Estimating the Observation Area of a Stripmap SAR via an ISAR Image Sequence

Bo Li, Defeng Chen*, Huawei Cao, Junling Wang, Haiguang Li, Tuo Fu, Shuo Zhang, Lizhi Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The stripmap mode is a basic and important mode for spaceborne synthetic aperture radars (SARs). Estimating the time-varying area observed by spaceborne SARs operating in stripmap mode is a practical but challenging field of research. In this article, we propose a novel method that parameterizes the time-varying area observed by the spaceborne SAR operating in the boresight stripmap mode into a fixed antenna attitude. Based on the principle of minimizing the dihedral angle between the plane containing the ideal estimated scatterers and the plane containing the actual parabolic antenna edge of a spaceborne SAR, an objective function is established for estimating the area observed by a spaceborne SAR operating in the boresight stripmap mode. Then, simulation experiments are designed to validate the feasibility and the robustness of the proposed method. The experimental simulation results show that the proposed method is feasible, and even under low signal-to-noise ratio (SNR) conditions of 10 dB, the proposed method still has good robustness.

Original languageEnglish
Article number5484
JournalRemote Sensing
Volume15
Issue number23
DOIs
Publication statusPublished - Dec 2023

Keywords

  • ISAR image sequence
  • attitude estimation
  • inverse synthetic aperture radar (ISAR) imaging projection matrix
  • observation area estimation
  • stripmap SAR

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