Experimental Results of Three-Dimensional Modeling and Mapping with Airborne Ka-Band Fixed-Baseline InSAR in Typical Topographies of China

Gao, Jian; Sun, Zhongchang; Guo, Huadong; Wei, Lideng; Li, Yongjie; Xing, Qiang

doi:10.3390/rs14061355

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…where µ =< r, v >, η =< r, n >, ς =< r, ŵ >, and < • > represents the inner product operation between vectors. Therefore, the representation of the unit look vector in the moving coordinate system can be calculated as [27][28][29]:…”

Section: Platform Three-dimensional Positioning Model Based On Insar ...mentioning

confidence: 99%

Airborne Platform Three-Dimensional Positioning Method Based on Interferometric Synthetic Aperture Radar Interferogram Matching

Li,

Wang,

Wang

et al. 2024

Remote Sensing

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As the demand for precise navigation of aircraft increases in modern society, researching high-precision, high-autonomy navigation systems is both theoretically valuable and practically significant. Because the inertial navigation system (INS) has systematic and random errors, its output information diverges. Therefore, it is necessary to combine them with other navigation systems for real-time compensation and correction of these errors. The SAR matching positioning and navigation system uses synthetic aperture radar (SAR) image matching for platform positioning and compensates for the drift caused by errors in the inertial measurement unit (IMU). Images obtained by SAR are matched with digital landmark data, and the platform’s position is calculated based on the SAR imaging geometry. However, SAR matching positioning faces challenges due to seasonal variations in SAR images, the need for typical landmarks for matching, and the lack of elevation information in two-dimensional SAR image matching. This paper proposes an airborne platform positioning method based on interferometric SAR (InSAR) interferogram matching. InSAR interferograms contain terrain elevation information, are less affected by seasonal changes, and provide higher positioning accuracy and robustness. By matching real-time InSAR-processed interferograms with simulated interferograms using a digital elevation model (DEM), three-dimensional position information about the matching points has been obtained. Subsequently, a three-dimensional positioning model for the platform has bene established using the unit line-of-sight vector decomposition method. In actual flight experiments using an FMCW Ku-band Interferometric SAR system, the proposed platform positioning framework demonstrated its ability to achieve precise positioning in the absence of signals from the global navigation satellite system (GNSS).

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Section: Platform Three-dimensional Positioning Model Based On Insar ...mentioning

confidence: 99%

Airborne Platform Three-Dimensional Positioning Method Based on Interferometric Synthetic Aperture Radar Interferogram Matching

Li,

Wang,

Wang

et al. 2024

Remote Sensing

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“…Lu et al proposed a single-flight interferometric calibration method that simplifies traditional multi-flight interferometric calibration to single-flight calibration [18]. Gao et al introduce the airborne dual-antenna Ka-band InSAR data processing method for typical terrains in China and proposes a robust and efficient method for phase unwrapping of interferometric data and strip adjustment calibration [19]. InSAR block adjustment technology can effectively refine interferometric parameters and support acquiring accurate terrain elevation information, but it cannot accurately obtain planimetric terrain information.…”

Section: Introductionmentioning

confidence: 99%

Block Adjustment of Orientation Parameters and Interferometric Parameters Using Very High-Resolution SAR Data for DSM Mapping

Zhang,

Jin,

Xiong

et al. 2023

IEEE Access

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Block adjustment technology can effectively correct the interferometric parameter errors acquired from Interferometric Synthetic Aperture Radar (InSAR) system. It can reduce the number of required ground control points and improve the accuracy of the generated digital elevation model, making it's an effective means for obtaining three-dimensional information from large-scale terrain information. However, the currently used adjustment models usually only involve surface elevation parameters, which means that the accuracy of the terrain planimetric information entirely relies on the Position and Orientation System (POS) parameters. This may lead to the inaccurate planimetric to be a fundamental weakness which hinder the practical application of this technology. To solve these problems, this paper proposed a DSM (digital surface model) mapping scheme by using very high-resolution synthetic aperture radar (SAR) data that combines the block adjustments of orientation and interferometric parameters. Firstly, the interferometric and orientation parameters are obtained separately by using InSAR and SAR block adjustment techniques. After optimizing the model parameter accuracy, the elevation information obtained from the interferometric parameters is incorporated into the SAR positioning model to acquire the three-dimensional information of the area accurately. Experimental processing was conducted using 23 pairs of airborne InSAR data from two strips in the Weinan area of China. The experimental results demonstrate that the proposed scheme can improve the elevation accuracy by approximately 20%.

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“…The system proposed in this paper is advanced in performance and stability. Compared with the Ka-Band Fixed-Baseline InSAR developed by the Beijing Institute of Radio Measurement and the AXIS (Airborne X-band Interferometric SAR) system developed by the Institute for Remote Sensing of Environment (IREA), National Research Council (CNR) [39,50], ASMIS has a better spatial resolution (0.1 m), fewer GCPs required for elevation assessment, and more imaging modes. We take into account the effects of the undulating terrain, and design antiparallel flight experiments in mountainous areas to obtain data.…”

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confidence: 99%

Airborne Short-Baseline Millimeter Wave InSAR System Analysis and Experimental Results

Wang,

Liu,

Chen

et al. 2024

Remote Sensing

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For the challenges of high-precision mapping in complex terrain, a novel airborne Interferometric Synthetic Aperture Radar (InSAR) system is designed. This system, named ASMIS (Airborne Short-Baseline Millimeter-Wave InSAR System), adopts the coplanar antenna and a pod-type structure. This design makes the system lightweight and highly integrated. It can be compatible with small general aviation flight platforms. The baseline is millimeters in size, which greatly simplifies the unwrapping process. The coplanar antennas have two advantages: they maximize the baseline utilization and minimize the Doppler decorrelation and the motion error inconsistency. Acquisition campaigns of the system have been carried out in Boao, Bayannur, and Chengde, China. In the Chengde experimental area, we designed an antiparallel flight experiment to account for the topographic relief. High-precision Digital Orthophoto Maps (DOMs) and Digital Surface Models (DSMs) at a scale of 1:5000 were obtained. The coordinate Root Mean Square Error (RMSE) of the checkpoints within the obtained DSM is less than 0.82 m in altitude and 3 m horizontally. The RMSE of the Sparse Ground Control Points (GCPs) within the obtained DSM is less than 0.3 m in altitude. Experimental results from different areas, including plains, mountains, and coastlines, demonstrate the system’s performance.

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Experimental Results of Three-Dimensional Modeling and Mapping with Airborne Ka-Band Fixed-Baseline InSAR in Typical Topographies of China

Cited by 6 publications

References 29 publications

Airborne Platform Three-Dimensional Positioning Method Based on Interferometric Synthetic Aperture Radar Interferogram Matching

Airborne Platform Three-Dimensional Positioning Method Based on Interferometric Synthetic Aperture Radar Interferogram Matching

Block Adjustment of Orientation Parameters and Interferometric Parameters Using Very High-Resolution SAR Data for DSM Mapping

Airborne Short-Baseline Millimeter Wave InSAR System Analysis and Experimental Results

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