Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Unmanned Airborne Bistatic InSAR Data Processing Method Using Bi-Directional Synchronization Chain Signals

Version 1 : Received: 3 January 2024 / Approved: 4 January 2024 / Online: 4 January 2024 (15:35:35 CET)

A peer-reviewed article of this Preprint also exists.

Zhu, J.; Lin, B.; Pan, J.; Cheng, Y.; Qiu, X.; Jiang, W.; Liu, Y.; Liu, M. Unmanned Airborne Bistatic Interferometric Synthetic Aperture Radar Data Processing Method Using Bi-Directional Synchronization Chain Signals. Remote Sens. 2024, 16, 769. Zhu, J.; Lin, B.; Pan, J.; Cheng, Y.; Qiu, X.; Jiang, W.; Liu, Y.; Liu, M. Unmanned Airborne Bistatic Interferometric Synthetic Aperture Radar Data Processing Method Using Bi-Directional Synchronization Chain Signals. Remote Sens. 2024, 16, 769.

Abstract

The dual-station Interferometric Synthetic Aperture Radar (InSAR) system can overcome the physical limitations imposed by the baseline of single-station dual-antenna InSAR. It provides greater flexibility and can enhance elevation measurement accuracy through a well-designed baseline configuration.Unmanned aerial vehicles (UAV) equipped with dual-station InSAR, with relatively low cost and high flexibility, are useful for mapping and land resource exploration. However, due to challenges including spatiotemporal synchronization and motion errors, there are limited reports on UAV-borne dual-station InSAR. This paper proposes a comprehensive method for processing data from small UAV-borne dual-station InSAR by integrating two-way synchronization chain signals. The proposed method includes compensation for time and phase synchronization errors, trajectory refinement with synchronized chain and Position and Orientation System (POS) data, high-precision dual-station InSAR imaging and interferometric processing. Height inversion results based on the proposed method is also provided, demonstrating the effectiveness of the proposed method and improving interferometric accuracy at calibration points from 0.66 meters to 0.42 meters.

Keywords

InSAR; Dual-station SAR; UAV-borne SAR; Synchronization signal; SAR imaging

Subject

Environmental and Earth Sciences, Remote Sensing

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