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Remote Sens. 2013, 5(10), 5304-5329; doi:10.3390/rs5105304

Airborne Downward Looking Sparse Linear Array 3-D SAR Heterogeneous Parallel Simulation

1
Science and Technology on Microwave Imaging Laboratory (MITL), Institute of Electronics, Chinese Academy of Sciences (IECAS), No. 19, North 4th Ring West, Beijing 100190, China
2
University of Chinese Academy of Sciences, No. 19A Yuquanlu, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Received: 22 August 2013 / Revised: 9 October 2013 / Accepted: 14 October 2013 / Published: 22 October 2013

Abstract

The airborne downward looking sparse linear array three dimensional synthetic aperture radar (DLSLA 3-D SAR) operates nadir observation with the along-track synthetic aperture formulated by platform movement and the cross-track synthetic aperture formulated by physical sparse linear array. Considering the lack of DLSLA 3-D SAR data in the current preliminary study stage, it is very important and essential to develop DLSLA 3-D SAR simulation (echo generation simulation and image reconstruction simulation, including point targets simulation and 3-D distributed scene simulation). In this paper, DLSLA 3-D SAR imaging geometry, the echo signal model and the heterogeneous parallel technique are discussed first. Then, heterogeneous parallel echo generation simulation with time domain correlation and the frequency domain correlation method is described. In the following, heterogeneous parallel image reconstruction simulation with two imaging algorithms, e.g., 3-D polar format algorithm, polar formatting and L1 regularization algorithm is discussed. Finally, the point targets and the 3-D distributed scene simulation are demonstrated to validate the effectiveness and performance of our proposed heterogeneous parallel simulation technique. The 3-D distributed scene employs airborne X-band DEM and P-band Circular SAR image of the same area as simulation scene input.
Keywords: airborne downward looking sparse linear array 3-D SAR; heterogeneous parallel; echo generation; time domain correlation; frequency domain correlation; image reconstruction; polar formatting; L1 regularization airborne downward looking sparse linear array 3-D SAR; heterogeneous parallel; echo generation; time domain correlation; frequency domain correlation; image reconstruction; polar formatting; L1 regularization
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Peng, X.; Wang, Y.; Hong, W.; Tan, W.; Wu, Y. Airborne Downward Looking Sparse Linear Array 3-D SAR Heterogeneous Parallel Simulation. Remote Sens. 2013, 5, 5304-5329.

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