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Remote Sens. 2019, 11(3), 346; https://doi.org/10.3390/rs11030346

Modeling and Precise Processing for Spaceborne Transmitter/Missile-Borne Receiver SAR Signals

1
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2
College of Communication and Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
*
Authors to whom correspondence should be addressed.
Received: 14 January 2019 / Revised: 28 January 2019 / Accepted: 5 February 2019 / Published: 10 February 2019
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Abstract

The spaceborne transmitter/missile-borne receiver (ST/MR) synthetic aperture radar (SAR) could provide several unique advantages, such as wide coverage, unrestricted geography, a small detection probability of the missile, and forward-looking imaging. However, it is also accompanied by problems in imaging, including geometric model establishment and focusing algorithm design. In this paper, an ST/MR SAR model is first presented and then the flight-path constraint, characterized by geometric configurations, is derived. Considering the impacts brought about by the maneuvers of the missile, a non-‘Stop-Go’ mathematical model is devised and it can avoid the large errors introduced by the acceleration, which is neglected in the traditional model. Finally, a two-dimensional (2-D) scaling algorithm is developed to focus the ST/MR data. Without introducing any extra operations, it can greatly remove the spatial variations of the range, azimuth, and cross-coupling phases simultaneously and entirely in the 2-D hybrid domain. Simulation results verify the effectiveness of the proposed model and focusing approach. View Full-Text
Keywords: spaceborne transmitter/missile-borne receiver (ST/MR); synthetic aperture radar (SAR); two-dimensional (2-D) scaling algorithm; cross-coupling; spatial variation spaceborne transmitter/missile-borne receiver (ST/MR); synthetic aperture radar (SAR); two-dimensional (2-D) scaling algorithm; cross-coupling; spatial variation
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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 (CC BY 4.0).
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Tang, S.; Guo, P.; Zhang, L.; Lin, C. Modeling and Precise Processing for Spaceborne Transmitter/Missile-Borne Receiver SAR Signals. Remote Sens. 2019, 11, 346.

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