Efficient Strip-Mode SAR Raw-Data Simulator of Extended Scenes Included Moving Targets Based on Reversion of Series

Yang, Liang; Zeng, Daojian; Yan, Jianhua; Sai, Yaozhang

doi:10.32604/cmc.2020.09809

Cited by 1 publication

(1 citation statement)

References 9 publications

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“…It improves the simulation efficiency compared to time-domain methods and generates raw data by coherently stacking the echoes of each pulse from the radar. The two-dimensional frequency-domain method [16,17] uses the principle that the echo signal is the two-dimensional convolution of the target scattering coefficient and SAR system impulse function to accelerate the implementation of the signal convolution in the two-dimensional frequency domain, greatly improving the efficiency. The inverse imaging processing method [10,18] uses any SAR image as a reflectivity map and uses the inverse processing of the imaging algorithm to obtain SAR raw data.…”

Section: Introductionmentioning

confidence: 99%

Raw Data Simulation of Spaceborne Synthetic Aperture Radar with Accurate Range Model

Jiang

et al. 2023

Remote Sensing

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Simulated raw data have become an essential tool for testing and assessing system parameters and imaging performance due to the high cost and limited availability of real raw data from spaceborne synthetic aperture radar (SAR). However, with increasing resolution and higher orbit altitudes, existing simulation methods fail to generate SAR simulated raw data that closely resemble real raw data. This is due to approximations such as curved orbits, “stop-and-go” assumption, and Earth’s rotation, among other factors. To overcome these challenges, this paper presents an accurate range model with a “nonstop-and-go” configuration for raw data simulation based on existing time-domain simulation methods. We model the SAR echo signal and establish a precise space geometry for spaceborne SAR. Additionally, we precisely identify the target illumination area based on elliptical beams through space coordinate transformation. Finally, the SAR raw data were accurately simulated using high-precision time-domain simulation methods. The accuracy of the proposed model was validated by comparing it with the traditional hyperbolic model and the curved orbit model with “stop-and-go” assumption through image processing of the generated raw data. Through the analysis of point target quality parameters, the errors of various parameters in our distance model compared with the other two models are within 1%. Furthermore, this simulation method can be adapted to simulate raw data of other modes and satellite orbits by adjusting beam control and satellite orbit parameters, respectively. The proposed simulation method demonstrated high accuracy and versatility, thereby providing a valuable contribution to the development of remote sensing technology.

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Section: Introductionmentioning

confidence: 99%

Raw Data Simulation of Spaceborne Synthetic Aperture Radar with Accurate Range Model

Jiang

et al. 2023

Remote Sensing

View full text Add to dashboard Cite

show abstract

Efficient Strip-Mode SAR Raw-Data Simulator of Extended Scenes Included Moving Targets Based on Reversion of Series

Cited by 1 publication

References 9 publications

Raw Data Simulation of Spaceborne Synthetic Aperture Radar with Accurate Range Model

Raw Data Simulation of Spaceborne Synthetic Aperture Radar with Accurate Range Model

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