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.
Highlights
The airborne downward looking sparse linear array three dimensional synthetic aperture radar (DLSLA 3-D SAR) can be placed on small and mobile platforms to acquire high resolution full 3-D microwave images
For airborne DLSLA 3-D SAR echo signal acquisition, along-track Doppler cone angle γ1 is obtained with platform movement and cross-track Doppler cone angle γ2 is obtained with sparse array, which means the scatters can be differentiated in the along-track and the cross-track dimension
We present two DLSLA 3-D SAR numerical simulation experiments to illustrate the performance of our proposed heterogeneous parallel simulation method
Summary
The airborne downward looking sparse linear array three dimensional synthetic aperture radar (DLSLA 3-D SAR) can be placed on small and mobile platforms to acquire high resolution full 3-D microwave images. Downward Looking Imaging Radar (DLIR) was first introduced by Gierull in 1999 [13] He took advantage of aperture synthesis by along-track platform movement and cross-track physical linear array to generate along-track and cross-track two dimensional images with a single frequency transmitted signal. The heterogeneous parallel DLSLA 3-D SAR image reconstruction simulation, with the 3-D polar format algorithm [34], polar formatting and an L1 regularization algorithm [35], is performed with wave front curvature phase error compensation. DLSLA 3-D SAR Imaging Geometry, Echo Signal Model and Heterogeneous Parallel Technique
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
