kraus T,et al.Experimental Validation with TerraSAR-X/TanDEM-X of Advanced Interferometric Modes for Accurate Retrieval of Azimuthal Displacements[C].IGRASS,Beijing,China,2016
[14]Prats-Iraola P,Nannini M,Scheiber R,et al.Sentinel-1 Assessment of the Interferometric Wide-Swath Mode[C].IGARSS,Milan,Italy,2015
[15]Rodriguez-Cassola M,Prats-Iraola P,de Zan F,et al.Doppler-Related Distortions in Tops SAR Images[J].IEEE Trans Geosci Remote Sens,2015,53(1):25-35
[16]de Zan F.Accuracy of Incoherent Speckle Tracking for Circular Gaussian Signals[J].IEEE Geosci Remote Sens Lett,2014,11(1):264-267
[17]Sansosti E,Berardino P,Manunta M,et al.Geometrical SAR Image Registration[J].IEEE Trans Geosci Remote Sens,2006,44(10):2 681-2 870
[18]Prats-Iraola P,Rodriguez-Cassola M,de Zan F,et al.Role of the Orbital Tube on Interferometric Spaceborne SAR Missions[J].IEEE Geosci Remote Sens Lett,2015,12(7):1 486-1 490
[19]Scheiber R,Jager M,Prats-Iraola P,et al.Speckle Tracking and Interferometric Processing of TerraSAR-X TOPS Data for Mapping Nonstationary Scenarios[J].IEEE J Sel Topics Appl Earth Observ Remote Sens,2014,8(4):1 709-1 720
[20]Bamler R,Eineder M.Accuracy of Differential Shift Estimation by Correlation and Split-Width Interferometry for Wideband and Delta-k SAR Systems[J].IEEE Geosci Remote Sens Lett,2005,2(2):151-155
[21]de Zan F,Prats-Iraola P,Rodriguez-Cassola M.On the Dependence of Delta-k Efficiency on Multilooking[J].IEEE Geosci Remote Sens Lett,2015,12(8):1 745-1 749
[22]Bechor N B D,Zebker H A.Measuring Two-Dimensional Movements Using a Single InSAR Pair[J].Geophys Res Lett,2006,331(16):275-303
[23]Wegmuller U,Strozzi T,Werner C.Ionospheric Path Delay Estimation Using Split-Beam Interferometry[C].IGARSS,Munich,Germany,2012
[24]Gomba G,Parizzi A,de Zan F,et al.Toward Operational Compensation of Ionospheric Effects in SARInterferograms:The Split-Spectrum Method[J].IEEE Trans Geosci Remote Sens,2016,54(3):1 446-1 461
[25]Serafino F.SAR Image Coregistration Based on Isolated Point Scatterers[J].IEEE Geosci Remote Sens Lett,2006,3(3):354-358
[26]Marinkovic P,Hanssen R.Advanced InSARCoregistration Using Point Clusters[C].IGARSS,Anchorage,AK,USA,2004
[27]Wu Wenhao.TOPS Interferometry with Sentinel-1[D].Wuhan:Wuhan University,2016(吴文豪.Sentinel-1雷达卫星TOPS模式干涉处理研究[D].武汉:武汉大学,2016)
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