High Resolution Wind Field Retrieval from Synthetic Aperture Radar: North Sea Examples

2008 ◽  
pp. 331-342 ◽  
Author(s):  
J. Horstmann ◽  
W. Koch
Keyword(s):  
High Resolution ◽  
Synthetic Aperture Radar ◽  
North Sea ◽  
Wind Field ◽  
Synthetic Aperture ◽  
Aperture Radar

scholarly journals ARCHAEOLOGICAL SURVEYS ON THE GERMAN NORTH SEA COAST USING HIGH-RESOLUTION SYNTHETIC APERTURE RADAR DATA

2017 ◽  
Vol XLII-3/W2 ◽  
pp. 65-69
Author(s):  
M. Gade ◽  
J. Kohlus ◽  
C. Kost
Keyword(s):  
Land Use ◽  
High Resolution ◽  
Synthetic Aperture Radar ◽  
North Sea ◽  
Synthetic Aperture ◽  
Historical Land Use ◽  
Wind Currents ◽  
Sea Coast ◽  
North Sea Coast ◽  
Aperture Radar

We show that high-resolution space-borne Synthetic Aperture Radar (SAR) imagery with pixel sizes well below 1&amp;thinsp;m<sup>2</sup> can be used to complement archaeological surveys in areas that are difficult to access. After major storm surges in the 14<sup>th</sup> and 17<sup>th</sup> centuries, vast areas on the German North Sea coast were lost to the sea. Areas of former settlements and historical land use were buried under sediments for centuries, but when the surface layer is driven away under the permanent action of wind, currents, and waves, they appear again on the Wadden Sea surface. However, the frequent flooding and erosion of the intertidal flats make any archaeological monitoring a difficult task, so that remote sensing techniques appear to be an efficient and cost-effective instrument for any archaeological surveillance of that area. Space-borne SAR images clearly show remnants of farmhouse foundations and of former systems of ditches, dating back to the 14<sup>th</sup> and to the 16<sup>th</sup>/17<sup>th</sup> centuries. In particular, the very high-resolution acquisition (<q>staring spotlight</q>) mode of the German TerraSAR/ TanDEM-X satellites allows for the detection of various kinds of residuals of historical land use with high precision. In addition, we also investigate the capability of SARs working at lower microwave frequencies (on Radarsat-2) to complement our archaeological survey of historical cultural traces, some of which have been unknown so far.

scholarly journals A Novel Orthogonal Waveform Separation Scheme for Airborne MIMO-SAR Systems

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3580 ◽  
Author(s):  
Jie Wang ◽  
Ke-Hong Zhu ◽  
Li-Na Wang ◽  
Xing-Dong Liang ◽  
Long-Yong Chen
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Synthetic Aperture Radar ◽  
3D Imaging ◽  
Synthetic Aperture ◽  
Separation Scheme ◽  
Sar Images ◽  
Wide Swath ◽  
Aperture Radar

In recent years, multi-input multi-output (MIMO) synthetic aperture radar (SAR) systems, which can promote the performance of 3D imaging, high-resolution wide-swath remote sensing, and multi-baseline interferometry, have received considerable attention. Several papers on MIMO-SAR have been published, but the research of such systems is seriously limited. This is mainly because the superposed echoes of the multiple transmitted orthogonal waveforms cannot be separated perfectly. The imperfect separation will introduce ambiguous energy and degrade SAR images dramatically. In this paper, a novel orthogonal waveform separation scheme based on echo-compression is proposed for airborne MIMO-SAR systems. Specifically, apart from the simultaneous transmissions, the transmitters are required to radiate several times alone in a synthetic aperture to sense their private inner-aperture channels. Since the channel responses at the neighboring azimuth positions are relevant, the energy of the solely radiated orthogonal waveforms in the superposed echoes will be concentrated. To this end, the echoes of the multiple transmitted orthogonal waveforms can be separated by cancelling the peaks. In addition, the cleaned echoes, along with original superposed one, can be used to reconstruct the unambiguous echoes. The proposed scheme is validated by simulations.

scholarly journals HIGH-RESOLUTION GRID-INDEPENDENT IMAGING FOR TERAHERTZ 2-D SYNTHETIC APERTURE RADAR WITH SPATIAL UNDER-SAMPLING

2017 ◽  
Vol 160 ◽  
pp. 29-39
Author(s):  
Li Ding ◽  
Xi Ding ◽  
Yangyang Ye ◽  
Sixuan Wu ◽  
Yiming Zhu
Keyword(s):  
High Resolution ◽  
Synthetic Aperture Radar ◽  
Synthetic Aperture ◽  
Under Sampling ◽  
Aperture Radar

High-resolution planetary imaging via spotlight-mode synthetic aperture radar

1998 ◽  
Vol 7 (11) ◽  
pp. 1571-1582 ◽  
Author(s):  
J.L.H. Webb ◽  
D.C. Munson ◽  
N.J.S. Stacy
Keyword(s):  
High Resolution ◽  
Synthetic Aperture Radar ◽  
Synthetic Aperture ◽  
Aperture Radar
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