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Along- and Cross-Track Relocation for Ground Moving Target in a Squint Multichannel SAR System.

Zuzhen Huang¹, Aifang Liu¹, Rui Zhang¹

¹Nanjing Research Institute of Electronic Technology, Nanjing 210039, China.

Sensors (Basel, Switzerland)

|June 12, 2026

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This study introduces a new method for accurately locating ground moving targets in squint synthetic aperture radar (SAR) imagery. The technique addresses two-dimensional shifts, improving target tracking and analysis in advanced radar systems.

Area of Science:

Remote Sensing
Radar Technology
Signal Processing

Background:

Squint synthetic aperture radar (SAR) offers enhanced flexibility over side-looking SAR.
Ground moving targets in squint SAR systems experience complex two-dimensional positional shifts.

Purpose of the Study:

To develop and validate a novel two-dimensional relocation method for ground moving targets in squint SAR.
To analyze the correlation between target shifts, radial velocity, and imaging location.

Main Methods:

Analysis of shift characteristics for moving targets in squint SAR.
Implementation of clutter suppression and radial velocity estimation.
Solving a set of joint equations for two-dimensional location derivation.

Keywords:

ground moving target indication squint synthetic aperture radar (SAR)target relocation

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Main Results:

The proposed method effectively relocates ground moving targets in squint SAR imagery.
Demonstrated correlation between target shifts and both radial velocity and imaging location.
Numerical experiments confirm the algorithm's efficacy.

Conclusions:

The developed two-dimensional relocation method accurately addresses the challenges of moving target detection in squint SAR.
This technique enhances the applicability of squint SAR for monitoring ground targets.